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Dechlorinating agent and preparation and use methods thereof

A technology of dechlorination agent and surfactant, which is applied in the direction of chemical instruments and methods, water pollutants, electrochemical water/sewage treatment, etc., can solve the problems of high dechlorination cost and many dechlorination process procedures, and improve the dechlorination process. Chlorine effect, high dechlorination efficiency, effect of fewer steps

Inactive Publication Date: 2019-04-12
BAIYIN YUANDIAN TECHNOLOGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of this, the application provides a dechlorination agent and its preparation and use method to solve the problems of high dechlorination cost and many dechlorination process procedures in the prior art

Method used

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  • Dechlorinating agent and preparation and use methods thereof
  • Dechlorinating agent and preparation and use methods thereof
  • Dechlorinating agent and preparation and use methods thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A dechlorination agent, including lead compound and silver compound, by mass percentage, the lead content is more than 27.5%, the silver content is 0%, and the rest is hydroxide and crystal water.

[0024] The preparation method comprises the following steps:

[0025] (1) Add silver nitrate in proportion to lead oxide to obtain initial mixture:

[0026] (2) Add sulfuric acid to the primary mixture prepared in step (1) to adjust to weak alkalinity, pH ≈ 7.5, to obtain a dechlorination agent, which is made into a 180-mesh powder.

[0027] The method of use includes the following steps:

[0028] (1) adding the dechlorination agent into water to obtain a mixed solution;

[0029] (2) Add polyethylene glycol distearate to the mixed solution obtained in step (1), and stir evenly to obtain a semi-stable suspension, which can be used for dechlorination.

[0030] Test detection: pour the semi-stable suspension used for dechlorination prepared in this example into the waste aci...

Embodiment 2

[0036] A dechlorination agent, including lead compound and silver compound, by mass percentage, the lead content is ≥ 27.5%, the silver content is 0.5%, and the rest is hydroxide and crystal water.

[0037] The preparation method comprises the following steps:

[0038] (1) Add silver nitrate in proportion to lead tetroxide to obtain initial mixture;

[0039] (2) Add sulfuric acid to the primary mixture prepared in step (1) to adjust to weak alkalinity, pH ≈ 7.5, to obtain a dechlorination agent, which is made into a 180-mesh powder.

[0040] The method of use includes the following steps:

[0041] (1) adding the dechlorination agent into water to obtain a mixed solution;

[0042] (2) Add polyethylene glycol distearate to the mixed solution obtained in step (1), and stir evenly to obtain a semi-stable suspension, which can be used for dechlorination.

[0043] Test detection: pour the semi-stable suspension used for dechlorination prepared in this example into the waste acid ...

Embodiment 3

[0049] A dechlorination agent, including lead compound and silver compound, in terms of mass percentage, the lead content is more than 27.5%, the silver content is 0.8%, and the rest is hydroxide and crystal water.

[0050] The preparation method comprises the following steps:

[0051] (1) Add silver nitrate in proportion to lead sulfate to obtain initial mixture;

[0052] (2) Add sulfuric acid to the initial mixture prepared in step (1) to adjust to weak alkalinity, pH ≈ 7.5, to obtain a dechlorination agent, which is made into a 220-mesh powder.

[0053] The method of use includes the following steps:

[0054] (1) adding the dechlorination agent into water to obtain a mixed solution;

[0055] (2) Add polyethylene glycol distearate to the mixed solution obtained in step (1), and stir evenly to obtain a semi-stable suspension, which can be used for dechlorination.

[0056] Test detection: pour the semi-stable suspension used for dechlorination prepared in this example into ...

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Abstract

The invention discloses a dechlorinating agent. The dechlorinating agent comprises lead and silver compounds. The mass percent of lead of the dechlorinating agent is not less than 27.5 %, while the mass percent of silver is greater than 0 % and less than or equal to 1.3%. The dechlorinating agent has high dechlorination efficiency, the dechlorination process has fewer steps, the operation processis simple, the raw materials used in the dechlorinating agent are cheap and easy to obtain, and the dechlorination cost is greatly reduced. A small amount of silver is added into the dechlorinating agent, after silver is added, a small amount of chloride ions in a solution also can be enriched into the solid for full oxidization, lead and silver in the dechlorinating agent have the synergistic effect on dechlorination, and the dechlorination effect of the dechlorinating agent is further improved.

Description

technical field [0001] The invention relates to the technical field of dechlorination agents, in particular to a dechlorination agent and its preparation and use methods. Background technique [0002] The removal of chloride ions in sulfuric acid or phosphoric acid systems has always been a difficult problem in the chemical and hydrometallurgical industries. In these industries, some waste acids rich in chloride ions are often produced. Due to the existence of chloride ions, this waste acid is difficult to be used in conventional production. Used as a raw material, for example: in the spot zinc industry, in order to prevent the corrosion of the stainless steel equipment used in production and the anode plate during electrolysis, the chloride ion content is specified to be ≤300mg / l, but the solution system is often caused by the use of chlorine-containing raw materials Chloride ion exceeds the standard. [0003] Usually use bismuth or copper as raw material in the existing d...

Claims

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Application Information

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IPC IPC(8): C02F1/46C02F1/72C02F101/12
CPCC02F1/46C02F1/72C02F2101/12
Inventor 申鸿志
Owner BAIYIN YUANDIAN TECHNOLOGY CO LTD
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