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A kind of anti-scaling dispersant for wet-process phosphoric acid concentration system and its preparation method

A technology of scale inhibitor dispersant and concentration system, which is applied in chemical instruments and methods, phosphorus compounds, scale removal and water softening, etc. Improve utilization, low cost of use, prevent the formation and deposition of sulfate scale and silicate scale

Active Publication Date: 2021-07-20
SHANDONG TAIHE WATER TREATMENT TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the above-mentioned problems of small scope of application of scale inhibitors for pipelines of phosphoric acid concentration equipment, large doses of chemicals and high production costs, the present invention provides a scale inhibitor dispersant for wet-process phosphoric acid concentration systems

Method used

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  • A kind of anti-scaling dispersant for wet-process phosphoric acid concentration system and its preparation method
  • A kind of anti-scaling dispersant for wet-process phosphoric acid concentration system and its preparation method

Examples

Experimental program
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Effect test

Embodiment 1

[0027] A kind of anti-scaling dispersant used in wet-process phosphoric acid concentration system, consists of the following raw materials in parts by weight:

[0028] 2-Phosphono-1,2,4-tricarboxylic butane 12%

[0029] Aminotrimethylene phosphonic acid 25%

[0030] Dihexenetriaminepentamethylenephosphonic acid 4%

[0031] Acrylic acid-2-acrylamide-2-methylpropanesulfonic acid copolymer 20%

[0032] Deionized water 39%

[0033] (1) Raise the temperature of the water in the reactor to 80~85°C, and comonomer acrylic acid monomer and 2-acrylamide-2-methylpropanesulfonic acid monomer (acrylic acid monomer and 2-acrylamide-2- The mass ratio of methylpropanesulfonic acid monomer is 1:1) and the initiator are added to the reaction kettle at the same time, after the addition is completed, the temperature is raised to 95±2°C and the reaction is kept for 1 hour, and the temperature is lowered to obtain acrylic acid-2-acrylamide-2- Methylpropanesulfonic acid copolymer, its solid cont...

Embodiment 2

[0040] A kind of anti-scaling dispersant used in wet-process phosphoric acid concentration system, consists of the following raw materials in parts by weight:

[0041] 2-Phosphono-1,2,4-tricarboxylic butane 10%

[0042] Aminotrimethylene phosphonic acid 30%

[0043] Dihexenetriaminepentamethylenephosphonic acid 5%

[0044] Acrylic acid-2-acrylamide-2-methylpropanesulfonic acid copolymer 15%

[0045] Deionized water 40%

[0046](1) Raise the temperature of the water in the reactor to 80~85°C, and comonomer acrylic acid monomer and 2-acrylamide-2-methylpropanesulfonic acid monomer (acrylic acid monomer and 2-acrylamide-2- The mass ratio of methylpropanesulfonic acid monomer is 1.5:1) and the initiator are added to the reaction kettle at the same time, after the addition is completed, the temperature is raised to 95±2°C and the reaction is kept for 1 hour, and the temperature is lowered to obtain acrylic acid-2-acrylamide-2- Methylpropanesulfonic acid copolymer, its solid con...

Embodiment 3

[0053] A kind of anti-scaling dispersant used in wet-process phosphoric acid concentration system, consists of the following raw materials in parts by weight:

[0054] 2-Phosphono-1,2,4-tricarboxylic butane 15%

[0055] Aminotrimethylene phosphonic acid 30%

[0056] Dihexenetriaminepentamethylenephosphonic acid 5%

[0057] Acrylic acid-2-acrylamide-2-methylpropanesulfonic acid copolymer 20%

[0058] Deionized water 30%

[0059] (1) Raise the temperature of the water in the reactor to 80~85°C, and comonomer acrylic acid monomer and 2-acrylamide-2-methylpropanesulfonic acid monomer (acrylic acid monomer and 2-acrylamide-2 - The mass ratio of methylpropanesulfonic acid monomer is 1.3:1) and the initiator are added to the reaction kettle at the same time, after the addition is completed, the temperature is raised to 95±2°C and the reaction is kept for 1 hour, and the temperature is lowered to obtain acrylic acid-2-acrylamide-2 - methyl propane sulfonic acid copolymer, its soli...

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Abstract

The invention discloses a scale-inhibiting and dispersing agent for a wet-process phosphoric acid concentration system. Composed of methylene phosphonic acid, acrylic acid-2-acrylamide-2-methyl propane sulfonic acid copolymer and deionized water. The antiscaling and dispersing agent of the present invention has a large temperature application range, and can effectively prevent the formation and deposition of sulfate scale and silicate scale in the equipment pipeline of the concentration process of the wet phosphoric acid preparation process. The antiscaling and dispersing agent provided by the present invention is used according to the concentration It is calculated that 50~100μg / g is added to the pipeline of the wet-process phosphoric acid concentration equipment, which can prolong the operation period, improve the utilization rate of the equipment, and reduce the production cost.

Description

technical field [0001] The invention relates to a scale-inhibiting dispersant, in particular to a scale-inhibiting dispersant used in a wet-process phosphoric acid concentration system and a preparation method thereof. Background technique [0002] The fouling of the process pipeline of the wet-process phosphoric acid plant mainly occurs on the slurry pipe, the acid return pipe and the finished dilute phosphoric acid pipe, followed by the primary and secondary washing liquid pipes of the filtration system and the finished acid pipe of the concentration device, and in different The two major factors affecting the operation cycle of the phosphoric acid plant in the process flow stage are the fouling and clogging of the filter equipment itself and the fouling and clogging of the process pipeline in the concentration process. Scale measures, the usual method is to wait until the pipeline blockage can not meet the production needs to stop and clean or call the cleaned spare pipel...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F5/14C02F5/12C01B25/234
CPCC01B25/234C02F5/125C02F5/145C02F2303/22
Inventor 王东宇程终发李响王宁宁齐晓婧杨修艳王东海
Owner SHANDONG TAIHE WATER TREATMENT TECH CO LTD