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Method for preprocessing neopentyl glycol industrial wastewater by catalytic oxidation

A technology for the production of neopentyl glycol and wastewater, applied in the direction of oxidized water/sewage treatment, chemical instruments and methods, molecular sieve catalysts, etc., to achieve the effects of reducing organic loads, low cost, and broad prospects for engineering applications

Inactive Publication Date: 2011-07-20
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Due to the inhibitory effect of formaldehyde on microorganisms, the wastewater produced by disproportionation neopentyl glycol is not suitable for direct biological treatment, and there is currently no effective treatment method

Method used

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  • Method for preprocessing neopentyl glycol industrial wastewater by catalytic oxidation
  • Method for preprocessing neopentyl glycol industrial wastewater by catalytic oxidation
  • Method for preprocessing neopentyl glycol industrial wastewater by catalytic oxidation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Take 2.0 grams of copper nitrate to make a copper nitrate solution with a mass fraction of 2.0%; then weigh 20.0 grams of γ-Al 2 o 3 Added to 2.0% copper nitrate solution, the catalyst active component, that is, copper nitrate, was evenly distributed in the γ-Al by equal volume impregnation method. 2 o 3 The catalyst was impregnated for 2 hours, dried at a constant temperature of 100°C for 8 hours, and calcined at 300°C for 3 hours.

Embodiment 2

[0023] Take 1.0 gram of ferric nitrate and make it into a 1.0% ferric nitrate solution; then weigh 20.0 grams of γ-Al 2 o 3 Added to 1.0% ferric nitrate solution, the active component of the catalyst, namely copper nitrate, was evenly distributed in the γ-Al 2 o 3 The catalyst was soaked for 1 hour, then dried at 80°C for 9 hours, and calcined at 200°C for 4 hours.

Embodiment 3

[0025] Take 6.0 grams of copper nitrate to make a copper nitrate solution with a mass fraction of 6.0%; then weigh 20.0 grams of γ-Al 2 o 3 Added to 6.0% copper nitrate solution, the catalyst active component, that is, copper nitrate, was evenly distributed in the γ-Al 2 o 3 The catalyst was impregnated for 2 hours, dried at a constant temperature of 100°C for 8 hours, and calcined at 300°C for 3 hours.

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Abstract

The invention discloses a method for preprocessing neopentyl glycol industrial wastewater by catalytic oxidation. The invention is to remove formaldehyde and some organic matters from wastewater under a certain condition by adding a catalyst and 30wt% of hydrogen peroxide in the wastewater. The method for preparing the catalyst comprises the following steps: adding a porous inorganic oxide carrier in metal nitrate solution or acetate solution with mass fraction of 1.0-6.0% and mixing uniformly; dipping for a certain time; and drying and baking to obtain the catalyst. The removing rate of formaldehyde is above 89%, the removing rate of CODcr is above 50%, and preprocessed neopentyl glycol industrial wastewater can be processed thoroughly to meet emission standard by a common biological method.

Description

technical field [0001] The invention relates to a method for catalytic oxidation pretreatment of neopentyl glycol production wastewater, which belongs to the technical field of wastewater treatment. Background technique [0002] Neopentyl glycol (Neopentyl glycol, NPG) is a white crystal, mainly used in the production of saturated polyester resins, unsaturated polyester resins, polyester polyols and esters used in synthetic lubricants, polymer plasticization Agents and alkyd resins, etc. Neopentyl glycol derivatives are widely used in the fields of automobiles, textiles, medicine, coatings, pesticides, plastics and petroleum. Saturated polyester resins produced from neopentyl glycol outperform resins prepared from ethylene glycol (which has problems with crystallization) and propylene glycol (which has problems with hydrolysis). The neopentyl structure makes powder coatings and high-solid component coatings prepared from such resins have excellent fluidity, flexibility, ch...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/72B01J23/72B01J23/745B01J23/755B01J29/00B01J23/89B01J23/34C02F103/36
Inventor 魏琴王晓东杜斌吴丹郑显鹏魏东姚振兴司维
Owner UNIV OF JINAN
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