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公开(公告)号：US20180345252A1
公开(公告)日：2018-12-06
申请号：US15883766
申请日：2018-01-30
Applicant: Rhodia Operations
Inventor： Franck Fajardie , Stephan Verdier
CPC classification number: B01J23/02 , B01D53/945 , B01D2255/206 , B01D2255/407 , B01D2255/9202 , B01J35/0013 , B01J37/0211 , B01J37/0232 , B01J37/036 , Y02T10/22
Abstract: Catalyst/catalyst support compositions are characterized by a supported cerium oxide, deposited onto a silica, alumina, titanium or zirconium based support, including particles of said supported oxide deposited onto said support, individualized or in the form of aggregates, no greater than 500 nm in size and having, after 6 hours of calcination at a temperature of at least 800° C., a measured reducibility from 30° C. and 900° C. of at least 80%; such compositions are prepared by combining a colloidal dispersion of the supported oxide and a suspension of the support, drying the resulting mixture by atomization and drying the resulting product by calcination.
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公开(公告)号：US09605203B2
公开(公告)日：2017-03-28
申请号：US15021994
申请日：2014-09-11
Applicant: RHODIA OPERATIONS
Inventor： Christelle Chretien , Lars Fischer , Stephan Verdier , Jacques Cavezzan
IPC: C07C39/08 , C08F36/00 , C09K15/08 , C08F236/08 , C08F136/08 , C07C37/68 , C08F2/38 , C07C37/14 , C07C37/82 , C07C37/74
CPC classification number: C09K15/08 , C07C37/14 , C07C37/68 , C07C37/74 , C07C37/82 , C07C39/08 , C08F2/38 , C08F136/08 , C08F236/08 , C08F2/40
Abstract: The invention describes a composition that inhibits the polymerization of ethylenically unsaturated monomers, including at least 98% by weight of 4-tert-butylcatechol (4-TBC), 0.03% to 0.2% by weight of catechol (PC), and at least one impurity selected among 3-tert-butylcatechol, tert-butylhydroquinone, 3,5-di-tert-butylcatechol and mixture thereof, the total quantity of said impurities and of the PC being 0.1% to 0.8% by weight of said composition. The invention also describes a method for removing said polymerization-inhibiting composition present in a mixture including at least one ethylenically unsaturated monomer.
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公开(公告)号：US11484052B2
公开(公告)日：2022-11-01
申请号：US16634823
申请日：2018-07-26
Applicant: RHODIA OPERATIONS
Inventor： Stephan Verdier , Frédéric Madelaine
Abstract: The present invention relates to a new bio-sourced vanillin and/or ethylvanillin, containing specific impurities. The invention further relates to a process for their preparations and the use of such compounds.
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公开(公告)号：US10882025B2
公开(公告)日：2021-01-05
申请号：US15883766
申请日：2018-01-30
Applicant: Rhodia Operations
Inventor： Franck Fajardie , Stephan Verdier
IPC: B01J23/02 , B01D53/94 , B01J35/00 , B01J37/02 , B01J37/03 , B01J37/00 , B01J21/08 , B01J35/02 , B01J21/16 , B01J21/06 , B01J23/00 , B01J37/08 , B01J21/02 , B01J37/04 , B01J23/30
Abstract: Catalyst/catalyst support compositions are characterized by a supported cerium oxide, deposited onto a silica, alumina, titanium or zirconium based support, including particles of said supported oxide deposited onto said support, individualized or in the form of aggregates, no greater than 500 nm in size and having, after 6 hours of calcination at a temperature of at least 800° C., a measured reducibility from 30° C. and 900° C. of at least 80%; such compositions are prepared by combining a colloidal dispersion of the supported oxide and a suspension of the support, drying the resulting mixture by atomization and drying the resulting product by calcination.
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