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    • 1. 发明申请
    • PROCESS FOR SPLITTING WATER-SOLUBLE ETHERS
    • 分离水溶性物质的方法
    • US20030187308A1
    • 2003-10-02
    • US10136083
    • 2002-04-29
    • Thomas HaasChristian RongeTorsten Hahm
    • C07C029/141
    • C07C29/10C07C29/141C07C2601/14C12C11/02C07C31/202C07C35/14C07C33/03C07C31/08C07C31/10C07C31/20C07C31/04C07C31/22C07C31/205
    • A process for production of 1,3-propanediol including the steps: (a) hydrating acrolein in the presence of an acid hydration catalyst; (b) catalytically hydrogenating the reaction mixture of step (a), which reaction mixture comprises 3-hydroxypropionaldehyde and is freed of unreacted acrolein; (c) refining the reaction mixture of step (b) containing water, 1,3-propanediol and the by-products boiling higher than 1,3-propanediol; and (d) treating 4-oxa-1,7-heptanediol to form 1,3-propanediol by (1) removing a boiler sump comprising 4-oxa-1,7-heptanediol from the refining step (c), (2) treating the boiler sump in an aqueous solution in the presence of an acid catalyst at about 200 to about 300null C. to form a solution comprising 1,3-propanediol, (3) neutralizing the solution obtained is step (2), and returning the neutralized solution from step (3) to the refining step (c). In addition, a process for splitting oligomeric water-soluble ether comprising: (a) treating an aqueous solution comprising oligomeric water-soluble ether in the presence of homogeneous acid catalyst at a temperature of from about 200 to about 300 null C. to form the monomer of the oligomeric water-soluble ether; and (b) neutralizing the solution obtained in step (a),
    • 一种制备1,3-丙二醇的方法,包括以下步骤:(a)在酸性水合催化剂存在下水合丙烯醛; (b)催化氢化步骤(a)的反应混合物,该反应混合物包含3-羟基丙醛,并且不含未反应的丙烯醛; (c)精制含有水,1,3-丙二醇和沸点高于1,3-丙二醇的副产物的步骤(b)的反应混合物; (d)通过(1)从精制步骤(c),(2)中除去包含4-氧杂-1,7-庚二醇的锅炉贮槽,处理4-氧杂-1,7-庚二醇以形成1,3-丙二醇, 在约200〜约300℃的酸催化剂存在下,在水溶液中处理锅炉池,形成含有1,3-丙二醇的溶液,(3)中和所得溶液为步骤(2),并返回 从步骤(3)到精制步骤(c)的中和溶液。 另外,一种分解低聚水溶性醚的方法,包括:(a)在均聚酸催化剂存在下,在约200至约300℃的温度下处理包含低聚水溶性醚的水溶液,以形成 低聚水溶性醚的单体; 和(b)中和步骤(a)中获得的溶液,
    • 3. 发明申请
    • Method for producing trimethylol alkanes
    • 三羟甲基烷烃的制备方法
    • US20030009062A1
    • 2003-01-09
    • US10181011
    • 2002-07-12
    • Frank DobertAlexander KlausenerPaul Wagner
    • C07C029/141C07C053/06
    • C07C29/14C07C45/75C07C31/22C07C47/19
    • 1 The invention relates to a two-step method for producing trimethylol alkanes of the general formula (I), (HOCH2)3nullCnullR, wherein R represents methylol C1-C12 alkyl, C6-C10 aryl or C1-C22 aralkyl, and simultaneously producing calcium formiate on the basis of an aldehyde of the formula (II), RCH2CHO, wherein R has the meaning indicated above. In a first step, an aldehyde of the formula (II) and a formaldehyde are reacted in the presence of a base to give a 2,2-dimethylol alkanal of formula (III), wherein R has the meaning indicated above. In a second step, the compound of formula (III) is reacted with formaldehyde in the presence of calcium hydroxide. The invention provides a method for obtaining trimethylol alkanes of the general formula (I) with a high purity and in high yields.
    • 本发明涉及用于制备通式(I),(HOCH 2)3-CR的三羟甲基烷烃的两步法,其中R表示羟甲基C1-C12烷基,C6-C10芳基或C1-C22芳烷基,同时产生 基于式(II)的醛,RCH 2 CHO,其中R具有上述含义。 在第一步中,式(II)的醛和甲醛在碱的存在下反应,得到式(III)的2,2-二羟甲基亚烷基,其中R具有上述含义。 在第二步中,式(III)化合物在氢氧化钙存在下与甲醛反应。 本发明提供了一种以高纯度和高产率获得通式(I)的三羟甲基烷烃的方法
    • 8. 发明申请
    • High-purity 1,3-butylen glycol, process for producing 1,3-butylene glycol, and process for producing by -product butanol and butyl acetate
    • US20030018224A1
    • 2003-01-23
    • US09958129
    • 2002-01-02
    • Yasuo TsujiHiroaki UenakaiHiroshi Koyama
    • C07C029/141
    • C07C31/20C07C29/141C07C29/80C07C67/08C07C69/14C07C31/207
    • A first invention group is characterized by 1,3-butylene glycol which, at a period of three months after production, exhibits potassium permanganate color-fading time of at least five minutes as measured according to JIS K1351 3.10. A second invention group is characterized in that, when 1,3-butylene glycol is synthesized through hydrogenation of acetaldols in the presence of a catalyst, Raney nickel having an acetone hydrogenation activity of 2,000 ml/g-Ni/hr or more and/or a phenol hydrogenation activity of 500 ml/g-Ni/hr or more is used as the catalyst. A third invention group is characterized in that acetaldols obtained through condensation of acetaldehyde in the presence of a basic catalyst are hydrogenated in the presence of a hydrogenation catalyst and under an acidic condition. A fourth invention group is characterized in that acetaldols obtained through condensation of acetaldehyde in the presence of a basic catalyst is hydrogenated in the presence of a catalyst, to thereby synthesize 1,3-butylene glycol; a hydrogenation crude mixture is basified; alcohols are removed from the basified crude mixture; and 1,3-butylene glycol is obtained as a distillate and purified. A fifth invention group is characterized in that acetaldols are hydrogenated in the presence of a catalyst to thereby synthesize 1,3-butylene glycol; a hydrogenation crude mixture is subjected to distillation to thereby separate low-boiling-point components (L); the resultant mixture is further subjected to distillation to thereby yield 1,3-butylene glycol as a distillate; and the 1,3-butylene glycol distillate is treated with ozone. A sixth invention group is characterized in that, when acetaldols are synthesized from acetaldehyde and the acetaldols are hydrogenated in a hydrogenation step to thereby produce 1,3-butylene glycol; crotonaldehyde which is by-produced during synthesis of the acetaldols is hydrogenated together with acetaldols during the hydrogenation step, to thereby allow by-production of butanol; a butanol-containing distillate is separated from a 1,3-butylene glycol distillate through distillation; the butanol-containing distillate is subjected to distillation and a chemical treatment; and then the resultant distillate is further subjected to distillation to thereby separate low-boiling-point components and high-boiling-point components, thereby yielding butanol.