CAS: 1314-13-2; Zinc Oxide

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-2009326281-A1
优先权日:2008-06-30
标题:Catalytic system and process for direct synthesis of dimethyl ether from synthesis gas
发明人：APPEL LUCIA GORENSTIN; DE FARIAS ANDREA MARIA DUARTE; ESTEVES ANGELA MARIA LAVOGADE; FRAGA MARCO ANDRE; RAMOS BARBOSA FLAVIA DE SOUZA; BORGES LUIZ EDUARDO PIZZARO; MONTEIRO JOSE LUIZ FONTES; HUERTAS FLORES JHONNY OSWALDO; DA SILVA MARIA ISABEL PAIS; SOUSA AGUIAR EDUARDO FALABELLA
权利人:PETROLEO BRASILEIRO SA; INT INST NAC DE TECNOLOGIA
摘要:A mixed-bed catalytic system and its activation for direct synthesis of dimethyl ether from synthesis gas are described, comprising a catalyst for methanol synthesis and the zeolite ferrierite in its acid form as the methanol dehydrating component, the two being mixed physically in the form of powder of defined granulometry or as pellets. Another object of the present invention is a process for production of the acid form of the zeolite ferrierite. Another object of the present invention is a process for direct synthesis of dimethyl ether from a synthesis gas, using the catalytic system of the present invention.

专利号:US-2015105479-A1
优先权日:2012-04-24
标 题:Catalytically active body for the synthesis of dimethyl ether from synthesis gas
发明人：SCHÄFER ALEXANDER; FEYEN MATHIAS; PARVULESCU ANDREI-NICOLAE; Müller Ulrich; SCHAACK BERND BASTIAN
权利人:BASF SE
摘要:The invention relates to a catalytically active body for the synthesis of dimethyl ether from synthesis gas. In particular, the invention relates to an improved catalytically active body for the synthesis of dimethyl ether, whereby the components of the active body comprise a methanol active component and an acid component comprising a zeolitic material being crystallized by means of one or more alkenyltrialkylammonium cation R 1 R 2 R 3 R 4 N + -containing compounds as structure directing agent. Furthermore, the present invention concerns a method for the preparation of a catalytically active body, the use of the catalytically active body and a method for the preparation of dimethyl ether from synthesis gas.

专利号:US-9393555-B2
优先权日:2012-02-15
标题:Catalytically active body for the synthesis of dimethyl ether from synthesis gas
发明人：SCHÄFER ALEXANDER; VON FEHREN THORSTEN; MADON ROSTAM
权利人:BASF SE
摘要:The invention relates to a catalytically active body for the synthesis of dimethyl ether from synthesis gas. In particular, the invention relates to an improved catalytically active body for the synthesis of dimethyl ether, whereby the components of the active body comprise a defined particle size distribution. Furthermore, the present invention concerns a method for the preparation of a catalytically active body, the use of the catalytically active body and a method for preparation of dimethyl ether from synthesis gas.

专利号:US-9610568-B2
优先权日:2012-02-15
标题 :Catalytically active body for the synthesis of dimethyl ether from synthesis gas
发明人：SCHÄFER ALEXANDER; VON FEHREN THORSTEN; MADON ROSTAM
权利人:BASF SE
摘要:The invention relates to a catalytically active body for the synthesis of dimethyl ether from synthesis gas. In particular, the invention relates to an improved catalytically active body for the synthesis of dimethyl ether, whereby the components of the active body comprise a defined particle size distribution. Furthermore, the present invention concerns a method for the preparation of a catalytically active body, the use of the catalytically active body and a method for preparation of dimethyl ether from synthesis gas.

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.