Purification Or Recovery Of 1,2,3,4,5,6 - Hexachlorocyclohexane (i.e., Benzene Hexachloride) Patents (Class 570/213)
  • Fluorinated block copolyesters
    Patent number: 8791212
    Abstract: Disclosed are block copolyesters comprising blocks of fluoroether functionalized aromatic polyester and blocks of unmodified aromatic polyester, the block copolyesters having a blockiness index, B, in the range of 0.25 to 1.0. The block copolymers incorporated into blends with unmodified aromatic polyester impart oil and soil resistance to shaped articles prepared from the blends.
    Type: Grant
    Filed: November 8, 2011
    Date of Patent: July 29, 2014
    Assignee: E I du Pont de Nemours and Company
    Inventors: Neville Everton Drysdale, Elizabeth Forrester McCord, Fredrik Nederberg
  • Process for the conversion of a halogenated organic stream containing trace quantities of organic nitrates
    Patent number: 5744669
    Abstract: A process for the conversion of a halogenated organic stream containing trace quantities of organic nitrates to produce a stream comprising hydrogenated hydrocarbonaceous compounds free from organic nitrates and halogenated organic compounds by means of contacting the feed stream and hydrogen with a selective hydrogenation catalyst in a first hydrogenation zone at hydrogenation conditions to convert the organic nitrates into water-soluble nitrogen compounds while effectively minimizing the production of hydrogen halide compounds. The resulting effluent from the first hydrogenation zone is contacted with an aqueous scrubbing solution to recover at least a portion of the water-soluble nitrogen compounds in order to produce a stream containing halogenated organic compounds and essentially free of nitrogen compounds which is then introduced into a second hydrogenation zone operated at selected hydrogenation conditions to produce water-soluble hydrogen halide compounds and hydrogenated hydrocarbonaceous compounds.
    Type: Grant
    Filed: January 30, 1997
    Date of Patent: April 28, 1998
    Assignee: UOP
    Inventors: Tom N. Kalnes, George R. Hibel, Chwu-Ching Jan
  • Process for the selective removal of organic nitrates from a halogenated organic stream containing trace quantities of organic nitrates
    Patent number: 5600041
    Abstract: A process for treating a stream containing halogenated organic compounds and having trace quantities of organic nitrates to produce a stream comprising halogenated organic compounds free from organic nitrates by the utilization of a hydrogenation zone operated at selective hydrogenation conditions in order to convert the organic nitrates to water-soluble nitrogen compounds while minimizing the production of hydrogen halide compounds. The resulting water-soluble nitrogen compounds are removed by extraction with an aqueous stream.
    Type: Grant
    Filed: February 13, 1995
    Date of Patent: February 4, 1997
    Assignee: UOP
    Inventors: Chwu-Ching Jan, Tom N. Kalnes, George R. Hibel
  • Recovery of hexabromocyclododecane particles
    Patent number: 5004847
    Abstract: Methods for purifying and agglomerating hexabromocyclododecane particles by heating an admixture formed with wetcake and water.
    Type: Grant
    Filed: December 27, 1989
    Date of Patent: April 2, 1991
    Assignee: Ethyl Corporation
    Inventors: Phillip R. Beaver, Peter M. DiGiacinto, Donald O. Hutchinson, Julio J. Vega