Organic silicon residue slurry treatment device and treatment method

Abstract

The invention relates to an organic silicon residue slurry treatment device and treatment method. The treatment device comprises a suspension separator, wherein the side wall of the suspension separator is connected with a slag slurry inlet pipeline; the top of the suspension separator is connected with a clear solution outlet pipeline; the bottom of the suspension separator is connected with a bottom solution outlet pipeline; the end part of the clear solution outlet pipeline is connected with a pressurization leaf filter; the bottom of the pressurization leaf filter is connected with a filtrate outlet pipeline; and the end part of the filtrate outlet pipeline is connected with an organic-silicon high-boiling clear solution storage tank. When the slag slurry treated by the technique is used for catalytic cracking, the cracked crude product contains about 20% of dimethyl dichlorosilane, 36% of methyl trichlorosilane, 40% of methyl dichlorosilane and less than 1% of organic silicon high-boiling substance. Compared with the slag slurry hydrolysis technique adopted by most organic silicon manufacturers at present, the method provided by the invention avoids discharging abundant acid mist in the hydrolysis process, and reasonably reutilizes the valuable high-boiling substances from the generated solid waste slag.

Description

technical field [0001] The invention belongs to the technical field of comprehensive utilization of organic silicon by-products, and in particular relates to a treatment device and method for organic silicon slag. Background technique [0002] Organosilicon slag refers to a kind of waste slag generated during the synthesis of organosilicon monomers, which accounts for about 3% of the monomer volume. The main components are silicon powder (particle size 2-150um), copper powder and trace elements Fe, Zn, Al, Sn, etc. brought out by a large amount of high boilers and a small amount of fluidized bed. Among them, the boiling range of high boilers is 70.5-250°C, the composition is mainly disilane, siloxane, and silylene, and the solid content is 20-75%. If it is exposed in the air, it is easy to cause strong acid mist and burn, so it must be treated harmlessly. At present, many organic silicon production enterprises discharge the slurry in the pool for hydrolysis, the discharged...

AI Technical Summary

Problems solved by technology

The disadvantage of this method is that it is suitable for treating organic silicon slurry with a relatively small solid content (<5%). When the solid content is higher than 20%, due to the high concentration of cuprous ions, the organic silicon slurry that is gradually concentrated is evaporated at a high temperature of 250 ° C. , easy to cause combustion, explosion, and poor safety

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