7 results about "Peroxy acid" patented technology

A method for controlling microbial growth in a sugar processing system is disclosed, wherein the method comprises adding a peroxy acid into water of a flume system used for transporting a sugar-containing plant material from a delivery or storage location to a wash system. In one non-limiting example embodiment, the sugar-containing plant material comprises sugar beets, and the peroxy acid comprises peracetic acid.

This invention discloses a soil remediation agent, its preparation method, and its application. The soil remediation agent comprises a humic acid-based remediation agent and an encapsulated microbial remediation agent; it contains an oyster shell pretreatment agent and a chitosan pretreatment agent; the oyster shell pretreatment agent comprises active calcium and zinc oxide; the zinc oxide coats at least a portion of the surface of the active calcium; the active calcium is formed by sequentially calcining and hydrating oyster shells; the chitosan pretreatment agent is formed by activating chitosan with inorganic peroxide. This invention utilizes the loose and porous framework structure of calcined oyster shells and modified chitosan to provide a porous matrix for humic acid and microorganisms, preparing a combined physicochemical adsorption and microbial adsorption degradation remediation agent. This not only efficiently solves the problem of heavy metal pollution in soil, but also provides a stable remediation agent structure that can be recycled after remediation, effectively removing heavy metals from the soil and preventing secondary pollution.

The present application relates to the chemical technology field, disclose a kind of preparation method of anhydrous peroxy acid product and the preparation method of caprolactone.The preparation method of anhydrous peroxy acid product includes the following steps: (1) in the presence of homogeneous acidic catalyst, hydrogen peroxide is reacted with organic acid, then the reaction product is divided into water phase and peroxy acid phase;(2) the homogeneous acidic catalyst in the peroxy acid phase is removed.The preparation method of caprolactone includes: the anhydrous peroxy acid product is oxidized with cyclohexanone.The method can catalyze the synthesis of peroxy acid with homogeneous acidic catalyst, can keep high synthesis efficiency of peroxy acid, and by removing homogeneous acidic catalyst from peroxy acid product, the refined anhydrous oxygen acid product is used for oxidizing cyclohexanone to prepare caprolactone, which can improve the selectivity and yield of caprolactone.

Topical formulations comprising peroxyacids prepared in situ from trichloroacetic acid, dichloroacetic acid, monochloroacetic acid or acetic acid and hydrogen peroxide are useful for promoting hair growth and for preventing hair loss.

This invention discloses a preparation process for the co-production of alicyclic epoxy resin and glycidyl ester epoxy resin, comprising the following steps: mixing epoxy resin raw materials, solvent, and hydrogen peroxide; adding acid anhydride to the reaction system in batches; filtering the reaction system after the reaction is completed to separate the liquid phase and by-product acid solid; obtaining alicyclic epoxy resin through a series of operations on the liquid phase; adding wet by-product acid solid and continuing to react with epichlorohydrin to finally obtain the corresponding glycidyl ester epoxy resin; and performing an epoxidation reaction by using cyclic anhydrides such as hexahydrophthalic anhydride and phthalic anhydride in combination with hydrogen peroxide to generate corresponding peroxy acids. The generated by-product dicarboxylic acid and excess raw material anhydride can be directly filtered out from the reaction system and used directly as raw materials for the production of glycidyl ester epoxy resin, thereby achieving the co-production of alicyclic epoxy resin and glycidyl ester epoxy resin.

The present invention relates to the field of chemical engineering technology, and in particular, to a method for preparing caprolactone and a method for preparing an anhydrous peroxy acid product. The method for preparing caprolactone comprises: (1) in the presence of a homogeneous acidic catalyst, reacting hydrogen peroxide with an organic acid, and dehydrating the resultant reaction product to give a peroxy acid phase comprising the homogeneous acidic catalyst; (2) removing the homogeneous acidic catalyst in the peroxy acid phase to give the anhydrous peroxy acid product; and (3) subjecting the anhydrous peroxy acid product and cyclohexanone to an oxidation reaction. According to the method of the present invention, the peroxy acid is synthesized by using a homogeneous acidic catalyst, and the anhydrous peroxy acid product can be prepared by first dehydrating and then removing the catalyst. By oxidizing cyclohexanone with the anhydrous peroxy acid product to produce caprolactone, high caprolactone selectivity and yield can be achieved.

This invention discloses a method for synthesizing 4-phenoxyphenol by BV oxidation based on continuous flow technology, belonging to the field of organic synthesis technology. The process of this invention does not use liquid acids such as peroxyacids or concentrated sulfuric acid, but instead uses a precisely designed and easily separated and recovered solid catalyst, resulting in good safety and environmental friendliness. This invention constructs a green reaction system, utilizing the high mass and heat transfer efficiency of microreactors to transform a strongly exothermic reaction into a safe, controllable, and precise continuous process, solving the scale-up effect. The overall process has low by-products, high yield, conforms to green chemistry principles, and is suitable for industrial production.