CAS: 301-10-0; Stannous Octoate

专利信息

专利号:WO-2020253243-A1
优先权日:2019-06-20
标题:Process method for catalyzed synthesis of lactide with alkali metal compound
发明人：JIANG WEI; ZHANG YANKAI; SUN PING; LI AIMIN; CHEN JINLONG; 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 method for catalyzed synthesis of lactide with an alkali metal compound, comprising: mixing an alkali metal compound with a lactic acid oligomer, and carrying out a cracking reaction to obtain lactide by means of vacuum distillation, wherein the alkali metal compound used is one or a plurality of an alkali metal carbonate, an alkali metal bicarbonate, and an alkali metal hydroxide. Compared with the prior art, the advantages of the present invention is that the alkali metal compound reacts and dissolves quickly after being added to the system avoiding the problem of pipeline blocking due to a catalyst not dissolving, the alkali metal compound used is cheap and readily available, the amount of the catalyst used is small, the yield of the reaction product lactide is greater than 80%, and the reaction is rapid and easy to industrialize.

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-11987567-B2
优先权日:2021-09-15
标题 :Synthesis method of lactide by confinement effect catalysis of crystalline porous polymer material
发明人：ZHAO YINGJIE; QIU WENQI; LIU HUI; ZHANG ZHENXIU; ZHAO JINYU
权利人:QINGDAO UNIV OF SCIENCE AND TECHNOLOGY
摘要:The present invention discloses a synthesis method of lactide by confinement effect catalysis of crystalline porous polymer material, wherein the method comprising: (I) synthesis of catalyst; (II) synthesis of lactide by confinement effect catalysis; and (III) purification of lactide. In the present invention, a yield of L-lactide by catalysis of L-lactic acid by crystalline polymers is as high as 85.6%, which is 10% higher than the yield of lactide by H-β molecular sieve reported in documents currently available; it is easy to prepare the crystalline porous polymer material catalyst, which is environmental friendly, has a high yield and is recyclable, for consecutive 7 times the catalysis yield is maintained to be higher than 70%, and catalysis yield conservation rate is far higher than catalysis effects of catalysts reported in documents currently available.

专利号:US-11725070-B2
优先权日:2018-05-09
标 题:Polymerization process for the synthesis of vinyl aromatic polymers with a controlled structure
发明人：GHELFI FRANCO; FERRANDO ANGELO; LONGO ALDO; BUFFAGNI MIRKO
权利人:VERSALIS SPA
摘要:The present invention relates to a polymerization process for the synthesis of vinyl aromatic polymers, in which the sequence of monomers in the chain and the linear, branched soluble, or crosslinked insoluble structure, with reactive or different polarity functions, are controlled. Said process comprises the step of polymerizing vinyl aromatic monomers by means of an Atom Transfer Radical Polymerization (ATRP) reaction with an Activator ReGenerated by Electron Transfer (ARGET), the reaction being carried out at a temperature comprised between 25° C. and 110° C. in an inert gas atmosphere in the presence of a complex catalyst containing a cupric halide and a multidentate amine ligand, feeding to the reaction an organic initiator having two geminal halogens, an alkali metal (bi)carbonate, a solvent pair of an aliphatic alcohol and an acetic ester of the same aliphatic alcohol and possibly ascorbic acid, provided that no initiator is used with three or more active halogens, or polyvinyl monomers or inimers.

专利号:US-2024368099-A1
优先权日:2022-01-18
标 题:Methods for the synthesis of di(hydroxymethyl)tetrahydrofuran and its application in polyesters and polyurethanes
发明人：SPIEGELBERG BRIAN; BRANDT ADRIAN; BECK HORST; KUX ALEXANDER; TIN SERGEY; DE VRIES JOHANNES GERARDUS
权利人:HENKEL AG & CO KGAA
摘要:The present invention relates to the synthesis of di(hydroxymethyl)tetrahydrofuran (DHMTHF) and the preparation of trans-enriched mixtures of DHMTHF. The invention further refers to polyester polyols which are obtained by reaction of cis/trans DHMTHF mixtures with a dicarboxylic acid. The invention further relates to polyurethanes and compositions containing a polyester polyol comprising DHMTHF, in particular to such polyurethane-containing (adhesive) compositions.

专利号:US-4476252-A
优先权日:1982-11-06
标题 :Process for the synthesis of polymers with laterally linked polyoxyalkylene chains and their use for the production of polyurethanes
发明人：ESSELBORN EBERHARD; FOCK JUERGEN
权利人:GOLDSCHMIDT AG TH
摘要:Process for the synthesis of polymers with laterally linked polyoxyalkylene chains by the free radical polymerization of polyoxyalkylene ethers with olefinic double bonds with other vinyl compounds, capable of copolymerizing wherein the polyoxyalkylene ethers of allyl and/or methallyl alcohol are copolymerized in a known manner with vinyl esters of lower carboxylic acids or mixtures of vinyl esters of lower carboxylic acids with up to 50 mole percent of esters of acrylic or methacrylic acid. The compounds can be used to advantage as reaction components having hydroxyl groups in the production of polyurethanes. In particular, they improve the mechanical properties of polyurethane foams, such as, for example, their compression hardness.