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. Tên gọi khác: Axit Frohydric, HF, Frohydric acid
. Tổng quan Axit Frohydric – HF.
Đặc tính: Axit flohiđric là một dung dịch của hydrogen fluoride (HF) trong nước, Cùng với hydrogen fluoride, hydrofluoric acid là một nguồn flo quý giá, là chất tiền thân của nhiều dược phẩm, polymer (ví dụ Teflon), và phần lớn các chất tổng hợp có chứa flo. Người ta biết đến axit này nhiều nhất là khả năng hòa tan kính của nó do axit này tác dụng với SiO2, thành phần chính của kính. Quá trình hòa tan có thể miêu tả như sau:
SiO2(s) + 4HF(aq) → SiF4(g) + 2H2O(l)
SiO2(s) + 6HF(aq) → H2[SiF6](aq) + 2H2O(l)
Bởi tính chất phản ứng mạnh với kính, axit flohidric thường được lưu chứa trong các bình nhựa polyethylene hoặc Teflon. Nó cũng đặc trưng bởi khả năng hòa tan nhiều kim loại và oxit của các á kim.
. Ứng dụng:
Lọc dầu.
Trong một tiêu chuẩn nhà máy lọc dầu quá trình được gọi là ankyl hóa , isobutane Alkylated với trọng lượng phân tử thấp các alkene (chủ yếu là một hỗn hợp của propylen , butylen ) trong sự hiện diện của chất xúc tác acid mạnh có nguồn gốc từ acid HF. Chất xúc tác protonates các alkene (propylen, butylen) để sản xuất carbocations phản ứng , mà alkylate isobutane. Phản ứng này được thực hiện ở nhiệt độ nhẹ (0 và 30 ° C) trong một phản ứng hai giai đoạn.
fluoride trong môi trường, công nghệ thay thế đang được tìm kiếm. Florua vô cơ khác được chuẩn bị từ acid HF bao gồm sodium fluoride và hexafluoride uranium .
Chất ăn mòn và làm sạch
Khả năng của acid HF để hòa tan các oxit kim loại là cơ sở của một số ứng dụng. Nó loại bỏ các tạp chất oxit từ thép không gỉ, một quá trình được gọi là tẩy, và các tấm wafersilicon trong ngành công nghiệp chất bán dẫn. Về vấn đề này cũng được gọi là BHF, (khi đệm với Fluoride Amoni), và BOE (cho Oxide đệm Etch). Nó là một thành phần quan trọng của Wright Etch và HNA tương tự (HF + Nitric + Acetic Acid) etch. Theo cách tương tự, nó cũng được sử dụng để etch kính . Gel axit 5% đến 9% HF cũng thường được sử dụng để etch tất cả các phục hồi nha khoa gốm để cải thiện liên kết. Đối với lý do tương tự, pha loãng axít flohiđric là một thành phần của hộ gia đình tẩy vết gỉ và xe rửa"sạch bánh xe" các hợp chất. HF axit tấn công thủy tinh bằng cách phản ứng với silicon dioxide để tạo thành các florua silicon khí hoặc hòa tan trong nước. Quá trình này giải thể tiến hành như sau:
SiO 2 + 4 HF → SIF 4 (g) + 2 H 2 O
SiO 2 + 6 HF → H 2 SIF 6 + 2 H 2 O
Bởi vì khả năng hòa tan oxit sắt cũng như silica-chất gây ô nhiễm, axit HF được sử dụng trước khi vận hành nồi hơi sản xuất hơi nước áp suất cao.
Ứng dụng phá đá
Bởi vì khả năng của mình để hòa tan các oxit, axit HF là hữu ích cho việc giải thể các mẫu đá (thường là bột) trước khi phân tích. Theo cách tương tự, axit này được sử dụng trong macerations axit để trích xuất các hóa thạch hữu cơ từ các loại đá silicat. Fossiliferous đá có thể được nhúng trực tiếp vào acid, hoặc một bộ phim cellulose nitrate có thể được áp dụng (giải thể trong acetate amilic), tuân thủ các thành phần hữu cơ và cho phép đá bị giải thể xung quanh nó.
Pha loãng axít flohiđric (1-3% khối lượng) được sử dụng trong ngành công nghiệp dầu khí trong hỗn hợp với axit (HCl hoặc acid hữu cơ) để kích thích sản xuất của nước, dầu, và các giếng khí đốt đặc biệt, nơi đá sa thạch được tham gia
Acid HF cũng được sử dụng bởi một số nhà sưu tập các chai thủy tinh cổ để loại bỏ cái gọi là bệnh từ thủy tinh, gây ra bởi axit (thường là trong đất chai được chôn cất tại) tấn công các nội dung soda của kính.
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Sending newsletters via forms into the "Contact us" section to the sites of firms via any countries of the world in any languages.
website =» xn----7sbb1bbndheurc1a.xn--p1ai
WHAT IS THE MAILING OF SITES BY FEEDBACK FORMS?
This is a type of mailing using the feedback forms that are located in the contact section of the website and filled by our robot in automatic mode with a rate of a few thousand feedback forms per 1 minute, while the alphabetic and numeric code from the pictures (captcha) is also solved.
After that, the messages including your business offers are sent to the electronic addresses of firms.
When sending mailing by contact feedback forms, it turns out that each website sends a correspondent e-mail “to itself” and, therefore, all e-mails arrive in the inbox of the exact email in which the organisation receives the correspondent emails.
UTP:
Fast 100% informing of businesses and site owners about new business offers.
Search of new customers that other advertisements cannot find.
AIM:
Finding new customers that cannot be found through other advertisements.
Benefits:
1.100-percent delivery of business messages.
2.Increase of the customer database.
3. Expansion of the market segment.
4.Regionality and topic orientated mailings.
5. Sending e-mails to directors.
6. Conducting tenders.
7. Conducting marketing research.
8. Studying public opinion and conducting surveys.
9. High-speed notification.
10. Price.
11. Entering the international markets.
Competitive advantages:
1.When sending mailing by contact forms, all letters arrive in the inbox. When sending bulk e-mails, this can reach up to 5 percent.
2.When sending mailing by feedback forms it is possible to send a few million messages per day to inboxes. When sending bulk e-mails a few thousands arrive in the inboxes, the remaining ones often either are not delivered or fill the junk folder.
3. When sending mailing by feedback forms an e-mail does not get blocked by mails because it is sent from different sites. When sending e-mail newsletters it is possible to send a few thousands of those but nevertheless all the IP addresses from which the mailing is done will be banned.
4. When sending mailing by contact forms the very little amount of macros is used to form headings and text of the letter. When sending e-newsletters, it is necessary to use synonyms («macros») for each phrase and create ten thousand different headings.
5. Many organisations deliberatelly hide their email and only leave a contact form for contacting with them.
6. When sending e-mail newsletters, your cooperation offer is delivered to every employee of the organisation, (which causes discontent) compared to mailing by contact forms where the letter is received at the email specifically set up for commercial offers.
7.1/2 part of corporate e-mail addresses are located on free mail servers, they are badly "searchable" by e-mail, but when sending mailing by contact forms through these e-mail servers, all e-mails are 100-percent delivered to the recipients.
8. Only thirty-forty % of companies are published in the directories within several years, and all the rest are already placed in our WHOIS databases and are waiting for your business offers.
It turns out that that emails of firms from directories are filled with spam, and therefore they will not have such profit as when sending mailing by contact forms using our always new WHOIS databases.
9. Any kind of stop words in the headings or body of the letter can be sent through feedback forms. When sending e-mail newsletters, such letters either are not delivered the recipient or arrive in junk.
The list of stop words of mail systems includes almost all words and phrases that encourage potential customers to take actions.
Application:
1. Expanding the customer base.
2. Quick notification of marketplaces about new business offers.
3. Reaching out company officials.
4.Testing the demand for products and services.
5. Conducting tenders.
6.Conducting marketing research.
7.Studying public opinion and conducting surveys.
8. Searching for clients internationally.
Reasons for ordering this service:
1. one hundred percent delivery of your letters and business offers to millions of organisations all over the globe.
Every internet resource sends a e-mail to itself so all filters of mails are bypassed.
2.Mailing by feedback forms is an great way in for conducting various researches of marketing, studies and surveys of social opinion on anytype of activity and direction.
When sending mailing by feedback forms, you will will be absolutely sure that your letter has been delivered to one hundred percent of consumers of your service and product and if a product or service is "poorly promoted", then the potential issue lies in other things, for example in prices.
At the same time, within one week you will see demand for your products and services, you will not have to spend funds on rent and other more expensive and time-consuming marketing events.
3.Mailing by contact forms is the most economical and quickest way to get your service or product to the markets of other countries.
4. Mailing by contact forms is a great tool for conducting different tenders.
5.Weekly update of the database, as more than 150,000 new sites, are registered all over the world daily, and you, get potentially new clients.
6. Full geographical coverage for all countries of the globe.
7. We offer customers that are not available through other types of advertisement.
When sending mailing by feedback forms, you will be able to reach out that part of your clientele, that are impossible to find automatically in any other way.
For instance, you will be able to send a commercial offer to those potential clients that were earlier out of reach due to mail filters while sending e-newsletters.
Now, there is a unusual situation: businesses that got into the directories are literally spammed with all sorts of commercial offers while very little or no e-mails are sent to the rest.
8. Unique technology of decoding the CAPTCHA.
There are special services for decrypting numeric and alphabetic code (captcha/CAPTCHA). It costs 1 dollar to solve thousand captchas.
It follows from this that, processing one million websites our robot decrypts a million CAPTCHAs, which costs 1000 dollars only to decode captcha/CAPTCHA, and with our service this is free of charge for you!
9. By ordering mailing by feedback forms, you are promoting your product or service not to separate people, but to entire organisations, for example domain .com, where more than 150 million commercial firms from all countries are accumulated (we have samples of them from international zones for every state).
10. Mailing by contact forms also includes a type of text mailing
E-mail that is linked to the feedback form is the main mailbox of companies through which orders and cooperation offers are sent. This mail is also set up for cell phones as it is necessary to respond to the messages fast so as not to lose the application or the relevance of the cooperation offer.
11. The database of every country also includes all joint firms from all countries of the world working with or closely related to this country, for example, national communities and diasporas.
Sanctions of mail systems and search engines?
These mailings are an alternative to sending mass e-mails, therefore search engine sanctions and "BAN" do not apply to them.
Mail service delivers the data of e-mails to the inbox folder, as it bypasses through the "warm e-mail channel" from the new IP address of the site to the corporate e-mail of the same site.
Simply speaking, these mailings "live in e-mails" and filters of mail systems do not respond to them, because mail systems have great trust in communication channels between sites and corporate mailboxes.
OUR DATABASES:
You can purchase our databases separately from the mailing by sending us a message by contact form.
MORE THAN 2000 VOIS DATABASES BY DOMAIN ZONES AND COUNTRIES.
COLLECTIONS OF DATABASES BY THE MAIN CONTINENTS.
COLLECTIONS OF DATABASES BY THE MAIN WORLD LANGUAGES.
COLLECTIONS OF DATABASES BY THE MAIN CMS.
COLLECTIONS OF DATABASES BY THE MAIN COUNTRIES.
HOW TO MAKE AN PROMOTIONAL OFFER FOR MAILING BY CONTACT FORMS:
The simplest text + headings, the main goal is to interest the customer, and they will read the rest on your website.
Most likely, all ads on your subject are already on the Internet networks, enter the necessary requests into the search bar and choose the most interesting ones.
The headings are substituted randomly from text file.
Only messages in the text form are sent, links are inserted without problems, they are all "clickable". If the customer needs pictures or more specific information, then you should forward the client to visit your site.
In the letter:
Text without pictures, since pictures do not pass through the feedback form.
Your contact details:
Internet resource address:
Fields to fill in:
Name:
Country:
City:
Website:
Several headings:
E-mail address for automatic responces:
website =» xn----7sbb1bbndheurc1a.xn--p1ai
Price List =» xn----7sbb1bbndheurc1a.xn--p1ai/en/price/
Sending newsletters via forms into the "Contact us" section to the sites of firms via any countries of the world in any languages.
website =» xn----7sbb1bbndheurc1a.xn--p1ai
WHAT IS THE MAILING OF SITES BY FEEDBACK FORMS?
This is a type of mailing using the feedback forms that are located in the contact section of the website and filled by our robot in automatic mode with a rate of a few thousand feedback forms per 1 minute, while the alphabetic and numeric code from the pictures (captcha) is also solved.
After that, the messages including your business offers are sent to the electronic addresses of firms.
When sending mailing by contact feedback forms, it turns out that each website sends a correspondent e-mail “to itself” and, therefore, all e-mails arrive in the inbox of the exact email in which the organisation receives the correspondent emails.
UTP:
Fast 100% informing of businesses and site owners about new business offers.
Search of new customers that other advertisements cannot find.
AIM:
Finding new customers that cannot be found through other advertisements.
Benefits:
1.100-percent delivery of business messages.
2.Increase of the customer database.
3. Expansion of the market segment.
4.Regionality and topic orientated mailings.
5. Sending e-mails to directors.
6. Conducting tenders.
7. Conducting marketing research.
8. Studying public opinion and conducting surveys.
9. High-speed notification.
10. Price.
11. Entering the international markets.
Competitive advantages:
1.When sending mailing by contact forms, all letters arrive in the inbox. When sending bulk e-mails, this can reach up to 5 percent.
2.When sending mailing by feedback forms it is possible to send a few million messages per day to inboxes. When sending bulk e-mails a few thousands arrive in the inboxes, the remaining ones often either are not delivered or fill the junk folder.
3. When sending mailing by feedback forms an e-mail does not get blocked by mails because it is sent from different sites. When sending e-mail newsletters it is possible to send a few thousands of those but nevertheless all the IP addresses from which the mailing is done will be banned.
4. When sending mailing by contact forms the very little amount of macros is used to form headings and text of the letter. When sending e-newsletters, it is necessary to use synonyms («macros») for each phrase and create ten thousand different headings.
5. Many organisations deliberatelly hide their email and only leave a contact form for contacting with them.
6. When sending e-mail newsletters, your cooperation offer is delivered to every employee of the organisation, (which causes discontent) compared to mailing by contact forms where the letter is received at the email specifically set up for commercial offers.
7.1/2 part of corporate e-mail addresses are located on free mail servers, they are badly "searchable" by e-mail, but when sending mailing by contact forms through these e-mail servers, all e-mails are 100-percent delivered to the recipients.
8. Only thirty-forty % of companies are published in the directories within several years, and all the rest are already placed in our WHOIS databases and are waiting for your business offers.
It turns out that that emails of firms from directories are filled with spam, and therefore they will not have such profit as when sending mailing by contact forms using our always new WHOIS databases.
9. Any kind of stop words in the headings or body of the letter can be sent through feedback forms. When sending e-mail newsletters, such letters either are not delivered the recipient or arrive in junk.
The list of stop words of mail systems includes almost all words and phrases that encourage potential customers to take actions.
Application:
1. Expanding the customer base.
2. Quick notification of marketplaces about new business offers.
3. Reaching out company officials.
4.Testing the demand for products and services.
5. Conducting tenders.
6.Conducting marketing research.
7.Studying public opinion and conducting surveys.
8. Searching for clients internationally.
Reasons for ordering this service:
1. one hundred percent delivery of your letters and business offers to millions of organisations all over the globe.
Every internet resource sends a e-mail to itself so all filters of mails are bypassed.
2.Mailing by feedback forms is an great way in for conducting various researches of marketing, studies and surveys of social opinion on anytype of activity and direction.
When sending mailing by feedback forms, you will will be absolutely sure that your letter has been delivered to one hundred percent of consumers of your service and product and if a product or service is "poorly promoted", then the potential issue lies in other things, for example in prices.
At the same time, within one week you will see demand for your products and services, you will not have to spend funds on rent and other more expensive and time-consuming marketing events.
3.Mailing by contact forms is the most economical and quickest way to get your service or product to the markets of other countries.
4. Mailing by contact forms is a great tool for conducting different tenders.
5.Weekly update of the database, as more than 150,000 new sites, are registered all over the world daily, and you, get potentially new clients.
6. Full geographical coverage for all countries of the globe.
7. We offer customers that are not available through other types of advertisement.
When sending mailing by feedback forms, you will be able to reach out that part of your clientele, that are impossible to find automatically in any other way.
For instance, you will be able to send a commercial offer to those potential clients that were earlier out of reach due to mail filters while sending e-newsletters.
Now, there is a unusual situation: businesses that got into the directories are literally spammed with all sorts of commercial offers while very little or no e-mails are sent to the rest.
8. Unique technology of decoding the CAPTCHA.
There are special services for decrypting numeric and alphabetic code (captcha/CAPTCHA). It costs 1 dollar to solve thousand captchas.
It follows from this that, processing one million websites our robot decrypts a million CAPTCHAs, which costs 1000 dollars only to decode captcha/CAPTCHA, and with our service this is free of charge for you!
9. By ordering mailing by feedback forms, you are promoting your product or service not to separate people, but to entire organisations, for example domain .com, where more than 150 million commercial firms from all countries are accumulated (we have samples of them from international zones for every state).
10. Mailing by contact forms also includes a type of text mailing
E-mail that is linked to the feedback form is the main mailbox of companies through which orders and cooperation offers are sent. This mail is also set up for cell phones as it is necessary to respond to the messages fast so as not to lose the application or the relevance of the cooperation offer.
11. The database of every country also includes all joint firms from all countries of the world working with or closely related to this country, for example, national communities and diasporas.
Sanctions of mail systems and search engines?
These mailings are an alternative to sending mass e-mails, therefore search engine sanctions and "BAN" do not apply to them.
Mail service delivers the data of e-mails to the inbox folder, as it bypasses through the "warm e-mail channel" from the new IP address of the site to the corporate e-mail of the same site.
Simply speaking, these mailings "live in e-mails" and filters of mail systems do not respond to them, because mail systems have great trust in communication channels between sites and corporate mailboxes.
OUR DATABASES:
You can purchase our databases separately from the mailing by sending us a message by contact form.
MORE THAN 2000 VOIS DATABASES BY DOMAIN ZONES AND COUNTRIES.
COLLECTIONS OF DATABASES BY THE MAIN CONTINENTS.
COLLECTIONS OF DATABASES BY THE MAIN WORLD LANGUAGES.
COLLECTIONS OF DATABASES BY THE MAIN CMS.
COLLECTIONS OF DATABASES BY THE MAIN COUNTRIES.
HOW TO MAKE AN PROMOTIONAL OFFER FOR MAILING BY CONTACT FORMS:
The simplest text + headings, the main goal is to interest the customer, and they will read the rest on your website.
Most likely, all ads on your subject are already on the Internet networks, enter the necessary requests into the search bar and choose the most interesting ones.
The headings are substituted randomly from text file.
Only messages in the text form are sent, links are inserted without problems, they are all "clickable". If the customer needs pictures or more specific information, then you should forward the client to visit your site.
In the letter:
Text without pictures, since pictures do not pass through the feedback form.
Your contact details:
Internet resource address:
Fields to fill in:
Name:
Country:
City:
Website:
Several headings:
E-mail address for automatic responces:
website =» xn----7sbb1bbndheurc1a.xn--p1ai
Price List =» xn----7sbb1bbndheurc1a.xn--p1ai/en/price/
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