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    • 4. 发明授权
    • Process for the production of 2,3,5-trimethylbenzoquinone
    • 生产2,3,5-三甲基苯醌的方法
    • US4828762A
    • 1989-05-09
    • US947503
    • 1986-12-29
    • Tomiya IsshikiTomoyuki YuiMitsuo AbeMasahiro JonoHideo Uno
    • Tomiya IsshikiTomoyuki YuiMitsuo AbeMasahiro JonoHideo Uno
    • B01J27/08B01J27/122C07C46/08
    • B01J27/122B01J27/08C07C46/08
    • A process for the production of 2,3,5-trimethylbenzoquinone (TMBQ) from 2,3,6-trimethylphenol (TMP) is described, comprising contacting TMP with oxygen or an oxygen containing gas in a medium of water and an aliphatic alcohol having from 5 to 10 carbon atoms in the presence of catalyst of a copper halogen complex represented by the formula as shown below or a mixture of the copper halogen complex and an alkali metal halide or a mixture of the copper halogen complex, an alkali metal halide and cupric hydroxide and/or cuprous chlorideM.sub.l [Cu(II).sub.m X.sub.n ].sub.pwherein M is an alkali metal or ammonium, Cu(II) is a divalent copper, X is a halogen atom, l is an integer of 1 to 3, m is 1 or 2, n is an integer or 3 to 8, p is 1 or 2, and l+2mp=np. The process is carried out in a batch system, a semi-batch system or in a continuous flow system. The third mentioned catalyst system is most effectively utilized in the semi-batch system. The present process yields various advantages; for example, TMBQ can be produced with high selectivity, and since the reaction is performed in a specific medium (the medium is heterogeneous because the alcohols are immiscible or only slightly miscible with water) and TMBQ is soluble in the alcohol layer, while the catalyst is soluble in the water layer, the TMBQ can be easily separated and reuse of the catalyst can be accomplished by a simplified procedure. TMBQ is a useful compound as an intermediate for use in the preparation of Vitamin E.
    • 描述了从2,3,6-三甲基苯酚(TMP)生产2,3,5-三甲基苯醌(TMBQ)的方法,包括将TMP与氧或含氧气体在水和脂族醇的介质中接触, 在由下式表示的铜卤素络合物的催化剂存在下的5至10个碳原子或铜卤素络合物和碱金属卤化物的混合物或铜卤素络合物,碱金属卤化物和碱金属卤化物的混合物 氢氧化铜和/或氯化亚铜M1 [Cu(II)mXn] p其中M为碱金属或铵,Cu(II)为二价铜,X为卤素原子,l为1〜3的整数,m 为1或2,n为整数或3至8,p为1或2,l + 2mp = np。 该方法在分批系统,半分批系统或连续流系统中进行。 第三种催化剂体系在半分批系统中最有效地利用。 本方法产生各种优点; 例如,可以高选择性地制备TMBQ,并且由于反应在特定介质中进行(介质是异质的,因为醇是不混溶的或仅与水轻微混溶),并且TMBQ可溶于醇层,而催化剂 可溶于水层,TMBQ可以容易地分离,催化剂的再利用可以通过简化的程序完成。 TMBQ是一种有用的化合物,作为用于制备维生素E的中间体。
    • 9. 发明授权
    • Process for producing .alpha.-methyl styrene-methyl
methacrylate-acrylonitrile thermoplastic resin
    • 制备α-甲基苯乙烯 - 甲基丙烯酸甲酯 - 丙烯腈热塑性树脂的方法
    • US4448580A
    • 1984-05-15
    • US421777
    • 1982-09-23
    • Mitsuo AbeSyuji TsuchikawaTeizo FukutaTsugio Asakawa
    • Mitsuo AbeSyuji TsuchikawaTeizo FukutaTsugio Asakawa
    • C08F2/00C08F2/22C08F212/00C08F212/10C08F212/12C08L25/12C08L25/16C08L55/02C08F257/02C08L33/12
    • C08L25/12C08F212/12C08L25/16C08L55/02
    • A thermoplastic resin having an excellent thermal stability and a high heat resistance is prepared by initiating polymerization of 65-85 parts by weight of a monomer mixture (A) consisting of 50-85% by weight of .alpha.-methylstyrene, 3-20% by weight of methyl methacrylate, 2-20% by weight of acrylonitrile, and 0-25% by weight of an aromatic alkenyl compound other than .alpha.-methylstyrene, continuously or intermittently adding, on the way of the polymerization, 2-15 parts by weight of a monomer (B) consisting of acrylonitrile or a mixture thereof with an aromatic alkenyl compound other than .alpha.-methylstyrene to the polymerization system while continuing the polymerization, further adding to the polymerization system 5-25 parts by weight of a monomer (C) consisting of an aromatic alkenyl compound other than .alpha.-methylstyrene, or a mixture thereof with acrylonitrile, and continuing the polymerization to complete the polymerization, the total amount of monomers (A), (B), and (C) being 100 parts by weight. Further, a thermoplastic resin composition having an excellent thermal stability, a high heat resistance and a high impact strength is prepared by mixing the thermoplastic resin thus obtained with a graft copolymer obtained by grafting 60-30 parts by weight of a monomer mixture consisting of 65-80% by weight of an aromatic alkenyl compound and 35-20% by weight of acrylonitrile on 40-70 parts by weight of a diene rubbery polymer in such a proportion that the composition contains 10-30% by weight of the rubbery polymer.
    • 通过引发65-85重量份由50-85重量%的α-甲基苯乙烯,3-20重量%的α-甲基苯乙烯组成的单体混合物(A)的引发聚合来制备具有优异的热稳定性和高耐热性的热塑性树脂 重量的甲基丙烯酸甲酯,2-20重量%的丙烯腈和0-25重量%的除α-甲基苯乙烯之外的芳族烯基化合物,在聚合过程中连续或间歇地加入2-15重量份 由丙烯腈或其与α-甲基苯乙烯以外的芳族烯基化合物的混合物组成的单体(B),同时继续进行聚合,进一步向聚合体系中加入5-25重量份的单体(C) 由除α-甲基苯乙烯以外的芳族烯基化合物或其与丙烯腈的混合物组成,并继续聚合以完成聚合,单体(A),(B)和(C) ng 100重量份。 此外,通过将由此获得的热塑性树脂与通过接枝60-30重量份的由65重量份组成的单体混合物获得的接枝共聚物来制备具有优异的热稳定性,高耐热性和高冲击强度的热塑性树脂组合物 -80重量%的芳族链烯基化合物和35-20重量%的丙烯腈,40-70重量份的二烯橡胶状聚合物的比例为组合物含有10-30重量%的橡胶状聚合物。