CAS: 4457-71-0; 3-Methylpentane-1,5-Diol

相似化合物

27151-65-1 626-51-7 19013-37-7

上下游产品

3,4-dihydro-2-methoxy-4-methyl-2H-pyran H-pyran6-methoxy-4-methyl-3,6-dihydro-2H-pyran diethyl 3-methylglutarate 3-methylpentanedial tetrahydro-4-methyl-2H-thiopyran 4-methyl-tetrahydro-pyran-2-one 3-methyl-1,5-dibromopentane 1,5-bis-benzoyloxy-3-methyl-pentane

4-甲基-5,6-二氢吡喃-2-酮置于5 Wt% Ruthenium/carbon,氢气体系中,用 水 作为反应溶剂,100.0 °C,14.0 Mpa 条件下,反应 6.3H,反应生成 3-甲基-1,5-戊二醇
参考文献:来自可再生羧酸的连续氢化的支链二元醇单体
标题:来自可再生羧酸的连续氢化的支链二元醇单体
摘要:用生物衍生的替代品替代石油化学聚合物的一项重大挑战是将生物质有效转化为有用的单体.在这项工作中,我们展示了一种在水性介质中使用多相催化剂从五碳六酸合成多功能醇的实用方法.该工艺的设计以热力学计算为指导,这表明需要进行两个顺序的高压加氢:一个是在高温下将酸还原为内酯;另一个是在高温下将酸还原为内酯.第二,在低温下将内酯进一步还原成相应的二醇或三醇.例如,以1.2分钟-1的周转频率,中康酸向(α或β)-甲基-γ-丁内酯的转化率达到95%在240oc下超过pd / C.随后在100oc下用ru / C将(α或β)-甲基-γ-丁内酯随后转化为2-甲基-1,4-丁二醇,产率为80%.该方法是生产内酯,二醇和三醇的有效方法,内酯,二醇和三醇是用于合成生物衍生的支链聚酯的所有有价值的单体.
DOI:10.1002/cctc.201600710

专利信息

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-11780952-B2
优先权日:2016-08-08
标题:Process for the synthesis of silylated polyurethanes and silylated polyurethane composition
发明人：LAFERTE OLIVIER
权利人:BOSTIK SA
摘要:The present invention provides a process for the synthesis of silylated polyurethanes, comprising three sequential steps, a step (i) of preparing NCO-terminated polyurethane, a step (ii) of partial grafting of the NCO functions with silane functions and a step (iii) of total grafting of the residual NCO functions with functions that react with the NCO functions by means of polyfunctional compounds. The present invention also provides a silylated polyurethane composition that can be obtained by means of the process according to the invention, an adhesive composition comprising said silylated polyurethane composition and a self-adhesive item obtained from the adhesive composition according to the invention.

专利号:US-2024352216-A1
优先权日:2021-08-20
标 题:Pyrolysis of a polymeric polyurethane compound in order to recover raw materials
发明人：EIDEN STEFANIE; BELLINGHAUSEN RAINER; WOLF AUREL; ALBACH ROLF
权利人:COVESTRO DEUTSCHLAND AG
摘要:The invention relates to a method according to claim 1 for the commercial implementation of a pyrolysis, and to pyrolysis devices for the pyrolysis of pyrolysis stock used in this method. The pyrolysis stock contains a polymeric compound having at least one structural polyurethane unit of the formula (I), wherein Q is a hydrocarbon group with 2 to 8 carbon atoms, preferably 3 to 8 carbon atoms, and n represents a number from 2 to 4, most preferably 2, and -* represents a covalent bond to the polymer backbone. The method and the pyrolysis device according to the invention allow, even with higher compounds of pyrolysis stock an amount of pyrolysis product to be obtained that contains cleavage products which can be reused for the synthesis of polyurethane-containing material.

专利号:US-2006115536-A1
优先权日:2004-11-12
标 题 :Glycerin based synthesis of silver nanoparticles and nanowires
发明人：YACAMAN MIGUEL J; ELECHIGUERRA JOSE L; BURT JUSTIN L; MORONES JOSE R; LOPEZ LETICIA L
权利人:UNIV TEXAS
摘要:The present invention includes compositions and methods for the production of noble metal nanoparticles and nanowires conjugated to polyols or polymers. The present invention allows the incorporation of noble metal nanoparticles to a wide range of products such as body care products to exploit the biocidal properties of silver nanoparticles against bacteria, viruses and fungi.

专利号:US-11059772-B2
优先权日:2017-11-30
标题:Imine-type quaternary ammonium salt catalyst, preparation method thereof and use thereof for preparation of polyisocyanate composition
发明人：WANG NUANCHENG; SHANG YONGHUA; WANG YUQI; SHI BIN; ZHU ZHICHENG; LI HEFU; LI YUAN; HUA WEIQI
权利人:WANHUA CHEMICAL GROUP CO LTD
摘要:Disclosed is an imine-type quaternary ammonium salt catalyst, wherein the catalyst has a general structure formula shown by formula I below; in the formula, R1 and R2, respectively, are independently selected from a C1-C20 linear alkyl or a branched C3-C20 alkyl, and a C1-C20 hydroxylalkyl, a C3-C8 cycloalkyl, and arylated alkyl; R3 is a linear or branched alkyl, cycloalkyl or aryl; and R4 is hydrogen, aryl, a linear C1-C15 alkyl or branched C3-C15 alkyl. Also disclosed are a method for preparing the catalyst and a polyisocyanate composition prepared therefrom. The catalyst, by introducing an imine structure, on the basis of ensuring high catalytic activity thereof, is allowed to have properties of high temperature decomposition and inactivation, and when applied to the synthesis of polyisocyanate, can effectively prevent the risk of explosive polymerization caused by an uncontrolled reaction.

专利号:US-3829522-A
优先权日:1971-10-21
标题:Synthesis of alkynes by dehydrohalogenation
发明人：SCHNEIDER C
权利人:SHERWIN WILLIAMS CO
摘要:MIXTURE AS A CONDENSED LIQUID. THE ALKYNE PRODUCTS ARE OBTAINED IN HIGH YEILD. A PROCESS FOR PREPARING ALKYNES OF HIGH PURITY BY DEHYDROGENATION. HALOGENATED PRECURSORS CONSISTING OF DIHALOALKANES AND MONOHALOALKENES ARE REACTED WITH PARTIAL ALCOHOLATE OF AN ALKALI METAL AND AN ALIPHATIC POLYOL. THE REACTION MIXTURE REMAINS FLUID DURING THE PROCESS. ALKYNES AND VOLATILE BY-PRODUCTS ARE EVAPORATED FROM THE REACTION MIXTURE AND PARTIALLY CONDENSED IN A SEPARATION TO RECOVER THE HIGH-PURITY ALKYNE PRODUCT. THE VOLATILE BY-PRODUCTS ARE RETURNED TO THE REACTION