CN103360295A - Device and method for preparing perchloromethylmercaptan - Google Patents
Device and method for preparing perchloromethylmercaptan Download PDFInfo
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- CN103360295A CN103360295A CN 201210101219 CN201210101219A CN103360295A CN 103360295 A CN103360295 A CN 103360295A CN 201210101219 CN201210101219 CN 201210101219 CN 201210101219 A CN201210101219 A CN 201210101219A CN 103360295 A CN103360295 A CN 103360295A
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Abstract
The invention discloses a method for preparing perchloromethylmercaptan. The method comprises the following steps of: adding carbon disulfide and hydrochloric acid in two chlorination reaction kettles, using the 1# kettle as the primary chlorination reaction kettle and controlling the temperature of the 1# kettle to 20 DEG C-30 DEG C, and ventilating chlorine gas for carrying out the chlorination reaction; using the 2# kettle as the secondary chlorination reaction kettle, stopping the reaction when the density of reaction liquid of the 1# kettle reaches 1.65-1.68, transferring the reactant to a treatment kettle after the reaction is ended, stewing and layering the product, wherein the upper layer is mixed acid and the lower layer is product perchloromethylmercaptan; adding the carbon disulfide and the hydrochloric acid to the 1# chlorination reaction kettle, using the kettle as the secondary reaction kettle, using the 2# kettle as the primary reaction kettle, and ventilating chlorine gas for carrying out the chlorination reaction; and alternatively using the two series-connected reaction kettles for recycling and collecting the carbon disulfide, so that the preparation of the perchloromethylmercaptan is completed. The method for preparing the perchloromethylmercaptan disclosed by the invention can be used for effectively recycling the carbon disulfide and the chlorine gas, improving the product quality, lowering the production cost and overcoming the damages of the carbon disulfide run-off in the prior art to the environment and the body health.
Description
Technical field
The present invention relates to chemical technology field, be specifically related to a kind of method for preparing perchloro methyl-mercaptan.
Background technology
Perchloro methyl-mercaptan is the important intermediate raw materials of agricultural bactericide such as Vancide 89, Phaltan, etridiazole, though such pesticide species is old, year sales volume is up to ten thousand tons in the international market, and modern new variety disinfectant use in agriculture is difficult to substitute.Develop the intermediate of this series bactericidal agent, be the task of top priority for this reason.
At present, the production method of perchloro methyl-mercaptan (being PMM) is few, and commonly used is makes perchloro methyl-mercaptan take dithiocarbonic anhydride, dilute hydrochloric acid, chlorine as raw material by chlorination, and its reaction formula is as follows:
Its technological process is:
Dilute hydrochloric acid is added the chlorination reaction still, then add dithiocarbonic anhydride, open to stir and to treat that temperature began when being raised to 25-30 ℃ logical chlorine 20-25 hour, get the proportion that liquid is surveyed PMM, finish to react when above when proportion reaches 1.65.
Can find out from above-mentioned reaction principle: the perchloro methyl-mercaptan building-up process, the chlorine of 1mol dithiocarbonic anhydride and 5mol carries out chlorination reaction, generates the perchloro methyl-mercaptan of 1mol, 6mol hydrochloric acid.In the perchloro methyl-mercaptan building-up process, chlorination reaction is to react with single reaction vessel, that dithiocarbonic anhydride carries out under the condition of logical chlorine, the a large amount of hydrogen chloride gas that produce in this reaction process need to discharge, because the amount that hydrogen chloride gas is discharged is large, can take away 2/5 left and right sides lower boiling dithiocarbonic anhydride that has not reacted and the chlorine that is dissolved in the dithiocarbonic anhydride when discharging hydrogen chloride gas, the yield of product only has 60-65%.Dithiocarbonic anhydride and the chlorine taken away in the perchloro methyl-mercaptan building-up process do not reclaim, and workers with long time is worked under the condition of dithiocarbonic anhydride run, drip, leak and had a strong impact on healthyly, and also affecting product must measure, and has increased production cost, has reduced production efficiency.The dense serious environment pollution of smell, dithiocarbonic anhydride discharge capacity cause greatly easily and catch fire.
From above analytical results, exist many places not enough on the existing technical matters method and apparatus: 1. take away about the 2/5 low dithiocarbonic anhydride that boil when hydrogen chloride gas is discharged and do not reclaim, the yield of product is reduced, increase production cost; 2. dithiocarbonic anhydride does not reclaim affects the healthy of operator; 3. dithiocarbonic anhydride does not reclaim the dense serious environment pollution of smell; 4. large the causing easily owing to flash-point is low of dithiocarbonic anhydride discharge capacity catches fire.
Toxicity is high in addition because there is above problem in perchloro methyl-mercaptan production, and smell is large, and the problems such as equipment corrosion is strong be can't resolve, and does not up to the present domesticly carry out scale production.
Summary of the invention
Primary and foremost purpose of the present invention is to overcome the shortcoming of prior art with not enough, and a kind of method for preparing perchloro methyl-mercaptan is provided, and the method is taked the mode of equipment series winding, the dithiocarbonic anhydride of revealing and be dissolved in chlorine recovery in the dithiocarbonic anhydride; And solved the problem of equipment corrosion, the run, drip, leak pollution on the environment of perchloro methyl-mercaptan and dithiocarbonic anhydride and the harm that HUMAN HEALTH is caused have been avoided, by the dithiocarbonic anhydride recycling that reclaims, improved the output of product, reduced production cost.
Purpose of the present invention is achieved through the following technical solutions:
A kind of method for preparing perchloro methyl-mercaptan may further comprise the steps:
(1) in two chlorination reaction stills, adds dithiocarbonic anhydride and hydrochloric acid, open and stir, open the chilled brine valve of two chlorination reaction still overhead condenser;
(2) the 1# still as chlorination reaction main reaction still, its temperature is controlled at 20-30 ℃, pass into chlorine and carry out chlorination reaction; The secondary reacting kettle of 2# reactor during as chlorination, the dithiocarbonic anhydride in the main reaction still and be dissolved in the chlorine that the reaction of not participating in the dithiocarbonic anhydride and cool down by condensing equipment and enter secondary reacting kettle, the temperature of secondary reacting kettle is controlled at 10-20 ℃;
(3) termination reaction when the density of 1# still reaction solution reaches 1.65-1.68 reaches till the above-mentioned density reaction solution otherwise continue logical chlorine; Finishing thalidomide stirs.Product standing demix, upper strata are nitration mixture, and lower floor is the product perchloro methyl-mercaptan;
(4) add dithiocarbonic anhydride and hydrochloric acid toward 1# chlorination reaction still again, then with this still as secondary reacting kettle, as the main reaction still, logical chlorine carries out chlorination reaction the 2# still; Two consecutive reaction stills so are used alternatingly recovery pounce on collection dithiocarbonic anhydride to finish the preparation of perchloro methyl-mercaptan.
The described adding dithiocarbonic anhydride in step (1) and (4) and hydrochloric acid, its mol ratio is 1: 0.3-1.
The present invention is used alternatingly two consecutive reaction stills, and the dithiocarbonic anhydride that hydrochloric acid is carried secretly the reaction of participation and the complete chlorine of unreacted with being dissolved in the dithiocarbonic anhydride, and through overcooling, a part is got back in the reaction flask, and another part reclaims and enters into secondary reacting kettle.Because dithiocarbonic anhydride is recycled, the problem pollution on the environments such as run, drip, leak have been avoided, the harm that HUMAN HEALTH is caused.Because dithiocarbonic anhydride is recycled and has improved the low defective of production efficiency.The hydrogen chloride gas of discharging is recycled owing to organism dithiocarbonic anhydride, the hydrochloric acid that enters hydrochloric acid absorption tower absorbs by circulation, content reaches more than 30.0%, can be used as industrial goods sells, avoid bringing into of organic impurities to cause pollution to environment, reached the purpose that perchloro methyl-mercaptan cleans production.
The present invention has following advantage and effect with respect to prior art:
(1) the present invention is used alternatingly two consecutive reaction stills, can efficient recovery dithiocarbonic anhydride and chlorine, avoided the problem pollution on the environment such as run, drip, leak of dithiocarbonic anhydride and the harm that HUMAN HEALTH is caused.
(2) the present invention has improved the low defective of raw material availability because dithiocarbonic anhydride is recycled, and by the dithiocarbonic anhydride recycling that will reclaim, has improved the output of product, has reduced production cost.
(3) hydrogen chloride gas of the present invention's discharge can be used as the industrial goods sale because organism dithiocarbonic anhydride is recycled, and the hydrochloric acid that enters hydrochloric acid absorption tower absorbs by circulation, and content reaches more than 30.0%, has improved the comprehensive utilization value of raw material.
Description of drawings
Fig. 1 is the connection diagram that the present invention prepares perchloro methyl-mercaptan method equipment therefor;
Wherein, 1-1# chlorination reaction still; 2-1# chlorination reaction still; 3,4-condenser; 5,6-test tank; 7,8-gas buffer tank; 9,10-pump.
Fig. 2 is the connection diagram that prior art prepares the perchloro methyl-mercaptan equipment therefor;
Wherein, 1-chlorination reaction still; The 2-condenser; 3,4-test tank; 5,6-gas buffer tank; 7,8-pump.
Embodiment
The present invention is described in further detail below in conjunction with embodiment and accompanying drawing, but embodiments of the present invention are not limited to this.
Embodiment 1
In the 1000ml four-hole bottle that stirring, thermometer, condenser and logical chlorine device are housed, (99.0%, dithiocarbonic anhydride 3.2826mol), 200.0 restrains (mass concentrations 30.0% to add 252 grams; 1.6438mol) hydrochloric acid, open and stir, the fluid temperature of question response bottle is raised to 25-30 ℃, open the chilled brine valve of condenser, again the logical chlorine valve on the reaction flask is opened with the speed of 0.7-0.9 gram/minute and carried out even introduce chlorine gas to make reaction (offgas duct is connected the hydrochloric acid that absorbs discharging with the alkali liquor absorption device), when reaction near 22 hours, stop introduce chlorine gas to make reaction, sampling detects, termination reaction when the density of reaction solution reaches 1.65-1.68 reaches till the above-mentioned density reaction solution otherwise continue logical chlorine.The reactant standing demix, oil reservoir is the product perchloro methyl-mercaptan, obtains flaxen liquid odorous 375.6 grams, content 97.0% (the GC thermal conductivity device is quantitative), yield 59.51%.
The same 1000ml four-hole bottle two covers (being divided into two reaction flasks of 1#, 2#) of loading onto with stirring, thermometer, condenser and logical chlorine device, the offgas duct of 1# reaction flask is connected (pounce on collection and reclaim dithiocarbonic anhydride and the chlorine that is partly dissolved in the dithiocarbonic anhydride) with the intubate that the 2# reaction flask is loaded onto, the hydrochloric acid tracheae that the 2# reaction flask is discharged is connected with alkali liquor absorption device pipe.
Reaction unit installs rear respectively at 1#, and the 2# reaction flask adds dithiocarbonic anhydride, the 200.0 gram (mass concentrations 30.0% of 252 grams (99.0%3.2826mol); 1.6438mol) hydrochloric acid, to open and stir, as the main reaction bottle, the 2# reaction flask is as the side reaction bottle the 1# reaction flask in elder generation.The fluid temperature of 1# main reaction bottle is raised to 25-30 ℃, the temperature of 2# side reaction bottle is controlled at 15-20 ℃, open the chilled brine valve of two reaction flask overhead condenser, logical chlorine valve on the 1# reaction flask opened with the speed of 0.7-0.9 gram/minute carry out even introduce chlorine gas to make reaction (tail gas alkali liquor absorption), 2# side reaction bottle graft ending gas is pounced on the collection dithiocarbonic anhydride that reclaims and the chlorine (dithiocarbonic anhydride can not have the chlorine of reaction to react with entering bottle) that is partly dissolved in the dithiocarbonic anhydride, when the 1# reaction flask reaction times near 22 hours, sampling detects, when the density of reaction solution reaches the 1.65-1.68 termination reaction, otherwise continue logical chlorine reaction solution is reached till the above-mentioned density.
Reaction finishes, and stops the stirring of two reaction flasks.The reaction solution of 2# side reaction bottle is prepared chlorination and is used.The reactant standing demix of 1# reaction flask, oil reservoir is the product perchloro methyl-mercaptan, obtains flaxen liquid odorous 380.66 grams, content 97.3% (the GC thermal conductivity device is quantitative), yield 60.5%.
It is constant to press embodiment two experimental installation methods, the pipe that the offgas duct of 2# reaction flask and 1# reaction flask are loaded onto is connected (pouncing on the collection dithiocarbonic anhydride that reclaims and the chlorine that is partly dissolved in the dithiocarbonic anhydride), and the hydrochloric acid tracheae of discharging at the 1# reaction flask is connected with alkali liquor absorption device bottom insert canal.
At the dithiocarbonic anhydride of 1# reaction flask adding 252 grams (99.0%3.2826mol), 200.0 gram (mass concentration 30.0%1.6438mol) hydrochloric acid are opened and are stirred.As the main reaction bottle, the 1# reaction flask is as the side reaction bottle the 2# reaction flask.The fluid temperature of 2# main reaction bottle is raised to 25-30 ℃, the temperature of 1# side reaction bottle is controlled at 15-20 ℃, open the chilled brine valve of the condenser of two reaction flask tops, logical chlorine valve on the 2# reaction flask opened with the speed of 0.7-0.9 gram/minute carry out even introduce chlorine gas to make reaction (tail gas alkali liquor absorption), 1# side reaction bottle graft ending gas is pounced on the collection dithiocarbonic anhydride that reclaims and the chlorine (dithiocarbonic anhydride can not have the chlorine of reaction to react with entering bottle) that is partly dissolved in the dithiocarbonic anhydride, when the 2# reaction flask reaction times near 22 hours, sampling detects, termination reaction when the density of reaction solution reaches 1.65-1.68 reaches till the above-mentioned density reaction solution otherwise continue logical chlorine.
Reaction finishes, and stops the stirring of two reaction flasks.The reaction solution of 1# side reaction bottle is prepared chlorination and is used.The reactant standing demix of 2# reaction flask, oil reservoir is the product perchloro methyl-mercaptan, obtains flaxen liquid odorous 589.9 grams, content 97.2% (the GC thermal conductivity device is quantitative), yield 93.9%.
It is constant to press embodiment three experimental installation methods, the bottom insert canal that the offgas duct of 1# reaction flask and 2# reaction flask are loaded onto is connected (pouncing on the collection dithiocarbonic anhydride that reclaims and the chlorine that is partly dissolved in the dithiocarbonic anhydride), and the hydrochloric acid tracheae of discharging at the 2# reaction flask connects with alkali liquor absorption device bottom insert canal.
At the dithiocarbonic anhydride of 2# reaction flask adding 252 grams (99.0%3.2826mol), 200.0 gram (mass concentrations 30.0%; 1.6438mol) hydrochloric acid, open and stir.As the main reaction bottle, the 1# reaction flask is as the side reaction bottle the 2# reaction flask.The fluid temperature of 1# main reaction bottle is raised to 25-30 ℃, the temperature of 2# side reaction bottle is controlled at 15-20 ℃, open the chilled brine valve of the condenser of two reaction flask tops, logical chlorine valve on the 1# reaction flask opened with the speed of 0.7-0.9 gram/minute carry out even introduce chlorine gas to make reaction (tail gas alkali liquor absorption), 2# side reaction bottle graft ending gas is pounced on the collection dithiocarbonic anhydride that reclaims and the chlorine (dithiocarbonic anhydride can not have the chlorine of reaction to react with entering bottle) that is partly dissolved in the dithiocarbonic anhydride, when the 1# reaction flask reaction times near 22 hours, sampling detects, termination reaction when the density of reaction solution reaches 1.65-1.68 reaches till the above-mentioned density reaction solution otherwise continue logical chlorine.
Reaction finishes, and stops the stirring of two reaction flasks.The reaction solution of 2# side reaction bottle is prepared chlorination and is used.The reactant standing demix of 1# reaction flask, oil reservoir is the product perchloro methyl-mercaptan, obtains faint yellow liquid odorous 598.3 grams, content 97.2% (the GC thermal conductivity device is quantitative), yield 95.0%.
Press embodiment two, the device parameter in laboratory has been installed zoom facility in the workshop and has been tested, and the result is as follows:
The 3000L chlorination reaction still that stirring, thermometer, condenser, logical chlorine device are housed at the same time is respectively two reactors of 1#, 2#, at 1#, the 2# reactor adds respectively 750 kilograms of (99.0%9.8478mol) dithiocarbonic anhydride (600L), 600.0 kilograms of (mass concentrations 30.0%; 4.9315mol) hydrochloric acid, to open and stir, as the main reaction still, 2# reactor 2 is as secondary reacting kettle 1# reactor 1 in elder generation.The fluid temperature of 1# main reaction still is raised to 25-30 ℃, the temperature of 2# secondary reacting kettle is controlled at 15-20 ℃, open the chilled brine valve of two reactor overhead condenser, logical chlorine valve on the 1# reactor opened with the speed of 2.0-2.5 kg/minute carry out even introduce chlorine gas to make reaction (tail gas enters absorption tower circulation and absorbs hydrochloric acid), 2# secondary reacting kettle 2 receives the dithiocarbonic anhydride of pouncing on collection and the chlorine (dithiocarbonic anhydride can react with the chlorine that does not have reaction) that is partly dissolved in the dithiocarbonic anhydride, when 1 reaction times of 1# reactor near 22-25 hour, sampling detects, termination reaction when the density of reaction solution reaches 1.65-1.68 reaches till the above-mentioned density reaction solution otherwise continue logical chlorine.
Reaction finishes, and stops the stirring of two reactors.The reaction solution of 2# secondary reacting kettle 2 is prepared the next chlorination reactor of deciding and is carried out chlorination reaction.The reactant standing demix of 1# reactor 1, oil reservoir are product perchloro methyl-mercaptan (PMM), obtain 1177.3 kilograms of flaxen liquid odorous, content 97.5% (the GC thermal conductivity device is quantitative), yield 62.5%.
Implementation method is imitated embodiment five, adds 750 kilograms of (99.0%9.8478mol) dithiocarbonic anhydride (600L), 600.0 kilograms of (mass concentrations 30.0% toward 1# reactor 1; 4.9315mol) hydrochloric acid.As the main reaction still, 1# reactor 1 is opened as secondary reacting kettle and is stirred 2# reactor 2.The fluid temperature of 2# main reaction still 2 is raised to 20-25 ℃, the temperature of 1# secondary reacting kettle 1 is controlled at 15-20 ℃, open the chilled brine valve of two reactor overhead condenser, logical chlorine valve on the 2# reactor 2 opened with the speed of 2.0-2.5 kg/minute carry out even introduce chlorine gas to make reaction (tail gas enters absorption tower circulation and absorbs hydrochloric acid), 1# secondary reacting kettle 1 receives the dithiocarbonic anhydride of pouncing on collection and the chlorine (dithiocarbonic anhydride can react with the chlorine that does not have reaction) that is partly dissolved in the dithiocarbonic anhydride, when 2 reaction times of 2# reactor near 22-25 hour, sampling detects, termination reaction when the density of reaction solution reaches 1.65-1.68 reaches till the above-mentioned density reaction solution otherwise continue logical chlorine.
Reaction finishes, and stops the stirring of two reactors.The reaction solution of 1# secondary reacting kettle 1 is prepared the next chlorination reactor of deciding and is carried out chlorination reaction.The reactant standing demix of 2# reactor 2, oil reservoir is the product perchloro methyl-mercaptan, obtains 1795.0 kilograms of flaxen liquid odorous, content 97.1% (the GC thermal conductivity device is quantitative), yield 94.9%.
Implementation method is imitated embodiment six, adds 750 kilograms of (99.0%9.8478mol) dithiocarbonic anhydride (600L), 600.0 kilograms of (mass concentrations 30.0% toward 2# reactor 2; 4.9315mol) hydrochloric acid.As the main reaction still, 2# reactor 2 is opened as secondary reacting kettle and is stirred 1# reactor 1.The fluid temperature of 1# main reaction still 1 is raised to 25-30 ℃, the temperature of 2# secondary reacting kettle 2 is controlled at 15-20 ℃, open the chilled brine valve of two reactor overhead condenser, logical chlorine valve on the 1# reactor 1 opened with the speed of 2.1-2.5 kg/minute carry out introduce chlorine gas to make reaction (tail gas enter absorption tower absorb hydrochloric acid), 2# secondary reacting kettle 2 receives the dithiocarbonic anhydride of pouncing on collection and the chlorine (dithiocarbonic anhydride can react with the chlorine that does not have reaction) that is partly dissolved in the dithiocarbonic anhydride, when 1 reaction times of 1# reactor near 22-25 hour, sampling detects, termination reaction when the density of reaction solution reaches 1.65-1.68 reaches till the above-mentioned density reaction solution otherwise continue logical chlorine.
Reaction finishes, and stops the stirring of two reactors.The reaction solution of 2# secondary reacting kettle 2 is prepared the next chlorination reactor of deciding and is carried out chlorination reaction.The reactant standing demix of 1# reactor 1, oil reservoir is the product perchloro methyl-mercaptan, obtains 1800.8 kilograms of flaxen liquid odorous, content 97.3% (the GC thermal conductivity device is quantitative), yield 95.4%.
Above-described embodiment is the better embodiment of the present invention; but embodiments of the present invention are not restricted to the described embodiments; other any do not deviate from change, the modification done under spirit of the present invention and the principle, substitutes, combination, simplify; all should be the substitute mode of equivalence, be included within protection scope of the present invention.
Claims (2)
1. method for preparing perchloro methyl-mercaptan is characterized in that may further comprise the steps:
(1) in two chlorination reaction stills, adds dithiocarbonic anhydride and hydrochloric acid, open and stir, open the chilled brine valve of two chlorination reaction still overhead condenser;
(2) the 1# still as chlorination reaction main reaction still, its temperature is controlled at 10-30 ℃, pass into chlorine and carry out chlorination reaction; The secondary reacting kettle of 2# reactor during as chlorination, the dithiocarbonic anhydride in the main reaction still and be dissolved in the chlorine that the reaction of not participating in the dithiocarbonic anhydride and cool down by condensing equipment and enter secondary reacting kettle, the temperature of secondary reacting kettle is controlled at 10-20 ℃;
(3) termination reaction when the density of 1# still reaction solution reaches 1.65-1.68 reaches till the above-mentioned density reaction solution otherwise continue logical chlorine; Finish reaction and stop to stir, the product standing demix, the upper strata is nitration mixture, lower floor is the product perchloro methyl-mercaptan;
(4) add dithiocarbonic anhydride and hydrochloric acid toward 1# chlorination reaction still again, then with this still as secondary reacting kettle, as the main reaction still, logical chlorine carries out chlorination reaction the 2# still; Two consecutive reaction stills so are used alternatingly recovery pounce on collection dithiocarbonic anhydride to finish the preparation of perchloro methyl-mercaptan.
2. described a kind of method for preparing perchloro methyl-mercaptan according to claim 1, it is characterized in that: the described adding dithiocarbonic anhydride in step (1) and (4) and hydrochloric acid, its mol ratio is 1: 0.3-1.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111233718A (en) * | 2020-03-19 | 2020-06-05 | 宁夏格瑞精细化工有限公司 | Method for continuously synthesizing perchloromethylmercaptan |
| CN111574415A (en) * | 2020-05-27 | 2020-08-25 | 山东阳谷华泰化工股份有限公司 | Synthetic method of perchloromethylmercaptan |
| CN111701447A (en) * | 2020-06-17 | 2020-09-25 | 山东潍坊润丰化工股份有限公司 | Absorption liquid for absorbing waste gas containing perchloromethylmercaptan and preparation method and application thereof |
| CN111909064A (en) * | 2020-07-29 | 2020-11-10 | 山东阳谷华泰化工股份有限公司 | Method for preparing perchloromethylmercaptan by using microchannel reactor |
| CN115353473A (en) * | 2022-07-21 | 2022-11-18 | 山东戴瑞克新材料有限公司 | Preparation process of perchloromethylmercaptan |
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2012
- 2012-04-06 CN CN 201210101219 patent/CN103360295A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111233718A (en) * | 2020-03-19 | 2020-06-05 | 宁夏格瑞精细化工有限公司 | Method for continuously synthesizing perchloromethylmercaptan |
| CN111233718B (en) * | 2020-03-19 | 2022-03-11 | 宁夏格瑞精细化工有限公司 | Method for continuously synthesizing perchloromethylmercaptan |
| CN111574415A (en) * | 2020-05-27 | 2020-08-25 | 山东阳谷华泰化工股份有限公司 | Synthetic method of perchloromethylmercaptan |
| CN111701447A (en) * | 2020-06-17 | 2020-09-25 | 山东潍坊润丰化工股份有限公司 | Absorption liquid for absorbing waste gas containing perchloromethylmercaptan and preparation method and application thereof |
| CN111909064A (en) * | 2020-07-29 | 2020-11-10 | 山东阳谷华泰化工股份有限公司 | Method for preparing perchloromethylmercaptan by using microchannel reactor |
| CN111909064B (en) * | 2020-07-29 | 2022-07-29 | 山东阳谷华泰化工股份有限公司 | Method for preparing perchloromethylmercaptan by using microchannel reactor |
| CN115353473A (en) * | 2022-07-21 | 2022-11-18 | 山东戴瑞克新材料有限公司 | Preparation process of perchloromethylmercaptan |
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Application publication date: 20131023 |