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Butyl acrylate monomer continuous production technology through discharging in tower

A technology for the production of butyl acrylate, which is applied in the preparation of carboxylic acid esters, organic chemistry, chemical instruments and methods, etc., can solve the problems of waste of water resources, aggravate the high-temperature cracking reaction of products, etc., increase production capacity and reduce the difficulty of rectification Effect

Inactive Publication Date: 2016-11-09
谦信化工集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, the above two continuous production processes all adopt the method of tower top discharge, which requires the operating conditions of the esterification tower to be controlled at relatively high operating pressure and / or relatively high temperature, and there is serious polymerization of the product under high temperature or high pressure conditions. Phenomena will also aggravate the high temperature cracking reaction of the product. At the same time, in order to slow down the impact of high temperature and high pressure on the product, it is necessary to control the cooling by feeding a large amount of water, and accordingly generate a large amount of waste water, resulting in serious of water waste

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] The invention discloses a continuous production process of butyl acrylate discharged from the tower. In the esterification tower, by controlling the reaction conditions at the top of the tower and the reaction conditions in the tower, the light components dibutyl ether, butyl acetate, butyl Alcohol is discharged from the top of the tower in azeotropic form, butyl acrylate is discharged from the tower, and heavy component butoxybutyl propionate is deposited at the bottom of the still; The reaction conditions at the top of the tower are: the operating pressure at the top of the tower is 3kpa, and the discharge position It is the 3rd plate, the tower top temperature is 30 ℃, the reflux ratio of the tower top ester phase is 0.5:1, and the water phase reflux ratio is 0.5:1; the reaction conditions in the tower are: the operating pressure in the tower is 6kpa, and the discharge position is On the 45th tray, the temperature in the tower is 62°C, the reflux ratio of the ester ph...

Embodiment 2

[0019] The invention discloses a continuous production process of butyl acrylate discharged from the tower. In the esterification tower, by controlling the reaction conditions at the top of the tower and the reaction conditions in the tower, the light components dibutyl ether, butyl acetate, butyl Alcohol is discharged from the top of the tower in azeotropic form, butyl acrylate is discharged from the tower, and heavy component butoxybutyl propionate is deposited at the bottom of the still; The reaction conditions at the top of the tower are: the operating pressure at the top of the tower is 2kpa, and the discharge position It is the first plate, the temperature at the top of the tower is 45°C, the reflux ratio of the ester phase at the top of the tower is 1:1, and the reflux ratio of the water phase is 2:1; the reaction conditions in the tower are: the operating pressure in the tower is 10kpa, and the discharge position is On the 38th tray, the temperature in the tower is 55°C...

Embodiment 3

[0022] The invention discloses a continuous production process of butyl acrylate discharged from the tower. In the esterification tower, by controlling the reaction conditions at the top of the tower and the reaction conditions in the tower, the light components dibutyl ether, butyl acetate, butyl Alcohol is discharged from the top of the tower in azeotropic form, butyl acrylate is discharged from the tower, and heavy component butoxybutyl propionate is deposited at the bottom of the still; The reaction conditions at the top of the tower are: the operating pressure at the top of the tower is 1kpa, and the discharge position It is the 5th plate, the tower top temperature is 38 ℃, the tower top ester phase reflux ratio is 2:1, and the water phase reflux ratio is 4:1; the reaction conditions in the tower are: the operating pressure in the tower is 8kpa, and the discharge position is On the 32nd tray, the temperature in the tower is 70°C, the reflux ratio of the ester phase in the ...

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PUM

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Abstract

The invention discloses a butyl acrylate monomer continuous production technology through discharging in tower. In an esterification tower, by controlling the tower top reaction condition and reaction condition in the tower, a light component is discharged from the tower top, the butyl acrylate monomer is discharged from the tower, a heavy component is precipitated at the bottom of a kettle; the tower top reaction condition is characterized in that the tower top operation pressure is 1 kpa-3 kpa, the discharging position is the 1st-5th plate, the tower top temperature is 30-45 DEG C, the ester phase reflux ratio at the tower top is 0.5: 1-2:1, and the water phase reflux ratio is 0.5:1-4:1; the reaction condition in the tower is characterized in that the operation pressure in the tower is 6 kpa-10 kpa, the discharging position is the 32th -45th plate, temperature in the tower is 55-70 DEG C, the ester phase reflux ratio in the tower top is 0.5: 1-2:1, and water phase reflux ratio is 0.5:1-4:1. The butyl acrylate monomer continuous production technology has the advantages of high product purity, water saving, strong process realizability, and low cost.

Description

technical field [0001] The invention relates to the technical field of butyl acrylate production, in particular to a continuous production process of butyl acrylate discharged from a tower. Background technique [0002] Butyl acrylate is an important organic chemical raw material and intermediate, because of its unique and highly active polar molecules, unsaturated double bonds, and carboxylic acid structure, it can react with a variety of compounds to undergo homopolymerization or copolymerization React, synthesize a series of polymers, and prepare plastic and cross-linked polymers through emulsion polymerization, solution polymerization, copolymerization and other processing methods. They have good weather resistance, UV resistance, water resistance, heat resistance and other characteristics. , elastomers, synthetic fibers, building materials, superabsorbent resins, ultraviolet / electron beam (UV / EB) curing, flocculants, additives, detergents and many other fields have show...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C67/08C07C67/54C07C69/54
CPCC07C67/08C07C67/54C07C69/54
Inventor 赵楚榜于冬娥王鹏
Owner 谦信化工集团有限公司