Concentrated phosphoric acid anti-deposition agent and preparation method thereof

An anti-deposition agent, phosphoric acid technology, applied in the direction of phosphoric acid, phosphorus oxyacids, chemical instruments and methods, etc., can solve the problem of continuous normal operation affected by scale removal, and achieve slow formation of easily scaled substances, enhanced stability, Anti-scaling effect

Pending Publication Date: 2020-02-28
WUHAN QIANGSHENG TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the scale cleaning seriously affects the continuous normal operation of production, it has brought great economic losses to the enterprise

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Add 10% of acrylic acid, 30% of methyl acrylate monomer, 4% of sulfonate, 7% of isopropanol and 40% of deionized water into the polymerization reactor, control the temperature at 36°C±41°C, and start stirring Stir the reactor evenly, then add the prepared aqueous solution of ammonium persulfate dropwise to the reaction kettle for 50 minutes. After the dropwise addition, raise the temperature of the reaction kettle to 90°C, turn on the condenser to reflux and moisturize for 1.5 hours, and distill out the reaction After remaining isopropanol, obtain the polymer such as first acrylic acid multi-component copolymer;

[0019] Measure 15% of acrylic acid, 25% of hydroxypropyl acrylate, 5% of AMPS, 7% of isopropanol and 40% of deionized water into the polymerization reactor, control the temperature at 36°C±40°C, and start the stirrer to stir evenly. Then add the prepared ammonium persulfate aqueous solution dropwise to the reaction kettle, and the dropping time is 55 minutes. ...

Embodiment 2

[0022] Add 12% of acrylic acid, 32% of methyl acrylate monomer, 5% of sulfonate, 9% of isopropanol and 45% of deionized water into the polymerization reactor, control the temperature at 36°C±41°C, and start stirring Stir the reactor evenly, then add the prepared aqueous solution of ammonium persulfate dropwise to the reaction kettle for 50 minutes. After the dropwise addition, raise the temperature of the reaction kettle to 90°C, turn on the condenser to reflux and moisturize for 1.5 hours, and distill out the reaction After remaining isopropanol, obtain the polymer such as first acrylic acid multi-component copolymer;

[0023] Add 17% of acrylic acid, 27% of hydroxypropyl acrylate, 6% of AMPS, 8% of isopropanol and 45% of deionized water into the polymerization reactor by mass percentage, control the temperature at 36°C±40°C, and start the stirrer to stir evenly. Then add the prepared ammonium persulfate aqueous solution dropwise to the reaction kettle, and the dropping time ...

Embodiment 3

[0026] Add 15% of acrylic acid, 34% of methyl acrylate monomer, 7% of sulfonate, 11% of isopropanol and 50% of deionized water into the polymerization reactor, control the temperature at 36°C±41°C, and start stirring Stir the reactor evenly, then add the prepared aqueous solution of ammonium persulfate dropwise to the reaction kettle for 50 minutes. After the dropwise addition, raise the temperature of the reaction kettle to 90°C, turn on the condenser to reflux and moisturize for 1.5 hours, and distill out the reaction After remaining isopropanol, obtain the polymer such as first acrylic acid multi-component copolymer;

[0027] Measure 20% of acrylic acid, 30% of hydroxypropyl acrylate, 7% of AMPS, 11% of isopropanol and 50% of deionized water into the polymerization reactor, control the temperature at 36°C±40°C, and start the stirrer to stir evenly. Then add the prepared ammonium persulfate aqueous solution dropwise to the reaction kettle, and the dropping time is 55 minutes...

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Abstract

The invention relates to a concentrated phosphoric acid anti-deposition agent which comprises the following components in parts by weight: 8-10 parts of amino trimethylene phosphoric acid, 3-5 parts of phosphonocarboxylic acid, 17-33 parts of a first acrylic acid multi-element copolymerized isopolymer, 33-42 parts of a second acrylic acid multi-element copolymerized isopolymer, 6-10 parts of 2-phosphono-1, 2, 4-butane tricarboxylate, and 30-40 parts of polymaleic anhydride. The anti-deposition agent containing a surfactant and organic active substances can generate a certain inhibition effecton nucleation and crystallization of potassium fluosilicate and sodium fluosilicate, and the scale inhibition rate in a laboratory can reach 80% or above; and the effect of the industrial test is good. Therefore, by selecting the additive, scaling can be effectively slowed down, and scaled substances are loosened, so that the start-up rate of a wet-process phosphoric acid filtering system is favorably improved, the scaled substance cleaning time is shortened, the purposes of increasing the yield and reducing the consumption are achieved, and the application and popularization values are great.

Description

technical field [0001] The invention relates to the field of concentrated phosphoric acid anti-deposition agent, in particular to a concentrated phosphoric acid anti-deposition agent and a preparation method thereof. Background technique [0002] In the production process of dihydrate wet-process phosphoric acid, potassium, sodium, silicon and harmful impurities in phosphate rock are likely to cause fouling of filtration, concentration equipment and pipelines. The scale is hard and difficult to clean, seriously affecting normal production. Since the formation of scales has a great relationship with the impurity content of phosphate rock, and process indicators and pipe materials also have a great impact on scaling, there is no complete solution at home and abroad at present. Many phosphate fertilizer plants have adopted a series of measures, such as lowering the acid hydrolysis temperature of phosphate rock, increasing heat preservation measures, changing the filter plate s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B25/234C01B25/22
CPCC01B25/2346C01B25/22
Inventor 陈明祥盛先芳
Owner WUHAN QIANGSHENG TECH CO LTD
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