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Alcohol head polymerization purification preparation method

A technology of alcohol head and diethylene glycol, which is applied in the field of alcohol head polymerization, purification and preparation

Pending Publication Date: 2022-01-21
衢州建华南杭药业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the prior art, the yield of diethylene glycol monovinyl ether is 60%, so it is necessary to provide a kind of diethylene glycol monovinyl ether that reduces the by-product content and improves the yield of diethylene glycol monovinyl ether Preparation

Method used

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  • Alcohol head polymerization purification preparation method
  • Alcohol head polymerization purification preparation method

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Embodiment Construction

[0028] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0029] A kind of alcohol head polymerization purification preparation method, comprises the following steps:

[0030] (A) Add diethylene glycol and a prefabricated mixed solution of catalyst, polymerization inhibitor and stabilizer into the reactor.

[0031] The weight components of diethylene glycol, acetylene, and prefabricated mixed solution are as follows: 250-270 parts of diethylene glycol, 25-35 parts of acetylene, 8-9 parts of prefabricated mixed solution; preferably: 255-265 parts of diethylene glycol, 27 parts of acetylene -32 parts, 8.3-8.7 parts of prefabricated mixed solution.

[0032] In one embodiment, the weight components of diethylene glycol, acetylene, and prefabricated mixed solution are: 250 parts of diethylene glycol, 25 parts of acetylene, and 8 parts of prefabricated mixed solution; in one embodiment, diethylen...

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Abstract

The invention provides an alcohol head polymerization purification preparation method used for preparing C6 alcohol head diethylene glycol monovinyl ether. The preparation method comprises the following steps: performing sufficient polymerization reaction on diethylene glycol, a pre-prepared mixed solution and acetylene in a reaction kettle to obtain a reaction mixture, rectifying the reaction mixture through a primary rectifying tower and a secondary rectifying tower, and collecting a diether byproduct and C6 alcohol head diethylene glycol monovinyl ether by adjusting the reflux ratio. The purity of the obtained C6 alcohol head is 98% or above, and the C6 alcohol head is basically free of diether byproducts and reaches the delivery standard.

Description

technical field [0001] The invention belongs to the technical field of synthesis of diethylene glycol monovinyl ether, and in particular relates to a preparation method of alcohol head polymerization purification. Background technique [0002] At present, the domestic polyether macromonomer used for polycarboxylate superplasticizers is conservatively estimated at 1 million tons per year. According to the estimated consumption of 3% alcohol head, the domestic annual demand for alcohol head is 30,000 tons / year. At present, the alcohol heads used in the synthesis of polyether macromonomers are mainly methallyl alcohol (commonly known as C4 alcohol head) and 3-methyl-3-buten-1-ol (commonly known as C5 alcohol head), and the C4 alcohol head is mainly It is domestically produced, and the C5 alcohol head is mainly imported from Kuraray, Japan. At present, the actual production capacity of diethylene glycol monovinyl ether (commonly known as C6 alcohol head) in China is about 2,400...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C43/178C07C41/08C07C41/42
CPCC07C41/08C07C41/42C07C43/1785
Inventor 应青陈潜朱南军
Owner 衢州建华南杭药业有限公司
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