CAS: 557-05-1; Zinc Stearate

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660-60-6 557-04-0 1072-35-1

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专利信息

专利号:WO-2020253244-A1
优先权日:2019-06-20
标 题 :Process for catalytic synthesis of lactide
发明人：JIANG WEI; ZHANG YANKAI; SUN PING; LI AIMIN; ZHANG QUANXING
权利人:NANJING UNIVERSITY OF TECHNOLOGY; NANJING QUANKAI RES INSTITUTE OF BIOMATERIALS CO LTD
摘要:The present invention provides a process for the catalytic synthesis of lactide, comprising: mixing a lactic acid oligomer with a composite catalyst; and synthesizing lactide under a heating condition, and collecting the product using a vacuum distillation mode. The used composite catalyst is composed of a zinc or tin compound and an alkali metal compound. Compared with the prior art, the advantages of the present invention are that: the used composite catalyst features a high production rate with a small use amount, a low reaction temperature (150-220°C), and a short reaction time (2-5 h), has a single pass yield that may reach 95% or more, reduces energy consumption compared with the prior art, and facilitates industrial implementations.

专利号:US-9950988-B2
优先权日:2012-12-26
标题:Method for the synthesis of alpha/alpha-prime-alcoxylated glycerol linear carbonic esters
发明人：LEISING FRéDéRIC; MOULOUNGUI ZéPHIRIN
权利人:CHRYSO; INST NAT POLYTECHNIQUE TOULOUSE; INST NAT DE LA RECH AGRONOMIQUE INRA
摘要:A method for the synthesis of α/α′-alcoxylated glycerol linear carbonic esters, wherein the following are brought into contact at a reaction temperature lower than 220° C.: a quantity of at least one precursor selected from the group consisting of α/α′-alcoxylated glycerol cyclo-carbonates; a quantity of at least one catalyst selected from the group consisting of metal oxides, Lewis acids, organometallic catalysts and mineral bases; and a quantity of at least one organic primer. A composition containing at least one novel α/α′-alkoxylated glycerol linear carbonic ester.

专利号:US-11926608-B2
优先权日:2021-03-04
标题:Synthesis method and device for rapidly producing lactide at high yield
发明人：JIANG WEI; QI YUNBIAO; SUN PING; HUANG WEI; LI AIMIN; ZHANG QUANXING
权利人:NANJING UNIVERSITY OF TECHNOLOGY; NANJING QUANKAI RES INSTITUTE OF BIOMATERIALS CO LTD
摘要:The invention discloses a synthesis method and device for rapidly producing lactide at high yield. The method comprises: adding a single component of lactic acid or two components of lactic acid and catalyst, passing the mixture through a mixer to enter an oligomer preparation system, increasing a residence time through bottom circulation, synthesizing oligomeric lactic acid, and passing a gas-phase component through a rectification system. With the adoption of the device, the lactide is capable of being efficiently synthesized, crude lactide with a yield of 94% to 98% is capable of being obtained.

专利号:US-4683332-A
优先权日:1985-05-20
标 题 :Para-nitrodiphenylamine synthesis
发明人：STURM BUDD H
权利人:GOODYEAR TIRE & RUBBER
摘要:There is disclosed a process for the synthesis of para-nitrodiphenylamines via the Formanilide Process wherein the improvement is characterized in that a specific catalyst is utilized. More specifically, a zinc (II) compound (zinc in the plus two oxidation or valence state), is used as a catalyst in the preparation of para-nitrodiphenylamines via the formanilide process.

专利号:US-4435599-A
优先权日:1982-11-26
标 题 :Para-nitrodiphenylamine synthesis
发明人：STURM BUDD H
权利人:GOODYEAR TIRE & RUBBER
摘要:There is disclosed a process for the synthesis of para-nitrodiphenylamines wherein the improvement is characterized in that a specific co-catalyst system is utilized. More specifically, a zinc (II) compound (zinc in the plus two oxidation or valence state), is used in conjunction with copper or a copper compound as a co-catalyst system in the preparation of para-nitrodiphenylamines.

专利号:US-6133473-A
优先权日:1998-06-25
标 题 :Synthesis of carbamate compounds
发明人：BERRIER JOHN VINCENT
权利人:ROHM & HAAS
摘要:Disclosed is a method for the preparation of carbamate compounds substantially free of by-products; the carbamate compounds being prepared by reacting an isocyanate with a hydroxylated compound in the presence of certain catalysts that increase the rate of carbamylation while decreasing the rate of by-product formation.