CN102675192A - Continuous condensation process in production process of 2-vinylpyridine - Google Patents
Continuous condensation process in production process of 2-vinylpyridine Download PDFInfo
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- CN102675192A CN102675192A CN2011100557219A CN201110055721A CN102675192A CN 102675192 A CN102675192 A CN 102675192A CN 2011100557219 A CN2011100557219 A CN 2011100557219A CN 201110055721 A CN201110055721 A CN 201110055721A CN 102675192 A CN102675192 A CN 102675192A
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Abstract
The invention relates to a continuous condensation process in the production process of 2-vinylpyridine. The continuous condensation process in the production process of the 2-vinylpyridine is characterized by comprising the following steps: 2-methylpyridine and formaldehyde are thrown into a measuring tank and then conveyed to a preparation slot, enter a tubular preheater through the preparation slot, and arrive in a tubular reactor after being preheated, wherein the mass ratio of the 2-methylpyridine to the formaldehyde is 5:1. By adoption of the continuous feeding method, reaction time is shortened, electric power and steam are saved, yield and reaction yield are increased, byproducts are reduced, and environmental pollution is reduced because the byproducts are harmful to the environment.
Description
Technical field
The present invention relates to the continuous condensating technology in a kind of 2-vinyl pyridine production process, belong to chemical field.
Background technology
The purpose of condensation reaction is to produce 2-hydroxyethyl pyridine, and this is for producing the first step of 2-vinyl pyridine.Old technology: still reaction intermittently, produce a batch of material (about 6 tons), about 6-7 of cycle hour; Wherein, fed intake about 45-50 minute about 60-80 of TRT minute; About 60 minutes of blowing time, 180 ℃ of temperature of reaction, reaction yield about 93%; Produce 4% left and right sides by-product tar (high boiling material, this thing is waste, and is big to environmental protection pressure) during this time.
The old technological reaction time is long, and yield is low, and by product is many.
Summary of the invention
Not enough according to prior art, technical problem to be solved by this invention is: the continuous condensating technology in a kind of 2-vinyl pyridine production process is provided, and the PT is shortened in the reaction of continuous conduit formula, cuts down the consumption of energy.
The technical solution adopted for the present invention to solve the technical problems is: the continuous condensating technology in a kind of 2-vinyl pyridine production process is provided; It is characterized in that: behind 2-picoline and formaldehyde input test tank; Be transported to dosing vessel; Get into tubular preheater through dosing vessel, arrive tubular reactor after the preheating, wherein the mass ratio of 2-picoline and formaldehyde is 5: 1.
The temperature of described tubular reactor is 240～280 ℃.
The pressure of described tubular reactor is 5～7MPa.
Described 2-picoline and formaldehyde are continuously feeding.
Described tubular preheater temperature is 260～300 ℃, and pressure is 6～9MPa.
Described material-compound tank temperature is 200～250 ℃, and pressure is 3～7Mpa.
The preposition material-compound tank of this technology, continuously feeding then, successive reaction in tubular reactor, yield is more than 99%.Existing equipment flow determines according to equipment volume.
The invention has the beneficial effects as follows: through taking the mode of continuously feeding, shortened the reaction times, practiced thrift electric power and steam; Output and reaction yield have also been improved simultaneously; Reduced by product, wherein by product is very big to environmental hazard, and this has also reduced environmental pollution.
Description of drawings
Fig. 1 is a process flow sheet of the present invention;
1 is test tank among the figure; 2 is dosing vessel; 3 is tubular preheater; 4 is tubular reactor.
Embodiment
Below in conjunction with embodiment the present invention is described further.
Using the mass ratio of test tank 1 preparation 2-picoline and formaldehyde is 5: 1,200 ℃ of material-compound tank 2 temperature of charge, and pressure 3Mpa, inlet amount 150L/min, 260 ℃ of tubular preheater 3 temperature, pressure is 6Mpa.240 ℃ of tubular reactor 4 temperature, pressure is 5Mpa.245 ℃ of drop temperatures detected after 4 hours, and the 2-vinyl pyridine is 40%, and the 2-picoline is 58%, high boiling material 0.4%.Hydroxyl second output is 3.6 tons.
Using the mass ratio of test tank 1 preparation 2-picoline and formaldehyde is 5: 1,230 ℃ of material-compound tank 2 temperature of charge, and pressure 5Mpa, inlet amount 150L/min, 280 ℃ of tubular preheater 3 temperature, pressure is 8Mpa.260 ℃ of tubular reactor 4 temperature, pressure is 6Mpa.247 ℃ of drop temperatures detected after 4 hours, and the 2-vinyl pyridine is 39%, and the 2-picoline is 59%, high boiling material 0.5%.Hydroxyl second output is 3.7 tons.
Using the mass ratio of test tank 1 preparation 2-picoline and formaldehyde is 5: 1,250 ℃ of material-compound tank 2 temperature of charge, and pressure 7Mpa, inlet amount 150L/min, 300 ℃ of tubular preheater 3 temperature, pressure is 9Mpa.280 ℃ of tubular reactor 4 temperature, pressure is 7Mpa.243 ℃ of drop temperatures detected after 4 hours, and the 2-vinyl pyridine is 41%, and the 2-picoline is 57%, high boiling material 0.3%.Hydroxyl second output is 3.6 tons.
Claims (6)
1. the continuous condensating technology in the 2-vinyl pyridine production process; It is characterized in that: behind 2-picoline and formaldehyde input test tank; Be transported to dosing vessel; Get into tubular preheater through dosing vessel, arrive tubular reactor after the preheating, wherein the mass ratio of 2-picoline and formaldehyde is 5: 1.
2. the continuous condensating technology in the 2-vinyl pyridine production process according to claim 1, the temperature that it is characterized in that described tubular reactor is 240～280 ℃.
3. the continuous condensating technology in the 2-vinyl pyridine production process according to claim 1, the pressure that it is characterized in that described tubular reactor is 5～7MPa.
4. the continuous condensating technology in the 2-vinyl pyridine production process according to claim 1 is characterized in that described 2-picoline and formaldehyde are continuously feeding.
5. the continuous condensating technology in the 2-vinyl pyridine production process according to claim 1 is characterized in that described tubular preheater temperature is 260～300 ℃, and pressure is 6～9MPa.
6. the continuous condensating technology in the 2-vinyl pyridine production process according to claim 1 is characterized in that described material-compound tank temperature is 200～250 ℃, and pressure is 3～7Mpa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100557219A CN102675192A (en) | 2011-03-09 | 2011-03-09 | Continuous condensation process in production process of 2-vinylpyridine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100557219A CN102675192A (en) | 2011-03-09 | 2011-03-09 | Continuous condensation process in production process of 2-vinylpyridine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102675192A true CN102675192A (en) | 2012-09-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011100557219A Pending CN102675192A (en) | 2011-03-09 | 2011-03-09 | Continuous condensation process in production process of 2-vinylpyridine |
Country Status (1)
| Country | Link |
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| CN (1) | CN102675192A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104016905A (en) * | 2014-06-06 | 2014-09-03 | 江苏亚泰化工有限公司 | Method for preparing 2-vinylpyridine |
| CN111848500A (en) * | 2020-08-11 | 2020-10-30 | 李来旺 | Method for synthesizing 2-vinylpyridine |
-
2011
- 2011-03-09 CN CN2011100557219A patent/CN102675192A/en active Pending
Non-Patent Citations (1)
| Title |
|---|
| 赵鹬: "副产2-甲基吡啶合成2-乙烯基吡啶的工艺研究", 《南京工业大学学位论文》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104016905A (en) * | 2014-06-06 | 2014-09-03 | 江苏亚泰化工有限公司 | Method for preparing 2-vinylpyridine |
| CN111848500A (en) * | 2020-08-11 | 2020-10-30 | 李来旺 | Method for synthesizing 2-vinylpyridine |
| CN111848500B (en) * | 2020-08-11 | 2021-04-09 | 李来旺 | Method for synthesizing 2-vinylpyridine |
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Application publication date: 20120919 |