Method of precisely control product burning decrement during white carbon black production process by precipitation method

A technology of precise control and reduction on burning, applied in the direction of silicon oxide, etc., can solve the problem that the burning loss of products cannot be precisely controlled.

Active Publication Date: 2007-07-18
SHANXI TOND CHEMICAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problem in the prior art that the loss on ignition of the product cannot be accurately controlled in the process of producing white carbon black by the precipitation

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0010] Embodiment 1, a method for accurately controlling the loss on ignition of the product in the process of producing white carbon black by the precipitation method, the steps include reacting sodium carbonate and quartz sand as raw materials to generate sodium silicate, and then further synthesizing reaction of sodium silicate and concentrated sulfuric acid To generate sodium sulfate and white carbon black, the modulus of the generated sodium silicate is controlled stepwise, and then the temperature is controlled at 80°C during the synthesis reaction, and the concentration of sodium silicate is controlled at 2.2mol / L.

[0011] The modulus of the raw material sodium silicate produced by white carbon black is controlled in three stages of 3.10-3.20, 3.20-3.30, and 3.30-3.40. Different proportions of soda ash can be realized, and the loss on ignition of the produced white carbon black can be controlled at 3~4, 4~5, 5~6 respectively. For example, when the modulus of sodium sil...

Embodiment 2

[0012] Embodiment 2, a method for accurately controlling the loss on ignition of the product in the process of producing white carbon black by precipitation method, the steps include reacting sodium carbonate and quartz sand as raw materials to generate sodium silicate, and then further synthesizing reaction of sodium silicate and concentrated sulfuric acid To generate sodium sulfate and white carbon black, the modulus of the generated sodium silicate is controlled stepwise, and then the temperature is controlled at 95°C during the synthesis reaction, and the concentration of sodium silicate is controlled at 2.8mol / L.

[0013] The modulus of the raw material sodium silicate produced by white carbon black is divided into three stages: 3.10-3.20, 3.20-3.30, and 3.30-3.40. Different proportions can be achieved, and the loss on ignition of the produced white carbon black can be controlled at 3-4, 4-5, and 5-6, respectively. Specifically, for example: when the modulus of sodium sil...

Embodiment 3

[0014] Embodiment 3, a method for accurately controlling the loss on ignition of the product in the process of producing white carbon black by precipitation method, the steps include reacting sodium carbonate and quartz sand as raw materials to generate sodium silicate, and then further synthesis reaction of sodium silicate and concentrated sulfuric acid To generate sodium sulfate and white carbon black, the modulus of the generated sodium silicate is controlled stepwise, and then the temperature is controlled at 85°C during the synthesis reaction, and the concentration of sodium silicate is controlled at 2.4mol / L.

[0015] The modulus of the raw material sodium silicate produced by white carbon black is divided into three stages: 3.10-3.20, 3.20-3.30, and 3.30-3.40. Different proportions can be achieved, and the loss on ignition of the produced white carbon black can be controlled at 3-4, 4-5, and 5-6, respectively. Specifically, for example: when the modulus of sodium silica...

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Abstract

This invention relates to a precipitation method for producing gum acacia. It concrete is a method for accuracy controlling product calor decrement in process of precipitation method producing gum acacia. It has solved that calor decrement can not be accuracy controlled in existing precipitation method producing Gum Acacia. Steps include: produce sodium silicate by natrium carbonicum reacting with quartz sand, produce natrium sulfuricum and gum acacia by composition reaction of sodium silicate and concentrated sulfuric acid, hierarchically control modulus of produced sodium silicate, control temperature to 80-95deg in composition reaction, control sodium silicate density to 2.2-2.8mol/L. This invention needs not to change previous production line and production unit. Calor decrement of prepared gum acacia can be controlled between precise scope of 3-4, 4-5, and 5-6 respectively. It can satisfy requirement of different user.

Description

technical field [0001] The invention relates to a process for producing white carbon black by a precipitation method, in particular to a method for precisely controlling the loss on ignition of a product in the process of producing white carbon black by a precipitation method. Background technique [0002] Existing precipitation method produces white carbon black technology, comprises that raw material is sodium carbonate and quartz sand, reacts to generate sodium silicate at high temperature, Na 2 CO 3 +SiO2 2 →Na 2 SiO 3 +CO 2 , Then sodium silicate and concentrated sulfuric acid are further synthesized and reacted to generate sodium sulfate and pure silicon dioxide, namely white carbon black. Precipitated silica is hydrolyzed into hydrated silica and water by silicic acid generated by the reaction of sodium silicate and sulfuric acid under certain conditions. The reaction formula is: Na 2 SiO 3 +H 2 SO 4 →H 2 SiO 3 +Na 2 SO 4 , H 2 SiO 3 → SiO 2 +H 2 O pr...

Claims

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Application Information

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IPC IPC(8): C01B33/113
Inventor 张云升邬敦伟邬庆文邬宇锋
Owner SHANXI TOND CHEMICAL CO LTD
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