会员体验
专利管家(专利管理)
工作空间(专利管理)
风险监控(情报监控)
数据分析(专利分析)
侵权分析(诉讼无效)
联系我们
交流群
官方交流:
QQ群: 891211   
微信请扫码    >>>
现在联系顾问~
热词
    • 7. 发明授权
    • Preparation of 4-methylpyrimidines
    • 4-甲基嘧啶的制备
    • US5414086A
    • 1995-05-09
    • US199452
    • 1994-02-22
    • Stefan RittingerNorbert Rieber
    • Stefan RittingerNorbert Rieber
    • C07D239/26C07D239/42C07D295/104C07D239/34C07D239/38
    • C07D239/26C07D239/42C07D295/104Y02P20/582
    • A process for the preparation of a 4-methylpyrimidine of the general formula I ##STR1## in which R.sup.1 denotes C.sub.1 -C.sub.20 alkyl, C.sub.3 -C.sub.8 cycloalkyl, aryl, C.sub.7 -C.sub.12 phenalkyl, C.sub.7 -C.sub.12 alkylphenyl, NH.sub.2, NHCN, OH, and SH,in which a 1-aminovinyl methyl ketone of the general formula II ##STR2## in which R.sup.2 and R.sup.3 denote C.sub.1 -C.sub.20 alkyl, C.sub.3 -C.sub.8 cycloalkyl, aryl, C.sub.7 -C.sub.12 phenylalkyl, C.sub.7 -C.sub.12 alkylphenyl, C.sub.1 -C.sub.20 hydroxyalkyl or together denote a C.sub.2 -C.sub.7 alkylene chain optionally mono- to tetra-substituted by C.sub.1 -C.sub.4 alkyl and optionally interrupted by oxygen, nitrogen, or sulfur, is caused to react with a carboxamide or amidine or a salt thereof of the general formula III ##STR3## in which R.sup.1 has the aforementioned meanings and x stands for oxygen or NH, at temperatures ranging from 20.degree. to 200.degree. C. and pressures ranging from 0.01 to 50 bar.
    • 制备通式I(I)的4-甲基嘧啶的方法,其中R1表示C1-C20烷基,C3-C8环烷基,芳基,C7-C12苯烷基,C7-C12烷基苯基,NH2,NHCN ,OH和SH,其中通式II的1-氨基乙烯基甲基酮(II)其中R2和R3表示C1-C20烷基,C3-C8环烷基,芳基,C7-C12苯基烷基,C7-C12 烷基苯基,C 1 -C 20羟基烷基或一起表示任选被C 1 -C 4烷基单取代和四取代并任选被氧,氮或硫中断的C 2 -C 7亚烷基链与羧酰胺或脒或盐反应 其中R 1具有上述含义,x代表氧或NH,通常在20℃至200℃的温度和0.01至50巴的压力下进行。
    • 10. 发明申请
    • Process for Preparing Polymethylols
    • 制备多羟基睾酮的方法
    • US20110272270A1
    • 2011-11-10
    • US13144124
    • 2010-01-07
    • Stephan SchlitterMichael SteinigerStefan RittingerTilman SirchSteffen Maas
    • Stephan SchlitterMichael SteinigerStefan RittingerTilman SirchSteffen Maas
    • B01D3/36
    • C07C29/80C07C29/141C07C45/75C07C45/82C07C31/22C07C31/245C07C47/19
    • The present invention relates to a process for recovering components from a low boiler mixture which is obtained in the distillation of hydrogenation effluents from the preparation of polymethylols, by multistage distillation of the low boiler mixture comprising a tertiary amine, water, methanol, polymethylol of the formula (I) methylolalkanal of the formula (II) alcohol of the formula (III) and an alkanal with a methylene group in the α position to the carbonyl group, and in which each R is independently a further methylol group or an alkyl group having 1 to 22 carbon atoms or an aryl or aralkyl group having 6 to 22 carbon atoms, a first distillation stage involving separating the low boiler mixture into a higher-boiling, predominantly water-rich fraction and into a lower-boiling aqueous organic fraction comprising the tertiary amine, and the second distillation stage involving separating the aqueous organic fraction from the first distillation stage into a predominantly amine-containing fraction and a further amine-depleted fraction, wherein the tertiary amine is trimethylamine or triethylamine, and the bottom temperature in the second distillation stage is 110° C. and more.
    • 本发明涉及一种从低沸点混合物中回收组分的方法,该方法是从多羟甲基的制备中蒸馏氢化流出物获得的,通过多级蒸馏包含叔胺,水,甲醇,多羟甲基的低沸点混合物 式(I)式(II)醇的式(I)的羟甲基烷醛和式(III)的醇的亚烷基与在羰基的α位上具有亚甲基的链烷醛,其中每个R独立地是另外的羟甲基或具有 1至22个碳原子或具有6至22个碳原子的芳基或芳烷基,第一蒸馏阶段包括将低锅炉混合物分离成较高沸点,主要是富水部分和低沸点含水有机部分, 叔胺,第二蒸馏阶段将含水有机部分从第一蒸馏阶段分离成主要是胺 其中叔胺为三甲胺或三乙胺,第二蒸馏阶段的底部温度为110℃以上。