Hydrogen Peroxide Purification Resin Adsorption Method

Hydrogen peroxide, also known as hydrogen peroxide, was discovered in France in 1818 and can be used as a bleaching agent (pulp bleaching accounts for 50% of the total amount of hydrogen peroxide used) to disinfect Liu, oxidize, and synthesize raw materials. Due to the fact that the final products of hydrogen peroxide decomposition are water and oxygen, without any pollution, it is an environmentally friendly oxidant that deserves great development and application.

At present, almost all domestic and foreign production of hydrogen peroxide adopts the anthraquinone method, which produces a small amount of anthraquinone organic compounds during the hydrogen peroxide production process. As the operating time of the device increases, the content of anthraquinone organic compounds will also increase. Converted into organic carbon content, it is generally below 300ppm, but sometimes it can reach 400ppm or even higher with the extension of the device operating time.

The organic carbon in hydrogen peroxide can seriously affect the quality of products. For example, in the production of caprolactam, the ketoxime process is mainly used. In traditional oximation and Beckman rearrangement reactions, cyclohexanone, ammonia, and hydrogen peroxide are placed in the same reactor to synthesize cyclohexanone oxime in one step. Therefore, hydrogen peroxide is the main raw material for the synthesis of caprolactam, and the concentration of organic carbon in hydrogen peroxide needs to be reduced to below 50ppm. If hydrogen peroxide with excessive organic carbon content is used for the production of cyclohexanone oxime, this organic matter will be carried into the final product caprolactam, which will affect the purity of the product.

Therefore, hydrogen peroxide needs to be purified. In order to remove these organic impurities from hydrogen peroxide products, many purification methods have been developed since the 1950s, which can be summarized as follows: distillation, adsorption, ion exchange, extraction, crystallization, membrane separation, and combinations of several methods.

The commonly used methods in industry now are distillation and ion exchange resin purification. Distillation is generally used to concentrate hydrogen peroxide because organic compounds have a high boiling point, so they are enriched and removed from the non vaporized liquid, thereby purifying the hydrogen peroxide. However, due to incomplete gas-liquid separation and the carrying of misty liquids, volatile organic compounds will enter the distillation system with hydrogen peroxide vapor, so the purity is generally not very high. There are currently several publicly available patents for the purification method of hydrogen peroxide ion exchange resin, including the use of organic carbon adsorption combined with cation exchange method. The second method is to use a mixture of anion and cation exchange resin and mixed bed ion exchange resin. The third method is to use macroporous adsorption resin combined with cation exchange resin for treatment.

In summary, the ion exchange resin purification method can not only remove organic carbon, but also remove some metal ion impurities such as Fe, Al, Sn ions. However, in practical applications, resin is prone to decomposition, strength reduction, and the formation of gelatinous solids, leading to problems such as resin blockage, high processing costs, poor separation efficiency, and insufficient purity.

To solve the problems of easy decomposition, low strength, and poor purification effect of adsorption resins used for hydrogen peroxide purification in existing technologies, Haipu Functional Materials Co., Ltd. has treated the adsorption resin with specific methods to improve its physical structure. When applied to hydrogen peroxide purification, it has good purification effect, significantly improved strength and adsorption desorption ability.