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    • 1. 发明公开
    • 2,6-디메틸나프탈렌의 제조 방법
    • 2,6-二甲基苯乙烯的制备方法
    • KR1020020026840A
    • 2002-04-12
    • KR1020010060374
    • 2001-09-28
    • 가부시키가이샤 고베 세이코쇼
    • 요시다신고모토유키마사히로우에무라도모키야마모토고지
    • C07C15/24
    • C07C7/14C07C15/24
    • PURPOSE: A method for preparing 2,6-dimethylnaphthalene is provided, to obtain a highly pure 2,6-dimethylnaphthalene having a purity above 99% even when a mixture of dimethylnaphthalene isomers containing 5 wt.% or more of 2,7-dimethylnaphthalene is used as a feedstock. CONSTITUTION: The method comprise the steps of carrying out the crystallization and solid-liquid separation of a liquid primarily containing dimethylnaphthalene isomers in the condition that the ratio of the content of 2,6-dimethylnaphthalene in the mother liquor to that of 2,7-dimethylnaphthalene is 1 or more, to allow the liquid to be separated into a cake containing the dimethylnaphthalene isomers and a mother liquor, wherein the content of 2,6-dimethylnaphthalene in the cake is 60% or more and the content of 2,7-dimethylnaphthalene is 6.5% or less; and carrying out the separation and purification of the cake.
    • 目的:提供2,6-二甲基萘的制备方法,即使使用含有5重量%以上的2,7-二甲基萘的二甲基萘异构体的混合物,得到纯度高于99%的高纯度2,6-二甲基萘 用作原料。 构成:该方法包括以下步骤:主要包含二甲基萘异构体的液体的结晶和固液分离,条件是母液中2,6-二甲基萘的含量与2,7-二 二甲基萘为1以上,使液体分离成含有二甲基萘异构体的滤饼和母液,其中,滤饼中2,6-二甲基萘的含量为60%以上,含量为2,7- 二甲基萘为6.5%以下; 并进行蛋糕的分离和净化。
    • 6. 发明公开
    • 고순도 나프탈렌디카복실산의 제조방법
    • 生产高纯度萘二甲酸的方法
    • KR1020030033958A
    • 2003-05-01
    • KR1020020064450
    • 2002-10-22
    • 가부시키가이샤 고베 세이코쇼
    • 모토유키마사히로우에무라도모키야마모토고지
    • C07C51/48
    • C07C51/487C07C51/265C07C51/43C07C51/47C07C63/26C07C63/38
    • PURPOSE: To produce a desired high purity terephthalic acid/ naphthalenedicarboxylic acid mixture at a low cost and efficiently by using crude naphthalenedicarboxylic acid as a raw material and making use of existing facilities for refining terephthalic acid. CONSTITUTION: The raw material prepared so that the content of the crude naphthalenedicarboxylic acid is in the range of 0.1-10% by mass of crude terephthalic acid is subjected to at least following steps of £I| and £II|: £I| a step to dissolve the raw material mixture in water at a high temperature and pressure and bring it into contact with hydrogen in the presence of a catalyst, and £II| a step to subject a reaction product obtained in the above step £I| to multistage crystallization and solid/liquid separation while decreasing the pressure and temperature, resulting in an acid mixture that is rich in the naphthalenedicarboxylic acid and the terephthalic acid.
    • 目的:通过使用粗萘二甲酸作为原料,利用现有的精制对苯二甲酸的设备,以低成本,高效率地生产所需的高纯度对苯二甲酸/萘二甲酸混合物。 构成:将原料萘二甲酸的含量在粗制对苯二甲酸的0.1〜10质量%范围内制备的原料进行至少以下步骤: 和£II |:£I | 在高温和高压下将原料混合物溶解在水中并使其在催化剂存在下与氢接触的步骤, 在上述步骤1中获得的反应产物的步骤 在降低压力和温度的同时进行多级结晶和固/液分离,导致富含萘二甲酸和对苯二甲酸的酸混合物。
    • 10. 发明公开
    • 2,6-디메틸나프탈렌의 농축방법
    • 浓缩2,6-二甲基苯乙烯的方法
    • KR1020030007154A
    • 2003-01-23
    • KR1020020040715
    • 2002-07-12
    • 가부시키가이샤 고베 세이코쇼
    • 나카오노보루야마모토고지모토유키마사히로
    • C07C7/12
    • C07C7/13C07C15/24
    • PURPOSE: To provide a method for selectively concentrating 2,6- dimethylnaphthalene from a mixture of dimethylnaphthalene isomers using an adsorption column through maximally eliciting adsorbent performance. CONSTITUTION: This method for selectively concentrating 2,6- dimethylnaphthalene from the mixture of the dimethylnaphthalene isomers using the adsorption column for attaining a high concentration level involves setting the value of (u¬1/3/ε)d¬-5/3£m¬5/3sec¬-1/3kg¬-1| at >=14 to enable the rate of concentration of 2,6-dimethylnaphthalene to 2,7-dimethylnaphthalene to be 2.0 £where, u (m/s) is a linear velocity of the mixture of the dimethylnaphthalene isomer solution to be fed to the adsorption column; ε (kg/m¬3) is a packing density of the adsorbent; and d (m) is a granular size of the adsorbent|.
    • 目的:提供一种使用吸附塔从二甲基萘异构体的混合物中选择性浓缩2,6-二甲基萘的方法,通过最大限度地引发吸附剂性​​能。 构成:使用吸附塔从二甲基萘异构体的混合物中选择性浓缩2,6-二甲基萘以获得高浓度水平的方法包括设定(u-1/3 /ε)d-5/3 m¬5/3sec¬-1 /3kg¬-1 | 在≥14时,使2,6-二甲基萘浓度为2,7-二甲基萘的速度为2.0‰,其中u(m / s)是待进料的二甲基萘异构体溶液的混合物的线速度 吸附塔; ε(kg / m 3)是吸附剂的填充密度; d(m)为吸附剂的粒径。