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Recovery and treatment process of acrylate waste oil

An acrylate and treatment process technology, applied in the field of acrylate waste oil recovery and treatment process, can solve problems such as being unfavorable to energy conservation, environmental protection, waste of energy, etc., and achieve the effects of reducing generation, reducing side reactions, and high purity

Inactive Publication Date: 2019-11-12
JIANGSU XINDONGFENG CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When acrylate is synthesized by direct esterification, the waste oil after recovery of acrylate contains a large amount of β-butoxy esters, dimers, and a small amount of esters and alcohols. The waste oil is directly discarded, which is a waste of energy. On the other hand, it is not conducive to energy saving and environmental protection

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A kind of acrylate waste oil recovery treatment process, comprises the following steps:

[0026] 1) Initial depolymerization, using acrylate waste oil as raw material, wherein acrylate waste oil contains butyl acrylate, acrylic acid, butanol, dibutyl ether, β-butoxy butyl propionate, β-butoxy propionate Acid, β-hydroxy butyl propionate and dimer, add 0.01% composite catalyst and 0.01% composite polymerization inhibitor in the raw material, composite catalyst adopts the composite catalyst of p-toluenesulfonic acid and methanesulfonic acid, wherein p-toluenesulfonic acid Sulphonic acid: toluenesulfonic acid is 1:1.5, and described composite polymerization inhibitor is the composite polymerization inhibitor of hydroquinone and ferric chloride, and wherein hydroquinone: ferric chloride is 1:1, will After the raw materials are heated to 200°C and kept warm, the pressure is controlled at -0.01Mpa to react for 10 hours. The reaction products include water, alcohols, acrylic ac...

Embodiment 2

[0029] A kind of acrylate waste oil recovery treatment process, comprises the following steps:

[0030] 1) Initial depolymerization, using acrylate waste oil as raw material, wherein acrylate waste oil contains butyl acrylate, acrylic acid, butanol, dibutyl ether, β-butoxy butyl propionate, β-butoxy propionate Acid, β-hydroxypropionate butyl and dimer, add 0.015% composite catalyst and 0.015% composite polymerization inhibitor in raw material, composite catalyst adopts the composite catalyst of p-toluenesulfonic acid and methanesulfonic acid, wherein p-toluenesulfonic acid Sulphonic acid: toluenesulfonic acid is 1:1.5, and described composite polymerization inhibitor is the composite polymerization inhibitor of hydroquinone and ferric chloride, and wherein hydroquinone: ferric chloride is 1:1, will After the raw materials are heated to 210°C and kept warm, the pressure is controlled at -0.03Mpa and reacted for 9 hours. The reaction products include water, alcohols, acrylic aci...

Embodiment 3

[0033] A kind of acrylate waste oil recovery treatment process, comprises the following steps:

[0034]1) Initial depolymerization, using acrylate waste oil as raw material, wherein acrylate waste oil contains butyl acrylate, acrylic acid, butanol, dibutyl ether, β-butoxy butyl propionate, β-butoxy propionate Acid, β-hydroxy butyl propionate and dimer, add 0.02% composite catalyst and 0.02% composite polymerization inhibitor in the raw material, composite catalyst adopts the composite catalyst of p-toluenesulfonic acid and methanesulfonic acid, wherein p-toluenesulfonic acid Sulphonic acid: toluenesulfonic acid is 1:1.5, and described composite polymerization inhibitor is the composite polymerization inhibitor of hydroquinone and ferric chloride, and wherein hydroquinone: ferric chloride is 1:1, will After the raw material is heated to 185°C and kept warm, the pressure is controlled at -0.05Mpa to react for 8 hours. After the reaction, the product includes water, alcohols, acr...

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Abstract

The invention discloses a recovery and treatment process of acrylate waste oil. The recovery and treatment process comprises the steps of primary depolymerization, extracting, secondary depolymerization, secondary extracting and acrylic acid extracting. According to the recovery and treatment process of the acrylate waste oil, through the joint effect of thermal depolymerization and ultrasonic depolymerization, the pyrolysis conversion rate of beta-butoxy ester and dimers in the acrylate waste oil can be increased, alcohols can be recovered in time so as to reduce side reactions of esterification, by adopting the treatment process, the acrylate waste oil can be recycled, raw materials are high in recycling rate and high in purity, and energy conservation and environment protection are facilitated.

Description

Technical field: [0001] The invention relates to the technical field of recovery and treatment of acrylate waste oil, in particular to a process for recovery and treatment of acrylate waste oil. Background technique: [0002] Acrylate is a colorless liquid, insoluble in water, but miscible in ethanol and ether. Acrylates are mainly used as organic synthesis intermediates, adhesives, and emulsifiers. Acrylate is harmful to health and can be absorbed through inhalation, ingestion and skin. Its vapor or mist can irritate the eyes, mucous membranes and respiratory tract. The symptoms of poisoning include burning sensation, coughing, wheezing, laryngitis, shortness of breath, headache, nausea and vomiting. When acrylate is synthesized by direct esterification, the waste oil after recovery of acrylate contains a large amount of β-butoxy esters, dimers, and a small amount of esters and alcohols. The waste oil is directly discarded, which is a waste of energy. On the other hand, ...

Claims

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Application Information

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IPC IPC(8): C07C29/74C07C31/12C07C51/42C07C57/07C07C67/48C07C69/54C07C29/00C07C51/377C07C67/327
CPCC07C29/00C07C29/74C07C51/377C07C51/42C07C67/327C07C67/48C07C31/12C07C57/04C07C69/54Y02P20/50
Inventor 周晓云
Owner JIANGSU XINDONGFENG CHEM TECH
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