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A kind of recycling method of pyridoxal manganese-containing wastewater

A technology for pyridoxal and waste water, which is applied to the improvement of process efficiency and organic chemistry, can solve the problems of reduced Schiff base yield, increased cost, and poor quality of manganese carbonate, so as to save treatment costs, reduce production, good quality effect

Active Publication Date: 2020-05-08
江苏香地化学有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, we have found through research that there are still many defects in this method that can be further improved. For example, when the manganese-containing wastewater obtained by filtration is prepared into manganese carbonate precipitation, because p-aminophenethyl ether and pyridoxal Schiff base have a negative effect on manganese Ions have complex adsorption, resulting in poor quality of manganese carbonate generated, in order to achieve industrial utilization, manganese carbonate needs to be washed with a large amount of water, which has resulted in the generation of a large amount of waste water, and also increases the cost of waste water treatment; and, for amino The complex adsorption of phenetole and pyridoxal Schiff bases on manganese ions also led to a decrease in the yield of Schiff bases

Method used

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  • A kind of recycling method of pyridoxal manganese-containing wastewater
  • A kind of recycling method of pyridoxal manganese-containing wastewater
  • A kind of recycling method of pyridoxal manganese-containing wastewater

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Experimental program
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Effect test

Embodiment 1

[0036] Specific steps are as follows:

[0037] (1) with water as a reaction solvent, and manganese dioxide (30g) as an oxidant, the raw material pyridoxine (40g) is oxidized into pyridoxal to obtain a manganese-containing pyridoxal solution;

[0038] (2) 500mL of manganese-containing pyridoxal solution was added to the clean flask of 1000mL, and the manganese-containing pyridoxal solution was subjected to suction filtration to obtain manganese-containing pyridoxal filtrate and solid manganese dioxide, and the solid manganese dioxide was collected and reused ;

[0039] (3) Cool the manganese-containing pyridoxal to 35°C, and slowly add Na with concentrations of 5%, 10%, 15%, and 20% to the manganese-containing pyridoxal filtrate. 2 CO 3 The solution was adjusted to pH 7, and after 30 min of reaction, white manganese carbonate precipitate was produced, and the manganese carbonate solid and the pyridoxal solution were separated by suction filtration;

[0040] (4) pyridoxal sol...

Embodiment 2

[0045] Specific steps are as follows:

[0046] (1) with water as a reaction solvent, and manganese dioxide (30g) as an oxidant, the raw material pyridoxine (40g) is oxidized into pyridoxal to obtain a manganese-containing pyridoxal solution;

[0047] (2) 500mL of manganese-containing pyridoxal solution was added to the clean flask of 1000mL, and the manganese-containing pyridoxal solution was subjected to suction filtration to obtain manganese-containing pyridoxal filtrate and solid manganese dioxide, and the solid manganese dioxide was collected and reused ;

[0048] (3) The manganese-containing pyridoxal was cooled to 35° C., and the Na of the concentration of 15% was slowly added to the manganese-containing pyridoxal filtrate. 2 CO 3 The solution was adjusted to pH 5, 6, 7, 8, 9, 10 respectively, and after 30 min of reaction, white manganese carbonate precipitate was produced, and the manganese carbonate solid and the pyridoxal solution were separated by suction filtration;...

Embodiment 3

[0054] Specific steps are as follows:

[0055] (1) with water as a reaction solvent, and manganese dioxide (30g) as an oxidant, the raw material pyridoxine (40g) is oxidized into pyridoxal to obtain a manganese-containing pyridoxal solution;

[0056] (2) 500mL of manganese-containing pyridoxal solution was added to the clean flask of 1000mL, and the manganese-containing pyridoxal solution was subjected to suction filtration to obtain manganese-containing pyridoxal filtrate and solid manganese dioxide, and the solid manganese dioxide was collected and reused ;

[0057] (3) The manganese-containing pyridoxal was cooled to 35°C, and the NaHCO with a concentration of 15% was slowly added to the manganese-containing pyridoxal filtrate. 3 The solution was adjusted to pH 8, reacted for 10, 15, 20, 25, and 30 min respectively to produce white manganese carbonate precipitation, and the manganese carbonate solid and the pyridoxal solution were separated by suction filtration;

[0058]...

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Abstract

The invention discloses a recycling method for pyridoxal manganese-containing wastewater and belongs to the technical field of wastewater treatment. The method includes the steps that manganese-containing pyridoxal filtrate with manganese dioxide filtered out after filtering and a sodium carbonate solution or a sodium bicarbonate solution are subjected to a first-time reaction, then filtering is performed, and a pyridoxal solution and manganese carbonate solids are obtained; filtering is performed after the pyridoxal solution and p-phenetidine are subjected to a second-time reaction, and Schiff base solids and filtrate are obtained; and finally, the filtrate is filtered, and NaCL solids and recycled water are obtained. By utilizing the method, the concentration of Mn2+ in the pyridoxal manganese-containing wastewater can be effectively lowered to 0.5 mg / L, the manganese removing rate is increased to 95%, and the Schiff base yield is increased to 90%; and besides, the purity of manganese carbonate recycled through the method reaches up to 90%, and quality is good.

Description

technical field [0001] The invention relates to a method for recycling pyridoxal manganese-containing wastewater, belonging to the technical field of wastewater treatment. Background technique [0002] Schiff bases are a class of relatively stable imines with alkyl or aryl groups attached to nitrogen atoms, and have excellent liquid crystal properties. Schiff base compounds and their metal complexes are used in medicine, catalysis, analytical chemistry, corrosion and Important applications in the field of photochromism. In the medical field, Schiff bases have the biological activities of bacteriostatic, bactericidal, antitumor and antiviral; in the field of catalysis, the cobalt and nickel complexes of Schiff bases have been used as catalysts; in the field of analysis, Schiff bases are used as good catalysts. Ligands can be used to identify, identify metal ions and quantitatively analyze the content of metal ions; in the field of corrosion, some aromatic Schiff bases are of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B7/00C22B47/00C07D213/66
CPCC07D213/66C22B7/006C22B47/00Y02P10/20
Inventor 林伟蔡琦张玮琪于广陈礼伟
Owner 江苏香地化学有限公司
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