Composite liquid chromium removal agent as well as preparation method and application thereof

A composite, liquid technology, applied in the field of chromium removal agent, can solve the problems of single reducing agent, inability to meet the requirements of chromium removal, and poor treatment effect.

Active Publication Date: 2021-10-08
安徽精公检测检验中心有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The existing technology often uses a single reducing agent, such as ferrous sulfate, as the reducing agent, and the treatment effect is not good
Moreover, ferrous sulfate is easily oxidized by oxygen in the air and becomes ineffective, resulting in a large amount of water-soluble hexavalent chromium remaining in the cement, which cannot meet the requirements for chromium removal

Method used

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  • Composite liquid chromium removal agent as well as preparation method and application thereof

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Embodiment 1

[0031] A composite liquid chromium remover, comprising the following raw materials in mass percentages:

[0032] 22% of ferrous sulfate heptahydrate, 15% of antimony oxychloride, 48% of water, 7% of absolute ethanol, 8% of methyl cellulose, and the viscosity of methyl cellulose is 40000mPa.s.

[0033] The preparation method of above-mentioned composite liquid chromium removal agent is:

[0034] A. Dissolve the formula amount of ferrous sulfate heptahydrate in the formula amount of water to form an aqueous solution of ferrous sulfate, then add the formula amount of methyl cellulose, stir for 30min, and obtain a mixed solution;

[0035] B. Add the formula amount of antimony oxychloride directly to the solution prepared in step A, stir for 60 minutes evenly, and then add the formula amount of organic solvent to obtain a composite liquid chromium remover.

[0036] Mix 5 kg of chromium-containing clinker and 211 g of dihydrate gypsum as a sample, add the composite liquid chromium ...

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Abstract

The invention provides a composite liquid chromium removal agent as well as a preparation method and application thereof. The composite liquid chromium removal agent comprises the following raw materials: 20-30% of ferrous sulfate heptahydrate, 10-30% of antimony oxychloride, 43-60% of water, 5-10% of an organic solvent and 2-10% of methyl cellulose, or 20-30% of ferrous sulfate heptahydrate, 10-30% of antimony trichloride, 43-60% of water, 5-10% of an organic solvent and 2-10% of methyl cellulose. The composite liquid chromium removal agent provided by the invention is a mixed phase of an organic phase and a water phase, ferrous sulfate heptahydrate and antimony oxychloride are combined through the organic solvent and methyl cellulose to jointly play a reduction role, and the chromium removal effect is better; and the addition of ferrous sulfate can prevent agglomeration of antimony oxychloride and methylcellulose, and ferrous sulfate in the system can be prevented from being oxidized by oxygen in air.

Description

technical field [0001] The invention belongs to the technical field of chromium removal agents, and in particular relates to a composite liquid chromium removal agent and its preparation method and application. Background technique [0002] Cement chromium reducer is mainly used in cement production to reduce hexavalent chromium in cement to trivalent chromium, thereby reducing the content of hexavalent chromium in cement. The country issued a mandatory national standard GB31893-2015 in 2016, which clearly limits the content of hexavalent chromium in cement to no more than 10mg / kg. [0003] The prior art often uses a single reducing agent, such as ferrous sulfate, as the reducing agent, and the treatment effect is not good. Moreover, ferrous sulfate is easily oxidized by oxygen in the air and becomes ineffective, resulting in more water-soluble hexavalent chromium remaining in the cement, which cannot meet the chromium removal requirements. Contents of the invention [0...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/38
CPCC04B40/0039C04B24/383C04B22/149C04B22/12C04B24/124C04B24/026
Inventor 李保军徐文祥轩红钟肖慧丽王莹刘梦雪丁松燕徐雪玲汪萍张亚楠
Owner 安徽精公检测检验中心有限公司
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