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Cyclic polyether diester and preparation method thereof, and application of catalyst

A polyether diester and catalyst technology, applied in the field of polyether diester, can solve the problems of prolonging the reaction cycle and increasing production costs, and achieve the effect of high yield and simple process flow

Active Publication Date: 2020-06-16
LIAONING OXIRANCHEM INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003]Because the boiling point of polyether is usually higher than the boiling point of acid or ester, when controlling the reaction direction, the acid or ester is often selected in excess. If it is necessary to recover the acid and ester after the reaction For reuse, it is necessary to add a separation unit to separate the product and the acid (ester), thereby prolonging the reaction cycle and increasing the production cost

Method used

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  • Cyclic polyether diester and preparation method thereof, and application of catalyst
  • Cyclic polyether diester and preparation method thereof, and application of catalyst
  • Cyclic polyether diester and preparation method thereof, and application of catalyst

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preparation example Construction

[0033] In one embodiment, the preparation method of the cyclic polyether diester includes: adding cyclic anhydride to the reaction kettle, then adding the catalyst, sealing the reaction kettle, performing air tightness testing, and replacing it with nitrogen 3 to 5 times after passing the test. , And then began to heat up. After the temperature was raised to 140°C, a small amount of ethylene oxide was passed into the reactor. After the pressure dropped and the temperature rose, the remaining ethylene oxide was continuously passed in, and the reaction temperature was controlled at 150-170°C. After the reaction is over, continue to mature for 30-50 minutes, cool to 70°C, and take out the materials.

[0034] One embodiment of the present invention uses acid anhydride as an initiator through a one-step method, and obtains a cyclic polyether diester through an ethoxylation reaction under the action of a specific catalyst. The synthesis process is short, the production cost is low, and ...

Embodiment 1

[0055] Add 148g of phthalic anhydride to the reaction kettle, and then add 0.18g of Mg-Al oxide with a molar ratio of Mg / Al of 2:1, seal the reaction kettle, and replace it with nitrogen for 3 to 5 times after passing the air tightness test , And then began to heat up. After the temperature was raised to 140°C, 5g of ethylene oxide was introduced. After the pressure dropped and the temperature rose, 83g of ethylene oxide was continuously introduced, and the reaction temperature was controlled at 150-170°C and the reaction pressure was 0.1-0.5MPa. After the reaction is over, continue to mature for 30-50 minutes, lower the temperature to 70°C, take out the materials, and weigh the mass of the materials to 234.5g. The hydroxyl value and acid value of the test sample are both 0, which proves that there are no hydroxyl and carboxyl groups in the sample, and the synthesized sample can be judged to be the target sample. The saponification value of the product was detected. The saponif...

Embodiment 2

[0057] Add 148g of phthalic anhydride to the reaction kettle, then add 0.22g of Mg-Al oxide with a molar ratio of Mg / Al of 1:1, seal the reaction kettle, and after passing the air tightness test, replace it with nitrogen for 3 to 5 times , And then began to heat up. After the temperature was raised to 140°C, 5g of ethylene oxide was introduced. After the pressure dropped and the temperature rose, 83g of ethylene oxide was continuously introduced, and the reaction temperature was controlled at 150-170°C and the reaction pressure was 0.1-0.5MPa. After the reaction is over, continue to mature for 30-50 minutes, cool to 70°C, take out the material, and weigh the mass of the material to 233.9g. The hydroxyl value and acid value of the test sample are both 0, which proves that there are no hydroxyl and carboxyl groups in the sample, and the synthesized sample can be judged to be the target sample. The saponification value of the product was detected. The saponification value of the p...

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Abstract

The invention provides cyclic polyether diester and a preparation method thereof, and application of a catalyst. The preparation method comprises the following steps: under the action of a catalyst, carrying out ring opening polymerization of ethylene oxide by taking cyclic anhydride as an initiator to prepare the cyclic polyether diester, wherein the catalyst comprises one or more of a compositeoxide, an alkyl compound, an alkoxy compound and a carboxylate of a group IIA metal, a composite oxide of the group IIA metal and aluminum, and a carboxylate and an alkyl compound of zinc. According to the method provided by one embodiment of the invention, cyclic polyether diester is prepared by a one-step method, and the method has the advantages of simple process flow and high yield.

Description

Technical field [0001] The invention relates to a polyether diester, in particular to a cyclic polyether diester and a preparation method thereof. Background technique [0002] Polyether diesters are usually obtained by the esterification reaction of polyether and acid or the transesterification reaction of polyether and ester. The esterification reaction and the transesterification reaction are a type of reversible chemical reaction. In order to improve the yield of the product, one of the substances is usually selected to be excessive, and the product in the reaction process is continuously distilled away to promote the reaction to proceed in the positive direction. [0003] Since the boiling point of polyether is usually higher than that of acid or ester, when controlling the reaction direction, the acid or ester is often selected to be excessive. If the acid and ester need to be recycled and reused after the reaction, a separation unit needs to be added to separate the product ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G65/26
CPCC08G65/2615C08G65/2654C08G65/2651C08G65/266C08G2650/24
Inventor 朱建民刘兆滨董振鹏赵春雨
Owner LIAONING OXIRANCHEM INC