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Polycarboxylic acid dispersing agent, phosphogypsum slurry, and preparation methods and applications of polycarboxylic acid dispersing agent and phosphogypsum slurry

A technology of polycarboxylic acid and dispersant, which is applied in mining equipment, earth square drilling, filling, etc. It can solve the problems of poor slump performance, easy pipe plugging, high viscosity, etc., achieve good slump performance and improve dispersion performance , the effect of good activity matching

Active Publication Date: 2020-04-10
佳化化学(上海)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Therefore, the technical problem to be solved by the present invention is to overcome the shortcomings of the phosphogypsum slurry in the prior art, such as poor slump retention performance, easy bleeding, high viscosity, and easy plugging of pipes during long-distance slurry pumping, and provide A kind of polycarboxylic acid dispersant, phosphogypsum slurry and their preparation method and application

Method used

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  • Polycarboxylic acid dispersing agent, phosphogypsum slurry, and preparation methods and applications of polycarboxylic acid dispersing agent and phosphogypsum slurry
  • Polycarboxylic acid dispersing agent, phosphogypsum slurry, and preparation methods and applications of polycarboxylic acid dispersing agent and phosphogypsum slurry

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Effect test

Embodiment 1

[0049] The present embodiment provides a kind of polycarboxylic acid dispersant and preparation method thereof, specifically comprises the following steps:

[0050] The configuration of the mixed aqueous solution of acrylic acid and chain transfer agent: dissolve 5kg of acrylic acid and 0.25kg of chain transfer agent mercaptoethanol in 32kg of water, mix well, and set aside;

[0051] Configuration of the reducing agent aqueous solution: dissolve 0.1kg of reducing agent-modified white powder in 1kg of water, mix well, and set aside;

[0052] Dissolve 30kg of VOPEG (number-average molecular weight: 1200) in 25kg of water, then add 0.5kg of hydrogen peroxide as an oxidizing agent, and after stirring evenly, add the above-mentioned mixed aqueous solution of acrylic acid and chain transfer agent dropwise within 30 minutes at 15°C; then within 40 minutes Add the above reducing agent aqueous solution dropwise; after reacting for 1 hour, add sodium hydroxide for neutralization to obta...

Embodiment 2

[0054] The present embodiment provides a kind of polycarboxylic acid dispersant and preparation method thereof, specifically comprises the following steps:

[0055] The configuration of the mixed aqueous solution of acrylic acid and chain transfer agent: dissolve 8kg of acrylic acid and 0.2kg of chain transfer agent sodium methylpropanesulfonate in 30kg of water, mix well, and set aside;

[0056] Configuration of the reducing agent aqueous solution: dissolve 0.2kg of reducing agent vitamin C in 3kg of water, mix well, and set aside;

[0057] Dissolve 35kg of VOPEG (number average molecular weight: 1000) in 30kg of water, then add 0.3kg of ammonium persulfate as an oxidant, after stirring evenly, add the mixed aqueous solution of the above-mentioned acrylic acid and chain transfer agent dropwise within 35min at 10°C; then within 50min Add the above reducing agent aqueous solution dropwise; after reacting for 1 hour, add sodium hydroxide for neutralization to obtain the polycarb...

Embodiment 3

[0059] The present embodiment provides a kind of polycarboxylic acid dispersant and preparation method thereof, specifically comprises the following steps:

[0060] The configuration of the mixed aqueous solution of acrylic acid and chain transfer agent: dissolve 6kg of acrylic acid and 0.3kg of chain transfer agent mercaptopropionic acid in 30kg of water, mix well, and set aside;

[0061] The configuration of the reducing agent aqueous solution: dissolve 0.15kg reducing agent modified hanging white block in 2kg water, mix well, and set aside;

[0062] Dissolve 34kg of VOPEG (number average molecular weight: 5000) in 25kg of water, then add 0.3kg of oxidant hydrogen peroxide, after stirring evenly, add the above mixed aqueous solution of acrylic acid and chain transfer agent dropwise within 45min at 12°C; then within 60min Add the above reducing agent aqueous solution dropwise; after reacting for 1 hour, add sodium hydroxide for neutralization to obtain the polycarboxylic acid...

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Abstract

The invention provides a polycarboxylic acid dispersing agent, a phosphogypsum slurry, and preparation methods and applications of the polycarboxylic acid dispersing agent and the phosphogypsum slurry, wherein the polycarboxylic acid dispersing agent comprises the following raw materials: VOPEG, and the VOPEG is a mixture of 4-hydroxybutyl vinyl polyoxyethylene ether and 4-hydroxybutyl vinyl polyoxyethylene polyoxybutylene ether. According to the invention, by adding VOPEG, the activity matching degree of the VOPEG and a micromolecular monomer acrylic acid is good based on the copolymerizationactivity of the high-activity double bonds linked with oxygen atoms in the VOPEG, and the positions of the double bonds are not isomerized, so that the side chain comb-shaped structure of the synthesized polycarboxylic acid dispersing agent is stretched, and the degree of freedom is good; and the polycarboxylic acid dispersing agent has dispersing function and also has functions of viscosity reduction, good collapse prevention performance and bleeding resistance, reduces the risk of the pipe blockage of a phosphogypsum slurry in a long-distance pumping process when the polycarboxylic acid dispersing agent is applied to the phosphogypsum slurry, and can adapt to different types of phosphogypsum backfill materials.

Description

technical field [0001] The invention relates to the technical field of tailings filling, in particular to a polycarboxylic acid dispersant, a phosphogypsum slurry and a preparation method and application thereof. Background technique [0002] my country is a large agricultural country, and there is a huge demand for phosphate fertilizer every year. With the rapid development of the phosphate fertilizer industry, the discharge of its by-product, phosphogypsum, shows a blowout growth trend, with an annual output of up to 50 million tons. Due to the impact of phosphogypsum on the environment The pollution is relatively large, and it takes a lot of manpower and material resources to deal with it every year. Therefore, in recent years, the comprehensive utilization of phosphogypsum is an urgent problem to be solved. [0003] At present, the comprehensive application fields of phosphogypsum mainly include: the underground goaf filling project using phosphogypsum as the main filling...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/26C04B28/14C08F283/06C08F220/06E21F15/00C04B103/40
CPCC04B24/2694C04B28/143C08F283/065E21F15/005C04B2103/408C04B2111/00724C04B2111/00146C08F220/06C04B24/121C04B24/383C04B24/122C04B2103/445C04B22/062
Inventor 刘东亚何新耀李玉博
Owner 佳化化学(上海)有限公司
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