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Class Information
Number: 585/832
Name: Chemistry of hydrocarbon compounds > Purification, separation, or recovery > Polymerization and depolymerization
Description: Subject matter which includes a step of chemically condensing olefinic molecules in the hydrocarbon mixture followed, usually after filtration or gravitational separation, by depolymerization of the condensed material.

Patents under this class:

Patent Number Title Of Patent Date Issued
7388122 Dewaxing aid Jun. 17, 2008
7202391 Process for inhibiting polymerization of an aromatic vinyl compound Apr. 10, 2007
7166658 Rubber reduction Jan. 23, 2007
6960279 Method for stabilizing vinyl aromatic monomers using selected polymerization inhibitors and polymers prepared therewith Nov. 1, 2005
6660181 Inhibition of polymerization of unsaturated monomers Dec. 9, 2003
6518453 Method for stabilizing chemical compounds containing at least one ethylenically unsaturated bond in order to prevent undesirable radical polymerization Feb. 11, 2003
6504068 Method for converting a plastic waste into oil in a stainless steel reactor Jan. 7, 2003
6403850 Inhibition of polymerization of unsaturated monomers Jun. 11, 2002
6395942 Increasing the thermal stability of a vinyl aromatic polymerization inhibitor May. 28, 2002
6395943 Process for inhibiting the polymerization of vinyl aromatic compounds May. 28, 2002
6262172 Method for preparing a carbonized resin DNA immunoadsorbent Jul. 17, 2001
6200460 Substance mixtures containing stabilizers and compounds containing vinyl groups Mar. 13, 2001
6024894 Compositions and methods for inhibiting vinyl aromatic monomer polymerization Feb. 15, 2000
5998490 Nonaqueous ozonation of vulcanized rubber Dec. 7, 1999
5973217 Method for processing recycled or scrap plastics Oct. 26, 1999
5942649 Method for monomer recovery Aug. 24, 1999
5907071 Compositions and methods for inhibiting vinyl aromatic monomer polymerization May. 25, 1999
5877366 Dicyclopentadiene cracking process Mar. 2, 1999
5841011 Process for producing light-weight oil from waste plastics containing phthalic polyester and/or polyvinyl chloride Nov. 24, 1998
5744672 Method for inhibiting the polymerization of vinyl aromatics Apr. 28, 1998
5728917 Polymer depolymerization using ruthenium and osmium carbene complexes Mar. 17, 1998
5672794 Recovery of styrene from waste polystyrene Sep. 30, 1997
5582808 Borohydrides to inhibit polymer formation in petrochemical caustic scrubbers Dec. 10, 1996
5545782 Method for inhibiting premature polymerization of vinyl aromatic monomers Aug. 13, 1996
5545786 Method for inhibiting premature polymerization of vinyl aromatic monomers Aug. 13, 1996
5516952 Oxidative decoupling of scrap rubber May. 14, 1996
5443716 Process for converting oligomer-containing waste streams to fuels Aug. 22, 1995
5321177 Process for the vapor-phase thermal cracking of dicyclopentadiene and a process for the manufacture of high purity dicyclopentadiene Jun. 14, 1994
5292992 Process for removing conjugated dienes from alpha-olefins Mar. 8, 1994
4835335 Process for two-stage catalytic conversion of an olefins-containing feed May. 30, 1989
4795842 Methane conversion process Jan. 3, 1989
4645576 Process for isolating and recovering butene-1 of high purity Feb. 24, 1987
4522688 Process for recovery of cyclopentadienes Jun. 11, 1985
4520225 Process for the pretreatment of light olefin fractions May. 28, 1985
4513166 Process for the low polymerization of isobutene Apr. 23, 1985
4482775 Isomerization of C.sub.4 alkenes Nov. 13, 1984
4479023 Process for the oligomerization of light olefin fractions in the presence of a boron trifluoride catalyst Oct. 23, 1984
4471153 Process for the removal of cyclopentadiene from unsaturated C.sub.5 -hydrocarbons Sep. 11, 1984
4454367 Process for the low polymerization of isobutene Jun. 12, 1984
4450310 Conversion of methane to olefins and hydrogen May. 22, 1984
4375576 Enhanced diisobutene production in the presence of methyl tertiary butyl ether Mar. 1, 1983
4323698 Resin-metal compound complex for catalyzing chemical reactions Apr. 6, 1982
4313016 Isobutene removal from C4 streams Jan. 26, 1982
4242530 Process for separating isobutene from C.sub.4 streams Dec. 30, 1980
4225738 Production of high purity butadiene Sep. 30, 1980
4218569 Method for processing etherified light hydrocarbon mixtures to remove methanol Aug. 19, 1980
4117025 Process for purifying diolefin Sep. 26, 1978
4048242 Process for the production of cyclopentene from dicyclopentadiene Sep. 13, 1977

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