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    • 31. 发明授权
    • Using methacrolein and methanol as dehydration and absorption agents
during production of methyl methacrylate
    • 在甲基丙烯酸甲酯生产过程中使用甲基丙烯醛和甲醇作为脱水和吸收剂
    • US5969178A
    • 1999-10-19
    • US110695
    • 1998-07-07
    • Hiroshige OkamotoHideaki Goto
    • Hiroshige OkamotoHideaki Goto
    • C07C45/35C07C45/37C07C67/42C07C67/00
    • C07C45/37C07C45/35C07C67/39C07C67/42
    • Disclosed is a method for producing methyl methacrylate, which comprises: subjecting isobutylene and/or tert-butanol to a gas phase catalytic oxidation reaction with molecular oxygen to thereby obtain gas (a) containing methacrolein gas and steam; introducing gas (a) and a methacrolein/methanol liquid mixture (I) into a dehydration tower at a lower portion thereof and at an upper portion thereof, respectively, thereby allowing the liquid mixture (I) to flow downwardly in the dehydration tower and contact countercurrently with the gas (a) in the dehydration tower, to thereby obtain a dehydrated gas mixture (b) containing methacrolein gas and methanol gas; introducing the dehydrated gas mixture (b) and a methacrolein/methanol liquid mixture (II) into an absorption tower at a lower portion thereof and at an upper portion thereof, respectively, thereby allowing the liquid mixture (II) to flow downwardly and contact countercurrently with the dehydrated gas mixture (b) in the absorption tower, thereby obtaining a methacrolein/methanol liquid mixture (III); and introducing the liquid mixture (III) into a reactor and subjecting the methacrolein and methanol, which are contained in the liquid mixture (III), to an oxidative esterification reaction in the reactor in the presence of molecular oxygen and in the presence of a palladium catalyst.
    • 公开了一种生产甲基丙烯酸甲酯的方法,其包括:使异丁烯和/或叔丁醇与分子氧进行气相催化氧化反应,从而获得含有甲基丙烯醛气体和蒸汽的气体(a); 将气体(a)和甲基丙烯醛/甲醇液体混合物(I)分别在其下部和上部引入脱水塔中,从而使液体混合物(I)在脱水塔中向下流动并接触 与脱水塔中的气体(a)逆流,从而获得含有甲基丙烯醛气体和甲醇气体的脱水气体混合物(b) 将脱水气体混合物(b)和甲基丙烯醛/甲醇液体混合物(II)分别在其下部和上部引入吸收塔中,从而使液体混合物(II)向下流动并逆流接触 与脱水气体混合物(b)在吸收塔中,由此得到甲基丙烯醛/甲醇液体混合物(III); 并将液体混合物(III)引入反应器中并使含有在液体混合物(III)中的甲基丙烯醛和甲醇在分子氧存在下在反应器中并在钯的存在下进行氧化酯化反应 催化剂。
    • 32. 发明授权
    • Free fall polymerization process for the production of polycarbonates
    • 用于生产聚碳酸酯的自由落体聚合方法
    • US5596067A
    • 1997-01-21
    • US530274
    • 1995-09-01
    • Kyosuke KomiyaYoshifumi KawakamiHiroshige Okamoto
    • Kyosuke KomiyaYoshifumi KawakamiHiroshige Okamoto
    • B01J19/24C08G64/20C08G64/30C08G64/00
    • C08G64/307B01J19/245C08G64/205B01J2219/00085B01J2219/00162Y10S159/10
    • A method for producing an aromatic polycarbonate comprises introducing to an introduction zone (having a perforated plate) a) a molten monomer mixture of an aromatic dihydroxy compound and a diaryl carbonate, or b) a molten prepolymer obtained by a process comprising reacting an aromatic dihydroxy compound with a diaryl carbonate, and allowing the monomer mixture or prepolymer in the molten state to pass downwardly through the perforated plate and fall freely through a free-fall polymerization reaction zone, thereby effecting polymerization of the monomer mixture or prepolymer during the free-fall thereof. Colorless and high quality aromatic polycarbonates are thus stably produced at a high polymerization rate for a prolonged period of time, using an apparatus which has excellent sealing properties under high vacuum and maintenance of which is easy.
    • PCT No.PCT / JP94 / 01202 Sec。 371 1995年9月1日 102(e)1995年9月1日PCT PCT 1994年7月21日PCT公布。 第WO95 / 03351号公报 日本1995年2月2日制造芳香族聚碳酸酯的方法包括向导入区(具有多孔板)导入a)芳香族二羟基化合物和碳酸二芳基酯的熔融单体混合物,或b)通过工序 包括使芳族二羟基化合物与碳酸二芳酯反应,并使熔融状态的单体混合物或预聚物向下通过多孔板,并自由落下通过自由落体聚合反应区,从而进行单体混合物或预聚物的聚合 在自由落体期间。 因此,使用在高真空下具有优异的密封性能并易于维护的装置,无色和优质的芳族聚碳酸酯在高聚合速率下长时间稳定地制备。
    • 33. 发明授权
    • Wire-wetting fall polymonization process for the production of
polycarbonates
    • 用于生产聚碳酸酯的线润滑落差聚合方法
    • US5589564A
    • 1996-12-31
    • US595081
    • 1996-02-01
    • Kyosuke KomiyaYoshifumi KawakamiHiroshige Okamoto
    • Kyosuke KomiyaYoshifumi KawakamiHiroshige Okamoto
    • B01J19/24C08G64/20C08G64/30C08G64/00
    • C08G64/307B01J19/245C08G64/205B01J2219/00085B01J2219/00162
    • A method for producing an aromatic polycarbonate comprises feeding to a feeding zone (having a foraminous plate) at least one polymerizing material selected from the group consisting of a) a molten monomer mixture of an aromatic dihydroxy compound and a diaryl carbonate, and b) a molten prepolymer obtained by a process comprising reacting an aromatic dihydroxy compound with a diaryl carbonate, and allowing the polymerizing material to pass downwardly through the foraminous plate and fall along and in contact with a wire through a wire-wetting fall polymerization reaction zone, thereby effecting polymerization of the polymerizing material during the wire-wetting fall thereof. Colorless and high quality aromatic polycarbonates are thus stably produced at a high polymerization rate for a prolonged period of time, using an apparatus which has excellent sealing properties under high vacuum and maintenance of which is easy.
    • 一种芳族聚碳酸酯的制造方法,包括向至少一种选自a)芳族二羟基化合物和碳酸二芳基酯的熔融单体混合物的聚合材料的进料区(具有多孔板)进料,b) 通过包括使芳族二羟基化合物与碳酸二芳酯反应的方法获得的熔融预聚物,并使聚合材料向下通过多孔板,并通过导线润湿的落下聚合反应区与电线一起并与其接触,从而实现 聚合材料在丝线润湿下降期间的聚合。 因此,使用在高真空下具有优异的密封性能并易于维护的装置,无色和优质的芳族聚碳酸酯在高聚合速率下长时间稳定地制备。