760-42-9Relevant articles and documents
PRODUCTION METHOD OF PERFLUOROALKADIENE COMPOUND
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Paragraph 0046; 0056-0058, (2021/01/15)
PROBLEM TO BE SOLVED: To provide a method capable of obtaining a perfluoroalkandiene compound in a high yield while reducing the generation amount of impurities which are difficult to separate. SOLUTION: The production method is a method for producing a perfluoroalkandiene compound represented by the general formula (1): CF2=CF-(CF2)n-4-CF=CF2 (1) [in the formula, n represents an integer of 4 to 20.] and comprises a reaction step of reacting a compound represented by the general formula (2): CF2X1-CFX2-(CF2)n-4-CF2-CF2X3 (2) [in the formula, n is the same as defined above; X1, X2 and X3 are the same or different, X1 and X2 represent a halogen atom, and X3 represents a chlorine atom, a bromine atom or an iodine atom, provided that both X1 and X2 are not fluorine atoms] in the presence of a nitrogen-containing compound and zinc or a zinc alloy in an organic solvent in which the reaction step includes a mixing step of sequentially mixing a solution including zinc or a zinc alloy and an organic solvent, a nitrogen-containing compound and the compound represented by the general formula (2). SELECTED DRAWING: None COPYRIGHT: (C)2021,JPOandINPIT
Preparation method of 1,1,1,2,4,4,4-heptafluoro-2-butene
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Paragraph 0027; 0028; 0229; 0030; 0031; 0036; 0041, (2019/01/07)
The invention discloses a preparation method of 1,1,1,2,4,4,4-heptafluoro-2-butene. The method uses hexachlorobutadiene and hydrogen fluoride as raw materials and uses a chromium-based catalyst as a fluorine-chlorine exchange catalyst to form the 1,1,1,2,4,4,4-heptafluoro-2-butene under gas phase conditions through a plurality of gas-phase catalytic reactions. Compared with the prior art, the preparation method of the 1,1,1,2,4,4,4-heptafluoro-2-butene provided by the invention has the following advantages: 1, the gas phase fluorination method adopted in the method is a cycle fluorination method, has less three industrial wastes (waste water, waste gases and solid waste), and greatly reduces the production costs; 2, the method can realize rapid and multiple-cycle fluorination, improve a product yield, and have simple separation and purification of the product; and 3, the method has the advantages of cheap raw materials, convenient sources and simple operation, and is suitable for industrialized production.