Production method of highly hydrogenated rosin

A technology of hydrogenated rosin and production method, applied in the field of rosin processing

Active Publication Date: 2021-04-02
HUNAN CHANGLING PETROCHEM SCI & TECH DEV CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Based on this, it is necessary to provide a method that does not require pretreatment of raw materials and has a simple process flow and hydrogenation reaction for the problems of raw materials in the production of hydrogenated rosin by the existing solvent method that need to be pretreated and the product quality caused by insufficient hydrogenation depth. Production method of highly hydrogenated rosin with more excellent effect

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0088] (1) Dissolving rosin in methylcyclohexane to obtain a rosin solution, and the mass content of rosin in the rosin solution is 50%.

[0089] (2) Mix the above-mentioned rosin solution with hydrogen, and perform pre-hydrogenation reaction, primary hydrogenation reaction and secondary hydrogenation reaction in sequence to obtain a gas-liquid mixture, and the pre-hydrogenation reaction is carried out in the presence of a hydrogenation protecting agent , the primary hydrogenation reaction is carried out in the presence of a primary hydrogenation reaction catalyst, and the secondary hydrogenation reaction is carried out in the presence of a secondary hydrogenation reaction catalyst.

[0090] Wherein, the molar ratio of hydrogen to rosin in the rosin solution is 10:1. The reaction conditions of the pre-hydrogenation reaction are: temperature 150°C, pressure 9MPa, based on the mass of rosin in the rosin solution, and a weight hourly space velocity of 5h -1 ; The reaction condit...

Embodiment 2

[0106] (1) Dissolving rosin in p-menthane to obtain a rosin solution, and the mass content of rosin in the rosin solution is 70%.

[0107] (2) Mix the above-mentioned rosin solution with hydrogen, and perform pre-hydrogenation reaction, primary hydrogenation reaction and secondary hydrogenation reaction in sequence to obtain a gas-liquid mixture, and the pre-hydrogenation reaction is carried out in the presence of a hydrogenation protecting agent , the primary hydrogenation reaction is carried out in the presence of a primary hydrogenation reaction catalyst, and the secondary hydrogenation reaction is carried out in the presence of a secondary hydrogenation reaction catalyst.

[0108] Wherein, the molar ratio of hydrogen to rosin in the rosin solution is 15:1. The reaction conditions of the pre-hydrogenation reaction are: temperature 140°C, pressure 5MPa, based on the mass of rosin in the rosin solution, and a weight hourly space velocity of 2h -1 ; The reaction conditions of...

Embodiment 3

[0113] (1) Dissolving rosin in cyclohexane to obtain a rosin solution, the mass content of rosin in the rosin solution is 20%.

[0114] (2) Mix the above-mentioned rosin solution with hydrogen, and perform pre-hydrogenation reaction, primary hydrogenation reaction and secondary hydrogenation reaction in sequence to obtain a gas-liquid mixture, and the pre-hydrogenation reaction is carried out in the presence of a hydrogenation protecting agent , the primary hydrogenation reaction is carried out in the presence of a primary hydrogenation reaction catalyst, and the secondary hydrogenation reaction is carried out in the presence of a secondary hydrogenation reaction catalyst.

[0115] Wherein, the molar ratio of hydrogen to rosin in the rosin solution is 5:1. The reaction conditions of the pre-hydrogenation reaction are: temperature 130°C, pressure 12MPa, based on the mass of rosin in the rosin solution, and a weight hourly space velocity of 8h -1 ; The reaction conditions of th...

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Abstract

The invention provides a highly-hydrogenated rosin production method, which comprises: directly dissolving rosin in a solvent, mixing with hydrogen, sequentially carrying out a pre-hydrogenation reaction, a first-stage hydrogenation reaction and a second-stage hydrogenation reaction, and carrying out separation purification to obtain the highly-hydrogenated rosin. Compared with the traditional solvent method for producing hydrogenated rosin, the production method of the present invention has the following advantages that the rosin pretreatment step is eliminated so as to achieve the simple process; the pre-hydrogenation reaction, the first-stage hydrogenation reaction and the second-stage hydrogenation reaction are set, such that the hydrogenation reaction effect is significant, almost 100% conversion rate of rosin can be obtained, the high product selectivity can be achieved, and particularly the highly-hydrogenated rosin having the tetrahydroabietic acid mass content of more than 65%can be obtained; and the highly-hydrogenated rosin is completely separated from the solvent, the side reaction substantially is not generated, and the quality of the product is good.

Description

technical field [0001] The invention relates to the technical field of rosin processing, in particular to a production method of highly hydrogenated rosin. Background technique [0002] Rosin is one of the important products in my country's forestry chemical industry. Rosin and its derivatives have important uses in the fields of chiral synthesis, medicine and chemical industry. The main chemical composition of rosin is a class of monocarboxylic acid-resin acids with a tricyclic phenanthrene skeleton and two double bonds. The double bonds in the molecule, especially the conjugated double bonds, are easily oxidized by oxygen in the air, making rosin The color deepens, the hydroxyl value increases, the polarity increases, and the product quality decreases. The method of catalytic hydrogenation can change the conjugated double bond structure of the abietic acid type resin acid, so that it tends to the stable structure of the alicyclic ring, thereby eliminating the disadvantage...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09F1/02C09F1/04
CPCC09F1/02C09F1/04
Inventor 佘喜春向明林周冬京汪永军杜鹏敖博
Owner HUNAN CHANGLING PETROCHEM SCI & TECH DEV CO LTD
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