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    • 1. 发明授权
    • Process for producing a high purity aromatic polycarboxylic acid
    • 高纯度芳族多元羧酸的制备方法
    • US07547803B2
    • 2009-06-16
    • US10861497
    • 2004-06-07
    • Shinichi NagaoMasato InariJitsuo OishiKenji NakayaHiroshi Machida
    • Shinichi NagaoMasato InariJitsuo OishiKenji NakayaHiroshi Machida
    • C07C51/42
    • C07C51/43C07C51/487C07C63/333C07C63/38
    • A process for producing a high purity aromatic polycarboxylic acid (APA) by purification of a crude APA comprises: (I) aging a slurry of the crude APA in a first dispersion medium at 180 to 300° C. for 10 minutes or longer under stirring; (II) introducing the aged slurry of the APA into a column for substituting dispersion media, bringing the slurry into contact with a second dispersion medium and separating the resultant fluid into a fluid of the first dispersion medium containing impurities and a slurry of the second dispersion medium containing crystals of the high purity APA; and (III) separating the crystals of the high purity APA from the slurry of the second dispersion medium. A high purity APA having excellent hue and particle diameter can be industrially advantageously produced while the construction of the process is simplified and the consumption of energy is decreased.
    • 通过粗制APA的纯化生产高纯度芳族多元羧酸(APA)的方法包括:(I)在搅拌下将第一分散介质中粗APA的浆料在180-300℃下老化10分钟或更长时间 ; (II)将APA的老化浆液引入用于代替分散介质的塔中,使浆料与第二分散介质接触,并将所得流体分离成含有杂质的第一分散介质的流体和第二分散体的浆料 含有高纯度APA晶体的介质; 和(III)将高纯度APA的晶体与第二分散介质的浆料分离。 具有优异的色相和粒径的高纯度APA可以在工业上有利地产生,同时简化了工艺的构造并降低了能量的消耗。
    • 2. 发明授权
    • Process for producing a high purity aromatic polycarboxylic acid
    • 高纯度芳族多元羧酸的制备方法
    • US06642412B2
    • 2003-11-04
    • US10215773
    • 2002-08-12
    • Ryusuke ShigematsuMasayoshi HayashiShinichi NagaoJitsuo OishiAkio Hashimoto
    • Ryusuke ShigematsuMasayoshi HayashiShinichi NagaoJitsuo OishiAkio Hashimoto
    • C07C5142
    • C07C51/44C07C51/43C07C51/487C07C63/333C07C63/38
    • A process for producing a high purity aromatic polycarboxylic acid by purifying a crude aromatic polycarboxylic acid in accordance with the steps of (I) forming an amine salt of an aromatic polycarboxylic acid from the crude polycarboxylic acid and an amine, (II) continuously decomposing the salt in a salt decomposition reactor in operations of (i) supplying an aqueous solution of the amine salt of an organic polycarboxylic acid formed in the step of forming a salt, (ii) removing the amine and water by distillation under heating and (iii) taking out a slurry containing crystallized aromatic polycarboxylic acid, and (III) separating and recovering crystals of the aromatic polycarboxylic acid from the slurry which is taken out in the step of decomposing the salt. A high purity aromatic polycarboxylic acid having excellent hue and large particle diameters can be produced from a crude aromatic polycarboxylic acid industrially with stability at a low cost of production in accordance with a process having a simple construction.
    • 通过根据(I)从粗多羧酸和胺形成芳族多元羧酸的胺盐的步骤,通过纯化粗芳族多元羧酸来制备高纯度芳族多元羧酸的方法,(II)连续分解 在(i)提供在形成盐的步骤中形成的有机多元羧酸的胺盐的水溶液的操作中的盐分解反应器中的盐,(ii)在加热下通过蒸馏除去胺和水,以及(iii) 取出含有结晶的芳族多元羧酸的浆料,(III)从分解盐的步骤中取出的浆料中分离回收芳族多元羧酸的结晶。一种具有优异色调和大颗粒的高纯度芳族多元羧酸 直径可以由工业上粗芳香族多元羧酸以与生产成本相当低的稳定性生产 具有简单的结构。
    • 3. 发明授权
    • Process for producing a high purity aromatic polycarboxylic acid
    • 高纯度芳族多元羧酸的制备方法
    • US06455731B2
    • 2002-09-24
    • US09858487
    • 2001-05-17
    • Ryusuke ShigematsuMasayoshi HayashiShinichi NagaoJitsuo OishiAkio Hashimoto
    • Ryusuke ShigematsuMasayoshi HayashiShinichi NagaoJitsuo OishiAkio Hashimoto
    • C07C5142
    • C07C51/44C07C51/43C07C51/487C07C63/333C07C63/38
    • A process for producing a high purity aromatic polycarboxylic acid by purify a crude aromatic polycarboxylic acid in accordance with the steps of (I) forming an amine salt of an aromatic polycarboxylic acid from the crude polycarboxylic acid and an amine, (II) continuously decomposing the salt in a salt decomposition reactor in operations of (i) supplying an aqueous solution of the amine salt of an organic polycarboxylic acid formed in the step of forming a salt, (ii) removing the amine and water by distillation under heating and (iii) taking out a slurry containing crystallized aromatic polycarboxylic acid, and (III) separating and recovering crystals of the aromatic polycarboxylic acid from the slurry which is taken out in the step of decomposing the salt. A high purity aromatic polycarboxylic acid having excellent hue and large particle diameters can be produced from a crude aromatic polycarboxylic acid industrially with stability at a low cost of production in accordance with a process having a simple construction.
    • 通过根据(I)从粗多羧酸和胺形成芳族多元羧酸的胺盐的步骤纯化粗芳族多元羧酸来制备高纯度芳族多元羧酸的方法,(II)连续分解 在(i)提供在形成盐的步骤中形成的有机多元羧酸的胺盐的水溶液的操作中的盐分解反应器中的盐,(ii)在加热下通过蒸馏除去胺和水,以及(iii) 取出含有结晶芳香族多元羧酸的浆料,(III)从分解盐的工序中取出的浆料中分离回收芳族多元羧酸的结晶。 具有优异的色相和大粒径的高纯度芳族多元羧酸可以根据具有简单结构的方法在工业上以粗制芳族多元羧酸以低成本生产的稳定性产生。
    • 4. 发明授权
    • Process for producing xylylenediamine
    • 生产苯二甲胺的方法
    • US08759588B2
    • 2014-06-24
    • US13062334
    • 2009-08-27
    • Shinichi NagaoTatsuyuki KumanoKenji NakayaRyusuke ShigematsuKinji Kato
    • Shinichi NagaoTatsuyuki KumanoKenji NakayaRyusuke ShigematsuKinji Kato
    • C07C209/00
    • C07C209/48C07C211/27
    • The invention provides a process for producing xylylenediamine, including supplying a solution of phthalonitrile dissolved in a solvent to a reactor filled with a catalyst and hydrogenating the phthalonitrile to produce xylylenediamine, characterized in that the process includes halting supply of the solution; (2) bringing a washing liquid into contact with the catalyst, the washing liquid having a phthalonitrile content of 3 mass % or less and a xylylenediamine content of 1 mass % or more; and after completion of the contact, resuming supply of the solution, and employing the catalyst continuously in hydrogenation. Through the production process of the invention, the catalyst can be employed continuously for a long period of time, and the catalyst-related cost can be considerably reduced.
    • 本发明提供了一种生产苯二甲胺的方法,包括将溶于溶剂中的邻苯二甲腈溶液供应到填充有催化剂的反应器中,并使邻苯二甲腈氢化以产生苯二甲胺,其特征在于该方法包括停止溶液的供应; (2)使洗涤液与催化剂接触,洗涤液的邻苯二腈含量为3质量%以下,苯二甲胺含量为1质量%以上; 接触完成后,恢复溶液的供应,并在催化剂中连续使用催化剂。 通过本发明的制造方法,能够长时间连续使用催化剂,能够显着降低催化剂成本。
    • 6. 发明授权
    • Production method of xylylenediamine
    • 苯二甲胺的生产方法
    • US08212080B2
    • 2012-07-03
    • US12633223
    • 2009-12-08
    • Tatsuyuki KumanoKenji NakayaShinichi Nagao
    • Tatsuyuki KumanoKenji NakayaShinichi Nagao
    • C07C209/00C07C211/00
    • C07C211/27C07C209/48
    • A method of producing xylylenediamine by the hydrogenation of dicyanobenzene obtained by the ammoxidation of xylene in a high yield while prolonging the catalyst life. In the method, a molten dicyanobenzene from which compounds having a boiling point lower than that of dicyanobenzene have been removed but compounds having a boiling point higher than that of dicyanobenzene are not removed is dissolved in a solvent containing liquid ammonia. By this dissolution, at least part of dicyanobenzene polymers precipitates as insolubles. The precipitates are removed by a solid-liquid separation. By subjecting the resulting solution containing the dicyanobenzene polymers in a reduced amount to hydrogenation, xylylenediamine is produced in a high yield and the life time of hydrogenation catalyst is prolonged.
    • 通过二甲苯氨氧化得到的二氰基苯加氢制备苯二甲胺的方法,同时延长了催化剂的使用寿命。 在该方法中,除去沸点低于二氰基苯的化合物的熔融二氰基苯,但没有除去沸点高于二氰基苯的沸点的化合物溶解在含有液氨的溶剂中。 通过这种溶解,至少部分二氰基苯聚合物作为不溶物沉淀。 通过固液分离除去沉淀物。 通过将含有二氰基苯聚合物的所得溶液以减少的量进行氢化,以高产率生产苯二甲胺,延长氢化催化剂的使用寿命。
    • 7. 发明申请
    • PRODUCTION METHOD OF XYLYLENEDIAMINE
    • XYLYLENEDIAMINE的生产方法
    • US20100168474A1
    • 2010-07-01
    • US12633223
    • 2009-12-08
    • Tatsuyuki KUMANOKenji NakayaShinichi Nagao
    • Tatsuyuki KUMANOKenji NakayaShinichi Nagao
    • C07C211/43
    • C07C211/27C07C209/48
    • A method of producing xylylenediamine by the hydrogenation of dicyanobenzene obtained by the ammoxidation of xylene in a high yield while prolonging the catalyst life. In the method, a molten dicyanobenzene from which compounds having a boiling point lower than that of dicyanobenzene have been removed but compounds having a boiling point higher than that of dicyanobenzene are not removed is dissolved in a solvent containing liquid ammonia. By this dissolution, at least part of dicyanobenzene polymers precipitates as insolubles. The precipitates are removed by a solid-liquid separation. By subjecting the resulting solution containing the dicyanobenzene polymers in a reduced amount to hydrogenation, xylylenediamine is produced in a high yield and the life time of hydrogenation catalyst is prolonged.
    • 通过二甲苯氨氧化得到的二氰基苯加氢制备苯二甲胺的方法,同时延长了催化剂的使用寿命。 在该方法中,除去沸点低于二氰基苯的化合物的熔融二氰基苯,但没有除去沸点高于二氰基苯的沸点的化合物溶解在含有液氨的溶剂中。 通过这种溶解,至少部分二氰基苯聚合物作为不溶物沉淀。 通过固液分离除去沉淀物。 通过将含有二氰基苯聚合物的所得溶液以减少的量进行氢化,以高产率生产苯二甲胺,延长氢化催化剂的使用寿命。