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82785-14-6

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82785-14-6 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 82785-14-6 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,2,7,8 and 5 respectively; the second part has 2 digits, 1 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 82785-14:
(7*8)+(6*2)+(5*7)+(4*8)+(3*5)+(2*1)+(1*4)=156
156 % 10 = 6
So 82785-14-6 is a valid CAS Registry Number.

82785-14-6Relevant articles and documents

Preparation method of hexafluoro-1, 3-butadiene

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Paragraph 0029-0030; 0032-0033; 0035-0036, (2021/04/14)

The invention belongs to the technical field of organic synthesis, and particularly relates to a preparation method of hexafluoro-1, 3-butadiene. The method comprises the following steps: cracking R22 used as a raw material to prepare TFE, preparing TFE and Br2 according to a certain ratio under certain conditions to generate dibromotetrafluoroethane, and reacting dibromotetrafluoroethane with TFE at certain temperature under the conditions of zinc powder and a DMF-toluene combined solvent to prepare the hexafluoro-1, 3-butadiene. After the reaction, a gas phase sample is collected and analyzed by GC chromatography, and the proportion of hexafluoro-1, 3-butadiene accounts for more than 85%. The method has the advantages of simple and accessible raw materials, low price, simple and safe technical preparation process, high product yield and the like.

PROCESS FOR PRODUCING FLUORINE COMPOUND

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Paragraph 0019-0026, (2020/03/05)

PROBLEM TO BE SOLVED: To provide a production process that can continuously produce 1,1,1,4,4,5,5,5-octafluoro-2-pentene (HFO1438 mzz) without using pure TFE having explosion risk. SOLUTION: Said production process comprises: a first step of pyrolyzing chlorodifluoromethane to yield a TFE crude product containing tetrafluoroethylene (TFE) and hydrogen chloride; a second step of subjecting the TFE crude product to hydrogen chloride removal, or hydrogen chloride removal and drying, to yield a TFE crude product from which hydrogen chloride is removed; and a third step of producing, in the presence of catalyst, HFO1438 mzz from the hydrogen chloride-removed TFE crude product and 1-3,3,3-tetrafluoropropene. SELECTED DRAWING: Figure 1 COPYRIGHT: (C)2020,JPOandINPIT

Direct defluorinative amidation-hydrolysis reaction of gem-difluoroalkenes with N,N-dimethylformamide, and primary and secondary amines

Wang, Biyun,Zhao, Xianghu,Liu, Qingyun,Cao, Song

, p. 8546 - 8552 (2018/12/01)

A novel and efficient method for the synthesis of arylacetamides by the reactions of gem-difluoroalkenes with N,N-dialkylformamides, and primary and secondary amines with the assistance of KOtBu and water was developed.

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