Process for the production of rosin esters

By forming a thin layer of the reaction mixture on a heated surface and using equipment such as a thin-film evaporator for continuous or semi-continuous esterification reactions, the problems of long residence time and large equipment occupation in rosin ester production are solved, achieving more efficient quality control and production efficiency.

CN122374409APending Publication Date: 2026-07-10NESTE OYJ
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
NESTE OYJ
Filing Date
2024-12-17
Publication Date
2026-07-10

AI Technical Summary

Technical Problem

In the existing rosin ester production process, the esterification reaction has a long residence time, making it difficult to achieve efficient quality control and flexible production process, and the traditional batch process occupies a large amount of equipment.

Method used

Using equipment such as thin-film evaporators, short-path evaporators, or falling-film evaporators, the reaction mixture is distributed on a heated surface to form a thin layer. By removing the evaporated substances, a continuous or semi-continuous esterification reaction is achieved, shortening the residence time and increasing the reaction rate.

Benefits of technology

This achieves higher quality control and shorter esterification reaction time, reduces equipment usage, and improves production efficiency and product quality.

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Abstract

A method for producing rosin esters includes preparing a reaction mixture comprising an alcohol and rosin, where the rosin is gum rosin, wood rosin, or tall oil rosin. The method includes distributing the reaction mixture over a heated surface to form a thin layer of the reaction mixture in which an esterification reaction occurs (201). The method includes removing water and other substances evaporated from the reaction mixture from a gas space adjacent to the layer of the reaction mixture, and removing from the heated surface a product in which the esterification reaction produces rosin esters. Because the layer (201) of the reaction mixture is thin, the mass transfer path for water molecules leaving the reaction mixture is short, and correspondingly the evaporation surface is large. This allows a low water concentration to be maintained in the reaction mixture and thereby increases the reaction speed.
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