Method for preparing sodium-hydroxide-loaded active clay

A technology of activated clay and sodium hydroxide, applied in chemical instruments and methods, inorganic chemistry, silicon compounds, etc., can solve the problems of high cost, long cycle, low efficiency, etc., and achieve high production efficiency, low energy consumption and cost, Efficient effect

Inactive Publication Date: 2016-05-04
罗永城
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The technical problem to be solved in the present invention is to provide a preparation method of activated clay loaded with sodium hydroxide, so as to solve t

Method used

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  • Method for preparing sodium-hydroxide-loaded active clay

Examples

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Example Embodiment

[0023] Example 1

[0024] A preparation method of sodium hydroxide-loaded activated clay includes the following steps:

[0025] S1: Mix bentonite and activated clay wastewater with a concentration of 12% in a weight ratio of 1.5:8, and stir evenly at a speed of 200r / min to obtain slurry material A;

[0026] S2: Add the slurry material A prepared in step S1 to 15% hydrochloric acid, the weight ratio of slurry material A to hydrochloric acid is 2:10, stir at 500r / min, and heat to 88°C, Keep at 88°C and react for 2h to obtain slurry material B;

[0027] S3: Press filter the slurry material B obtained in step S2 at a pressure of 0.92 MPa to obtain a filter cake A with a water content of 42%;

[0028] S4: Add water to filter cake A prepared in step S3 and stir to dissolve it. The amount of water added is 7 times the weight of filter cake A. After stirring and dissolving filter cake A, add polyferric sulfate and stir for 0.5h to precipitate the solution. Press filtration at 0.92MPa to obtai...

Example Embodiment

[0032] Example 2

[0033] A preparation method of sodium hydroxide-loaded activated clay includes the following steps:

[0034] S1: Mix bentonite and activated clay wastewater with a concentration of 8% at a weight ratio of 1.2:4, and stir evenly at a speed of 300r / min to obtain slurry material A;

[0035] S2: Add the slurry material A obtained in step S1 to 13% sulfuric acid, the weight ratio of the slurry material A to sulfuric acid is 1:3, stir at 300r / min, and heat to 85°C, Keep at 85°C and react for 3 hours to obtain slurry material B;

[0036] S3: Press filter the slurry material B prepared in step S2 at a pressure of 0.92 MPa to obtain a filter cake A with a moisture content of 40%;

[0037] S4: Add water to the filter cake A prepared in step S3 and stir to dissolve it. The amount of water added is 6.5 times the weight of filter cake A. After stirring and dissolving filter cake A, add polyaluminum sulfate and stir for 1 hour to precipitate the solution. The precipitate is at a p...

Example Embodiment

[0041] Example 3

[0042] A preparation method of sodium hydroxide-loaded activated clay includes the following steps:

[0043] S1: Mix bentonite and activated clay wastewater with a concentration of 10% in a weight ratio of 1.4:6, and stir evenly at a speed of 250r / min to obtain slurry material A;

[0044] S2: Add the slurry material A prepared in step S1 to the nitric acid with a concentration of 14%, the weight ratio of the slurry material A to the nitric acid is 1:4, stir at a speed of 400r / min, and heat to 86°C, Keep it at 86°C and react for 3 hours to obtain slurry material B;

[0045] S3: Press filter the slurry material B prepared in step S2 at a pressure of 0.93 MPa to obtain a filter cake A with a water content of 42%;

[0046] S4: Add water to the filter cake A prepared in step S3 and stir to dissolve it. The amount of water added is 7 times the weight of filter cake A. After stirring and dissolving filter cake A, add polyaluminum sulfate and stir for 0.5h to precipitate the...

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Abstract

The present invention discloses a method for preparing sodium-hydroxide-loaded active clay, and belongs to the technical field of bentonite deep processing, and the sodium-hydroxide-loaded active clay is prepared by the steps of dosing, pulp preparation, acid activation reaction, pressure filtration, alkalization, drying, crushing, and the like. The alkali solubility of the sodium-hydroxide-loaded active clay prepared by the method is 0.44-0.47gNaOH / 100mlH2O, the alkali capacity is 16.1-16.3mmol / g, the sodium-hydroxide-loaded active clay prepared by the method is high in quality and stable; the method for preparing the sodium-hydroxide-loaded active clay is high in production efficiency, and low in energy consumption and cost; waste acid obtained in the method is recyclable, and the method can effectively reduce the cost of sewage and acid treatment, and is conducive to energy conservation and emission reduction.

Description

technical field [0001] The invention belongs to the technical field of bentonite deep processing, and in particular relates to a preparation method of activated clay loaded with sodium hydroxide. 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] Sodium hydroxide-loaded activated clay is obtained from bentonite as raw material, which is acidified to form activated clay, and then alkalized on this basis. It is a laye...

Claims

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Application Information

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IPC IPC(8): C01B33/40
CPCC01B33/40
Inventor 罗永城
Owner 罗永城
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