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Cracking recovery process of n-butyl acrylate heavy components

A technology of n-butyl acrylate and heavy components, which is applied in the preparation of carboxylate esters, chemical industry, carboxylate preparation, etc. It can solve the problems of difficult separation by conventional means, reduce equipment maintenance rate and maintenance cost, and reduce energy consumption and material consumption, improve the effect of cracking rate and recovery rate

Inactive Publication Date: 2019-10-25
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

[0007] However, under high temperature conditions, n-butyl ester is prone to condensation reaction to form dibutyl ether (DBE) with a boiling point of 142.2°C. Since it is relatively close to the boiling point of n-butyl acrylate (147.4°C), it is difficult to separate it by conventional means.

Method used

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  • Cracking recovery process of n-butyl acrylate heavy components

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Embodiment 1

[0036] The invention discloses a process for cracking and recovering the heavy component of n-butyl acrylate, which comprises the following steps: in the synthesis process of producing n-butyl acrylate with acrylic acid and n-butanol as raw materials, refining the n-butyl acrylate to the tower bottom component Put it into the bottom of the cracking kettle, add acrylic acid, catalyst, polymerization inhibitor, water in the cracking kettle at the same time, recover n-butyl acrylate from the top of the cracking kettle after cracking and discharge it into the recovery tower, the top of the recovery tower is mixed with n-butyl acrylate The reaction kettle is connected to realize the recombination and splitting of n-butyl acrylate, and then enters the esterification section to participate in the reaction and realize recovery; the cracking kettle includes a cracking section and a recovery section; the reaction conditions of the cracking section are: the operating temperature is 180°C, ...

Embodiment 2

[0044] The invention discloses a process for cracking and recovering the heavy component of n-butyl acrylate, which comprises the following steps: in the synthesis process of producing n-butyl acrylate with acrylic acid and n-butanol as raw materials, refining the n-butyl acrylate to the tower bottom component Put it into the bottom of the cracking kettle, add acrylic acid, catalyst, polymerization inhibitor, water in the cracking kettle at the same time, recover n-butyl acrylate from the top of the cracking kettle after cracking and discharge it into the recovery tower, the top of the recovery tower is mixed with n-butyl acrylate The reaction kettle is connected to realize the recombination and splitting of n-butyl acrylate, and then enters the esterification section to participate in the reaction and realize recovery; the cracking kettle includes a cracking section and a recovery section; the reaction conditions of the cracking section are: the operating temperature is 160°C, ...

Embodiment 3

[0052] The invention discloses a process for cracking and recovering the heavy component of n-butyl acrylate, which comprises the following steps: in the synthesis process of producing n-butyl acrylate with acrylic acid and n-butanol as raw materials, refining the n-butyl acrylate to the tower bottom component Put it into the bottom of the cracking kettle, add acrylic acid, catalyst, polymerization inhibitor, water in the cracking kettle at the same time, recover n-butyl acrylate from the top of the cracking kettle after cracking and discharge it into the recovery tower, the top of the recovery tower is mixed with n-butyl acrylate The reaction kettle is connected to realize the recombination and splitting of n-butyl acrylate, and then enters the esterification section to participate in the reaction and realize recovery; the cracking kettle includes a cracking section and a recovery section; the reaction conditions of the cracking section are: the operating temperature is 140°C, ...

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Abstract

The invention discloses a cracking recovery process of n-butyl acrylate heavy components. The cracking recovery process of the n-butyl acrylate heavy components comprises the following steps that in asynthesis process of n-butyl acrylate produced from acrylic acid and n-butanol, the bottom components of a n-butyl acrylate refining tower are injected into the bottom of a cracking reactor, meanwhile, acrylic acid, a catalyst, a polymerization inhibitor and water are added into the cracking reactor, and after cracking is carried out, the n-butyl acrylate is recovered from the top of the crackingreactor and is discharged into a recovery tower, and the top of the recovery tower communicates with the n-butyl acrylate reactor to realize the cracking of the n-butyl acrylate heavy components, then the n-butyl acrylate enters an esterification section to participate in the reaction, and the recovery is realized. The cracking recovery process of the n-butyl acrylate heavy components has the characteristics of high cracking efficiency of the n-butyl acrylate heavy components, high recovery of n-butanol and n-butyl acrylate and low material consumption and energy consumption cost.

Description

technical field [0001] The invention relates to the technical field of n-butyl acrylate preparation technology, in particular to a cracking recovery process of n-butyl acrylate heavy components. Background technique [0002] At present, the domestic production capacity of n-butyl acrylate is increasing year by year, and the product yield has become an urgent problem to be solved. The main factors affecting the product yield are the control of the conversion rate of the reactor, the selectivity and the control of the recovery rate of the recombination cracking. Strengthening the control of the above aspects can effectively improve the yield of products and reduce the consumption of raw and auxiliary materials. In the production process of n-butyl acrylate using acrylic acid and n-butanol as raw materials through reaction, extraction, rectification and other means, the main by-products are reorganized into butoxybutyl propionate (BPB), and the Part of the substance can be re...

Claims

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Application Information

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IPC IPC(8): C07C67/327C07C67/24C07C69/54C07C51/353C07C57/04
CPCC07C51/353C07C67/24C07C67/327C07C69/54C07C57/04Y02P20/50
Inventor 王鹏李庭忠胡兆雄于冬娥佟刚
Owner 谦信化工集团有限公司
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