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Process for preparing white carbon black using attapulgite clay

A technology of attapulgite clay and attapulgite, applied in the direction of silica, etc., can solve the problems of low activity of rod-shaped silica, low purity of silica, and difficulty in removing impurities

Inactive Publication Date: 2007-07-11
INST OF SOIL SCI CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Although this method saves the high-temperature alkali fusion process and reduces the production cost compared with the prior art, it is difficult to remove impurities after acid leaching because it adopts an acid-dissolving one-step method, so the purity of the prepared silica is relatively low; In addition, the acid-dissolving process in this method is difficult to destroy the rod-like structure of the attapulgite clay, so the activity of the prepared rod-shaped silica is relatively low

Method used

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  • Process for preparing white carbon black using attapulgite clay

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] Crush attapulgite to 200 mesh, take 50g of powder and add 150ml of distilled water, stir to make a suspension, then add about 2g of sodium hexametaphosphate, continue to stir and disperse for 1 hour; transfer the above suspension into a reaction vessel, At 100°C, add 15ml of sulfuric acid to react for 3 hours; after the reaction is completed, wait for the slurry to cool, then vacuum filter, and wash the filter cake with water three times; transfer the filter cake to a reaction vessel, add 250ml of water, and add 1g of sodium oxalate and 16g of Sodium hydroxide, react at 100°C for 2h. After vacuum filtration, the filtrate was transferred to a reaction kettle, and 150ml of distilled water was added at the same time, and 25% sulfuric acid was slowly added under stirring conditions at 50°C until the pH of the solution was about 7.0 to obtain white carbon black "seed crystals". After aging for 2 hours, the "seed crystal" was put into water glass and sulfuric acid solution at...

Embodiment 2

[0048] Take 50g of attapulgite powder of 200 mesh and add 150ml of distilled water, stir to form a suspension, then add about 2g of sodium hexametaphosphate, continue to stir and disperse for 1 hour; transfer the above suspension into a reaction vessel, at 100°C, Add 18ml of sulfuric acid to react for 3 hours; after the reaction is completed, wait for the slurry to cool, then vacuum filter, wash the filter cake with water three times; transfer the filter cake to a reaction vessel, add 250ml of water, add 1g of sodium oxalate and 18g of sodium hydroxide while stirring, Reaction at 100°C for 2h. After vacuum filtration, the filtrate was transferred to the reaction kettle, and 150ml of distilled water was added at the same time, and 30% hydrochloric acid was slowly added at 50°C under stirring conditions until the pH value of the solution was about 7.0 to obtain white carbon black "seed crystals" and placed for 2 hours Then put water glass and hydrochloric acid solution at the sa...

Embodiment 3

[0050]Take 50g of attapulgite powder of 200 mesh and add 150ml of distilled water, stir to form a suspension, then add about 2g of sodium hexametaphosphate, continue to stir and disperse for 1 hour; transfer the above suspension into a reaction vessel, at 100°C, Add 18ml of sulfuric acid to react for 3 hours; after the reaction is completed, wait for the slurry to cool, then vacuum filter, wash the filter cake with water three times; transfer the filter cake to a reaction vessel, add 250ml of water, add 1g of sodium oxalate and 18g of sodium hydroxide while stirring, Reaction at 100°C for 2h. After vacuum filtration, the filtrate was transferred to a reaction kettle, and 150ml of distilled water and 5ml of n-butanol were added at the same time, and 30% hydrochloric acid was slowly added at 50°C under stirring conditions until the final pH value was stable at 8-9. The prepared white carbon black slurry was vacuum filtered and washed about three times, dried at 120° C., and grou...

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Abstract

The invention discloses a white carbon black making method through concave-convex bar-shaped stone clay, which comprises the following steps: adopting concave-convex bar-shaped stone clay as raw material; proceeding roughing separation; grinding; allocating concave-convex bar-shaped stone powder into suspension; stirring the suspension to disperse; transmitting the suspension into autoclave; heating; adding condensed acid to dissolve; removing impurity; obtaining the slurry; filtering; washing; obtaining the filter pie; heating the filter pie to remove impurity again; neutralizing through acid; separating solid from liquid; drying the solid; grinding to obtain the product.

Description

technical field [0001] The invention belongs to the field of deep processing of non-metallic minerals and the technical field of inorganic chemical industry, and relates to a method for preparing white carbon black by using attapulgite clay. Background technique [0002] White carbon black (ie: activated silica) is a widely used inorganic chemical raw material. The preparation of white carbon black by conventional methods requires the consumption of a large amount of soda ash and acid, and the production process is complicated and the production cost is relatively high. [0003] In the application document of Chinese Patent No. 02148523.2, a method for producing nano-rod-shaped active silica is disclosed by using attapulgite clay as a raw material. In the method, the attapulgite rods are firstly beneficiated, then dried and pulverized, and then the rod-shaped silica is obtained by acid leaching. [0004] Although compared with the prior art, this method saves the high-temp...

Claims

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Application Information

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IPC IPC(8): C01B33/113
Inventor 董元华马毅杰沈培友
Owner INST OF SOIL SCI CHINESE ACAD OF SCI
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