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Preparation method and application of organic composite sodium modified bentonite microparticle retention and drainage aid

A technology of sodium modification and particle retention, which is applied in the direction of retention aid addition, inorganic compound addition, paper, etc., and can solve the problems that the modification effect is not as good as wet modification, the bentonite impurities are difficult to separate, and the concentration of bentonite is low. To achieve the effect of broadening the source of raw materials, reducing production costs and improving performance

Inactive Publication Date: 2015-08-26
ZHEJIANG SCI-TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this retention and drainage system, bentonite particles need to be modified by sodium treatment, generally by sodium carbonate wet method, but the modification process has disadvantages such as difficult separation of bentonite impurities, low concentration of bentonite, and high drying cost.
In addition, some scientific researchers have proposed extrusion method and field heap sodiumization method to modify bentonite, but the modification effect is not as good as wet modification.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] First, anionic organic particles were synthesized by inverse microemulsion polymerization. In the water phase, acrylic acid and acrylamide are used as monomers, the molar ratio of the two is 1:1, and the mass fraction of the monomers is 10% of the water phase. Add sodium hydroxide in an equimolar amount to acrylic acid, equivalent to the amount of monomers 0.01% electrolyte sodium acetate, 2ppm (equivalent to the amount of monomeric acrylic acid) cross-linking agent N,N'-methylenebisacrylamide; in the oil phase, liquid paraffin oil is used as a solvent, and the surfactants are Span80 and Tween60 The mixture of the two, the mass ratio of the two is 3:1, and the mass fraction of the surfactant is 10% of the total mass of the oil phase. Slowly add the water phase solution into the oil phase, the stirrer speed is 50r / min, the reaction temperature is 30°C, feed nitrogen to keep the reaction in the anaerobic state, after deoxygenation for 50 minutes, add the initiator potassi...

Embodiment 2

[0019] First, anionic organic particles were synthesized by inverse microemulsion polymerization. In the water phase, acrylic acid and acrylamide are used as monomers, the molar ratio of the two is 1:2, and the mass fraction of the monomers is 30% of the water phase. Add sodium hydroxide in an equimolar amount to acrylic acid, equivalent to the amount of monomers 0.3% electrolyte sodium acetate, 16ppm (equivalent to the amount of monomeric acrylic acid) cross-linking agent N,N'-methylenebisacrylamide; in the oil phase, liquid paraffin oil is used as a solvent, and the surfactants are Span80 and Tween60 The mixture of the two, the mass ratio of the two is 2:1, and the mass fraction of the surfactant is 25% of the total mass of the oil phase. Slowly add the water phase solution into the oil phase, the stirrer speed is 100r / min, the reaction temperature is 40°C, feed nitrogen to keep the reaction in the anaerobic state, after deoxygenation for 20 minutes, add the initiator potass...

Embodiment 3

[0023]First, anionic organic particles were synthesized by inverse microemulsion polymerization. In the water phase, acrylic acid and acrylamide are used as monomers, the molar ratio of the two is 1:4, and the mass fraction of the monomers is 60% of the water phase. Add sodium hydroxide in an equimolar amount to acrylic acid, equivalent to the amount of monomers 0.4% electrolyte sodium acetate, 40ppm (equivalent to the amount of monomeric acrylic acid) crosslinking agent N,N'-methylenebisacrylamide; in the oil phase, liquid paraffin oil is used as a solvent, and the surfactants are Span80 and Tween60 The mixture of the two, the mass ratio of the two is 3:1, and the mass fraction of the surfactant is 40% of the total mass of the oil phase. Slowly add the water phase solution into the oil phase, the stirrer speed is 250r / min, the reaction temperature is 50°C, feed nitrogen to keep the reaction in the anaerobic state, after deoxygenation for 60 minutes, add the initiator potassiu...

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Abstract

The invention relates to a preparation method and application of an organic composite sodium modified bentonite microparticle retention and drainage aid; firstly, anionic organic microparticles are synthesized by inverse microemulsion polymerization method, to be more specific, acrylic acid and acrylamide are used as monomers in water phase, and sodium hydroxide, sodium acetate and a crosslinking agent are added; liquid paraffin oil is used as a solvent in oil phase, and a surfactant is a mixture of Span80 and Tween60; the water phase is slowly added into the oil phase, nitrogen is introduced for maintaining the reaction under anaerobic condition, initiator potassium persulfate and sodium bisulfite are added to obtain the anionic organic microparticles; then organic composite sodium modified bentonite microparticles are prepared, to be more specific, the anionic organic bentonite microparticles and sodium carbonate are added into bentonite, suitable amount of water is added, and organic composite sodium modified bentonite microparticles are prepared by grinding for reaction for a plurality of minutes. Compared with a conventional bentonite microparticle retention and drainage aid, the retention and drainage aid performance of the organic composite sodium modified bentonite microparticle retention and drainage aid is increased by about 15%.

Description

technical field [0001] The invention relates to a preparation method and application of an organic composite sodium-modified bentonite particle retention and drainage aid. Background technique [0002] In 1986, Langley, Litchfield and others combined bentonite particles and cationic polymers for the first time as a particle retention and drainage system, which was applied to the wet end of papermaking, which marked the emergence of particle retention and drainage systems. The retention and drainage aid system has excellent retention and drainage aid effects on paper materials, reduces the concentration of white water, increases the speed of the paper machine, and improves the product quality. Therefore, once it appears, it has been rapidly popularized and applied. At present, most paper machines at home and abroad are used Particulate retention and drainage systems have been employed. In this retention and drainage system, bentonite particles need to be modified by sodium t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/06C08F220/56C08F222/38C08F2/32D21H21/10D21H17/45D21H17/69
Inventor 夏新兴余小藏郭爱莲郭大亮胡谦
Owner ZHEJIANG SCI-TECH UNIV