Method for preparing biomass polyester

A biomass and polyester technology, which is applied in the field of biomass polyester preparation, can solve the problems of poor flexibility of polyester macromolecular segments, high requirements for diol purity, and no description of polymerization process, etc., and achieve stable and excellent performance , maintain stability and reduce energy consumption

Active Publication Date: 2012-07-25
QUANZHOU HAITIAN MATERIAL TECH CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In the Chinese patent CN101525424A "Preparation method of polyethylene terephthalate", the content of ethylene glycol in the raw material ethylene glycol is 95% to 99.9%, and the purity requirement of the glycol is relatively high, so the purification is increased difficulty, increased cost
This patent is a preparation method of copolyester fiber, and there is no description of the polymerization process. Secondly, there are defects such as poor flexibility of polyester macromolecular segments, high melting point of polyester, and weak hydrophilicity of polyester.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] In the reactor, add the terephthalic acid of 166kg and the biomass mixed polyol of 68kg, wherein the biomass mixed polyol comprises the following weight ratio components: ethylene glycol 90wt%, 1,2-propanediol 5wt%, 1,2 -Butanediol 2wt%, pentanediol 2wt%, sorbitol 1wt%; Also add catalyst, thermal stabilizer and antioxidant in following esterification reaction, wherein add catalyst and be titanium dioxide and antimony trioxide, add-on is respectively 250ppm (i.e. 41.5g), adding heat stabilizer is trimethyl phosphate, adding amount is 33g antioxidant is antioxidant 1010, adding amount is 49g; after the above-mentioned components are mixed evenly, at temperature 225 ℃, pressure 0.3Mpa condition The esterification reaction was carried out at a temperature of 3 hours; after the esterification, the product was transported to the polycondensation tank, and the temperature was raised to 260° C. for the polycondensation reaction, and the polycondensation time was 6 hours; the bio...

Embodiment 2

[0035]In the reactor, add the terephthalic acid of 166kg and the biomass mixed polyol of 93kg, wherein the biomass mixed polyol comprises the following weight ratio components: ethylene glycol 99.2wt%, 1,2-propanediol 0.4wt%, 1 , 0.2wt% of 2-butanediol, 0.1wt% of pentanediol, 0.1wt% of sorbitol; In the following esterification reaction, catalyst and heat stabilizer are also added, wherein the catalyst is tetrabutyl titanate, and the addition amount is 120ppm (i.e. 20g), the heat stabilizer is trimethyl phosphate, and the addition amount is 22g; after the above-mentioned components are mixed evenly, the esterification reaction is carried out at 280°C and the pressure of 0.05Mpa, and the reaction time is 2.5h; After melting, the product is transported to the polymerization tank, and at the same time, the temperature is raised to 290° C. for polycondensation reaction, and the polycondensation time is 2 hours; finally, the biomass polyester is obtained.

Embodiment 3

[0037] Add 166kg of terephthalic acid and 80kg of biomass mixed polyols in the reactor, wherein the biomass mixed polyols include the following weight ratio components: ethylene glycol 95wt%, 1,2-propanediol 2wt%, 1,2 -Butanediol 1.5wt%, pentanediol 1wt%, sorbitol 0.5wt%; Catalyst, thermal stabilizer and antioxidant are also added in the following esterification reaction, wherein the catalyst added is antimony trioxide, the content is 500ppm (i.e. 83g); adding heat stabilizer is alkyl phosphoric acid diester, adding amount is 29g, adding antioxidant is antioxidant 168, adding amount is 49g; after mixing evenly, carry out esterification under temperature 240 ℃, pressure 0.2MPa condition Reaction, the reaction time is 3.5h; after esterification, the product is transported to the polymerization tank, and at the same time, the temperature is raised to 280°C for polycondensation reaction, and the polycondensation time is 5h; finally the biomass polyester is obtained.

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PUM

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Abstract

The invention discloses a method for preparing biomass polyester, which comprises the following steps of: preparing slurry from terephthalic acid and biomass mixed with polyatomic alcohol according to a molar ratio of 1:1.05 to 1:1.5; then adding the prepared slurry into an esterification reaction kettle to perform the esterification reaction; and finally, performing the condensation polymerization to obtain the biomass polyester, wherein the biomass mixed with the polyatomic alcohol comprises the following components in percentage by weight: 90 to 99.2 percent of ethylene glycol, 0.4 to 5 percent of 1,2-propylene glycol, 0.2 to 2 percent of 1,2-butanediol, 0.1 to 2 percent of pentylene glycol and 0.1 to 1 weight percent of sorbierite. According to the invention, the biomass mixed with the polyatomic alcohol used as a raw material is prepared by a biological fermenting and extracting process and replaces petroleum base ethylene glycol prepared by a conventional method, so that the petroleum using amount and the amount of carbon dioxide discharged outward in the smelting process can be reduced and the phenomenon of shortage of petroleum in China can also be relieved. According to the invention, the design method is reasonable, the energy consumption is reduced, the industrial production is easy to implement and the production cost is reduced.

Description

technical field [0001] The invention relates to a preparation method of biomass polyester, in particular to a preparation method of polyol terephthalate whose raw material is derived from biomass. Background technique [0002] With the development of the global economy, the demand for oil is increasing day by day, while oil resources are dwindling day by day, the contradiction between oil supply and demand is becoming more and more serious, and the war for oil is intensifying. The whole world is working hard to use the inexhaustible biological resources on the earth. Research, exploration, utilization of renewable biomass resources, development of biomass chemical industry, substitution of petrochemical products, and obtaining energy, resources and materials from biomass are the only way to solve the resource and energy crisis and an important way for sustainable development. Therefore, the development of raw materials that can reduce or replace petroleum is a very important...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/20C08G63/183C08G63/85C08G63/86
Inventor 王启明王朝生李晚享蒋宇陈向玲张雯
Owner QUANZHOU HAITIAN MATERIAL TECH CORP
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