The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 16, 1996
Filed:
Jun. 07, 1994
William Q Beard, Jr, Wichita, KS (US);
Vulcan Materials Company, Wichita, KS (US);
Abstract
A process for the purification of 1,1,1-trichloroethane contaminated with at least one undesirable C.sub.1 -C.sub.3 chlorocarbon, for example, 1,2-dichloroethane, 1,2-dichloroethylene and/or trichloroethylene, which process comprises contacting the impure 1,1,1-trichloroethane with a particulate adsorbent, the adsorbent being a particulate product of controlled pyrolysis of a polysulfonated macroporous crosslinked vinylaromatic polymer having a surface area of at least about 500 m.sup.2 /g, a micropore pore volume of at least about 0.24 ml/g, a macropore pore volume of less than about 0.24 ml/g and a ratio of macropore to micropore pore volume of less than 100 percent is provided.