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Preparation method of colorless pentalyn

A technology for rosin pentaerythritol ester and refined rosin is applied in the field of deep processing of rosin, which can solve the problems of high equipment and cost, and achieve the effects of improving the quality and yield of rosin, saving equipment and cost, and saving energy consumption.

Inactive Publication Date: 2014-04-02
GUANGXI BEILIU ZHAOZHOU FOREST PROD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, there are many preparation technologies of colorless rosin pentaerythritol ester, but rosin is generally used, and after melting, pentaerythritol is added to react with catalysts; in the esterification reaction, inert gas is generally used for protection, and the equipment and cost are relatively high.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0021] Example 1, take 1000kg of rosin in a dissolving tank, add 60kg of turpentine oil, heat up, stir, and fully dissolve. Filter the dissolved pine resin to remove mechanical impurities. The turpentine liquid is put into a distillation kettle for steam distillation at a distillation temperature of 140°C to separate high-grade turpentine. Raise the temperature to 170° C., carry out steam distillation under reduced pressure with a vacuum degree of 20 mmHg, and separate middle oil and heavy oil from turpentine. When the temperature is raised to 270°C and the vacuum degree is 5mmHg, refined rosin is produced by rectification under reduced pressure. The obtained refined rosin was directly put into the esterification reaction kettle, 1.1kg of catalyst and 93kg of pentaerythritol were added, and the esterification reaction was carried out at 270°C with a stirring speed of 50r / min and a reaction time of 8h. After the esterification reaction, vacuum distillation was carried out at ...

example 2

[0022] Example 2, take by weighing 1300kg of pine resin in a dissolving tank, add 120kg of turpentine medium oil, heat up, stir, and fully dissolve. Filter the dissolved pine resin to remove mechanical impurities. The turpentine liquid is put into a distillation kettle for steam distillation at a distillation temperature of 150°C to separate high-grade turpentine. Raise the temperature to 180° C., carry out steam distillation under reduced pressure with a vacuum degree of 15 mmHg, and separate middle oil and heavy oil from turpentine. When the temperature is raised to 250°C and the vacuum degree is 5mmHg, refined rosin is produced by rectification under reduced pressure. The obtained refined rosin was directly put into the esterification reaction kettle, 1.5kg of catalyst and 120kg of pentaerythritol were added, at 270°C, the stirring speed was 80r / min, the reaction time was 8h, and the esterification reaction was carried out. After the esterification reaction, vacuum distil...

example 3

[0023] Example 3, take by weighing 1300kg of turpentine in a dissolving tank, add 100kg of turpentine medium oil, heat up, stir, and fully dissolve. Filter the dissolved pine resin to remove mechanical impurities. The turpentine liquid is put into a distillation kettle for steam distillation at a distillation temperature of 150°C to separate high-grade turpentine. Raise the temperature to 180° C., carry out steam distillation under reduced pressure with a vacuum degree of 30 mmHg, and separate middle oil and heavy oil from turpentine. When the temperature is raised to 270°C and the vacuum degree is 5mmHg, refined rosin is produced by rectification under reduced pressure. The obtained refined rosin was directly put into the esterification reaction kettle, 1.6kg of catalyst and 120kg of pentaerythritol were added, at 270°C, the stirring speed was 70r / min, the reaction time was 8h, and the esterification reaction was carried out. After the esterification reaction, vacuum distil...

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Abstract

The invention discloses a preparation method of colorless pentalyn, which comprises the following steps of: by taking turpentine as a raw material, carrying out the processes of steam distillation, reduced pressure steam distillation, reduced pressure rectification and the like to produce refined rosin; by taking the refined rosin as a raw material, carrying out esterification reaction under certain conditions without inert gas shielding by adding catalysts and pentaerythritol; and after the reaction is finished, carrying out reduced pressure distillation to obtain the colorless pentalyn. The colorless pentalyn prepared by the preparation method disclosed by the invention has the characteristics that: the color is light and is less than or equal to No.50 Hazen color number; the thermal stability is good and is less than or equal to No.200 Hazen color number (180 DEG C, 4 hours); the initial adhesion is high and is greater than or equal to 850cps (180 DEG C); and the softening point is as high as 100-105 DEG C.

Description

technical field [0001] The invention belongs to the field of rosin deep processing, and relates to a method for preparing colorless rosin pentaerythritol ester using rosin as a raw material without the protection of an inert gas. Background technique [0002] The rosin industry is one of the four pillar industries of my country's forestry industry. my country's rosin trade volume accounts for about 60% of the world's total, and it is known as the "sunrise industry". [0003] Due to its structural characteristics, rosin has many excellent properties such as anti-corrosion, moisture-proof, insulation, adhesion and emulsification, and is widely used in ink, paint, adhesive, coating and soldering industries. However, due to the instability of rosin itself, such as easy crystallization, easy to be oxidized and discolored, and low softening point, its performance and application fields are limited to a certain extent. Esterification modification of rosin is one of the important w...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09F1/04
Inventor 赖兆周谢刚黎贵卿梁雄关继华
Owner GUANGXI BEILIU ZHAOZHOU FOREST PROD