Recovery method for waste water of 1,4-dihydroxyanthraquinone production

A technology of dihydroxyanthraquinone and recovery method, which is applied in the direction of chemical instruments and methods, water/sewage treatment, water/sludge/sewage treatment, etc., and can solve the problems of waste of resources, environment, pollution, poor effect of treatment and recovery technology, etc. To achieve the effect of eliminating pollution and saving resources

Inactive Publication Date: 2005-03-16
湖北开元化工科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is exactly to provide a kind of 1,4--the recovery method of dihydroxy anthraquinone process waste water, it adopts the technological process of concentrating, cooling, cr...

Method used

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  • Recovery method for waste water of 1,4-dihydroxyanthraquinone production

Examples

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Embodiment 1

[0018] Put 1750ml of waste water into a 2000ml beaker, and add a few grains of zeolite, place the beaker containing the liquid on a 1KW electric furnace, heat it to boiling, evaporate and concentrate it until the concentration of sulfuric acid in the solution is 20%, stop heating, and then put the beaker containing the concentrated liquid into a water bath Cool in medium, and keep stirring with a glass rod. When the material is cooled to 30°C, a large amount of crystals will precipitate and stay for one hour. Then filter the slurry on a Buchner funnel to obtain 800ml of 20% sulfuric acid solution. The filter cake is in CLS101- Dry in an E-type oven at 100°C-110°C to obtain 25g of a mixture of phthalic acid, boric acid, and 2-hydroxyl-5-chloro-6'-carboxybenzophenone.

Embodiment 2

[0020] Put 1750ml of waste water into a 2000ml beaker, and add a few grains of zeolite. Put the beaker containing the liquid on a 1KW electric furnace and heat it to boil. When the concentration of sulfuric acid in the solution reaches 30%, stop heating, and then put the beaker containing the concentrated liquid into a water bath. Cool in medium temperature and keep stirring with a glass rod. When the material is cooled to below 15°C, a large amount of crystals will precipitate out and stay for one hour. Filter the slurry on a Buchner funnel to obtain 570ml of 30% sulfuric acid solution. The filter cake is in CLS101- Dry in an E-type oven at 100°C-110°C to obtain 31g of a mixture of phthalic acid, boric acid, and 2-hydroxyl-5-chloro-6'-carboxybenzophenone.

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Abstract

The invention discloses a recovery method for waste water of 1,4-dihydroxyanthraquinone productionwhich consists of subjecting 1,4-dihydroxyanthraquinone processing waste water to condensation till sulfuric acid concentration is 20%-80%, cooling to 30-0 deg. C for crystallization, proceeding solid-liquid separation, the filtered body is 20-80% of sulfuric acid, finally drying the filter cakes.

Description

technical field [0001] The present invention relates to a method for recovering 1,4-dihydroxyanthraquinone process wastewater, in particular to a recovery method for phthalic acid, boric acid, 2-hydroxyl- 5-chloro-6'-carboxybenzophenone mixture and sulfuric acid method. Background technique [0002] There are currently two treatment methods for 1,4-dihydroxyanthraquinone process wastewater: one is to process wastewater through neutralization, flocculation, biochemical, decolorization and other treatment processes; the other is to recover phthalic acid through low-temperature crystallization, and then undergo Neutralization, flocculation, biochemical, decolorization and other treatment processes. The waste water recovery rate of the above method is low, a large amount of alkali is needed for neutralization, the treatment cost is high, and it is difficult to discharge up to the standard, resulting in a large waste of resources and environmental...

Claims

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Application Information

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IPC IPC(8): C02F1/00C02F1/58
Inventor 谢争兵
Owner 湖北开元化工科技股份有限公司
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