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Method for mixing raw materials for fumed white carbon black production

A technology of fumed white carbon black and raw materials, applied in chemical instruments and methods, climate sustainability, silicon compounds, etc., can solve the problems of difficult production control, affecting heat exchange effect, high operating costs, etc., to achieve easy disassembly and cleaning, Good economic benefits and the effect of improving product quality

Active Publication Date: 2020-02-14
HUBEI XINGRUI SILICON MATERIAL CO LTD
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional vaporizer is a kettle-type vaporizer with a vaporization temperature of 85-95°C. The exterior is jacketed and the interior has heating tubes. The vaporization efficiency of this structure of the vaporizer is not high, and the internal cracked tubes are easy to accumulate solid impurities and high boiling point viscous Liquid, not easy to clean, will affect the heat transfer effect over time
The vaporizer actually undertakes the functions of gasification and overheating. The overheating effect is not good, and it is easy to be entrained by vapor and liquid, which will have a bad impact on the quality of subsequent products.
Therefore, the traditional mixing method has low working efficiency and high operating costs. Due to the difference in the boiling point of each raw material, there may be deviations between the gasified components and the actual required ratio, resulting in difficult production control and unstable product quality.

Method used

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  • Method for mixing raw materials for fumed white carbon black production
  • Method for mixing raw materials for fumed white carbon black production

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] The flow rate of monomethyltrichlorosilane is adjusted to 1 t / h by the regulating valve, and it is injected into the monomethyltrichlorosilane vaporizer (6) by the monomethyltrichlorosilane feed pump (3) to be vaporized at a temperature of 68°C. The silicon tetrachloride controlled flow rate of 1.137t / h is pumped into the silicon tetrachloride vaporizer (5) by the silicon tetrachloride feed pump (4), and the vaporization temperature is 60°C. The silicon tetrachloride vaporizer (5) and the monomethyltrichlorosilane vaporizer (6) are heated by 0.2MPa (G) steam. The two vaporized gases are mixed in the pipeline and then enter the superheater (7). The superheater is heated by 1.0MPa(G) steam, the superheating temperature is 160°C, and the pressure is 0.08MPa(G). The distance L between the contact point of silicon chloride in the pipeline and the superheater is 2.5m. The mixing contact time of monomethyltrichlorosilane and silicon tetrachloride is 4s. After the superheated...

Embodiment 2

[0016] The monomethyltrichlorosilane flow rate in the monomethyltrichlorosilane storage tank (1) is 1t / h and is pumped (3) into the vaporizer (6) for vaporization, and the vaporization temperature is 68°C; the silicon tetrachloride The flow of silicon tetrachloride and monomethyltrichlorosilane in the storage tank (2) is adjusted in cascade to control the flow rate of 2.274t / h, which is injected into the vaporizer (5) by the pump (4) for vaporization, and the vaporization temperature is 60°C; Methyltrichlorosilane and silicon tetrachloride are mixed in the pipeline and enter the superheater (7), the superheating temperature is 160°C, and the pressure is 0.08MPa(G). The distance L between the vaporized monomethanol and silicon tetrachloride in the pipeline from the contact point to the superheater is 3m. The mixing contact time of monomethyltrichlorosilane and silicon tetrachloride is 7s. The mixed gas from the superheater is filtered by the precision filter (8), mixed with hy...

Embodiment 3

[0018] The flow of monomethyltrichlorosilane in the monomethyltrichlorosilane storage tank (1) is 1.5t / h and is pumped (3) into the vaporizer (6) for vaporization, and the vaporization temperature is 80°C; The silicon tetrachloride in the silicon storage tank (2) and the monomethyl trichloride in the silicon storage tank (2) are cascaded to adjust the control flow rate of 0.853t / h by the pump (4) into the vaporizer (5) for vaporization, and the vaporization temperature is 90°C; the vaporized monomethyl trichloride Chlorosilane and silicon tetrachloride are mixed in the pipeline and enter the superheater (7), with a superheating temperature of 170°C and a pressure of 0.12MPa(G). The mixed gas from the superheater is filtered by the precision filter (8), mixed with hydrogen and air in a molar ratio of 1:1.2:10, and sent to the synthesis furnace to be hydrolyzed at 1260°C to generate gas-phase white carbon black.

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Abstract

The invention discloses a method for blending fumed silica production raw materials. The method comprises the steps of carrying out flow regulation on monomethyl trichlorosilane, and vaporizing through a monomethyl vaporizer; carrying out flow cascade regulation on silicon tetrachloride and methyl trichlorosilane according to a process proportion, and vaporizing through a silicon tetrachloride vaporizer; mixing the two vaporized gases in a pipeline, feeding into a superheater, purifying the superheated gas through a precision filter, and carrying out pyrohydrolysis in a synthesis furnace. Themethod provided by the invention is simple in process flow, accurate in compounding, capable of obtaining good-quality products, and beneficial to saving energy consumption and equipment investment, and has a favorable application prospect.

Description

technical field [0001] The invention relates to the technical field of gas phase white carbon black production, in particular to a raw material mixing process for gas phase white carbon black production. Background technique [0002] Fumed silica is one of the most important nano-scale inorganic raw materials. Due to its specific properties, it is widely used in various industries as additives, rubber reinforcing agents, plastic fillers, advanced daily cosmetic fillers, medicine, environmental protection and other fields. . It also provides a new material foundation and technical guarantee for the development of related industrial fields. Fumed silica is mainly produced by high-temperature hydrolysis of chlorosilane in a hydrogen-oxygen flame to produce nano-scale white powder, which is further flocculated by a flocculation device, solid-gas separation by a separation device, and deacidification by a deacidification device to obtain fumed silica. The initial raw material f...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B33/18
CPCC01B33/183C01P2006/12Y02P20/10
Inventor 高英苗刚胡丹吴浩沈维云王斌
Owner HUBEI XINGRUI SILICON MATERIAL CO LTD
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