Method for extracting montan wax from lignite

Abstract

The invention relates to a production method used for extracting lignite wax from lignite, which can effectively solve the problems that the lignite wax is difficult to be prepared, has small yield and can not meet the practical requirements. The technical proposal used for solving the problems is as follows: the lignite is crushed and prepared into grains, dried and sent to an extractor for carrying out extraction; the lignite grains with the lignite wax extracted are sent to a continuous dry desolventizer so as to remove an organic solvent; the lignite grains coming out of the dry desolventizer are used for extracting a humic acid; three-effectiveness separation of the organic solvent rich in lignite wax is carried out so as to remove 95 percent of the organic solvent; subsequently, vacuum condensation is carried out so as to obtain the lignite wax; and subsequently, the solvent is recovered and circularly used. The method has simple process, can carry out production of large scale in batches, has high production efficiency, low cost and no environmental pollution, saves material, is a great creation on the preparation of lignite wax, and the application of the method has huge economical and social benefits.

Description

1. Technical field [0001] The invention relates to the field of chemical industry, in particular to a production method for extracting montan wax from lignite. 2. Background technology [0002] Montan wax is a rare mineral. Germany first began to extract wax from lignite in 1897. Therefore, it is also called Montal wax abroad. It is a mineral wax containing wax, resin and asphalt. Montan wax has a relatively hard texture, high melting point, acid resistance, stable chemical properties, good gloss and electrical insulation, and is easily soluble in organic solvents. Its melting point is 75-86 ° C, density (20 ° C 0.98-1.03 g / cm3, wax The main components: wax esters composed of C16-C34 acids and C23-C30 alcohols; long-chain fatty acids (C20-C34) and alkanes (C23-C33). The components of the resin are sterols and terpenes. [0003] Montan wax is widely used as a substitute and supplement for expensive natural animal and vegetable waxes. In the daily chemical industry, it is wid...

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Problems solved by technology

[0005] In view of the above situation, in order to overcome the defects of the prior art, the purpose of the present invention is to provide a production method for extracting montan wax from lignite, which can effectively solve the problems of difficult preparation of montan wax, small output, and failure to meet actual needs. The technical solution The solution is to pulverize the lignite into granules, and send it to the extractor for extraction after drying. The lignite particles after extracting the montan wax are sent to the continuous drying desolventizer to remove the organic solvent and come out of the dry desolventizer. The lignite particles are used to extract humic acid, and the organic solvent rich in montan wax is subjected to three-effect separation. After removing 95% of the organic solvent, it is then concentrated in a vacuum to obtain montan wax. After obtaining the montan wax, the solvent is recovered and recycled. The invention has a simple process, can be mass-produced industrially, has high production efficiency, saves materials, is low in cost, and has no environmental pollution. It is a great creation in the preparation of montan wax, and its application has huge economic and social benefits.

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