Method and device for producing lignite S wax with carbon chains of C26-C36

Abstract

The invention discloses a method and a device for producing lignite S wax with carbon chains of C26-C36. The production method comprises the following steps: using lignite wax, sodium dichromate, chromic anhydride and sulfuric acid as raw materials; performing the processes of acidification, two-stage oxidation, acid pickling, washing, dehydration and forming. The device comprises an oxidation reaction kettle, an acid pickling kettle, a washing kettle, a vacuum dehydration tank, a forming machine, a finished product tank, a matched liquid preparation device and a matched head liquid supply device, which are technologically connected in sequence; the head liquid supply device comprises a sodium dichromate head tank, a chromic anhydride head tank, an oxidized acid head tank, an acid picking head tank and a washing head tank; the sodium dichromate head tank, the chromic anhydride head tank and the oxidized acid head tank are connected to an inlet of the oxidation reaction kettle; the acid picking head tank is connected to an inlet of the acid pickling kettle; the washing head tank is connected to an inlet of the washing kettle; a waste liquid outlet of the oxidation reaction kettle is connected with an oxidized waste liquid tank. The method is simple in technological process, the operation is simple and convenient, the device is easy to implement, the large-scale, continuous and automatic production can be realized, and the mass percent of the higher aliphatic acid in the S wax is more than 85%. The energy consumption is low, and the sustainable development is facilitated.

Description

technical field [0001] The invention belongs to the technical field of coal chemical industry, and further belongs to the technical field of montan wax deep processing industry and leather chemicals, and specifically relates to a carbon chain of C 26 -C 36 The production method and device thereof of light-colored S wax. Background technique [0002] Montan wax and degreasing wax (including mildly oxidized wax-brown wax) are greatly affected and restricted in application due to their darker color and certain impurities (resin and asphalt); more than 80% of montan wax in the world Transforming into light-colored refined wax is the only way to upgrade products, improve the economics of enterprises, extend the industrial chain, and avoid low-level and low-value market competition of montan wax. At present, Germany monopolizes more than 90% of light-colored refined waxes in the international market. Light-colored refined wax is S wax (high-carbon fatty acid wax). S wax is the ...

AI Technical Summary

Problems solved by technology

High-carbon fatty acids usually use montan wax as raw material. In industry, steam vacuum distillation, nitric acid method and chromic acid method have been used to produce light-colored high-carbon fatty acids: the distillation method is to decompose wax esters by heat and break them into small molecules. The process of this method is complicated, and the yield is less than 30%. In 1900, Germany built a factory for the production of light-colored wax by steam-vacuum distillation. The product is softer than S wax and the yield is low (20-25%).

At the end of the 1970s in Xundian, Yunnan, my country, and in 1985, Shulan, Jilin also adopted this process for production (pilot plant), but they all ended up with high power consumption, heavy pollution, unqualified electrolyzer diaphragm, and high cost.

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