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Processing method for waster water generated in the process of synthesizing vanilline by glyoxylate method

A technology of glyoxylic acid method and treatment method, which is applied in natural water body treatment, water/sewage multi-stage treatment, adsorbed water/sewage treatment, etc., can solve problems such as difficult to meet discharge requirements

Inactive Publication Date: 2009-11-18
JIAXING ZHONGHUA CHEM
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Problems solved by technology

There is a high proportion of aromatic compounds in the wastewater, which is still di

Method used

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  • Processing method for waster water generated in the process of synthesizing vanilline by glyoxylate method

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Effect test

Embodiment 1

[0032] Weigh 10 grams of D101 macroporous adsorption resin (purchased from Bengbu Liaoyuan New Material Co., Ltd.), put it into a 500ml single-mouth bottle, add 350ml pH3. Cr 6100mg / L, shake in a constant temperature shaking tank at 25-30°C for 1 hour, filter out the resin, and pass the detection of COD Cr Dropped to 985mg / L. Add 0.1 g of ferrous sulfate to the waste water after resin adsorption, then add 10 g of 30% hydrogen peroxide, heat to 55-60 ° C under stirring conditions for 30 min, and detect COD again Cr Dropped to 78mg / L, reaching the national first-level emission standard.

[0033] Put the resin obtained by filtering after the above adsorption into another 100ml single-mouth bottle, add 50ml of 95% ethanol and shake in a constant temperature shaking tank at 25-30°C for 1 hour to desorb the adsorbed organic matter. After desorption, the resin It can be reused more than 50 times.

Embodiment 2

[0035] In a Add 400ml of XDA-1 macroporous adsorption resin (purchased from Xi’an Electric Power Resin Factory) into the 40mm×450mm chromatography column, and heat the outside of the column by electric heating to keep the temperature inside the column at 35±3°C. The pH is 3.5. Glyoxylate vanillin production wastewater is immersed in the resin. After 60 minutes, the vanillin production wastewater is added from the top at a rate of 500ml per hour. At the same time, the wastewater after adsorption treatment is collected from the bottom. The cumulative amount of wastewater that can be treated reaches 10908ml. After testing the COD of wastewater before adding Cr is 5827mg / L, COD of wastewater after adsorption Cr It is 857mg / L. Then add 5% (w / v) sodium hydroxide solution 250ml in 1 hour to carry out desorption, obtain the aromatic compound through enrichment, its COD Cr It is 12509mg / L.

[0036] Add 2 grams of ferrous sulfate to the wastewater after resin adsorption treatment, ...

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Abstract

The invention relates to a processing method for waster water generated in the process of synthesizing vanilline by a glyoxylate method, which comprises the following steps of: macroporous resin is adopted for selectively adsorbing aromatic compound in vanilline industrial wastewater so as to effectively reduce the concentration of the organic waster in waster water; and COD drops down to about 1000 mg/L; afterwards, green copperas is added into wastewater adsorbed by the resin, namely, oxyful oxidation treatment degrades the aromatic compound; the COD in the waster water is reduced to about 100 mg/L to reach the national-level discharge standard.

Description

technical field [0001] The invention relates to a method for treating organic waste water, in particular to a method for treating waste water produced in the process of synthesizing vanillin by glyoxylic acid method. Background technique [0002] Vanillin is an important spice and food additive, which is widely used in flavoring various foods and daily chemical products. Currently, the global annual usage has reached about 17,000 tons. Yuan Hong comprehensively discussed the technology of ethyl vanillin synthesized by glyoxylic acid method in the article "New Technology of Domestic Glyoxylic Acid Synthesis of Ethyl Vanillin and Development Trend" (China Food Additives, z1, 2003). The glyoxylic acid method is also the most commonly used vanillin synthesis method in the world at present. Compared with the traditional nitrosylation method, it has the characteristics of relatively low cost and easy treatment of three wastes. The vanillin obtained by this production Accounting f...

Claims

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Application Information

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IPC IPC(8): C02F9/04C02F1/72C02F1/28C02F103/36
Inventor 邹炳其杜德祥周永军何国良毛海舫
Owner JIAXING ZHONGHUA CHEM
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