A method of continuously producing resin-removed lignite wax and resin and a device thereof

Abstract

The invention discloses a method of continuously producing resin-removed lignite wax and resin and a device thereof. The method includes continuously leaching lignite wax in a rotocel extractor by utilization of organic solvent, and removing the resin and recovering the solvent. The device comprises a solvent turnover pot, a leaching system, a solvent removing system of resin-removed lignite wax, a resin solvent removing system, a vacuum system and a steam distributor. According to the method and the device, a manner of low-temperature (lower than 20 DEG C) counter-current mass transfer and cyclic leaching is adopted. Benzene, toluene or ethyl acetate is adopted as the solvent, or a mixture of ethyl acetate and benzene or toluene is adopted as the solvent to highly dissolve the resin to be removed. The resin-removed lignite wax with high quality and the byproduct resin can be obtained by solvent removing treatment. The leaching efficiency is high and operation is cyclic. Large-scale continuous production is achieved. The yield of the resin-removed lignite wax is more than 80%. The resin content is lower than 5%. The solvent consumption is low with less than 100 kg of the solvent being consumed by per ton of the wax. A manner of removing the solvent under negative pressure is utilized, and therefore the solvent removing efficiency is high and the solvent removing temperature is low, decarboxylation of the lignite wax is prevented effectively and the acid value and the saponification number of the wax are guaranteed.

Description

technical field [0001] The invention belongs to the technical field of montan wax production, and in particular relates to a method and a device for continuously producing degreasing montan wax and co-production resin. Background technique [0002] Montan wax is a kind of fossilized animal and vegetable wax extracted from lignite, and the resin content in the wax is relatively high. The resin in montan wax belongs to the plant resin class, containing about 70% neutral substances (terpenes and polyterpenes) and 30% acidic substances (resin acids), which are of the same kind as fossilized amber, and some of its properties are similar In natural rosin. Degreasing wax is the wax obtained by removing the resin from montan wax. It is a product of montan wax upgrading, and it is also a light-colored refined wax raw material, which belongs to high-quality wax raw material. Resin has a great influence on product quality, such as making carbon paper sticky, glazing wax not smooth wh...

AI Technical Summary

Problems solved by technology

Domestic Shulan in Jilin and Xundian Wax Factory in Yunnan used to produce degreasing wax in a one-pot and indirect form of deresinization and wax desolvation. However, due to the difficulty in balanced control of the production process and the small scale of production, continuous large-scale production cannot be automated. Low degree, low yield of degreasing wax (about 70%), high resin content (about 10%), high solvent consumption (a ton of wax is more than 300kg), etc.

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