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208 results about "Triketone" patented technology

A triketone or trione is a molecule containing three ketone groups. Simple cyclic triketones include cyclopropanetrione, barbituric acid and the triazine cyanuric acid. Croconic acid also has hydroxy groups. In ninhydrin one of the ketone groups is normally hydrated.

System and method for continuously synthesizing clethodim

The invention belongs to the technical field of chemical product synthesis, and relates to a micro-reaction system and method for synthesizing herbicide clethodim. The system is formed by sequentiallyconnecting a micro-channel reactor I, a micro-channel reactor II and a collector in series. The synthesis method comprises the following steps of: by taking an ethanol solution of 5-[2-(ethanethiol)propyl]- 2-propionyl-1, 3-cyclohexanedione (referred to as refined triketone) and chloroallyloxyamine (referred to as chloroamine) as raw materials, respectively and continuously conveying the raw materials into the micro-channel reactor I through a metering pump to realize strong mixing and reaction; and continuing to mix and react the reacted materials in the micro-channel reactor II, controlling the temperature of the system through a heat exchanger, enabling the reaction product to enter the collector, and carrying out acid washing separation to obtain the product clethodim. According to the system and the method, low-energy-consumption, safe and continuous production of clethodim can be realized, the conversion rate of refined triketone is higher than 99% under the condition that themolar ratio of chloramine to refined triketone is 1.20, and the yield of the product clethodim is higher than 95%.
Owner:DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI

Carboxylic acid compound containing phosphorus, nitrogen and boron, preparation method thereof and preparation method and application of flame-retardant epoxy resin

ActiveCN111732607AAvoid harmOvercome the influence of physical and mechanical propertiesGroup 5/15 element organic compoundsArylPolymer science
The invention relates to the technical field of materials, in particular to a carboxylic acid compound containing phosphorus, nitrogen and boron, a preparation method thereof and a preparation methodand application of flame-retardant epoxy resin. The molecular structure of the carboxylic acid compound contains phosphaphenanthrene, triazinetrione, boric acid or organic boric acid groups and carboxyl, the molecular structure of the carboxylic acid compound has two forms which are TMDB-1 and TMDB-2, and the specific formulae are shown in the specification, wherein R1 and R2 are any one of hydroxyl, alkyl and aryl. The carboxylic acid compound containing phosphorus, nitrogen and boron is a reactive halogen-free flame retardant, so that the harm of a halogen-containing flame retardant to a human body and the environment is avoided, and the influence of an additive flame retardant on the physical and mechanical properties of an epoxy resin matrix is overcome. The carboxylic acid compound provided by the invention endows an epoxy/anhydride system with excellent flame retardancy and smoke suppression performance, and also can improve the mechanical properties to a certain extent, and theflexural modulus and flexural strength of flame-retardant epoxy resin are both improved.
Owner:WUHAN UNIV OF TECH
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