CN102285902A - Chlorination process method for production tower of para-cyanobenzyl chloride (ortho-cyanobenzyl chloride) - Google Patents
Chlorination process method for production tower of para-cyanobenzyl chloride (ortho-cyanobenzyl chloride) Download PDFInfo
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- CN102285902A CN102285902A CN2010102015520A CN201010201552A CN102285902A CN 102285902 A CN102285902 A CN 102285902A CN 2010102015520 A CN2010102015520 A CN 2010102015520A CN 201010201552 A CN201010201552 A CN 201010201552A CN 102285902 A CN102285902 A CN 102285902A
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Abstract
The invention discloses a chlorination process method for a production tower of para-cyanobenzyl chloride (ortho-cyanobenzyl chloride), and belongs to the technical field of fine chemical engineering. In the chlorination step of the method, the prepared ortho-methylbenzonitrile continuously enters a chlorination tower through a feed port; chlorine gas continuously enters the chlorination tower through a gas inlet and flows from bottom to top to contact with the ortho-methylbenzonitrile; the chlorinated ortho-methylbenzonitrile is discharged through a discharge port on the lower part of the chlorination tower; and the chlorine gas is discharged through a gas outlet on the upper part of the chlorination tower. The invention provides the chlorination process method for the production tower of the para-cyanobenzyl chloride (ortho-cyanobenzyl chloride), which has the advantages of continuously and uninterruptedly performing the reaction and improving working environment of workers, along with high raw material utilization rate, high yield and safety in production during production of the para-cyanobenzyl chloride (ortho-cyanobenzyl chloride).
Description
Technical field
The present invention relates to (neighbour) cyano group benzyl chloride is produced tower chloridization process method, belong to the fine chemical technology field.
Background technology
It is the integral part of Technology innovation transformation project in the whole phenylformic acid series product that (neighbour) cyano group benzyl chloride Technology is occurred, traditional production method adopts the enamel reaction still reflection, there is following defective: 1) input and output material intermittently, can cause reactor to cold and heat succeed each other during input and output material, can have a strong impact on the work-ing life of enamel still like this, often exchange device more brings the cost height; 2) time of chlorination reaction shorter, react insufficient, cause the chlorine gas concentration in the tail gas higher, bring the chlorine consumption big; 3) time of chlorination reaction shorter, chlorine is taken away benzene nitrile raw material easily, brings the raw material consumption height, the output yield is low; 4) will do twice crystallization from producing finished product, use dissolution with solvents then, with whizzer product separation be come out, not only need a large amount of employee's operations, environment is abominable, and human body is caused very big injury; 5) owing to need use solvent cleaning, solvent evaporates is very fast, influences environment, and the production cost height, and the solvent after washing then needs rectifying that solvent is steamed recovery, and the even more serious solvent (inflammable substance) that is to use exists potential explosion safety danger; 6) centrifugally laggardly want a step vacuum-drying desolvate to remove, this process has greater environmental impacts, and environment is polluted; What 7) production equipment all adopted is manual operation, Artificial Control, and security risk is bigger, and each raw material ratio is difficult to control, influences the output and the quality of product.
Summary of the invention
The present invention is directed to above-mentioned defective, it is a kind of in the production process to (neighbour) cyano group benzyl chloride that purpose is to provide, its reaction can continuous, continual carrying out, make the raw material availability height, output is big and can keep the safety in production, improve the working environment of workers to (neighbour) cyano group benzyl chloride production tower chloridization process method.
Technical scheme of the present invention is: the present invention is undertaken by following processing step:
1) ammonification: put into o-methyl-benzene acid in the reactor and feed ammonia, the reacting by heating still makes o-methyl-benzene acid ammonification;
2) rectifying: the o-methyl-benzene acid rectifying to above-mentioned ammonification, get adjacent toluic nitrile, standby;
3) chlorination: the adjacent toluic nitrile that will make enters the chlorination tower continuously by opening for feed, chlorine enters the chlorination tower continuously by inlet mouth, chlorine flows from bottom to top and contacts with adjacent toluic nitrile, and the adjacent toluic nitrile after the chlorination is discharged by the discharge port of chlorination tower bottom, and chlorine is discharged by the air outlet on top.
Described air outlet and inlet mouth are communicated with, and make the chlorine circulation cycle.
Described inlet mouth circumferentially is distributed on chlorination tower periphery.
Each process of described technology adopts automatization control.
Advantage of the present invention is: temperature maintenance is stable in the 1) continuous feeding and discharging, tower, can not do the weakness that has overcome the former like this because of temperature variation causes damage to equipment; 2) continuous chlorination process using chlorination tower reaction, chlorine reaction is comparatively abundant, and chlorine gas concentration is very low in the tail gas, and the chlorine consumption is descended significantly; 3) the continuous chlorination technology chlorating time long, the chlorine of discharge can not taken away benzene nitrile raw material, helps reducing raw materials consumption; 4) the totally-enclosed production of continuous chlorination process using, simple to operate, owing to be automatic production control, labor cost is low, and Working environment can be greatly improved; 5) continuous chlorination technology avoids using solvent, and operating environment is improved, and production cost can descend more than 3%; 6) continuous chlorination technology is not owing to exist the use solvent, so, not only the solvent distillation device to be removed, more do not exist solvent distillation to recycle problem; 7) continuous chlorination technology is not being used the solvent inflammable substance, thereby is being made production safer; 9) adopt continuous chlorination technology, will directly arrive the slicing machine section after the product rectifying, packing does not need drying, can not influence environment; 10) production equipment adopts complete monitoring, and automatically unloading is reported to the police automatically, the automatization control device, and security risk descends significantly.
Adopt this technology, after testing, every economic and technical norms all produce huge variation: the one, and product yield brings up to 68.2% by 63.6%, increase by 4.6 percentage points: the 2nd, product content brings up to 99.4% by 98%, improve 1.4 percentage points: the 3rd, unit product mark consumption of coal is by former 900KG/T, decline 720KG/T: power consumption is by former 1350 degree/T, and 1200 degree/T descend: the 4th, and the off gas treatment rate brings up to 80.5% by former 61.2%, improves 19.3 percentage points.Estimate the whole year and save material 207 tons, save 630 tons in mark coal, 52.5 ten thousand degree that economize on electricity reduce 30 tons of sulphur dioxide emission, reduce waste gas discharge capacity 4,000 ten thousand marks cube, are 3,010,000 yuan of the newly-increased economic benefits of enterprise.
Embodiment
The present invention is undertaken by following processing step:
1) ammonification: put into o-methyl-benzene acid in the reactor and feed ammonia, the reacting by heating still makes o-methyl-benzene acid ammonification;
2) rectifying: the o-methyl-benzene acid rectifying to above-mentioned ammonification, get adjacent toluic nitrile, standby;
3) chlorination: the adjacent toluic nitrile that will make enters the chlorination tower continuously by opening for feed, chlorine enters the chlorination tower continuously by inlet mouth, chlorine flows from bottom to top and contacts with adjacent toluic nitrile, and the adjacent toluic nitrile after the chlorination is discharged by the discharge port of chlorination tower bottom, and chlorine is discharged by the air outlet on top.
Described air outlet and inlet mouth are communicated with, and make the chlorine circulation cycle.
Described inlet mouth circumferentially is distributed on chlorination tower periphery.
Each process of described technology adopts automatization control.
Claims (4)
1. (neighbour) cyano group benzyl chloride is produced tower chloridization process method, it is characterized in that, undertaken by following processing step:
1) ammonification: put into o-methyl-benzene acid in the reactor and feed ammonia, the reacting by heating still makes o-methyl-benzene acid ammonification;
2) rectifying: the o-methyl-benzene acid rectifying to above-mentioned ammonification, get adjacent toluic nitrile, standby;
3) chlorination: the adjacent toluic nitrile that will make enters the chlorination tower continuously by opening for feed, chlorine enters the chlorination tower continuously by inlet mouth, chlorine flows from bottom to top and contacts with adjacent toluic nitrile, and the adjacent toluic nitrile after the chlorination is discharged by the discharge port of chlorination tower bottom, and chlorine is discharged by the air outlet on top.
2. according to claim 1 to (neighbour) cyano group benzyl chloride production tower chloridization process method, it is characterized in that described air outlet and inlet mouth are communicated with, and make the chlorine circulation cycle.
3. according to claim 1 and 2 to (neighbour) cyano group benzyl chloride production tower chloridization process method, it is characterized in that described inlet mouth circumferentially is distributed on chlorination tower periphery.
4. according to claim 1 to (neighbour) cyano group benzyl chloride production tower chloridization process method, each process of described technology adopts automatization control.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102015520A CN102285902A (en) | 2010-06-17 | 2010-06-17 | Chlorination process method for production tower of para-cyanobenzyl chloride (ortho-cyanobenzyl chloride) |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102015520A CN102285902A (en) | 2010-06-17 | 2010-06-17 | Chlorination process method for production tower of para-cyanobenzyl chloride (ortho-cyanobenzyl chloride) |
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| Publication Number | Publication Date |
|---|---|
| CN102285902A true CN102285902A (en) | 2011-12-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010102015520A Pending CN102285902A (en) | 2010-06-17 | 2010-06-17 | Chlorination process method for production tower of para-cyanobenzyl chloride (ortho-cyanobenzyl chloride) |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107827703A (en) * | 2017-11-21 | 2018-03-23 | 南京钟腾化工有限公司 | A kind of method and device of tower continuous chlorination production dichlorotoleune |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3341439A (en) * | 1963-11-23 | 1967-09-12 | Chemische Werke Witten Gmbh | Photochemical process for the preparation of chloride derivatives of paratolunitrile |
| CN1156721A (en) * | 1995-11-21 | 1997-08-13 | 弗·哈夫曼-拉罗切有限公司 | Process for manufacturing nitriles |
| CN1210852A (en) * | 1997-08-06 | 1999-03-17 | 东丽株式会社 | Process for producing nitrile |
| CN201169578Y (en) * | 2007-11-12 | 2008-12-24 | 扬州市刘氏化工有限公司 | Heating ammonia charging apparatus in o-tolunitrile production |
-
2010
- 2010-06-17 CN CN2010102015520A patent/CN102285902A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3341439A (en) * | 1963-11-23 | 1967-09-12 | Chemische Werke Witten Gmbh | Photochemical process for the preparation of chloride derivatives of paratolunitrile |
| CN1156721A (en) * | 1995-11-21 | 1997-08-13 | 弗·哈夫曼-拉罗切有限公司 | Process for manufacturing nitriles |
| CN1210852A (en) * | 1997-08-06 | 1999-03-17 | 东丽株式会社 | Process for producing nitrile |
| CN201169578Y (en) * | 2007-11-12 | 2008-12-24 | 扬州市刘氏化工有限公司 | Heating ammonia charging apparatus in o-tolunitrile production |
Non-Patent Citations (3)
| Title |
|---|
| 李树安等: "光氯化法制造邻氰基氯苄中试工艺研究", 《精细化工中间体》 * |
| 禹荣等: "氯化塔的几点改进", 《中国氯碱》 * |
| 窦道华等: "采用连续生产工艺进行氯化苄扩产改造", 《中国氯碱》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107827703A (en) * | 2017-11-21 | 2018-03-23 | 南京钟腾化工有限公司 | A kind of method and device of tower continuous chlorination production dichlorotoleune |
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Application publication date: 20111221 |