Unlock instant, AI-driven research and patent intelligence for your innovation.

Preparation method of white carbon black

A technology of white carbon black and silicon tetrachloride, which is applied in chemical instruments and methods, inorganic chemistry, alkali metal compounds, etc., can solve the problems of low production technology level, high construction cost, difficult treatment and utilization of hydrogen chloride, etc., and achieves remarkable results. Economic and social benefits, low production costs, and resource-saving effects

Inactive Publication Date: 2012-05-16
开封新巨源环保科技开发有限公司
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, although a part of silicon tetrachloride can be consumed in the production technology of silicon tetrachloride to produce fumed white carbon black, the construction cost of the production equipment of this technology is relatively high, which cannot be afforded by general enterprises, and a large amount of hydrogen chloride produced at the same time is difficult to handle and use
Silicon tetrachloride can also be used to produce ethyl silicate, but the domestic production technology level is low, and the amount of silicon tetrachloride consumed by this method is limited

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] A kind of preparation method of embodiment 1 white carbon black comprises the following steps: (1) in the 500mL retort that agitator, reflux condenser and constant pressure funnel are housed, add 200g silicon tetrachloride hydrolyzate, then to distillation Add 200mL of ethanol aqueous solution with a mass percentage concentration of 75% in the bottle, heat up to 75°C, stir for 1 hour, then cool and filter, put the filter cake into a retort, and then add 200mL of ethanol with a mass percentage concentration of 46% to the retort. The aqueous ethanol solution was heated to 75°C, stirred for 1 hour, cooled and filtered to obtain filter residue A, and the two filtrates were combined to obtain filtrate B; (2) filter residue A obtained in step (1) was mixed with 440mL mass percentage concentration to be 20% mixed dilute nitric acid, stirred and reacted for 1 hour, the reaction temperature was 65°C, and then filtered to obtain filtrate C and filter residue D, which was added to ...

Embodiment 2

[0012] A kind of preparation method of embodiment 2 white carbon blacks, comprises the following steps: (1) in the 500mL distillation flask that agitator, reflux condenser and constant pressure funnel are housed, add 200g silicon tetrachloride hydrolyzate, then to distillation Add 200mL of ethanol aqueous solution with a mass percentage concentration of 80% in the bottle, heat up to 72°C, stir for 1 hour, then cool and filter, put the filter cake into a retort, and then add 200mL of 30% ethanol in the retort The aqueous ethanol solution was heated to 72°C, stirred for 1 hour, cooled and filtered to obtain filter residue A, and the two filtrates were combined to obtain filtrate B; (2) the filter residue A obtained in step (1) was mixed with 380mL mass percentage concentration to be 11% mixed dilute sulfuric acid, stirred and reacted for 0.5 hours, the reaction temperature was 50°C, and then filtered to obtain filtrate C and filter residue D, which was added to water, and then th...

Embodiment 3

[0013] A kind of preparation method of embodiment 3 white carbon blacks, comprises the following steps: (1) in the 1000mL distillation flask that agitator, reflux condenser and constant pressure funnel are housed, add 200g silicon tetrachloride hydrolyzate, then to distillation Add 350mL of ethanol aqueous solution with a mass percentage concentration of 90% in the bottle, heat up to 75°C, stir for 1.5 hours, then cool and filter to obtain filter residue A and filtrate B; (2) filter residue A obtained in step (1) and 400mL mass percent Mix dilute hydrochloric acid with a concentration of 15%, stir and react for 2 hours, the reaction temperature is 40°C, and then filter to obtain filtrate C and filter residue D. The filter residue D is washed with ammonia water with a concentration of 18% by mass until neutral, and then washed with warm water 3 times, dry, pulverize, get 56g product white carbon black, be white powdery solid; (3) step (1) described filtrate B is through distilla...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a preparation method of white carbon black, which comprises the following steps of: (1) washing silicon tetrachloride hydrolysate with ethanol water and filtering to obtain filter residue A and filter liquor B; (2) reacting the filter residue A with dilute acid, filtering to obtain filter liquor C and filter residue D, and treating the filter residue D to obtain the white carbon black; (3) distilling the filter liquor B, recovering the ethanol, recycling the recovered ethanol back to the step (1), distilling residual mother liquor, decoloring, filtering, and recycling the filter liquor back to the step (1); and (4) merging the cleaning mixture of the filter liquor C and the filter residue D in the step (2), adjusting the pH value to be neutral, decoloring, filtering, concentrating, crystallizing in a cooling way, and drying to obtain the slat of byproduct. The white carbon black has good product quality, simple technological process, mild reaction condition, easy operation and small investment, meets the requirement of environmental protection, and has good economic benefits and social benefits.

Description

technical field [0001] The invention belongs to the field of inorganic fine chemicals, and in particular relates to a preparation method of white carbon black. Background technique [0002] White carbon black (SiO2 nH2O) can be divided into precipitated white carbon black and fumed white carbon black according to the production method. The traditional method of preparing white carbon black is to use sodium silicate and tetraethyl orthosilicate as silicon source, and the cost is relatively high. Now, with the rapid development of information technology and solar energy industry, domestic demand for polysilicon is growing rapidly. Polysilicon enterprises produce a large amount of silicon tetrachloride by-product in the production process. Taking domestic as an example, every 1 ton of polysilicon produced will produce 15 tons of silicon tetrachloride by-product. At the same time, in the synthesis process of trichlorosilane, every 1 ton of trichlorohydrogen Silicon by-product ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C01B33/12C01F11/24C01D9/00C01D5/00C01C1/16
Inventor 王树立陈丹云郭泉辉范伟莉夏鸿飞曾东阳张登高王倚天
Owner 开封新巨源环保科技开发有限公司