Method for removing aluminum trichloride catalyst form petroleum resin by dry cleaning

Abstract

The invention discloses a method for removing an aluminum trichloride catalyst form petroleum resin by dry cleaning. The method comprises the following steps of: 1, feeding a fully reacted polymerization solution containing aluminum trichloride, calcium hydroxide, liquid ammonia, hargil, and surfactant into a neutralization kettle, performing primary neutralization reaction at the temperature of between 20 and 50 DEG C, wherein the retention time of materials is 0.5 to 1 hour, and refluxing and dehydrating; 2, feeding the materials into a neutralization buffering kettle and performing secondary neutralization reaction at the temperature of between 40 and 60 DEG C, wherein the retention time of the materials is 2 to 3 hours, and refluxing and dehydrating for second time; and 3, filtering the materials by using a filter to separate solid impurities in the materials out to obtain a resin solution, wherein the filtering temperature is 30 to 50 DEG C. By the method, the aluminum trichloride catalyst which is separated out after polymerization can be effectively removed, the influence to the physical and chemical properties of a resin product can be reduced, high-quality resin which is shallow in color and luster and low in ash content can be obtained simultaneously, the production of wastewater is greatly reduced, and energy consumption is reduced.

Description

1. Technical field [0001] The invention belongs to the technical field of petroleum resin synthesis, and in particular relates to a method for removing an aluminum trichloride catalyst in C5 petroleum resin by dry cleaning. 2. Background technology [0002] The production of petroleum resin is synthesized by polymerization reaction, and most of the polymerization reactions use aluminum trichloride as a catalyst. At present, domestic large, medium and small petroleum resin manufacturers have been using water washing or alkali washing to remove the aluminum chloride catalyst precipitated after polymerization. This method has a greater selectivity for the viscosity of the resin liquid, and it is easier to Emulsification occurs, and the neutralization is not complete, which directly affects the physical and chemical properties of the resin product, such as darker color, large ash content, etc., and the water washing or alkali washing process consumes a lot of energy, and a large...

AI Technical Summary

Problems solved by technology

At present, domestic large, medium and small petroleum resin manufacturers have been using water washing or alkali washing to remove the aluminum chloride catalyst precipitated after polymerization. This method has a greater selectivity for the viscosity of the resin liquid, and it is easier to Emulsification occurs, and the neutralization is not complete, which directly affects the physical and chemical properties of the resin product, such as darker color, large ash content, etc., and the process of water washing or alkali washing consumes a lot of energy, and a large amount of lye or waste water produced in production will also cause environmental pollution. Pollution

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