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H acid waste water by natrium chloratum addition process

A sodium chloride and waste water technology, applied in the direction of adding substances to water/sewage treatment, heating water/sewage treatment, oxidized water/sewage treatment, etc., can solve problems such as waste of resources, difficult biological treatment, toxicity, etc.

Inactive Publication Date: 2009-07-29
王国华
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

H acid production wastewater is very toxic to the environment, difficult to biological treatment, and quite harmful
[0003] In the production process of H acid, in order to increase the yield of H acid, a lower pH value is often adjusted, so that the wastewater produced by H acid is strongly acidic and highly corrosive to buildings. A large amount of water is required to dilute it when discharged. extremely wasteful of resources

Method used

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  • H acid waste water by natrium chloratum addition process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Example 1: Take 100 mL of H-acid waste water from Chuyuan Chemical Plant in Shishou City, Hubei Province, add 11 grams of sodium chloride, dissolve it, and distill it to obtain 96 mL of hydrochloric acid. Use methanol to ultrasonically extract the remaining solids to obtain H-acid and T-acid 1 gram, 1.5 grams of ammonium chloride was obtained as a solid after heating and extraction at 400 degrees, and 7 grams of anhydrous sodium sulfate were obtained after high-temperature oxidation at 950 degrees.

Embodiment 2

[0022] Example 2: Take 100 mL of H-acid waste water from Chuyuan Chemical Plant in Shishou City, Hubei Province, add 11 grams of sodium chloride to dissolve it, and distill it to obtain hydrochloric acid. The difference is that the solid is extracted by Soxhlet to obtain 1.7 grams of H-acid , indicating that Soxhlet cycle extraction can increase the yield of H acid and T acid.

Embodiment 3

[0023] Example 3: Take 100 mL of H-acid waste water from Chuyuan Chemical Plant in Shishou City, Hubei Province, add 11 grams of sodium chloride to dissolve it, distill it to obtain hydrochloric acid, and then directly heat it at 400 degrees without extraction to obtain ammonium chloride 1.7 gram, 7 grams of anhydrous sodium sulfate were obtained after high-temperature oxidation. It shows that the omission of extraction does not affect the yield of ammonium chloride and anhydrous sodium sulfate.

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Abstract

The invention discloses a disposing method of making H acid waste water reach zero discharge, which comprises the following steps: adding common salt into waste water; distilling out of alcaine; extracting out of H acid and T acid from the remain solid; heating the solid; getting ammonii chloridum; pyrogenic oxidizing remain solid; getting anhydrous sodium sulfate.

Description

technical field [0001] The invention relates to a treatment method capable of achieving zero discharge of H-acid wastewater. Background technique [0002] H acid is an important dye intermediate, mainly used in the production of direct dyes, acid dyes and reactive dyes. H acid production wastewater is very toxic to the environment, difficult to biological treatment, and quite harmful. [0003] In the production process of H acid, in order to increase the yield of H acid, a lower pH value is often adjusted, so that the wastewater produced by H acid is strongly acidic and highly corrosive to buildings. A large amount of water is required to dilute it when discharged. Extremely wasteful of resources. Contents of the invention [0004] The main components in H acid wastewater are: sulfuric acid, ammonium sulfate, sodium sulfate, H acid, T acid and organic impurities. [0005] According to the components in the H-acid wastewater, add a certain degree of sodium chloride, intr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/04C02F1/68C02F1/04C02F1/26C02F1/72C01C1/16C01D5/00C01B7/03C07C303/44C07C309/50
Inventor 王国华
Owner 王国华