Resource utilization method of high-salinity organic wastewater formed in light stabilizer 944 production

A light stabilizer and organic wastewater technology, applied in chemical instruments and methods, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc., can solve problems such as incomplete oxidation, harmful by-products, and low reaction rate , to achieve the effect of small secondary pollution, small footprint and high treatment efficiency

Inactive Publication Date: 2016-06-29
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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Problems solved by technology

When ozone alone degrades organic pollutants in water, the following disadvantages exist: low reaction rate with many organic compounds, incomplete oxidation, formation of harmful by-products

Method used

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  • Resource utilization method of high-salinity organic wastewater formed in light stabilizer 944 production

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Use a pump to transport the high-salt organic wastewater formed by the production of light stabilizer 944 into the reactor from the bottom of the reactor. There is a catalyst bed in the reactor, and a gas distributor is installed at the lower part of the catalyst bed; after passing the air through the ozone generator, Then enter the catalyst bed through the gas distributor at the bottom of the reactor, the organic matter in the wastewater and ozone undergo an oxidation reaction on the catalyst surface in the reactor, and the macromolecular organic matter insoluble in water in the high-salt wastewater is oxidized into water-soluble organic matter; The final effluent flows out from the upper part of the reactor; the reaction temperature in the catalytic ozonation reactor is room temperature, the reaction pressure is normal pressure, the gas-water ratio is 70, the ozone concentration is 70mg / L, and the catalyst amount of 1.0wt.% Mn / activated carbon is 50mL , the waste water...

Embodiment 2

[0035] Use a pump to transport the high-salt organic wastewater formed by the production of light stabilizer 944 into the reactor from the bottom of the reactor. There is a catalyst bed in the reactor, and a gas distributor is installed at the lower part of the catalyst bed; after passing the air through the ozone generator, Then enter the catalyst bed through the gas distributor at the bottom of the reactor, the organic matter in the wastewater and ozone undergo an oxidation reaction on the catalyst surface in the reactor, and the macromolecular organic matter insoluble in water in the high-salt wastewater is oxidized into water-soluble organic matter; The final effluent flows out from the upper part of the reactor; the reaction temperature in the catalytic ozonation reactor is room temperature, the reaction pressure is normal pressure, the gas-water ratio is 70, the ozone concentration is 80mg / L, and the catalyst amount of 1.2wt.% Fe / molecular sieve is 50mL , the waste water ...

Embodiment 3

[0037] Use a pump to transport the high-salt organic wastewater formed by the production of light stabilizer 944 into the reactor from the bottom of the reactor. There is a catalyst bed in the reactor, and a gas distributor is installed at the lower part of the catalyst bed; after passing the air through the ozone generator, Then enter the catalyst bed through the gas distributor at the bottom of the reactor, the organic matter in the wastewater and ozone undergo an oxidation reaction on the catalyst surface in the reactor, and the macromolecular organic matter insoluble in water in the high-salt wastewater is oxidized into water-soluble organic matter; The final effluent flows out from the upper part of the reactor; the reaction temperature in the catalytic ozonation reactor is room temperature, the reaction pressure is normal pressure, the gas-water ratio is 70, the ozone concentration is 90mg / L, and 2.0wt.% Co / TiO 2 The amount of catalyst is 50mL, and the space velocity of w...

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Abstract

Light stabilizer 944 is a polymeric high molecular weight hindered amine light stabilizer used for plastic products, high-salinity organic wastewater may be produced in light stabilizer 944 production process, and the high-salinity organic wastewater is difficult to handle with conventional biochemical methods. The present invention relates to a resource utilization method of the high-salinity organic wastewater formed in the light stabilizer 944 production, and belongs to the field of high-salinity degradation-resistant organic wastewater treatment. The method comprises five operating units of catalytic ozone oxidation, evaporation and crystallization, filtration, washing and drying. The resource utilization method of the high-salinity organic wastewater has the advantages of simple process, high treatment efficiency, small secondary pollution, small footprint, recyclable resources and the like. A saturated saline solution with TOC (total organic carbon) less than 10mg / L, prepared from the high purity sodium chloride recovered by the method can be used as an ionic membrane caustic soda preparation raw material. By use of the method, an economical and development-recyclable green light stabilizer 944 production process can be achieved in enterprises.

Description

technical field [0001] The invention relates to a resource utilization method of high-salt organic wastewater formed by the production of light stabilizer 944. First, the catalytic ozonation process is used to oxidize the water-insoluble macromolecular organic matter in the high-salt organic wastewater formed by the production of light stabilizer 944 into water-soluble The water-soluble organic matter is removed by evaporative crystallization, filtration, washing and drying processes, and high-purity sodium chloride is obtained at the same time to realize the resource utilization of pollutants, which belongs to the field of high-salt refractory organic wastewater treatment. Background technique [0002] Light Stabilizer 944 is a polymeric high molecular weight hindered amine light stabilizer for plastic products. It can be used in polyolefin plastics (such as PP, PE), olefin copolymers (such as EVA and the mixture of propylene and rubber, etc.). Application in cross-linked ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/10
Inventor 卫皇曌孙承林孙文静王亚旻王森于杨李敬美
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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