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    • 1. 发明申请
    • METHOD FOR VACUUM/REDUCED-PRESSURE REFINING AND FACILITY FOR VACUUM/REDUCED-PRESSURE REFINING
    • 用于真空/降低压力精炼的真空/降低压力精炼方法
    • WO1998029575A1
    • 1998-07-09
    • PCT/JP1997004823
    • 1997-12-25
    • NIPPON STEEL CORPORATIONSHIMOMURA, KensukeSADACHIKA, MasaruTAKANO, HironoriOGAWA, GakuABE, KenjiOKIMORI, MayumiMAKINO, NobuyukiIWASAKI, HiroshiTANAKA, TomoakiMORISHIGE, Hiroaki
    • NIPPON STEEL CORPORATION
    • C21C07/10
    • C21C7/10C21C5/28
    • Problem: dust collection in a vacuum/reduced-pressure refining process is conducted using an inexpensive filter without causing damage on and burn of the filter. Solving means: a vacuum/reduced-pressure refining vessel (1), a dry type dust collector (3) using a filter (2) and a reduced-pressure exhaust device (4) are connected sequentially by an upstream-side duct (5) and a downstream-side duct (6), and a gate valve (7) is provided to the upstream-side duct (5). At the time of starting the vaccum/reduced-pressure refining process, non-oxidizing gas is fed into the upstream side of the gate valve (7) and oxygen on the upstream side is replaced thereby substantially. Thereafter, the upstream side is closed gastightly, the gate valve (7) is opened after the closed state on the upstream side is accomplished, and the dust collector (3) is operated. It is preferable that after the vacuum/reduced-pressure refining process the gate valve (7) is closed, only the non-oxidizing gas is fed into the upstream side of the valve to recover the pressure, and then the vessel is opened to the atmosphere, and it is also preferable that after the vacuum/reduced-pressure refining process, an opening part on the duct collector (3) side is closed during the standby till the subsequent vacuum/reduced-pressure refining process is started.
    • 问题:使用便宜的过滤器进行真空/减压精炼过程中的灰尘收集,而不会损坏和燃烧过滤器。 解决方法:使用过滤器(2)和减压排气装置(4)的真空/减压精炼容器(1),干式集尘器(3),依次由上游侧管道(5) )和下游侧管道(6),并且闸门(7)设置在上游侧管道(5)上。 在开始真空/减压精炼过程时,非氧化性气体被进料到闸阀(7)的上游侧,并且上游侧的氧气基本上被替换。 此后,上游侧气密地关闭,在上游侧的关闭状态完成之后,闸阀(7)打开,并且集尘器(3)被操作。 优选的是,在真空/减压精炼处理之后,闸阀(7)关闭,只有非氧化气体被供给到阀的上游侧以回收压力,然后将容器打开至 气氛中,优选在真空/减压精制处理之后,在待机状态下,在收集器(3)侧的开口部分被关闭,直到开始后续的真空/减压精制处理。
    • 2. 发明申请
    • PROCESS FOR PRODUCING AROMATIC HYDROXYLIC COMPOUND
    • 生产芳香羟基化合物的方法
    • WO1994010115A1
    • 1994-05-11
    • PCT/JP1993001586
    • 1993-11-01
    • MITSUI PETROCHEMICAL INDUSTRIES, LTD.ARAKI, ShintaroIWASAKI, HiroshiOHNO, HiroyasuHASHIMOTO, IsaoMUKAIYAMA, Teruaki
    • MITSUI PETROCHEMICAL INDUSTRIES, LTD.
    • C07C39/04
    • C07C37/08Y02P20/52C07C39/04C07C39/07C07C39/08
    • A process for producing an aromatic hydroxylic compound represented by the general formula Ar-(OH)n (wherein Ar represents an n-valent aromatic hydrocarbon group; and n represents an integer of 1 or 2), by the acidic decomposition of a hydroperoxide represented by general formula (I); (wherein Ar and n are each as defined above) in the presence of an acid catalyst selected from among tetrafluoroboric, hexafluorosilicic and hexafluorophosphoric acids. The process enables an aromatic hydroxyclic compound to be produced in a high yield while suppressing the formation of hydroxy-acetone as a by-product. An effective suppression of the by-product formation and a higher yield of the target compound can be achieved by conducting the acidic decomposition in two stages, i.e. the first stage wherein the reaction is conducted in the first reactor at a temperature of 50-95 DEG C and the resulting reaction mixture is sent to the second reactor, and the second stage wherein the reaction is conducted at a temperature of 80-120 DEG C.
    • 由通式Ar-(OH)n(其中Ar表示n价的芳香族烃基,n表示1或2的整数)表示的芳香族羟基化合物的制造方法,通过表示的氢过氧化物的酸性分解 通式(I); (其中Ar和n各自如上所定义)在选自四氟硼酸,六氟硅酸和六氟磷酸的酸催化剂存在下反应。 该方法能够以高产率制备芳族羟基化合物,同时抑制作为副产物的羟基 - 丙酮的形成。 可以通过两步进行酸性分解来实现副产物形成的有效抑制和目标化合物的较高产率,即其中反应在第一反应器中在50-95℃的温度下进行的第一阶段 并将所得反应混合物送至第二反应器,其中反应在80-120℃的温度下进行。
    • 5. 发明申请
    • METHOD FOR PURIFYING CRUDE NAPHTHALENEDICARBOXYLIC ACID AND PROCESS FOR PREPARING POLYETHYLENE NAPHTHALATE
    • 净化萘二甲酸的方法和制备聚萘二甲酸乙二醇酯的方法
    • WO1998011047A1
    • 1998-03-19
    • PCT/JP1997003129
    • 1997-09-05
    • MITSUI CHEMICALS, INC.IWASAKI, HiroshiINOKI, SatoshiUEKI, Hiromi
    • MITSUI CHEMICALS, INC.
    • C07C51/493
    • C08G63/78C07C51/493C07C67/60C08G63/189C07C63/38C07C69/76
    • A method for preparing polyethylene naphthalate having a low impurity content from a naphthalenedicarboxylic acid containing impurities, which comprises mixing a crude naphthalenedicarboxylic acid with an aqueous ethylene glycol solution, heating the mixture to esterify a part of the naphthalenedicarboxylic acid to prepare a naphthalenedicarboxylic ester, dissolving the naphthalenedicarboxylic ester in the aqueous ethylene glycol solution, bringing hydrogenatable impurities contained in the crude naphthalenedicarboxylic acid into contact with hydrogen in the presence of a hydrogenation catalyst to hydrogenate the impurities to thereby dissolve the same in the aqueous ethylene glycol solution, crystallizing the naphthalenedicarboxylic ester, separating the crystallized naphthalenedicarboxylic ester from the aqueous ethylene glycol solution, and polycondensating the resultant naphtalenedicarboxylic ester. A method for purifying a crude naphtalenedicarboxylic acid to obtain a naphthalenedicarboxylic acid and a naphthalenedicarboxylic ester each having a low aldehyde content from a naphthalenedicarboxylic acid containing aldehydes, which comprises mixing a crude naphthalenedicarboxylic acid with an aqueous alcohol solution, heating the mixture to esterify a part of the naphthalenedicarboxylic acid to prepare a naphthalenedicarboxylic ester, dissolving the naphthalenedicarboxylic ester in the aqueous alcohol solution, bringing the aldehydes contained in the crude naphthalenedicarboxylic acid into contact with a salt of sulfurous acid to prepare an aldehyde adduct, dissolving the aldehyde adduct in an aqueous alcohol solution, and crystallizing and separating the naphthalenedicarboxylic acid and the naphthalenedicarboxylic ester.
    • 一种从含有杂质的萘二甲酸制备杂质含量低的聚萘二甲酸乙二醇酯的方法,其包括将粗萘二甲酸与乙二醇水溶液混合,加热该混合物以酯化一部分萘二甲酸以制备萘二甲酸酯,溶解 乙二醇水溶液中的萘二甲酸酯,使粗萘二羧酸中含有的可氢化杂质在氢化催化剂存在下与氢接触,氢化杂质,从而将其溶解在乙二醇水溶液中,使萘二羧酸酯结晶 从乙二醇水溶液中分离结晶的萘二甲酸酯,并使所得的萘二甲酸酯缩聚。 一种纯化粗萘二甲酸以从萘醛二羧酸含醛中分离醛含量低的萘二甲酸和萘二羧酸的方法,该方法包括将粗萘二甲酸与醇水溶液混合,加热混合物以酯化部分 的萘二甲酸以制备萘二羧酸酯,将萘二甲酸酯溶解在醇水溶液中,使粗萘二羧酸中所含的醛与亚硫酸盐接触以制备醛加合物,将醛加合物溶解在水 醇溶液,并结晶并分离萘二甲酸和萘二甲酸酯。
    • 9. 发明申请
    • PROCESS FOR PRODUCING POLYETHYLENE NAPHTHALATE
    • 生产聚乙烯亚麻酸的方法
    • WO1997017391A1
    • 1997-05-15
    • PCT/JP1996003116
    • 1996-10-25
    • MITSUI PETROCHEMICAL INDUSTRIES, LTD.IWASAKI, HiroshiISHIBASHI, MasayasuUEKI, HiromiHIRAOKA, ShojiMATSUYOSHI, ToruINOKI, Satoshi
    • MITSUI PETROCHEMICAL INDUSTRIES, LTD.
    • C08G63/189
    • C08G63/189C08G63/78C08G63/82
    • In the production of polyethylene naphthalate of the present invention, the esterification reaction between naphthalenedicarboxylic acid and ethylene glycol is conducted while causing water to be present in a reaction system from a start of reaction, in the presence of at least one catalyst selected from the group consisting of nitric, carboxylic, phosphoric and hydrogenphosphoric salts and amines according to necessity, to thereby attain an esterification ratio of 45 to 80 %, so that a liquid mixture of naphthalenedicarboxylic acid esterification reaction products containing naphthalenedicarboxylic acid, carboxyl-hydroxyethoxycarbonylnaphthalene and bis(hydroxyethoxycarbonyl)naphthalene is obtained. Subsequently, a crystal is separated from this liquid mixture to thereby obtain a mixture of esterification reaction products. Thereafter, this mixture having ethylene glycol added thereto according to necessity is subjected to polycondensation. The polyethylene naphthalate obtained by the process of the present invention ensures a low content of naphthalenedicarboxylic acid esters each having diethylene glycol skeleton therein, thereby having excellent quality, for example, in appearance.
    • 在本发明的聚萘二甲酸乙二醇酯的制造中,萘二甲酸与乙二醇之间的酯化反应是在反应开始时在反应体系中存在的条件下,在至少一种选自 根据需要由硝酸,羧酸,磷酸和氢磷酸盐和胺组成,由此达到45-80%的酯化比例,使得含萘二羧酸,羧基 - 羟基乙氧基羰基萘和双(羟基乙氧基羰基)的萘二羧酸酯化反应产物的液体混合物 )萘。 随后,从该液体混合物中分离出晶体,从而得到酯化反应产物的混合物。 此后,根据需要将具有乙二醇的混合物进行缩聚。 通过本发明的方法获得的聚萘二甲酸乙二醇酯确保了各自具有二甘醇骨架的萘二羧酸酯含量低,因此具有优异的外观质量。