DICHLOROMETHANE PURIFICATION METHOD AND PROCESS FOR PRODUCING DIFLUOROMETHANE USING THE SAME

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United States of America Patent

APP PUB NO 20160060193A1
SERIAL NO

14787339

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Abstract

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To provide a dichloromethane purification method which can reduce the amount of stabilizers present in dichloromethane and is feasible in industry by a simple operation, a dichloromethane purification method includes bringing dichloromethane containing at least one stabilizer selected from the group consisting of 2-methyl-2-butene, hydroquinone and resorcinol into contact in a liquid phase state with a zeolite having an average pore size of 3 to 11 Å and thereby reducing the amount of the stabilizer.

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Patent Owner(s)

Patent OwnerAddress
SHOWA DENKO K K13-9 SHIBADAIMON 1-CHOME MINATO-KU TOKYO 105-8518

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  • 2014 Application Filing Year
  • C07C Class
  • 3318 Applications Filed
  • 2843 Patents Issued To-Date
  • 85.69 % Issued To-Date
Click to zoom InYear of Issuance% of Matters IssuedCumulative IssuancesYearly Issuances201420152016201720182019202020212022202320240255075100

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
OHI, Toshio Tokyo, JP 45 207
OHNO, Hiromoto Tokyo, JP 48 215

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Citation count rangeNumber of patents cited in rangeNumber of patents cited in various citation count ranges8711227112381574101 - 1011 - 2021 - 3031 - 4041 - 5051 - 6061 - 7001002003004005006007008009001000110012001300

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