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Preparation method of alkaline white clay

A technology of alkaline clay and filter cake, applied in chemical instruments and methods, inorganic chemistry, non-metallic elements, etc., can solve the problems of unstable quality, low whiteness of alkaline clay, low alkali capacity, etc., and achieve the production process. The effect of shortened cycle, stable whiteness and high production efficiency

Inactive Publication Date: 2016-09-21
GUANGXI LONGAN RUIFENG IND TRADING CO LTD
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  • Summary
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The technical problem to be solved in the present invention is to provide a preparation method of alkaline clay to solve the problems of low whiteness, low alkali capacity and unstable quality in alkaline clay in the prior art

Method used

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  • Preparation method of alkaline white clay

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preparation example Construction

[0028] A preparation method of alkaline clay, comprising the following steps:

[0029] S1: mix bentonite and activated clay wastewater with a concentration of 7%-16% in a weight ratio of 1-2.2:3.5-14, and stir evenly at a rotating speed of 100-400r / min to obtain slurry material A;

[0030] S2: Add the slurry material A prepared in step S1 to the inorganic mixed acid with a concentration of 11%-20%, the inorganic mixed acid is sulfuric acid with a concentration of 16-18wt%, hydrochloric acid with a concentration of 34-36wt%, and 20-22wt% phosphoric acid is a mixed acid composed of 2-6:3-5:1-2 by volume, the weight ratio of slurry material A to inorganic mixed acid is 1-3.2:4-16, and the rotating speed is 200- Add reducing agent and stir under the condition of 550r / min. The reducing agent includes one or more of sodium hydrosulfide, sodium sulfide, sodium disulfide, sodium polysulfide, and ammonium sulfide. The weight ratio of reducing agent to slurry material A is 1-2:50-150, ...

Embodiment 1

[0038] A preparation method of alkaline clay, comprising the following steps:

[0039] S1: Mix bentonite and activated clay wastewater with a concentration of 10% at a weight ratio of 1.5:9, and stir evenly at a rotating speed of 300r / min to obtain slurry material A;

[0040] S2: Add the slurry material A prepared in step S1 into the inorganic mixed acid with a concentration of 16%, and the inorganic mixed acid is sulfuric acid with a concentration of 17wt%, hydrochloric acid with a concentration of 35wt%, and phosphoric acid with a concentration of 22wt% by volume The mixed acid composed of 3:3:2, the weight ratio of the slurry material A to the inorganic mixed acid is 2:10, and sodium hydrosulfide is added under the condition of rotating speed of 400r / min to stir, the weight of sodium hydrosulfide and the slurry material A The ratio is 2:120, heated to 85°C, and kept at 85°C for 2.5h to prepare slurry material B;

[0041] S3: press-filter the slurry material B prepared in s...

Embodiment 2

[0047] A preparation method of alkaline clay, comprising the following steps:

[0048] S1: Mix bentonite and activated clay wastewater with a concentration of 16% at a weight ratio of 2.2:14, and stir evenly at a rotating speed of 400r / min to obtain a slurry material A;

[0049] S2: Add the slurry material A prepared in step S1 into the inorganic mixed acid with a concentration of 20%, and the inorganic mixed acid is sulfuric acid with a concentration of 18wt%, hydrochloric acid with a concentration of 36wt%, phosphoric acid with a concentration of 22wt% by volume The mixed acid of 6:5:2 composition, the weight ratio of slurry material A and inorganic mixed acid is 3.2:16, add sodium sulfide and stir under the condition of 550r / min at rotating speed, the weight ratio of sodium sulfide and slurry material A is 2:150, heated to 93°C, kept at 93°C for 1.2h to prepare slurry material B;

[0050] S3: press-filter the slurry material B prepared in step S2 under a pressure of 0.95 M...

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Abstract

The invention discloses a preparation method of alkaline white clay, and belongs to the technical field of bentonite deep processing. The alkaline white clay is prepared by the steps of preparation of material, slurrying, acid activation reaction, press filtration, alkalization, drying, crushing and the like. The alkali capacity of the alkaline white clay prepared by the invention is 18.9-19.6 mmol / g, and the quality of the alkaline white clay is stable. The method adds reducing agent which can reduce the Fe<3+> produced by an acid corrosion device to the light Fe<2+>, so that the influence on the whiteness of the activated clay caused by the color of Fe<3+> can be avoided.

Description

【Technical field】 [0001] The invention belongs to the technical field of bentonite deep processing, and in particular relates to a preparation method of alkaline clay. 【Background technique】 [0002] Bentonite is called natural nano material and universal clay. The quality of bentonite in my country is excellent, and its ore reserves rank second in the world. Except for a small amount of exports as raw materials for organic bentonite, the rest are sold domestically in the form of bentonite powder and activated clay. These products are primary products with low economic benefits and low resource utilization levels. . In order to obtain greater economic benefits, it is necessary to develop serialized new products with high-tech content and expand new areas of application. [0003] Alkaline clay is obtained from bentonite as raw material, which is acidified to form activated clay, and then alkalized on this basis. It is a layered mineral material with special anion exchange ca...

Claims

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Application Information

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IPC IPC(8): C01B33/40
CPCC01B33/40
Inventor 梁福珏梁福瑜
Owner GUANGXI LONGAN RUIFENG IND TRADING CO LTD
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