CAS: 3486-35-9; Zinc Carbonate

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-4279781-A
优先权日:1979-10-09
标 题:Catalyst for the synthesis of methanol
发明人：DIENES EDWARD K; COLEMAN RAY L; HAUSBERGER ARTHUR L
权利人:UNITED CATALYSTS INC
摘要:A methanol synthesis catalyst which comprises a major portion by weight of the oxides of copper and zinc and a minor portion by weight of a thermal stabilizing metal oxide is useful for the synthesis of methanol from the oxides of carbon and hydrogen at relatively low temperatures. The catalyst is characterized in that the ratio of copper oxide to zinc oxide, each expressed as a metal by weight, is in the range of from 2:1 to 3.5:1 and by the intimate association with each other of copper and zinc oxides and with said thermal stabilizing oxide. Further, the catalyst is characterized in that the amount of iron oxides, as an impurity, is less than 150 parts per million.

专利号:US-4806516-A
优先权日:1986-07-24
标题 :Process for producing fluidized catalyst for synthesis of methanol
发明人：OSUGI MINORU; NAKAMURA TADASI; OBATA YORIKO
权利人:MITSUBISHI GAS CHEMICAL CO
摘要:A process for producing a fluidized catalyst for synthesis of methanol, which comprises molding a composition comprising n (A) 10 to 55% by weight of a mixture composed of water-insoluble copper, zinc and zirconium compounds convertible respectively to copper, zinc and zirconium oxides under calcination conditions, said mixture optionally containing a boron compound, n (B) 45 to 90% by weight of water, and n (C) 0.01 to 1% by weight of ammonia into fine particles, and calcining the fine particles.

专利号:US-4107089-A
优先权日:1977-03-14
标 题 :Catalyst for the synthesis of methanol and method for preparing same
发明人：BONDAR PETR GRIGORIEVICH; GOROSHKO OLEG NIKOLAEVICH; SUSCHAYA LARISA EMMANUILOVNA; LAVROVA VALENTINA VASILIEVNA; LELEKA VALENTINA EMMANUILOVNA; ILKO EDUARD GRIGORIEVICH
权利人:BONDAR PETR GRIGORIEVICH; GOROSHKO OLEG NIKOLAEVICH; SUSCHAYA LARISA EMMANUILOVNA; LAVROVA VALENTINA VASILIEVNA; LELEKA VALENTINA EMMANUILOVNA; ILKO EDUARD GRIGORIEVICH
摘要:A catalyst for the synthesis of methanol which contains an oxide of one or more metals of Group VI, chromium subgroup, of the periodic system, copper oxide, zinc oxide and an oxide of one or more hardly reducible metals of Group II-III of the periodic system.

专利号:US-7153991-B2
优先权日:2000-12-01
标 题:Rochow-Müller direct synthesis using nanosized copper catalyst precursors
发明人：LEWIS KENRICK M; RITSCHER JAMES S
权利人:GEN ELECTRIC
摘要:A Direct Synthesis of making organohalosilanes with greater selectivity to the dialkyldihalosilane is disclosed herein. By using nanosized copper catalyst precursors, and preferably nanosized promoters as well, D/T values of greater than 10, and preferably greater than 15, are obtainable with silicon conversions in excess of 80 wt. %. Shorter induction times are realized using the nanosized copper catalysts in the Direct Synthesis. The nanosized copper catalyst precursors most preferably have an average particle size of less than 100 nanometers.

专利号:US-9067262-B1
优先权日:2010-03-17
标题 :Copper alloy particle synthesis
发明人：DEINZER JOSHUA M
权利人:DEINZER JOSHUA M; Energetic Materials LLC
摘要:The present invention provides a novel process for synthesis of a copper-alloy particle with improved grain boundary properties. The process comprises the steps of: forming a solution from an alcoholic agent and a branched dispersing agent; forming a reaction mixture with the solution and a copper precursor and optionally a nickel precursor; heating the reaction mixture; cooling the reaction mixture; adding an additional amount of copper precursor and at least one precursor selected from the group consisting of: nickel, zinc, and bismuth; heating the reaction mixture; and maintaining the reaction mixture for a time sufficient to reduce the reaction mixture to copper-alloy particles.