CN107540578A - A kind of adjacent trifluoromethoxy benzenesulfonyl isocyanate production technology - Google Patents
A kind of adjacent trifluoromethoxy benzenesulfonyl isocyanate production technology Download PDFInfo
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- CN107540578A CN107540578A CN201610470332.5A CN201610470332A CN107540578A CN 107540578 A CN107540578 A CN 107540578A CN 201610470332 A CN201610470332 A CN 201610470332A CN 107540578 A CN107540578 A CN 107540578A
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- adjacent
- dichlorohenzene
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Abstract
The present invention relates to chemical products production field, especially adjacent trifluoromethoxy benzenesulfonyl isocyanate production field.Adjacent trifluoromethoxy benzenesulfonyl isocyanate is a kind of important chemical products.Adjacent trifluoromethoxy benzenesulfonyl isocyanate process units is batch production flow, mainly includes the processes such as synthesis, purging, precipitation, rectifying.
Description
Technical field
The present invention relates to chemical products production field, especially adjacent trifluoromethoxy benzenesulfonyl isocyanate production field.
Background technology
Adjacent trifluoromethoxy benzenesulfonyl isocyanate is a kind of important chemical products.Adjacent trifluoromethoxy benzene sulfonyl isocyanide
Acid esters process units is batch production flow, mainly includes the processes such as synthesis, purging, precipitation, rectifying.
The content of the invention
Technological process
Process units is batch production flow, by the ortho-trifluoro-metoxybenzene sulfamide measured and organic solvent（Adjacent dichloro
Benzene）Put into reactor, for controlling reaction temperature at 80 DEG C, the reaction time is 24 hours.Instill by a certain amount of solvent（Adjacent dichloro
Benzene）The solid phosgene of dissolving.The molar ratio of ortho-trifluoro-metoxybenzene sulfamide and solid phosgene is 1:1.056 react
Finish and use nitrogen stripping pernicious gas, hydrogen chloride gas is produced in building-up process and passes through 2 grades of water falling film absorptions+alkali destruction+sour gas
After body absorption plant absorbs, caused hydrochloric acid is sold as byproduct.Unabsorbed hydrogen chloride gas discharges through aiutage.Purging
Caused phosgene discharges after falling film absorption+alkali destruction+acid gas absorption plant absorbs.After the completion of synthetic reaction, removing is molten
Agent o-dichlorohenzene, in solvent recovery process, it is 110-130 DEG C to control vapo(u)rizing temperature, and distillation time is 8 h.O-dichlorohenzene distills
The emptying of tower and receiving tank, after the cold well cooling buffering of two-stage, there is a small amount of organic exhaust gas through collecting laggard uncontrollable discharge tail gas
Absorption system, solvent recovering rate 99.2%.Adjacent trifluoromethoxy benzenesulfonyl isocyanate crude product rectifying obtains certified products sale.Essence
Evaporate control
150-160 DEG C of temperature, rectifying 50h.Water circulating type vacuum pump exhaust used in crude product rectifying enters water ring vacuum pump, arranges
Water is handled into Sewage Disposal.Caused rectifying still is residual to have sent qualification processed in units to handle.Adjacent trifluoromethoxy benzene sulfonyl is different
The ultimate yield of cyanate product is 98.3%.
Synthetic reaction workshop section main material service condition
| Material | Ortho-trifluoro-metoxybenzene sulfamide (99%) | Solid phosgene (99%) | Product | Adjacent trifluoromethoxy benzenesulfonyl isocyanate (98%) | Hydrogen chloride |
| Molecular weight | 241 | 297 | Molecular weight | 267 | 36.5 |
| Addition | 310 | 129 | Theoretical amount | 334.8 | 89 |
| Consumption | 298.3 | 132.67 | 332 | 88.3 |
Reaction equation：
。
Claims (2)
1. the present invention relates to material composition and proportioning.
2. the present invention relates to technological process：Process units is batch production flow, the adjacent trifluomethoxybenzene sulphur that will be measured
Acid amides and organic solvent（O-dichlorohenzene）Put into reactor, for controlling reaction temperature at 80 DEG C, the reaction time is 24 hours；Drop
Enter by a certain amount of solvent（O-dichlorohenzene）The solid phosgene of dissolving；Ortho-trifluoro-metoxybenzene sulfamide and feeding intake for solid phosgene are rubbed
You are than being 1:1.056, reaction is finished with nitrogen stripping pernicious gas, and hydrogen chloride gas is produced in building-up process and is dropped by 2 grades of water
After film absorption+alkali destruction+acid gas absorption plant absorbs, caused hydrochloric acid is sold as byproduct；Unabsorbed hydrogen chloride
Gas discharges through aiutage；Phosgene caused by purging discharges after falling film absorption+alkali destruction+acid gas absorption plant absorbs；
After the completion of synthetic reaction, desolvation o-dichlorohenzene, in solvent recovery process, it is 110-130 DEG C to control vapo(u)rizing temperature, during distillation
Between be 8 h；The emptying of o-dichlorohenzene destilling tower and receiving tank, after the cold well cooling buffering of two-stage, there is a small amount of organic exhaust gas through receiving
Collect laggard uncontrollable discharge tail gas absorbing system, solvent recovering rate 99.2%；Adjacent trifluoromethoxy benzenesulfonyl isocyanate crude product
Rectifying obtains certified products sale；150-160 DEG C of distillation control temperature, rectifying 50h；Water circulating type vacuum pump used in crude product rectifying
Exhaust enters water ring vacuum pump, is drained into Sewage Disposal processing；Caused rectifying still is residual to have sent qualification processed in units to handle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610470332.5A CN107540578A (en) | 2016-06-27 | 2016-06-27 | A kind of adjacent trifluoromethoxy benzenesulfonyl isocyanate production technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610470332.5A CN107540578A (en) | 2016-06-27 | 2016-06-27 | A kind of adjacent trifluoromethoxy benzenesulfonyl isocyanate production technology |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107540578A true CN107540578A (en) | 2018-01-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610470332.5A Pending CN107540578A (en) | 2016-06-27 | 2016-06-27 | A kind of adjacent trifluoromethoxy benzenesulfonyl isocyanate production technology |
Country Status (1)
| Country | Link |
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| CN (1) | CN107540578A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108939861A (en) * | 2018-07-30 | 2018-12-07 | 江苏常丰农化有限公司 | A kind of processing method of 2,4-D exhaust gas |
-
2016
- 2016-06-27 CN CN201610470332.5A patent/CN107540578A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108939861A (en) * | 2018-07-30 | 2018-12-07 | 江苏常丰农化有限公司 | A kind of processing method of 2,4-D exhaust gas |
| CN108939861B (en) * | 2018-07-30 | 2020-10-02 | 江苏常丰农化有限公司 | 2,4-D waste gas treatment method |
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Legal Events
| Date | Code | Title | Description |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20180105 |
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| WD01 | Invention patent application deemed withdrawn after publication |