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Method for refining glutaraldehyde

A refining method, glutaraldehyde technology, applied in the preparation of heterocyclic compounds, organic chemistry, etc., can solve the problems of darkening of polymerization color, inability to guarantee product color, and failure to meet the requirements of medical grade purification, and achieve the operation process easy effect

Active Publication Date: 2008-05-14
WUHAN YOUJI IND
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Problems solved by technology

[0006] Due to its own structure, glutaraldehyde is more active, unstable when heated, prone to polymerization, and the color becomes dark and yellow. The usual industrial distillation method cannot meet the requirements of medical grade purification, and even in the case of decolorization, it cannot guarantee The color of the product is lower than 60
Therefore, it is more difficult to manufacture medical glutaraldehyde by existing methods

Method used

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  • Method for refining glutaraldehyde
  • Method for refining glutaraldehyde
  • Method for refining glutaraldehyde

Examples

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Embodiment

[0027] In a 10,000L reactor, add metered water, 3,4-dihydropyran-2-methyl ether and phosphoric acid catalyst successively, and carry out hydrolysis reaction at 50-90°C for 0.5-2 hours to obtain a concentration of 15-35%. Semi-finished product of glutaraldehyde aqueous solution. The semi-finished product is separated from methanol according to the process flow shown in Figure 1. The temperature of the material when it enters the rectification tower is controlled at 50-95°C, and the vacuum degree of the rectification system is controlled at 0.60-0.96Mpa; after separating methanol, 53.6% The concentrated glutaraldehyde aqueous solution has a chromaticity of No. 60 and a methanol content of 0.35%. After the upper material is decolorized and filtered according to the process flow shown in Figure 2, the glutaraldehyde aqueous solution with a chroma of No. 30 is obtained, and then 15 to 30% NaH 2 PO 4 The pH of the liquid is adjusted to 3.0-5.0, and distilled water is added for pre...

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Abstract

The invention discloses a method for refining medical glutaraldehyde. The refining process of the method is to separate the methanol from the hydrolyzed semi-finished product by negative pressure flash distillation-rectification and steam stripping combination method, then decolorize, filter, and then blend to obtain the finished product. The technological operation process of the invention is simple and stable, and is suitable for industrialized production.

Description

technical field [0001] The invention relates to a method for manufacturing chemical products, in particular to a method for refining medical glutaraldehyde. Background technique [0002] Glutaraldehyde is an important organic chemical fine chemical and intermediate. As a high-efficiency, broad-spectrum fungicide, it is widely used in oil fields, papermaking, metal processing and other fields; glutaraldehyde is also used as a tanning agent in In the leather industry. In recent years, the application of glutaraldehyde is mainly concentrated in the fields of medicine and sanitation. As a disinfectant, it is also widely used in medical engineering, biochemistry, immunochemistry, microbial industry, food and environmental protection. Glutaraldehyde is a third-generation chemical sterilant, which has a high killing effect on reproductive bacteria, viruses, mycobacteria, pathogenic molds and bacterial buds. It is recommended by the World Health Organization ...

Claims

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Application Information

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IPC IPC(8): C07C47/12C07C45/59
Inventor 邹晓虹毛利民
Owner WUHAN YOUJI IND
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