CN104829441A - Anti-coking agent for distillation of benzaldehyde - Google Patents
Anti-coking agent for distillation of benzaldehyde Download PDFInfo
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- CN104829441A CN104829441A CN201410208937.8A CN201410208937A CN104829441A CN 104829441 A CN104829441 A CN 104829441A CN 201410208937 A CN201410208937 A CN 201410208937A CN 104829441 A CN104829441 A CN 104829441A
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- coking
- benzaldehyde
- distillation
- phenyl aldehyde
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Abstract
The invention provides an anti-coking agent for distillation of benzaldehyde, which is composed of following raw materials, by weight: 3-5% of pyridine, 15-20% of imidazole, 5-10% of thiazole, 15-30% of quinoline, 10-20% of furan and the balanced being pryimidine. The anti-coking agent is added into a benzaldehyde distillation still during a purification and rectification process of the benzaldehyde with addition concentration being not more than 100 ppm. The anti-coking agent can effectively prevent a coking problem during the distillation of the benzaldehyde. During the purification and rectification process of the benzaldehyde, by-products generated in distillation can be reduced and polymerization of the benzaldehyde at the bottom of the distillation still can be inhibited, thereby improving scaling problem in the distillation still, preventing generation of coking products and improving the yield of benzaldehyde by about 20%.
Description
Technical field
The present invention relates to chemical technology field, a kind of phenyl aldehyde distillation anti-coking agent particularly used in phenyl aldehyde purification rectifying.
Background technology
In phenyl aldehyde production process, the purification of phenyl aldehyde is completed by rectifying, in rectifying, because material is subject to high temperature, chlorion, the impact of the serial factor such as iron, the polymerization coking of phenyl aldehyde can be caused, phenyl aldehyde yield is caused to decline, at the bottom of still kettle, also can produce a large amount of dark-brown organic polymer simultaneously, these polymkeric substance are burnt bodies that impurity polymerization is formed, have not yet to see result of study to show, the burnt body that the purification of phenyl aldehyde produces can have suitable purposes, if and by external for Jiao row, then can cause huge environmental protection pressure to environment, and up to now, have no the result of study effectively preventing phenyl aldehyde from distilling coking this respect.
Summary of the invention
The object of this invention is to provide a kind of a kind of anti-coking agent adding use when phenyl aldehyde distills, solve in phenyl aldehyde production process and distill coking problem.
In order to achieve the above object, the invention provides following technical scheme:
The agent of a kind of phenyl aldehyde distillation anti-coking, is made up of the raw material of following weight ratio:
Pyridine 3-5%, imidazoles 15-20%, thiazole 5-10%, quinoline 15-30%, furans 10-20%, surplus is pyrimidine.
The preferred version of technique scheme, the agent of a kind of phenyl aldehyde distillation anti-coking, be made up of the raw material of following weight ratio: pyridine 3-4%, imidazoles 15-18%, thiazole 6-10%, quinoline 15-28%, furans 10-15%, surplus is pyrimidine.
The preferred version of technique scheme, the agent of a kind of phenyl aldehyde distillation anti-coking, be made up of the raw material of following weight ratio: pyridine 3-4.5%, imidazoles 16-18%, thiazole 5-8%, quinoline 18-28%, furans 12-18%, surplus is pyrimidine.
The preferred version of technique scheme, the agent of a kind of phenyl aldehyde distillation anti-coking, be made up of the raw material of following weight ratio: pyridine 3-3.5%, imidazoles 15-18%, thiazole 5-7%, quinoline 15-25%, furans 15-30%, surplus is pyrimidine.
The preferred version of technique scheme, the agent of a kind of phenyl aldehyde distillation anti-coking, be made up of the raw material of following weight ratio: pyridine 4-5%, imidazoles 15-18%, thiazole 6-8%, quinoline 20-28%, furans 10-16%, surplus is pyrimidine.
The preferred version of technique scheme, the agent of a kind of phenyl aldehyde distillation anti-coking, be made up of the raw material of following weight ratio: pyridine 4-4.5%, imidazoles 16-18%, thiazole 6-9%, quinoline 22-28%, furans 14-18%, surplus is pyrimidine.
The preferred version of technique scheme, the agent of a kind of phenyl aldehyde distillation anti-coking, be made up of the raw material of following weight ratio: pyridine 3.5-4%, imidazoles 16-19%, thiazole 6-8%, quinoline 25-29%, furans 14-16%, surplus is pyrimidine.
The preferred version of technique scheme, the agent of a kind of phenyl aldehyde distillation anti-coking, be made up of the raw material of following weight ratio: pyridine 3-4%, imidazoles 18-20%, thiazole 5-7%, quinoline 26-30%, furans 10-14%, surplus is pyrimidine.
The making method of phenyl aldehyde distillation anti-coking of the present invention agent: under normal temperature and pressure conditions, described pyrimidine and furans are obtained mixing solutions, again imidazoles is mixed with aforementioned mixing solutions, add quinoline again, stir, finally add pyridine and thiazole, stirring at normal temperatures gets product.
The present invention joins in phenyl aldehyde still kettle in phenyl aldehyde purification rectifying, add concentration and be less than 100PPM, phenyl aldehyde still-process can be effectively stoped to produce coking phenomenon, in phenyl aldehyde purification rectifying, the by product that distillation produces can be reduced, stop polymerization at the bottom of the still kettle of phenyl aldehyde, improve the fouled condition of still kettle, prevent the generation of coking product, improve the output capacity about 20% of phenyl aldehyde.
Embodiment
Below in conjunction with embodiment, be clearly and completely described technical scheme of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
Embodiment one: the agent of a kind of phenyl aldehyde distillation anti-coking, be made up of the raw material of following weight ratio: pyridine 3%, imidazoles 15%, thiazole 5%, quinoline 15%, furans 20%, pyrimidine is 42%.
Embodiment two: the agent of a kind of phenyl aldehyde distillation anti-coking, be made up of the raw material of following weight ratio: pyridine 4%, imidazoles 18%, thiazole 6%, quinoline 28%, furans 15%, pyrimidine is 29%.
Embodiment three: the agent of a kind of phenyl aldehyde distillation anti-coking, be made up of the raw material of following weight ratio: pyridine 4.5%, imidazoles 16%, thiazole 5%, quinoline 18%, furans 12%, pyrimidine is 44.5%.
Embodiment four: the agent of a kind of phenyl aldehyde distillation anti-coking, be made up of the raw material of following weight ratio: pyridine 3.5%, imidazoles 15%, thiazole 7%, quinoline 15%, furans 15%, pyrimidine is 44.5%.
Embodiment five: the agent of a kind of phenyl aldehyde distillation anti-coking, be made up of the raw material of following weight ratio: pyridine 4%, imidazoles 18%, thiazole 6%, quinoline 28%, furans 16%, pyrimidine is 28%.
Embodiment six: the agent of a kind of phenyl aldehyde distillation anti-coking, be made up of the raw material of following weight ratio: pyridine 5%, imidazoles 15%, thiazole 8%, quinoline 25%, furans 15%, pyrimidine is 32%.
Embodiment seven: the agent of a kind of phenyl aldehyde distillation anti-coking, be made up of the raw material of following weight ratio: pyridine 3.5%, imidazoles 19%, thiazole 6%, quinoline 29%, furans 14%, pyrimidine is 28.5%.
Embodiment eight: the agent of a kind of phenyl aldehyde distillation anti-coking, be made up of the raw material of following weight ratio: pyridine 4%, imidazoles 18%, thiazole 6%, quinoline 30%, furans 14%, pyrimidine is 28%.
Embodiment nine: the raw material of the weight ratio of phenyl aldehyde distillation anti-coking agent described in embodiment 1-8 is ready to, still kettle is the glassed steel reaction vessels of 500ml, described pyrimidine is mixed with furans, in glassed steel reaction vessels, fully mixing is dissolved under normal temperature and pressure, obtain mixed solution, time about 20min; Mixed in glass reaction still with aforementioned mixing solutions by imidazoles, then add quinoline, stir, the about 40min of churning time, mixing speed is 20-40r.p.m, finally adds pyridine and thiazole, and stirring at normal temperatures gets product.
Anti-coking agent effect is distilled for checking phenyl aldehyde of the present invention, contriver carries out test of many times in Wuhan Yuan Cheng Chemical Co., Ltd., in test, throw raw material 350kg crude product in still kettle, distillation pressure: 2.63 × 103Pa, positive cut boiling point 78 DEG C, add the phenyl aldehyde distillation anti-coking agent 30g described in example 8, obtain phenyl aldehyde finished product 309kg, under equivalent assay conditions, do not add anti-coking agent of the present invention, obtain phenyl aldehyde finished product 254kg.
The above; be only the specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, is anyly familiar with those skilled in the art in the technical scope that the present invention discloses; change can be expected easily or replace, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should described be as the criterion with the protection domain of claim.
Claims (1)
1. a phenyl aldehyde distillation anti-coking agent, is characterized in that: be made up of the raw material of following weight ratio:
Pyridine 3-5%, imidazoles 15-20%, thiazole 5-10%, quinoline 15-30%, furans 10-20%, surplus is pyrimidine;
Under normal temperature and pressure conditions, described pyrimidine and furans are obtained mixing solutions, then mixed with aforementioned mixing solutions by imidazoles, then add quinoline, stir, finally add pyridine and thiazole, stirring at normal temperatures gets product.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410208937.8A CN104829441B (en) | 2014-05-16 | 2014-05-16 | The agent of a kind of phenyl aldehyde distillation anti-coking |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410208937.8A CN104829441B (en) | 2014-05-16 | 2014-05-16 | The agent of a kind of phenyl aldehyde distillation anti-coking |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104829441A true CN104829441A (en) | 2015-08-12 |
| CN104829441B CN104829441B (en) | 2016-04-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410208937.8A Expired - Fee Related CN104829441B (en) | 2014-05-16 | 2014-05-16 | The agent of a kind of phenyl aldehyde distillation anti-coking |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102585963A (en) * | 2012-02-08 | 2012-07-18 | 广东电网公司电力科学研究院 | Biomass boiler anti-coking agent with porous membrane structure and preparation method thereof |
| CN103013617A (en) * | 2013-01-08 | 2013-04-03 | 华北电力大学 | Industrial residue boiler anti-coking agent and application method thereof |
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2014
- 2014-05-16 CN CN201410208937.8A patent/CN104829441B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102585963A (en) * | 2012-02-08 | 2012-07-18 | 广东电网公司电力科学研究院 | Biomass boiler anti-coking agent with porous membrane structure and preparation method thereof |
| CN103013617A (en) * | 2013-01-08 | 2013-04-03 | 华北电力大学 | Industrial residue boiler anti-coking agent and application method thereof |
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| CN104829441B (en) | 2016-04-27 |
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