Flocculating agent for sand washing and mineral separation and preparation method thereof

A technology of flocculant and initiator, which is applied in the field of flocculant for sand washing and beneficiation and its preparation, can solve the problems of limiting the use of polyacrylamide, high cost, high price of polyacrylamide, etc., and achieves fast settling speed and reduced Manufacturing costs, the effect of realizing environmentally friendly utilization

Pending Publication Date: 2022-05-10
云南森博混凝土外加剂有限公司
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AI Technical Summary

Problems solved by technology

However, the synthesis of polyacrylamide is mainly based on acrylic acid and acrylamide. The cost of acrylic acid and acrylamide is very high due to the shortage of production technology and raw materials, which directly leads to the high price of polyacrylamide, which seriously limits the production capacity of polyacrylamide. Use as a flocculant

Method used

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  • Flocculating agent for sand washing and mineral separation and preparation method thereof
  • Flocculating agent for sand washing and mineral separation and preparation method thereof

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preparation example Construction

[0030] A preparation method of flocculant for sand washing ore dressing, characterized in that it comprises the following steps:

[0031] S1. At normal temperature, put the waste acid into the stirred reactor, put in the basic salt and modifier in turn, and stir for 0.5~1h; after the reaction, continue to put in the catalyst, then raise the temperature to 80~110℃, and reflux for 12~ After 24h, it was naturally cooled to room temperature.

[0032] S2. Add liquid caustic soda to the S1 solution to adjust the pH to 7-8, then lower the temperature to ≤6°C, catalyze nitrogen and deoxygenate for 30 minutes, then continue to add chain transfer agent and azo initiator in sequence, and stir for 5 to 10 minutes before reacting Add reducing agent and persulfate initiator in sequence, continue to react for 5 to 10 minutes, stop stirring and let stand for 2 to 10 hours to obtain colloid flocculant, then granulate the colloid, and put it in a vacuum oven at 75 to 85°C for 6 After ~8 hours, i...

Embodiment 2

[0034] At normal temperature, put 835 parts of waste acid into the stirred reactor, then put in 48 parts of sodium carbonate and 62 parts of ammonium hydroxide, and stir for 0.5h; The temperature was raised to 110°C, and the reaction was refluxed for 12 hours, and then naturally cooled to room temperature. Then add 15 parts of liquid caustic soda to the above solution to adjust the pH to 7.6, then lower the temperature to ≤6°C, catalyze nitrogen and deoxygenate for 30 minutes, then continue to add 0.3 parts of sodium formate and 0.15 parts of azobisisobutylamidine hydrochloride in sequence, and stir for 5 Add 0.28 parts of sodium bisulfite and 0.05 parts of sodium persulfate in turn after 10 minutes, continue to react for 5 minutes, stop stirring and let stand for 6 hours to obtain colloid flocculant, then granulate the colloid, and dry in a vacuum oven at 75°C for 8 hours After crushing, the flocculant for sand washing and beneficiation can be obtained.

Embodiment 3

[0036] At room temperature, put 886 parts of waste acid into a stirred reactor, then put in 60 parts of sodium bicarbonate and 75 parts of hydroxyammonium chloride, and stir for 1 hour; after the reaction, continue to put in 0.007 parts of indium fluoride trihydrate and 0.003 parts of four Hydrate cobalt acetate, then heat up to 80°C, reflux for 24 hours, then cool down to room temperature naturally. Then add 28 parts of liquid caustic soda to the above solution to adjust the pH to 7.4, then lower the temperature to ≤6°C, and then continue to add 0.3 parts of isopropanol and 0.008 parts of azobisisopropylimidazoline hydrochloride successively after nitrogen and oxygen removal for 30 minutes. Stir the reaction for 5 minutes, then add 0.015 parts of ferrous sulfate and 0.002 parts of potassium persulfate in turn, continue the reaction for 10 minutes, stop stirring and let it stand for 2 hours to obtain a colloidal flocculant, then granulate the colloid and place it in a vacuum ov...

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Abstract

The invention discloses a flocculating agent for sand washing and mineral separation and a preparation method of the flocculating agent. The flocculating agent comprises the following components in parts by weight: 835-886 parts of waste acid, 62-75 parts of a modifier, 0.001-0.01 part of a catalyst, 0.01-0.2 part of an initiator, 0.015-0.28 part of a reducing agent, 0.3-0.8 part of a chain transfer agent, 36-60 parts of basic salt and 15-28 parts of liquid caustic soda. Wherein the waste acid is the waste acid generated in the methionine production process and comprises acrolein, acrylic acid and water, the content of the acrolein is 7.2%-8.4%, the content of the acrylic acid is 8.6%-10.2%, and the content of the water is 78.3%-80.6%; according to the product and the method disclosed by the invention, the high-efficiency flocculating agent for sand washing and mineral separation is prepared by taking waste acid generated in a methionine production process as a synthetic raw material, so that the production cost of the flocculating agent is reduced, and meanwhile, harmless and resourceful treatment of the waste acid is realized.

Description

technical field [0001] The invention belongs to the technical field of flocculant preparation, in particular to a flocculant for sand washing ore dressing and a preparation method thereof. Background technique [0002] Methionine is widely used in many fields such as biology, medicine, feed, food, etc. Its production process can be roughly divided into extraction method, protein hydrolysis method, microbial method and chemical synthesis method. And other disadvantages, it is still in the experimental stage and cannot be put into mass production. At present, the industrial production process of methionine mainly adopts the acrolein method, and propylene is used as raw material to produce acrolein, and then methionine is produced. However, a large amount of waste acid will be produced in the production process of using acrolein method to synthesize methionine. The waste acid contains a large number of dangerous chemical components such as acrolein and acrylic acid, which need...

Claims

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Application Information

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IPC IPC(8): C08F220/06C08F220/56C02F1/56
CPCC08F220/06C02F1/56C08F220/56Y02P10/20
Inventor 苏玉玲徐顺涛张武民吴晓勇马懿凡唐凯徐兴卫
Owner 云南森博混凝土外加剂有限公司
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