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Preparation method of organic bentonite

A technology of bentonite and sodium bentonite, applied in chemical instruments and methods, inorganic chemistry, non-metallic elements, etc., can solve the problems of inability to achieve hydrophobic performance and adsorption capacity, insufficient intercalation, system compatibility, suspension and colloid rate. and other problems, to achieve the effect of improving the compatibility of the system, good hydrophobicity and strong activity

Inactive Publication Date: 2018-03-09
喀左双龙矿业有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the preparation of organic bentonite is generally to select a single organic covering agent for organic modification through ion exchange, the ion exchange capacity is only 60% to 70%, the intercalation in the lamellar structure is not full, and the product cannot achieve the ideal hydrophobic performance. and adsorption capacity, so that the system compatibility, suspension and colloidal rate of the product are affected during use

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] (1), bentonite sodium modification

[0018] Grind 100 kg of calcium-based bentonite with a Raymond machine to a fineness of 100 mesh to 325 mesh, add 180 kg of water for beating, add 4 kg of sodium carbonate and mix evenly, and age at 37°C to 40°C for 10 days to obtain sodium Base bentonite slurry;

[0019] (2) Organic modification of sodium bentonite

[0020] Add all the sodium-based bentonite slurry prepared in step (1) and 38 kg of polyacrylamide into the reaction kettle, react at a temperature of 40°C to 50°C, and a pressure of 1.75MPa to 1.8MPa for 4.5min, press filter, Make the water content of filter cake≤3%; Then filter cake is transferred in the modification machine, adds 4.5 kilograms of dibutyl phthalates and 1.5 kilograms of octadecyltrimethyl ammonium chloride in the modification machine, Carry out the reaction for 5 minutes, and dry to obtain the primary product of organic modification of sodium bentonite; add all the primary products of organic modifica...

Embodiment 2

[0022] (1), bentonite sodium modification

[0023] Grind 100 kg of calcium-based bentonite with a Raymond machine to a fineness of 100 mesh to 325 mesh, add 200 kg of water for beating, add 4.5 kg of sodium carbonate and mix evenly, and age at 37°C to 40°C for 12 days to obtain sodium Base bentonite slurry;

[0024] (2) Organic modification of sodium bentonite

[0025] Put all the sodium-based bentonite slurry prepared in step (1) and 44 kg of polyacrylamide into the reaction kettle, react at a temperature of 50°C to 60°C and a pressure of 1.9MPa to 2.0MPa for 3 minutes, and press filter to make The water content of filter cake≤3%; Then filter cake is transferred in the modification machine, adds 5.5 kilograms of dibutyl phthalates and 2 kilograms of cetyltrimethylammonium bromide in the modification machine, carries out React for 10 minutes and dry to obtain the organically modified primary product of sodium bentonite; add all the obtained organically modified primary produ...

Embodiment 3

[0027] (1), bentonite sodium modification

[0028] Grind 100 kg of calcium-based bentonite with a Raymond machine to a fineness of 100 mesh to 325 mesh, add 190 kg of water for beating, add 4.2 kg of sodium carbonate and mix evenly, and age at 37°C to 40°C for 11 days to obtain sodium Base bentonite slurry;

[0029] (2) Organic modification of sodium bentonite

[0030] Put all the sodium-based bentonite slurry prepared in step (1) and 40 kg of polyacrylamide into the reaction kettle, react at a temperature of 45°C to 55°C for 4 minutes, and press filter to make the water content of the filter cake ≤3% Then filter cake is transferred in the modification machine, in the modification machine, add 5 kilograms of dibutyl phthalates and 1.8 kilograms of cetyltrimethylammonium bromide, carry out reaction 8min, dry, obtain sodium Na-based bentonite organically modified primary product; add all the obtained sodium-based bentonite organically modified primary products into the mixer, ...

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PUM

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Abstract

A method for preparing organic bentonite, comprising grinding calcium-based bentonite with a Raymond machine to a fineness of 100 mesh to 325 mesh, adding water for beating, adding sodium carbonate to mix evenly, and aging to obtain sodium-based bentonite slurry; The base bentonite slurry and polyacrylamide are added to the reaction kettle for reaction, pressure filtration, and then transferred to the modification machine, and dibutyl phthalate and emulsifier are added to the modification machine for modification and drying , added to a mixer, and mixed with dimethyl octadecyl benzyl ammonium chloride to obtain organic bentonite. The advantages are: reasonable process, high ion exchange capacity, good hydrophobic performance, strong adsorption capacity, and can improve the compatibility, suspension and colloidal rate of the system.

Description

technical field [0001] The invention relates to a preparation method of organic bentonite. Background technique [0002] Bentonite is a clay rock with montmorillonite as the main mineral. Montmorillonite is composed of two silicon-oxygen tetrahedrons sandwiching a layer of aluminum-oxygen octahedron, forming a unique layered structure with adsorption and cation exchange properties. Bentonite is in The chemical industry enjoys the title of "universal clay". [0003] Organic bentonite is modified by inserting organic covering agent into the lamellar structure of montmorillonite through ion exchange technology. The surface of modified bentonite changes from hydrophilic to hydrophobic, and the content of organic carbon is greatly increased, the adsorption performance of hydrophobic organic pollutants in the environment is significantly enhanced, and it has good thickening, thixotropy, suspension stability, and high temperature stability. properties, lubricity, film-forming pro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B33/44
CPCC01B33/44C01P2006/82
Inventor 国臣
Owner 喀左双龙矿业有限责任公司
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