A production system for producing fumed white carbon black using silicon tetrachloride

Abstract

The invention discloses a production system for producing fumed white carbon black by using silicon tetrachloride. According to the reaction process, it includes a reaction furnace, an aggregation device, a separation device, a deacidification device and a tail gas recovery device arranged in sequence. It is characterized in that the The tail gas recovery device described above includes five stages of absorption towers connected in series, and the liquid phase outlet of each stage of absorption tower is matched with an absorption liquid storage tank, wherein the outlets of the absorption liquid storage tanks of the second, third, and fourth stage absorption towers are respectively connected to the corresponding front The absorption liquid inlet of the primary absorption tower is connected. The equipment layout of the production system is reasonable, the tail gas recovery effect is good, the production pipeline is not easy to be blocked, and the production efficiency is high.

Description

technical field [0001] The invention belongs to a production device in the field of fine chemical industry, in particular to a system for producing fumed white carbon black by using silicon tetrachloride. Background technique [0002] Fumed silica, also known as fumed silica, is one of the extremely important nano-scale inorganic raw materials. Fumed silica has small particle size, large specific surface area, strong surface adsorption, large surface energy, high chemical purity, good dispersion performance, excellent stability, reinforcement, thickening and thixotropy, and is widely used in many subject areas. [0003] Fumed white carbon black is a nano-scale white powder produced by high-temperature hydrolysis of silane halides (mainly silicon tetrachloride and methyltrichlorosilane) in a hydrogen-oxygen flame, and then further passed through the flocculation of the aggregation device and the solidification of the separation device. Gas separation and deacidification in ...

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Problems solved by technology

Each absorption tower is equipped with an acid circulation tank. The absorption liquid discharged from the absorption tower is pumped back into the respective absorption towers through the circulation pump to be used as the absorption liquid. As the concentration of the absorption liquid continues to increase, the absorption effect of the absorption liquid on the tail gas It is getting worse and worse; at the same time, the absorption liquid is recycled in a single absorption tower, the temperature of the absorption liquid tends to become higher, the temperature of the absorption liquid becomes higher, and the absorption effect on hydrogen chloride decreases

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