Inventor
OFORI JOHN YAW
US31 patents
Patents
31 patentsUS5981788ANov 9, 1999
Method for recovering and recycling catalyst constituents
GEN ELECTRIC29 citations92
US6245929B1Jun 12, 2001
Catalyst composition and method for producing diaryl carbonates, using bisphosphines
GEN ELECTRIC24 citations91
US6197991B1Mar 6, 2001
Method and catalyst system for producing
GEN ELECTRIC28 citations91
US6380417B1Apr 30, 2002
Catalysts system for producing aromatic carbonates
GEN ELECTRIC8 citations74
US6215015B1Apr 10, 2001
Catalyst composition and method for producing diaryl carbonates, using bisphosphines
GEN ELECTRIC5 citations74
US6191060B1Feb 20, 2001
Reclamation of metal catalysts used in the production of diaryl carbonates
GEN ELECTRIC7 citations74
US6143914ANov 7, 2000
Method and catalyst system for producing aromatic carbonates
GEN ELECTRIC7 citations74
US6815565B2Nov 9, 2004
Method for preparing hydroquinones and dihydroxybiphenyl compounds from mixtures of bromophenols and benzoquinones
GEN ELECTRIC8 citations72
US6310232B1Oct 30, 2001
Method for recycle of bromide-containing catalyst constituents
GEN ELECTRIC7 citations71
US6143937ANov 7, 2000
Recovery of hydroxyaromatic compound from aqueous extract solutions
GEN ELECTRIC2 citations63
US6090737AJul 18, 2000
Removal of lead from organic diaryl carbonate reaction mixtures
GEN ELECTRIC5 citations63
US6160154ADec 12, 2000
Method and catalyst system for producing aromatic carbonates
GEN ELECTRIC3 citations62
US6521777B2Feb 18, 2003
Process for the production of diaryl carbonates
GEN ELECTRIC2 citations61
US6472551B2Oct 29, 2002
Process for the production of diaryl carbonates
GEN ELECTRIC2 citations61
US6420587B2Jul 16, 2002
Catalyst system for producing aromatic carbonates
GEN ELECTRIC3 citations61
US6420589B1Jul 16, 2002
Process for the production of diaryl carbonates
GEN ELECTRIC3 citations61
US6410774B1Jun 25, 2002
Method for recovery of catalyst components
GEN ELECTRIC5 citations61
US6384262B1May 7, 2002
Process for the production of diaryl carbonates
GEN ELECTRIC5 citations61
US6683015B2Jan 27, 2004
Method for reactivating a catalyst composition
GEN ELECTRIC6 citations59
US6441215B1Aug 27, 2002
Method for reducing carbonate decomposition in reaction mixtures
GEN ELECTRIC4 citations59
US7002046B2Feb 21, 2006
Process for the recovery of dihydroxybiaryl compounds
GEN ELECTRIC0 citations52
US6617279B2Sep 9, 2003
Catalyst composition and method for producing diaryl carbonates, using bisphosphines
GEN ELECTRIC0 citations52
US7053251B2May 30, 2006
Bromination of hydroxyaromatic compounds
GEN ELECTRIC1 citations51
US7045666B2May 16, 2006
Bromination of hydroxyaromatic compounds and further conversion to dihydroxyaromatic compounds
GEN ELECTRIC0 citations51
US6982356B2Jan 3, 2006
Method for preparation of para-brominated hydroxyaromatic compounds
GEN ELECTRIC1 citations51
US6506924B2Jan 14, 2003
Method for recovery of catalyst components
GEN ELECTRIC0 citations51
US6407027B2Jun 18, 2002
Catalyst composition and method for producing diaryl carbonates, using bisphosphines
GEN ELECTRIC0 citations50
US6310229B1Oct 30, 2001
Lead halophenoxides and carbonylation catalyst and method for preparing and employing them
GEN ELECTRIC1 citations50
US7351848B2Apr 1, 2008
Method and apparatus for preparing a dialkyl carbonate, and its use in the preparation of diaryl carbonates and polycarbonates
GEN ELECTRIC0 citations49
US7345187B2Mar 18, 2008
Method and apparatus for preparing a dialkyl carbonate, and its use in the preparation of diaryl carbonates and polycarbonates
GEN ELECTRIC0 citations49
US6800779B2Oct 5, 2004
Method for producing aromatic carbonates
GEN ELECTRIC0 citations42