Abstract: A process for economically producing 1,1,1,3,3-pentachloropropane under conditions which preserve the activity of the catalyst. In a preferred embodiment, a two-stage distillation process is employed. In the two-stage process, the size of the equipment, temperature and vacuum are varied.
Type:
Grant
Filed:
April 17, 2002
Date of Patent:
April 13, 2004
Assignee:
Vulcan Chemicals Division of Vulcan Materials Company
Inventors:
Richard L. Wilson, John L. Dawkins, Rodney L. Klausmeyer, James J. Weller
Abstract: A composition useful as a blowing agent having no flash point or reduced combustibility comprising 2-chloropropane and a gas selected from the group consisting of a fluorohydrocarbon, perfluorocarbons, fluoroethers, hydrofluoropolyethers and mixtures thereof is disclosed. A polyisocyanurate foam or a polyurethane modified polyisocyanurate foam having a mainly closed cell structure and also a method for preparing this foam, the latter comprising closed cells wherein a foam blowing agent consisting of a mixture of 2-chloropropane and one or more HFC compounds including pentafluoropropane, pentafluorobutane, heptafluoropropane, hexafluoropropane or pentafluoroethane are disclosed. Pentanes can be added if desired. Azeotropic mixtures in which 2-chloropropane is an ingredient are disclosed.
Type:
Grant
Filed:
February 14, 2002
Date of Patent:
November 11, 2003
Assignee:
Vulcan Chemicals a division of Vulcan Materials
Company
Abstract: A process for economically producing 1,1,1,3,3-pentachloropropane under conditions which preserve the activity of the catalyst. In a preferred embodiment, a two-stage distillation process is employed. In the two-stage process, the size of the equipment, temperature and vacuum are varied.
Type:
Application
Filed:
April 17, 2002
Publication date:
October 23, 2003
Applicant:
VULCAN CHEMICALS DIVISION OF VULCAN MATERIALS COMPANY
Inventors:
Richard L. Wilson, John L. Dawkins, Rodney L. Klausmeyer, James J. Weller
Abstract: Preparing isopropyl chloride (2-chloropropane) employing propylene, hydrochloric acid and ferric chloride catalyst in an isopropyl chloride solution at effective temperatures and pressure to produce 2-chloropropane. The amount of ferric chloride catalyst is less than that conventionally employed and the temperature and pressure are greater than conventionally employed.
Type:
Grant
Filed:
August 19, 2002
Date of Patent:
September 9, 2003
Assignee:
Vulcan Chemicals division of Vulcan Materials Company
Inventors:
Rodney L. Klausmeyer, David E. Brummond
Abstract: A composition useful as a blowing agent having no flash point or reduced combustibility comprising 2-chloropropane and a gas selected from the group consisting of a fluorohydrocarbon, perfluorocarbons, fluoroethers, hydrofluoropolyethers and mixtures thereof is disclosed. A polyisocyanurate foam or a polyurethane modified polyisocyanurate foam having a mainly closed cell structure and also a method for preparing this foam, the latter comprising closed cells wherein a foam blowing agent consisting of a mixture of 2-chloropropane and one or more HFC compounds including pentafluoropropane, pentafluorobutane, heptafluoropropane, hexafluoropropane or pentafluoroethane are disclosed. Pentanes can be added if desired. Azeotropic mixtures in which 2-chloropropane is an ingredient are disclosed.
Type:
Application
Filed:
February 14, 2002
Publication date:
December 26, 2002
Applicant:
Vulcan Chemicals, Division of Vulcan Materials Company