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Deep treatment and reuse method for polycarbonate wastewater

A polycarbonate, wastewater treatment technology, applied in water/sewage treatment, natural water treatment, adsorbed water/sewage treatment, etc., can solve the problems of inorganic salt reuse, uneconomical, large consumption of activated carbon, etc., to achieve the treatment capacity The effect of improving and reducing the equipment footprint and improving the transfer speed

Active Publication Date: 2018-10-16
WANHUA CHEM GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Adopt steam stripping+acidic precipitation+activated carbon adsorption process in CN103739136A, because the content of volatile organic matter in the waste water is low, the stripping effect is not obvious, and bisphenol A content is still higher in the waste water after the acidic precipitation, followed by activated carbon adsorption process Activated carbon consumes a lot and is not economical
Moreover, the above process only treats the organic matter in the wastewater, but does not further reuse a large amount of inorganic salts in the wastewater, so the overall economic benefit is not high
Patents CN101888971B, CN101519491B, CN101863772B, etc. all use electrolysis process to further recover useful substances in wastewater after pretreatment of wastewater, but the disadvantage is that electrolysis has strict requirements on the water inlet index of wastewater (TOC3 - or SO 4 2- Azide and sulfide gases will be produced respectively, and there is a risk of explosion, and the residue of organic matter in the wastewater will directly affect the quality of the product

Method used

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  • Deep treatment and reuse method for polycarbonate wastewater
  • Deep treatment and reuse method for polycarbonate wastewater
  • Deep treatment and reuse method for polycarbonate wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0085] Embodiment 1: the preparation of 1# catalyst

[0086] Take 15 g of the spherical alumina carrier and place it in a vacuum impregnation bottle for vacuum pretreatment, vacuum treatment for 20 minutes, and the vacuum degree is 99.0KPa. Take 6ml of cobalt nitrate aqueous solution containing 0.10g / ml of cobalt, 5.4ml of nickel nitrate aqueous solution containing nickel 0.1g / ml, 3.0ml of copper nitrate aqueous solution containing copper 0.10g / ml, 3.75ml of manganese nitrate aqueous solution containing manganese 0.1g / ml ml, added to the aqueous ethanol solution with an ethanol concentration of 10 wt%, to prepare an impregnating solution with a total volume of 26 ml. Add the impregnating liquid into the vacuum impregnation bottle equipped with the above-mentioned spherical alumina carrier, mix evenly, impregnate the above-mentioned spherical alumina carrier with equal volume, after immersion for 30 minutes, take it out and dry it in an oven at 135°C for 5 hours, and then put i...

Embodiment 2

[0088] Embodiment 2: the preparation of 2# catalyst

[0089] Take 15 g of the spherical alumina carrier and place it in a vacuum impregnation bottle for vacuum pretreatment. The vacuum treatment is carried out for 30 minutes, and the vacuum degree is 98.0 KPa. Take 7.5ml of cobalt nitrate aqueous solution containing cobalt 0.10g / ml, 4.5ml of nickel nitrate aqueous solution containing nickel 0.1g / ml, 2.7ml of copper nitrate aqueous solution containing copper 0.10g / ml, and manganese nitrate aqueous solution of 0.1g / ml 3ml was added into the aqueous ethanol solution with ethanol concentration of 10wt%, to prepare an impregnation solution with a total volume of 26ml. Add the impregnating liquid into the vacuum impregnation bottle equipped with the above-mentioned spherical alumina carrier, mix evenly, impregnate the above-mentioned spherical alumina carrier with an equal volume, after immersion for 120min, take it out and dry it in an oven at 120°C for 4h, and then put it in a Ca...

Embodiment 3

[0091] Embodiment 3: the preparation of 3# catalyst

[0092] Take 15g of spherical alumina carrier and put it in a vacuum impregnation bottle, carry out vacuum pretreatment, vacuum treatment for 25min, and the vacuum degree is 96.0KPa. Take 10.5 ml of cobalt nitrate aqueous solution containing 0.10 g / ml of cobalt, 9 ml of nickel nitrate aqueous solution containing nickel 0.1 g / ml, 4.2 ml of copper nitrate aqueous solution containing 0.10 g / ml of copper, and 2.25 ml of manganese nitrate aqueous solution containing 0.1 g / ml of manganese. ml, added to the aqueous ethanol solution with an ethanol concentration of 10 wt%, to prepare an impregnating solution with a total volume of 26 ml. Add the impregnating solution into the vacuum impregnation bottle equipped with the above-mentioned spherical alumina carrier, mix evenly, impregnate the above-mentioned spherical alumina carrier with equal volume, after 60 minutes of immersion, take it out and dry it in an oven at 105°C for 6 hours...

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Abstract

The invention provides a deep treatment and reuse method for polycarbonate wastewater. The deep treatment and reuse method comprises: (1) carrying out first pH value adjusting on polycarbonate wastewater by using an acid, filtering, carrying out second pH value adjusting on the filtered wastewater by using an alkali, and treating sequentially in a catalytic oxidation unit and an efficient adsorption unit; and (2) removing inorganic salts from the wastewater treated in the step (1) through bipolar membrane electrodialysis treatment, and recovering the corresponding acid and the corresponding alkali. With the method of the present invention, the treated high-concentration polycarbonate wastewater can meet the discharge standard and the corresponding acid and the corresponding alkali can be recovered, such that the problem of the treatment of the high-concentration salt-containing organic wastewater is solved, and the effective substances can be recycled.

Description

technical field [0001] The invention relates to a polycarbonate wastewater advanced treatment and reuse method, belonging to the technical field of environmental protection wastewater treatment. Background technique [0002] As an engineering plastic with excellent comprehensive properties, polycarbonate has high transparency, impact resistance, heat resistance and aging resistance, and has a wide range of applications in glass assembly, automobile industry and electronics industry. However, a large amount of high-salt organic wastewater is produced in the production process, especially the bisphenol A in the wastewater has carcinogenic effect and is difficult to biodegrade. Its high-salt characteristics also make it impossible to use biochemical methods for treatment. Improper wastewater treatment will cause great harm to the environment. influences. [0003] At present, polycarbonate wastewater in the industry is usually treated by advanced oxidation or adsorption methods...

Claims

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Application Information

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IPC IPC(8): C02F9/06C02F101/30C02F103/38
CPCC02F1/28C02F1/285C02F1/4693C02F1/66C02F1/725C02F9/00C02F2001/007C02F2101/30C02F2103/38
Inventor 王俊俊段美荣范珍龙曾凡雪张宏科华卫琦
Owner WANHUA CHEM GRP CO LTD