CAS: 6742-69-4; Ytterbium(Iii) Isopropoxide

专利信息

专利号:US-7829654-B2
优先权日:2004-05-11
标 题 :Method for producing elastomeric copolyesters
发明人：KAEMPF RUDOLF
权利人:LURGI ZIMMER GMBH
摘要:A process for continuous or discontinuous synthesis of elastomeric copolyesters from polybutylene terephthalate (PBT) and polyoxytetramethylene glycol is described in which the tetrahydrofuran (THF) obtained as a byproduct in synthesis of polybutylene terephthalate from 1,4-butanediol is rectified and then reacted by ring-opening polymerization to form polyoxytetramethylene glycol which condenses with the free or esterified carboxyl groups of PBT to form the copolyester, whereby chain termination and catalyst deactivation are accomplished by adding 1,4-butanediol without separating the catalyst.

专利号:WO-2007104359-A1
优先权日:2006-03-14
标 题:Synthesis of amines with ytterbium lewis acids
发明人：NUGENT THOMAS CHRISTOPHER; WAKCHAURE VIJAY NARAYAN
权利人:UNIV JACOBS BREMEN GMBH; NUGENT THOMAS CHRISTOPHER; WAKCHAURE VIJAY NARAYAN
摘要:The invention relates to methods for producing primary, secondary, and tertiary amines and the corresponding enantiopure or enantioenriched primary or secondary amine products from secondary or tertiary amine diastereomers.

专利号:CN-118479533-A
优先权日:2024-04-15
标 题 :Synthesis method of ammonia-resistant proton conductor material of direct ammonia fuel cell

专利号:CN-114773224-A
优先权日:2022-04-29
标 题:A kind of method of amide dehydration synthesis nitrile compound

专利号:FR-2865671-A1
优先权日:2004-01-30
标 题 :CERAMIC NANOPOUDRE SUITABLE FOR SINTING AND METHOD OF SYNTHESIS