Production method of rosin ethyl alcohol ester

A technology for rosin ethanol and a production method, which is applied in the field of deep processing of rosin, can solve problems such as the dark color of rosin ethanol ester, and achieve the effects of short reaction time, thorough esterification reaction and simple preparation process

Inactive Publication Date: 2018-01-12
GUANGXI ZHONGCHANG RESIN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of this invention is to provide a kind of production method of rosin alcohol ester, the production method of this rosin alcohol ester can solve the problem that the color of rosin alcohol ester is dark

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] The production method of present embodiment rosin alcohol ester comprises the following steps:

[0020] A. Put the rosin into the vacuum distillation device, turn on the vacuum distillation device, evacuate to 50 Pa, heat up to 210°C-220°C, keep the heat and distill for 0.5 hours, and obtain refined rosin;

[0021] B. Mix sodium thiosulfate, aluminum hydroxide and hypophosphorous acid in a weight ratio of 3:1:2 to obtain a composite catalyst;

[0022] C. Transfer the refined rosin obtained in the step into an esterification kettle, add ethanol and a composite catalyst, mix evenly, and under the protection of nitrogen, heat up to 220-280°C for 5 hours of esterification; wherein, rosin, ethanol and composite The mass ratio of the catalyst is 2:1.5:0.0004;

[0023] D. After step C is finished, transfer to a vacuum distillation device, reduce the pressure to a vacuum of 0.5KPa and distill for 40 minutes to obtain rosin alcohol ester.

[0024] The color of the rosin ethano...

Embodiment 2

[0026] The production method of present embodiment rosin alcohol ester comprises the following steps:

[0027] A. Add rosin to the vacuum distillation device, turn on the vacuum distillation device, evacuate to 100 Pa, heat up to 210°C to 220°C, keep the temperature and distill for 1 hour, and obtain refined rosin;

[0028] B. Mix sodium thiosulfate, aluminum hydroxide and hypophosphorous acid in a weight ratio of 8:0.4:3 to obtain a composite catalyst;

[0029] C. Transfer the refined rosin obtained in the step into an esterification kettle, add ethanol and a composite catalyst, mix well, and under the protection of nitrogen, heat up to 220-280°C for 7 hours of esterification; wherein, rosin, ethanol and composite The mass ratio of the catalyst is 3:3.5:0.0005;

[0030] D, after step C is finished, transfer to the vacuum distillation device, reduce the pressure to a vacuum degree of 1KPa and distill for 50 minutes to obtain rosin alcohol ester.

[0031] The color of the ros...

Embodiment 3

[0033] The production method of present embodiment rosin alcohol ester comprises the following steps:

[0034] A. Add the rosin to the vacuum distillation device, turn on the vacuum distillation device, evacuate to 170 Pa, heat up to 210°C-220°C, keep the heat and distill for 0.3 hours, and obtain refined rosin;

[0035] B. Mix sodium thiosulfate, aluminum hydroxide and hypophosphorous acid in a weight ratio of 1:1.5:0.5 to obtain a composite catalyst;

[0036] C. Transfer the refined rosin obtained in the step into an esterification kettle, add ethanol and a composite catalyst, mix well, and under the protection of nitrogen, heat up to 220-280°C for 3 hours of esterification; wherein, rosin, ethanol and composite The mass ratio of the catalyst is 3:2:0.0003;

[0037] D, after step C is finished, transfer to the vacuum distillation device, reduce the pressure to a vacuum degree of 2KPa and distill for 30 minutes to obtain rosin ethanol ester.

[0038] The color of the rosin ...

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PUM

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Abstract

The invention discloses a production method of rosin ethyl alcohol ester and relates to the technical field of deep processing of rosin. The method comprises the following steps: preparing refined rosin; performing an esterifying reaction between the refined rosin and ethyl alcohol under the action of a composite catalyst prepared by mixing sodium thiosulfate, aluminum hydroxide and hypophosphorous acid, wherein the sodium thiosulfate can realize a function of accelerating bleaching so that the color of rosin ethyl ester becomes light; the aluminum hydroxide can remarkably increase the esterifying speed so that the esterifying reaction is more thorough.

Description

technical field [0001] The invention relates to the technical field of rosin deep processing, in particular to a production method of rosin ethanol ester. Background technique [0002] Ethanol ester of rosin, namely rosin ethyl ester, is the product obtained by the esterification reaction of rosin and ethanol under the action of a catalyst; rosin ethyl ester is the most important variety in rosin deep processing, accounting for more than 30% of rosin deep processing products. [0003] The carboxyl group of the resin acid in rosin has a large steric hindrance, and the esterification reaction energy is relatively high. It needs to be reacted at a higher temperature for a long time to obtain a qualified product. The color of the obtained rosin ethyl ester is darker, which is not conducive to the market. compete. [0004] The existing rosin modification methods include hydrogenation, refining, esterification, dehydrogenation and other methods. The activation energy of the ester...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09F1/02C09F1/04
Inventor 黄桂彬蒋茵荣
Owner GUANGXI ZHONGCHANG RESIN
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