CN107540544A - A kind of chloride process of thiazole carboxamides production technology - Google Patents
A kind of chloride process of thiazole carboxamides production technology Download PDFInfo
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- CN107540544A CN107540544A CN201610470315.1A CN201610470315A CN107540544A CN 107540544 A CN107540544 A CN 107540544A CN 201610470315 A CN201610470315 A CN 201610470315A CN 107540544 A CN107540544 A CN 107540544A
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- chlorine
- solvent
- chlorination
- caused
- recovery
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Abstract
The invention belongs to chemical products production field, especially thiazole carboxamides production field.Thiazole carboxamides are a kind of important chemical products.Process units is batch production flow, mainly including processes such as bromination, recrystallization, chlorination, cyclization, ammonifications.
Description
Technical field
The invention belongs to chemical products production field, especially thiazole carboxamides production field.
Background technology
Thiazole carboxamides are a kind of important chemical products.Process units is batch production flow, mainly including bromination,
The processes such as recrystallization, chlorination, cyclization, ammonification.
The content of the invention
Production procedure is as follows：
Chlorination reaction
Trifluoroacetic ethyl acetoacetate at low temperature, 2- chlorine trifluoroacetyl acetic acid is obtained in solvent is to two benzotrifluorides by chlorine
Ethyl ester.Chlorination reaction temperature is 0 degree Celsius, and the reaction time is 6 h.The molar ratio of trifluoroacetic ethyl acetoacetate and chlorine
For 1:1.015.The 2- chlorine trifluoroacetic ethyl acetoacetates obtained after solvent are distilled off.Caused hydrogen chloride gas in chlorination process
After 2 grades of falling film absorptions, caused hydrochloric acid is sold as byproduct, again through chlorine recovery device recovery set after falling film absorption
With chlorine almost all in the case where not leaking reclaims.Caused hydrogen chloride gas is after acid gas absorption plant absorbs
Discharge.
Under abnormal condition, chlorine recovery device is stopped, hydrogen chloride（Containing chlorine）Enter acidity again after alkali liquor absorption
Gas concentration unit.In solvent recovery process, it is 110 DEG C to control vapo(u)rizing temperature, distillation time 6h.Two benzotrifluorides are distilled
The emptying of tower and receiving tank, after the cold well cooling buffering of two-stage, there is a small amount of solvent to two benzotrifluorides（G3-5）It is laggard through collecting
Uncontrollable discharge tail gas absorbing system.Solvent recovering rate is 99%.
Reaction equation：
Chlorination
。
Claims (2)
1. the present invention relates to material composition and proportioning.
2. the present invention relates to production procedure：Chlorination reaction, trifluoroacetic ethyl acetoacetate at low temperature, in solvent to two benzotrifluorides
In 2- chlorine trifluoroacetic ethyl acetoacetates are obtained by chlorine；Chlorination reaction temperature is 0 degree Celsius, and the reaction time is 6 h；Trifluoro
The molar ratio of ethyl acetoacetate and chlorine is 1:1.015；The 2- chlorine trifluoroacetyl acetic acid obtained after solvent is distilled off
Ethyl ester；Caused hydrogen chloride gas after 2 grades of falling film absorptions, as byproduct sell by caused hydrochloric acid in chlorination process, drop
Again through chlorine recovery device recovery after film absorption, chlorine almost all in the case where not leaking reclaims；Caused chlorination
Hydrogen discharges after acid gas absorption plant absorbs；Under abnormal condition, chlorine recovery device is stopped, hydrogen chloride
（Containing chlorine）Enter sour gas retracting device again after alkali liquor absorption；In solvent recovery process, it is 110 DEG C to control vapo(u)rizing temperature,
Distillation time is 6h；Emptying to two benzotrifluoride destilling towers and receiving tank, after the cold well cooling buffering of two-stage, there is a small amount of solvent
To two benzotrifluorides（G3-5）Through collecting laggard uncontrollable discharge tail gas absorbing system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610470315.1A CN107540544A (en) | 2016-06-27 | 2016-06-27 | A kind of chloride process of thiazole carboxamides production technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610470315.1A CN107540544A (en) | 2016-06-27 | 2016-06-27 | A kind of chloride process of thiazole carboxamides production technology |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107540544A true CN107540544A (en) | 2018-01-05 |
Family
ID=60960129
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610470315.1A Pending CN107540544A (en) | 2016-06-27 | 2016-06-27 | A kind of chloride process of thiazole carboxamides production technology |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107540544A (en) |
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2016
- 2016-06-27 CN CN201610470315.1A patent/CN107540544A/en active Pending
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20180105 |