Patent assignee · US · COMPANY

Celanese International Corporation

549Patents
454Active
549Granted
61Portfolio score

Filing activity: Apr 18, 1996 → Oct 30, 2023 · 79 expiring within 5 years

Most-cited patents

PatentTitleAreaCited byStatus
US6657078B2 Low energy carbonylation process Chemistry; Metallurgy 240 Expired
US6143930A Removal of permanganate reducing compounds and alkyl iodides from a carbonylation process stream Chemistry; Metallurgy 195 Expired
US7608744B1 Ethanol production from acetic acid utilizing a cobalt catalyst Emerging Cross-Sectional Technologies 191 Active
US7005541B2 Low water methanol carbonylation process for high acetic acid production and for water balance control Chemistry; Metallurgy 173 Expired
US7863489B2 Direct and selective production of ethanol from acetic acid utilizing a platinum/tin catalyst Performing Operations; Transporting 165 Active
US6627770B1 Method and apparatus for sequesting entrained and volatile catalyst species in a carbonylation process Chemistry; Metallurgy 162 Expired
US7208624B2 Process for producing acetic acid Chemistry; Metallurgy 152 Expired
US6368819B1 Microbial process for the preparation of acetic acid as well as solvent for its extraction from the fermentation broth Chemistry; Metallurgy 148 Expired
US6768021B2 Process improvement for continuous ethyl acetate production Chemistry; Metallurgy 136 Expired
US7115772B2 Integrated process for producing carbonylation acetic acid, acetic anhydride, or coproduction of each from a methyl acetate by-product stream Emerging Cross-Sectional Technologies 131 Expired
US6765110B2 Process for the simultaneous coproduction and purification of ethyl acetate and isopropyl acetate Chemistry; Metallurgy 104 Expired
US7223886B2 Removal of permanganate reducing compounds from methanol carbonylation process stream Chemistry; Metallurgy 74 Expired
US8071821B2 Direct and selective production of ethanol from acetic acid utilizing a platinum/ tin catalyst Performing Operations; Transporting 71 Active
US6852877B1 Process for the production of vinyl acetate Emerging Cross-Sectional Technologies 67 Expired
US6339171B1 Removal or reduction of permanganate reducing compounds and alkyl iodides from a carbonylation process stream Chemistry; Metallurgy 66 Expired
US8309772B2 Tunable catalyst gas phase hydrogenation of carboxylic acids Emerging Cross-Sectional Technologies 60 Active
US6599348B2 Methods for reducing entrainment of solids and liquids Performing Operations; Transporting 37 Expired
US7906680B2 Integrated process for producing carbonylation acetic acid, acetic anhydride, or coproduction of each from a methyl acetate by-product stream Emerging Cross-Sectional Technologies 36 Active
US6251256A Process for electrochemical oxidation of an aldehyde to an ester Chemistry; Metallurgy 36 Expired
US6753170B2 Microbial process for the preparation of acetic acid, as well as solvent for its extraction from the fermentation broth Chemistry; Metallurgy 35 Expired
US7820852B2 Direct and selective production of ethyl acetate from acetic acid utilizing a bimetal supported catalyst Chemistry; Metallurgy 35 Active
US7518014B2 Modified support materials for catalysts Chemistry; Metallurgy 34 Active
US7855306B2 Process for the production of acetic acid Chemistry; Metallurgy 32 Active
US6045332A Control system for multi-pump operation Emerging Cross-Sectional Technologies 29 Expired
US7196218B2 Microbial process for the preparation of acetic acid, as well as solvent for its extraction from the fermentation broth Chemistry; Metallurgy 28 Expired

Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.