Method for preparing light-color disproportionated rosin by using organic ceramsite decolorising agent

Abstract

The invention discloses a method for preparing light-color disproportionated rosin by using an organic ceramsite decolorising agent. The method comprises the steps of: 1) transferring the rosin from a sedimentation tank to a dissolver for dissolving, and sending the dissolved grease liquid into a clarification tank; 2) introducing protection gas, standing the dissolved grease liquid in the clarification tank static to automatically stratify the grease liquid and water, and sending the clarified grease liquid into a reactor; 3) in an inert gas environment, heating the reactor to 250-270 DEG C; 4) maintaining the protection gas environment, reducing the temperature to below 160 DEG C, and adding a palladium carbon ceramic catalyst and an organic ceramsite decolorising agent; 5) maintaining the protection gas environment, heating to 280-290 DEG C; and 6) reducing the temperature, and filtering the product in liquid state to remove the catalyst and decolorising agent mixed in the reaction product to obtain the light-color disproportionated rosin. The method for preparing light-color dispropriated rosin reduces the amount of catalyst in posttreatment, and reduces production cost, and the disproportionated rosin has higher acid value, lighter color and higher yield.

Description

technical field [0001] The invention belongs to the field of rosin deep processing, and in particular relates to a method for preparing light-colored disproportionated rosin with an inorganic ceramsite decolorizer. Background technique [0002] Rosin is a renewable natural resin, known as "the oil that grows on trees", and is one of the important forest chemical products. Rosin is widely used in coatings, adhesives, inks, papermaking, soap, metal processing, synthetic rubber, building materials, food, polymers, fine chemicals and other industries. The quality of rosin is mainly determined by its color, acid value, softening point, transparency, etc. In general, the lighter the color of rosin, the better the quality, the higher the grade, the wider the application range, and the higher the price. [0003] The methods for preparing light-colored rosin mainly include physical and chemical methods, and physical methods include adsorption decolorization and crystallization extra...

AI Technical Summary

Problems solved by technology

The effect of adsorption decolorization method is not obvious, and the loss of rosin is large, and the adsorbent is not easy to handle; the crystallization extraction method has a large amount of solvent

Chemical methods include concentrated sulfuric acid decolorization method and saponification method; the concentrated sulfuric acid decolorization method needs to filter and remove carbon residue, and a large amount of hydrocarbon solvent is used; the decolorization effect of saponification method is not ideal

[0004] At present, the color of the so-called colorless rosin in the market is around the second color, which is lighter in color, less stable, and has a smaller application range, especially not suitable for some adhesives and coating industries.

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