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Bentonite composite super absorbent material and preparation method thereof

A technology of superabsorbent materials and bentonite, applied in chemical instruments and methods, silicon compounds, inorganic chemistry, etc., can solve the problems of insufficient sodium base effect and uneven sodium base, and achieve simple and feasible preparation process, uniform components, The effect of fast water absorption

Inactive Publication Date: 2019-03-01
句容康泰膨润土有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the sodium-based process, the calcium salt precipitate formed by the reaction between bentonite and sodiumizing agent is insoluble in water, which promotes the reaction to the right and forms sodium-based bentonite. However, due to the strong potential of calcium ions, bentonite has preferential adsorption of calcium ions Ability, therefore, the above reaction is reversible, it is impossible to achieve 100% sodium base, which in turn leads to the defects of uneven sodium base and insufficient sodium base effect

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A bentonite composite superabsorbent material, prepared from the following raw materials in parts by weight: 70-80 parts of sodium bentonite particles, 20-24 parts of N,N-methylenebisacrylamide, and 10-12 parts of polyurethane acrylate , microcrystalline cellulose 1-2 parts, sodium carbonate modified silica gel 1-5 parts, expanded vermiculite 1-5 parts, ammonium borate 0.1-1 part, magnesium hydroxide 0.1-1 part, polyacrylamide 0.1-0.4 part , 0.01-0.03 parts of ammonium persulfate, 0.1-0.3 parts of sodium hydroxide, and 0.1-0.3 parts of sodium thiosulfate.

[0024] A preparation method of bentonite composite superabsorbent material, comprising:

[0025] S1. Mix sodium-based bentonite particles, microcrystalline cellulose, sodium carbonate-modified silica gel, expanded vermiculite, ammonium borate, magnesium hydroxide and polyacrylamide evenly, carry out secondary sodiumization at 15°C for 24 hours, and grind into 100 mesh particles to obtain secondary sodium bentonite p...

Embodiment 2

[0031] A bentonite composite superabsorbent material, prepared from the following raw materials in parts by weight: 70-80 parts of sodium bentonite particles, 20-24 parts of N,N-methylenebisacrylamide, and 10-12 parts of polyurethane acrylate , microcrystalline cellulose 1-2 parts, sodium carbonate modified silica gel 1-5 parts, expanded vermiculite 1-5 parts, ammonium borate 0.1-1 part, magnesium hydroxide 0.1-1 part, polyacrylamide 0.1-0.4 part , 0.01-0.03 parts of ammonium persulfate, 0.1-0.3 parts of sodium hydroxide, and 0.1-0.3 parts of sodium thiosulfate.

[0032] A preparation method of bentonite composite superabsorbent material, comprising:

[0033] S1. Mix sodium-based bentonite particles, microcrystalline cellulose, sodium carbonate-modified silica gel, expanded vermiculite, ammonium borate, magnesium hydroxide and polyacrylamide evenly, carry out secondary sodiumization at 25°C for 30 hours, and grind into 200 mesh particles to obtain secondary sodium bentonite p...

Embodiment 3

[0039] A bentonite composite superabsorbent material, prepared from the following raw materials in parts by weight: 80-85 parts of sodium bentonite particles, 22-28 parts of N,N-methylenebisacrylamide, and 12-14 parts of polyurethane acrylate , microcrystalline cellulose 2-3 parts, sodium carbonate modified silica gel 2-3 parts, expanded vermiculite 2-3 parts, ammonium borate 0.3-0.6 parts, magnesium hydroxide 0.3-0.6 parts, polyacrylamide 0.4-0.8 parts , 0.01-0.03 parts of ammonium persulfate, 0.3-0.5 parts of sodium hydroxide, and 0.3-0.5 parts of sodium thiosulfate.

[0040] A preparation method of bentonite composite superabsorbent material, comprising:

[0041] S1. Mix sodium-based bentonite particles, microcrystalline cellulose, sodium carbonate-modified silica gel, expanded vermiculite, ammonium borate, magnesium hydroxide and polyacrylamide evenly, carry out secondary sodiumization at 15°C for 24 hours, and grind into 100 mesh particles to obtain secondary sodium bent...

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PUM

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Abstract

The invention discloses a bentonite composite super absorbent material and a preparation method thereof, and relates to the field of bentonite material preparation. The bentonite composite super absorbent material is prepared from the following raw materials in parts by weight: 70-90 parts of sodium bentonite particles, 20-30 parts of a polymer crosslinking agent, 10-15 parts of oligomeric resin,1-5 parts of microcrystalline cellulose, 1-5 parts of sodium salt modified silica gel, 1-5 parts of expanded vermiculite, 0.1-1 part of ammonium borate, 0.1-1 part of magnesium hydroxide, 0.1-1 part of polyacrylamide, 0.01-0.1 parts of a redox initiator, 0.1-1 part of an oxidant and 0.1-1 part of a reducing agent. The sodium bentonite particles are activated into secondary sodium bentonite particles to replace common sodium bentonite particles, and oligomeric resin is added. Compared with common bentonite absorbent materials, the bentonite composite super absorbent material has the advantagesof high water absorption rate, large water absorption amount and high permeation resistance. Besides, the preparation method is simple, the raw materials are easily available, and requirements on equipment are low.

Description

technical field [0001] The invention relates to the field of preparation of bentonite materials, in particular to a bentonite composite superabsorbent material and a preparation method thereof. Background technique [0002] Bentonite is a kind of clay rock, also known as montmorillonite, which has strong hygroscopicity (it can absorb water equivalent to 8-20 times its own volume and expand to 30 times), and can be dispersed in a colloidal suspension in an aqueous medium. And has a certain viscosity, thixotropy and lubricity, and its blend with sediment, etc. has plasticity and cohesiveness, and has strong cation exchange capacity and adsorption capacity. At present, artificial sodium-based technology is mainly used to modify calcium-based bentonite to sodium-based bentonite. In the sodium-based process, the calcium salt precipitate formed by the reaction between bentonite and sodiumizing agent is insoluble in water, which promotes the reaction to the right and forms sodium-...

Claims

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Application Information

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IPC IPC(8): C01B33/40
CPCC01B33/40
Inventor 朱成品
Owner 句容康泰膨润土有限公司
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