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    • 1. 发明授权
    • Preparation of pyrroles
    • 吡咯的制备
    • US6162928A
    • 2000-12-19
    • US553254
    • 2000-04-20
    • Joachim Wulff-DoringJoachim SimonMichael HessePeter Wahl
    • Joachim Wulff-DoringJoachim SimonMichael HessePeter Wahl
    • B01J23/44B01J23/63C07B61/00C07D207/32C07D207/323
    • C07D207/323B01J23/44B01J23/63
    • A process for preparing pyrroles of the formula I: ##STR1## where R.sub.1, R.sup.2, R.sup.3 and R.sup.4 are identical or different and are hydrogen atoms, alkyl groups having from 1 to 12 carbon atoms or cycloalkyl groups having from 3 to 12 carbon atoms, by dehydrogenation of pyrrolidines of the formula II: ##STR2## where R.sup.1, R.sup.2, R.sup.3 and R.sup.4 are as defined above, in the presence of a supported noble metal catalyst is described. In this process, the dehydrogenation is carried out at from 150 to 300.degree. C. and pressures of from 0.01 to 50 bar and the noble metal catalyst comprises from 30 to 100% by weight of:a) palladium on an oxide of a rare earth or an oxide of an element of the 4.sup.th group (transition group IV) of the Periodic Table, orb) a platinum/palladium mixture on aluminum oxide, an oxide of a rare earth or an oxide of an element of the 4.sup.th groupand from 0 to 70% by weight of alkali metal oxide or alkaline earth metal oxide.
    • 制备式I的吡咯的方法:其中R 1,R 2,R 3和R 4相同或不同,为氢原子,具有1至12个碳原子的烷基或具有3至12个碳原子的环烷基,通过脱氢 描述了在负载的贵金属催化剂的存在下,式II的吡咯烷(其中R 1,R 2,R 3和R 4如上定义)。 在该方法中,脱氢在150-300℃,压力为0.01至50巴,贵金属催化剂包含30-100重量%的:a)在稀土氧化物上的钯 或元素周期表第4族元素(过渡组IV)的氧化物,或b)在氧化铝上的铂/钯混合物,稀土的氧化物或第4族元素的氧化物, 0〜70重量%的碱金属氧化物或碱土金属氧化物。
    • 4. 发明授权
    • Preparation of aldehydes
    • 醛的制备
    • US5679869A
    • 1997-10-21
    • US567749
    • 1995-12-05
    • Werner SchnurrRolf FischerJoachim Wulff-DoringMichael Hesse
    • Werner SchnurrRolf FischerJoachim Wulff-DoringMichael Hesse
    • B01J23/10B01J23/06C07B61/00C07C45/41C07C47/02C07C47/105C07C47/14C07C47/19C07C47/198C07C47/228C07C47/28
    • B01J23/06C07C45/41
    • A process for preparing aldehydes of the general formula I ##STR1## where R.sup.1, R.sup.2 and R.sup.3 are each hydrogen, C.sub.1 -C.sub.6 -alkyl, C.sub.3 -C.sub.8 -cycloalkyl, aryl, C.sub.7 -C.sub.12 -alkylphenyl, C.sub.7 -C.sub.12 -phenylalkyl and R.sup.1 and R.sup.2 are joined together to form a 3-, 4-, 5-, 6- or 7-membered cycloaliphatic ring, R.sup.1 and R.sup.3 are each C.sub.1 -C.sub.4 -alkoxy, phenoxy, methylamino, dimethylamino or halogen, and R.sup.1 is additionally hydroxyl or amino comprises reacting a carboxylic acid or ester of the general formula II ##STR2## where R.sup.1, R.sup.2 and R.sup.3 are each as defined above, and R.sup.4 is hydrogen, C.sub.1 -C.sub.6 -alkyl, C.sub.3 -C.sub.8 -cycloalkyl, aryl, C.sub.7 -C.sub.12 -alkylphenyl or C.sub.7 -C.sub.12 -phenylalkyl, with hydrogen in the gas phase at temperatures from 200.degree. to 450.degree. C. and pressures from 0.1 to 20 bar in the presence of a catalyst whose catalytically active mass comprises from 60 to 99.9% by weight of zirconium oxide and from 0.1 to 40% by weight of one or more elements of the lanthanides.
    • 制备通式I(I)的醛的方法,其中R1,R2和R3各自为氢,C1-C6烷基,C3-C8-环烷基,芳基,C7-C12-烷基苯基,C7-C12- 苯基烷基和R 1和R 2连接在一起形成3-,4-,5-,6-或7-元环脂族环,R 1和R 3各自为C 1 -C 4 - 烷氧基,苯氧基,甲基氨基,二甲基氨基或卤素,R 1 另外羟基或氨基包括使通式II(II)的羧酸或酯与其中R 1,R 2和R 3各自如上所定义,R 4是氢,C 1 -C 6烷基,C 3 -C 8 - 环烷基,芳基,C 7 -C 12 - 烷基苯基或C 7 -C 12 - 苯基烷基,在气相中的氢气在200-450℃的温度和0.1至20巴的压力下,在催化剂存在下,其催化活性质量包含 60至99.9重量%的氧化锆和0.1至40重量%的一种或多种镧系元素。
    • 9. 发明申请
    • PROCESS FOR PREPARING TERTIARY ALKYL ESTERS OF (METH) ACRYLIC ACID HAVING AT LEAST 4 CARBON ATOMS IN THE ALKYL RADICAL
    • 用于制备具有至少四个碳原子的(甲基)丙烯酸的仲胺酸酯在碱性辐射中的方法
    • US20090023947A1
    • 2009-01-22
    • US12168342
    • 2008-07-07
    • Gunter LipowskyJoachim Wulff-DoringPeter ZurowskiJurgen Strasser
    • Gunter LipowskyJoachim Wulff-DoringPeter ZurowskiJurgen Strasser
    • C07C69/54
    • C07C67/54C07C67/04C07C67/62C07C69/54
    • A process for preparing tertiary alkyl esters of (meth)acrylic acid having at least 4 carbon atoms in the alkyl radical, comprising the steps of: (1) reacting (meth)acrylic acid with at least one olefin of the general formula I: in which R1 and R2 are an alkyl radical, and R3 is a hydrogen atom, an alkyl radical, a cycloalkyl radical, an aryl radical, an alkylcycloalkyl radical, an alkylaryl radical, a cycloalkylaryl radical, or an alkylcycloalkylaryl radical; in homogeneous phase in the presence of an acidic catalyst in a reactor, (2) discharging the resulting reaction mixture (1) from the reactor, (3) separating the discharged reaction mixture (2) into a mixture (3.1) which comprises the catalyst and a mixture (3.2) which comprises the tertiary alkyl ester of (meth)acrylic acid having at least 4 carbon atoms in the alkyl radical, and (4) removing the tertiary alkyl ester of (meth)acrylic acid having at least 4 carbon atoms in the alkyl radical from the mixture (3.2), wherein, (5) in process step (4), at least one compound S which comprises at least one N-oxyl group is added as a stabilizer.
    • 一种制备烷基中具有至少4个碳原子的(甲基)丙烯酸叔烷基酯的方法,包括以下步骤:(1)使(甲基)丙烯酸与至少一种通式Ⅰ的烯烃反应: 其中R1和R2是烷基,R3是氢原子,烷基,环烷基,芳基,烷基环烷基,烷基芳基,环烷基芳基或烷基环烷基芳基; 在反应器中存在酸性催化剂的同时,(2)将反应混合物(1)从反应器中排出,(3)将排出的反应混合物(2)分离成包含催化剂的混合物(3.1) 和包含烷基中具有至少4个碳原子的(甲基)丙烯酸叔烷基酯的混合物(3.2),和(4)除去具有至少4个碳原子的(甲基)丙烯酸的叔烷基酯 在来自混合物(3.2)的烷基中,其中(5)在方法步骤(4)中,加入至少一种包含至少一个N-氧基的化合物S作为稳定剂。