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Processing agent for phosphate residues and preparation method thereof

A technology of treatment agent and phosphating slag, which is applied in the field of phosphating slag, can solve the problems of reduced heat transfer effect, good effect of slag removal agent, and poor effect, and achieve the effects of ensuring anti-corrosion protection and improving cleaning and complexing effects

Inactive Publication Date: 2010-01-06
天津市永华科贸发展有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the inside of the phosphating tank is uneven and there are many pipes, so manual cleaning is very difficult and the effect is not good, especially the pipes, pumps, valves, and the inner wall of the heat exchange cannot be cleaned at all. After a long time, the pipes will be blocked and the heat exchange effect will be reduced. This is a more difficult problem in production
At present, the solution to this problem is to rely on diluted nitric acid to clean, but the disadvantages of this cleaning method are: nitric acid will damage the on-site personnel, and at the same time, it is highly corrosive to equipment, especially after cleaning, the residual nitrate radicals are harmful to phosphating. liquid can be harmful
[0004] In addition, a slag remover produced by introducing Japanese technology works well, but it is expensive, and the market price is 15,000 to 20,000 yuan / ton

Method used

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preparation example Construction

[0016] A preparation method of phosphating slag treatment agent, comprising the following steps:

[0017] A. Weighing materials:

[0018] B. Feeding:

[0019] (1) First add water to the enamel container, then add hydrochloric acid under slow stirring, and then circulate and stir for 30 minutes;

[0020] (2) Slowly add organic acid, urotropine, thiourea, and tetraethylammonium oxalate in turn and stir in circulation for 1 hour to ensure that the product is fully uniform;

[0021] C. Filtration: The fully uniform product is filtered through a filter and put into a storage tank.

Embodiment 1

[0022] Embodiment 1: the preparation method of phosphating slag treatment agent

[0023] A. Weighing raw materials: Strictly weigh all kinds of materials;

[0024] B. Feeding: First, add 503kg of water into the enamel container, then gradually add 350kg of hydrochloric acid under slow stirring, and then circulate and stir for 30 minutes; slowly add 100kg of organic acid, 30kg of urotropine, 10kg of thiourea, tetraoxalic acid Ethyl ammonium 7kg was circulated and stirred for 1 hour to ensure that the product was fully uniform.

[0025] C. Filtration: The fully uniform product is filtered through a filter and put into a storage tank.

[0026] The working process of the present invention is: (1) Put the agent into the liquid tank, pump it into the phosphating pipeline for circulation, and stop the circulation after the phosphating slag is completely dissolved, and put the solution into a plastic bucket, such as solution There is still complexing ability, that is, take 100ml of ...

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PUM

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Abstract

The invention discloses a processing agent for phosphate residues and a preparation method thereof. The processing agent comprises the following components by mass: 35 grams of hydrochloric acid, 10 grams of organic acid, 3 grams of urotropine, 1 gram of thiourea, 0.7 gram of butane dicarboxylic acid tetraethylammonium as a complexing agent and 50.3 grams of water. The method has the advantages of fully ensuring the anticorrosion equipment protection and improving cleaning and complexing effect by adding a relatively large amount of corrosion inhibitor in the raw materials. The processing agent is suitable for the phosphate residue generated in a phosphating process of phosphoric solutions of a zinc phosphate series, a zinc calcium phosphate series, a ferric phosphate series, a manganese phosphate series and the like. The process can be operated at normal temperature. Currently, the market price of the processing agent is about 5,000 Yuan / ton.

Description

technical field [0001] The invention relates to a phosphating slag produced after phosphating treatment of workpieces in the steel products industry such as automobiles, a phosphating slag treating agent capable of treating the phosphating slag and a preparation method thereof. Background technique [0002] With the development of steel products industries such as automobiles and home appliances, the requirements for product quality are more stringent. Especially, automobile products are treated with phosphating before painting to improve the performance of the paint film. But phosphating is a relatively complex chemical reaction process, that is, a chemical corrosion and deposition process. During the whole process, a certain amount of multivariate chemical sediment, namely, phosphating slag, will be produced, which is in the form of white particles. The existence of phosphating slag will affect the production quality. In addition to filtering and removing during the prod...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C11D7/34C11D7/32C11D7/26C23C22/07
Inventor 黄桂英
Owner 天津市永华科贸发展有限责任公司