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Application of composite polymerization inhibitors in crylic acid refining process

A technology of composite polymerization inhibitor and acrylic acid, which is applied in the application field of composite polymerization inhibitor in the refining process of acrylic acid, can solve the problems that the polymerization inhibitor cannot achieve the polymerization inhibition effect, reduce equipment investment, improve the polymerization inhibition effect, and avoid chaotic effect

Inactive Publication Date: 2014-06-11
JILIN DESIGNING INST OF CNPC NORTHEAST REFINING & CHEM ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are too many types of polymerization inhibitors used in the prior art and all cannot achieve the desired polymerization inhibition effect of the process.

Method used

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  • Application of composite polymerization inhibitors in crylic acid refining process
  • Application of composite polymerization inhibitors in crylic acid refining process
  • Application of composite polymerization inhibitors in crylic acid refining process

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Embodiment Construction

[0021] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. All other embodiments obtained by persons of ordinary skill in the art based on the embodiments of the present invention belong to the protection scope of the present invention.

[0022] The composite polymerization inhibitor used in the application of the present invention is a composite polymerization inhibitor of nitrogen oxide free radical compound and copper salt. In some embodiments, the copper salt may include one of copper acrylate, copper acetate, or basic copper carbonate, or any combination thereof. The nitroxide radical type compound is 4-hydroxy-2,2,6,6-tetramethylpiperidine nitroxide radical (TEMPO). In some embodiments of the present invention, the mass...

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Abstract

The invention discloses application of composite polymerization inhibitors in a crylic acid refining process. The composite polymerization inhibitors comprise a nitroxide free radical compound and copper salt. The polymerization inhibition effect in the production process of the crylic acid can be effectively improved by application of the composite polymerization inhibitor disclosed by the invention in the crylic acid refining process. In addition, equipment investment also can be reduced by application of the composite polymerization inhibitor disclosed by the invention in the crylic acid refining process, the floor area of equipment is saved, and disorder of three polymerization inhibitors in the prior art is effectively avoided.

Description

technical field [0001] The invention relates to the field of acrylic acid refining, more specifically, the application of a designed composite polymerization inhibitor in the process of acrylic acid refining. Background technique [0002] Acrylic acid and its esters have a wide range of uses, so such media contain unsaturated carbon-carbon double bonds and carboxyl or ester groups, and the monomers are very active. Under the action of substances, it is easy to cause self-polymerization, blockage of equipment, pipelines or instruments, especially in high-temperature conditions such as rectification process, which is more serious, affecting the normal production and operation of the device, and there are certain safety hazards. Therefore, preventing the polymerization of acrylic acid and acrylate-based media is very critical and is an important link in the continuous production of acrylic acid and acrylates. [0003] There are generally four types of polymerization inhibitors...

Claims

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Application Information

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IPC IPC(8): C07C57/075C07C51/50C07C51/44
CPCC07C51/50C07C51/44C07C57/04
Inventor 代国兴刘利张凤涛张军滕大君张艳红娄喜营王乐天
Owner JILIN DESIGNING INST OF CNPC NORTHEAST REFINING & CHEM ENG