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Method of refining and processing rosin

A technology of refining treatment and rosin, applied in the direction of natural resin refining, etc., can solve the problems of large investment and energy consumption, and achieve the effects of less equipment investment, simple steps and low energy consumption

Inactive Publication Date: 2010-03-10
GUANGXI UNIV FOR NATITIES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But because the boiling point of rosin resin acid is higher, vacuum distillation operation needs higher temperature (about 230 ℃) and certain vacuum condition, so the equipment investment and energy consumption of preparing refined rosin are bigger, the production method of refined rosin for this reason Needs to be further improved

Method used

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  • Method of refining and processing rosin
  • Method of refining and processing rosin

Examples

Experimental program
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Effect test

Embodiment 1

[0018] Weigh 50 grams of horsetail rosin, put it into a 100mL round-bottomed flask after fine grinding, fully dissolve with dichloromethane, the mass volume ratio of rosin and dichloromethane is 10:15, filter to remove insoluble solids; add acetonitrile under stirring , the mass volume ratio of rosin to acetonitrile is 10:20, let it stand for 10 minutes, so that the resin acid is fully precipitated; filter and collect the resin acid precipitate, heat and distill the filtrate, collect the fraction before 70 ° C, which is dichloromethane; cool the remaining solution To room temperature, the precipitated resin acid is collected by filtration again, the filtrate is combined, heated and evaporated to reclaim acetonitrile; finally the resin acid is precipitated in N 2 or CO 2 Under protection, heat fusion, cooling and solidification to obtain refined light-colored horsetail rosin.

Embodiment 2

[0020] Weigh 100 grams of horsetail rosin, put it into a 500mL round-bottomed flask after fine grinding, fully dissolve with dichloromethane, the mass volume ratio of rosin and dichloromethane is 10:20, filter to remove insoluble solids; add acetonitrile under stirring , the mass volume ratio of rosin to acetonitrile is 10:30, let it stand for 20 minutes, so that the resin acid is fully precipitated; filter and collect the resin acid precipitate, heat and distill the filtrate, collect the fraction before 70 ° C, which is dichloromethane; cool the remaining solution To room temperature, the precipitated resin acid is collected by filtration again, the filtrate is combined, heated and evaporated to reclaim acetonitrile; finally the resin acid is precipitated in N 2 or CO 2 Under protection, heat fusion, cooling and solidification to obtain refined light-colored horsetail rosin.

Embodiment 3

[0022] Weigh 500 grams of rosin, put it into a 1000mL round-bottomed flask after fine grinding, fully dissolve with dichloromethane, the mass volume ratio of rosin and dichloromethane is 10:20, filter to remove insoluble solids; add acetonitrile under stirring , the mass volume ratio of rosin to acetonitrile is 10:30, let it stand for 30 minutes, so that the resin acid is fully precipitated; the resin acid precipitate is collected by filtration, the filtrate is heated and distilled, and the fraction before 70 °C is collected, which is dichloromethane; the remaining solution is cooled To room temperature, the precipitated resin acid is collected by filtration again, the filtrate is combined, heated and evaporated to reclaim acetonitrile; finally the resin acid is precipitated in N 2 or CO 2 Under protection, heat fusion, cooling and solidification to obtain refined light-colored horsetail rosin.

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Abstract

The invention provides a method of refining and processing rosin, comprising the following steps: (1) dissolving rosin in dichloromethane, and filtering the solution of the rosin and the dichloromethane to remove the insoluble impurities; (2) adding acetonitrile to the solution of the rosin and the dichloromethane to precipitate resin acid, filtering the solution of the rosin and the dichloromethane, and collecting the precipitated resin acid; heating to distill filtrate, collecting the distillate formed blow 70 DEG C, recycling the dichloromethane, filtering and collecting part of resin acidwhich is precipitated after the residual filtrate is cooled to the room temperature; combining the filtrate, and then heating to distill the filtrate and recycle the dichloromethane; and (3) heating to melt the precipitated resin acid at normal pressure under the protection of N2 or CO2, and cooling the melted precipitated resin acid to obtain the refined rosin of light color, high acid value andlow unsaponifiable matter. The method of refining and processing rosin uses no special pressure resisting equipment, is easy to operate, has low production cost and is particularly suitable for industrial production.

Description

technical field [0001] The invention relates to a method for refining rosin, more specifically dissolving rosin in a benign solvent, precipitating and separating rosin resin acid with a non-benign solvent of rosin resin acid, and most of the unsaponifiable matter, oxidized resin acid and colored substances, etc. It is easy to dissolve in non-good solvents, and is separated and removed by filtration in a simple way, so as to obtain a refined light-colored rosin with light color, high acid value and low content of unsaponifiable matter. Background technique [0002] Rosin is a renewable forest chemical resource with unique physical and chemical properties. It is widely used in papermaking, soap, paint, ink, rubber, synthetic resin, electrical appliances, insulating materials, organic synthesis and other industries. However, rosin is a complex mixture, the main component is resin acid, there are also a small amount of fatty acid, unsaponifiable matter (neutral matter), and colo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09F1/02
Inventor 黄道战蓝虹云雷福厚
Owner GUANGXI UNIV FOR NATITIES
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