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公开(公告)号：KR100367574B1
公开(公告)日：2003-01-15
申请号：KR1019990036896
申请日：1999-09-01
Applicant: 한국과학기술연구원
Abstract: PURPOSE: A chromatography separation method using radially directed electric field is provided, which can control residence time of object material in the radial electric field according to the strength of electric field and relative polarity of an object material, a solvent and a packing material and can increase separation efficiency. Therefore the system can achieve high efficiency and high separation performance and also can be applied to chromatography of industrial scale. CONSTITUTION: The method comprises: i) applying voltage of more than 1V to chromatography column to form an electric field radially 1-10 minutes before charging sample; and ii) controlling residence time of the object material by controlling the strength of electric field. The equipment is characterized by a chromatography column (5), wherein an inside electrode (7) and an outside electrode (8) are installed inside and outside of the column respectively to charge electric field for separating an object material from a solvent and a packing material, the column having a channel with an inlet (11) and an outlet (12) for a coolant or heating media to flow.
Abstract translation: 目的：提供一种利用径向电场的色谱分离方法，该方法可以根据电场强度和目标物质，溶剂和包装材料的相对极性来控制目标物质在径向电场中的停留时间，并且可以 提高分离效率。 因此该系统可以实现高效率和高分离性能，也可以应用于工业规模的色谱。 构成：该方法包括：i）在填充样品之前，向色谱柱施加大于1V的电压以在放电1-10分钟之前形成电场; 和ii）通过控制电场的强度来控制目标材料的停留时间。 该设备的特征在于色谱柱（5），其中内部电极（7）和外部电极（8）分别安装在色谱柱的内部和外部以填充用于从溶剂和填料中分离目标物质的电场 材料，该塔具有带有用于冷却剂或加热介质流动的入口（11）和出口（12）的通道。
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公开(公告)号：KR100296738B1
公开(公告)日：2001-10-27
申请号：KR1019980015784
申请日：1998-05-01
Applicant: 한국과학기술연구원
IPC: C08B37/08
Abstract: PURPOSE: Provided is a process for producing chitosan oligosaccharide from polymer chitosan by hydrolysis using an edible organic acid useful for human bodies, which can be used for food additives and medical supplies. CONSTITUTION: The chitosan oligosaccharide is produced by dissolving the polymer chitosan in a water solution of the edible organic acid and performing the hydrolysis in an autoclave by applying microwave, wherein the edible organic acid is selected from the group consisting of tartaric acid, pyruvic acid, ascorbic acid, citric acid, lactic acid, propionic acid, acetic acid, and a mixture thereof and the concentration of the water solution of the organic acid is 3-8wt.%.
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Patent Agency Ranking
公开(公告)号：KR1020000050905A
公开(公告)日：2000-08-05
申请号：KR1019990001053
申请日：1999-01-15
Applicant: 한국과학기술연구원 , 에스케이케미칼주식회사
IPC: C07C7/10
Abstract: PURPOSE: A method for separating 2,6-dimethylnaphthalene with high purity is provided which solves the problem of loss of 2,6-dimethylnaphthalene and economical efficiency due to addition of the pre-treatment process and easily obtains the 2,6-dimethylnaphthalene with high purity. CONSTITUTION: A method comprises steps of: (i) selectively separating the mixture of dimethylnaphthalene isomer containing 2,6-dimethylnaphthalene from naphthalene mixture containing dimethylnaphthalene isomers by fractional distillation or recrystallization; and (ii) separating the 2,6-dimethylnaphthalene from the mixture of dimethylnaphthalene isomer containing 2,6-dimethylnaphthalene by pressure crystallization using solvent.
Abstract translation: 目的：提供一种分离高纯度2,6-二甲基萘的方法，其解决了由于加入预处理过程而导致2,6-二甲基萘损失和经济性的问题，并且容易地获得2,6-二甲基萘与 高纯度 构成：一种方法包括以下步骤：（i）通过分馏或重结晶从包含二甲基萘异构体的萘混合物中选择性地分离含有2,6-二甲基萘的二甲基萘异构体的混合物; 和（ii）通过使用溶剂的压力结晶从2,6-二甲基萘的二甲基萘异构体的混合物中分离出2,6-二甲基萘。
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公开(公告)号：KR100316139B1
公开(公告)日：2001-12-20
申请号：KR1019990001053
申请日：1999-01-15
Applicant: 한국과학기술연구원 , 에스케이케미칼주식회사
IPC: C07C7/10
Abstract: 디메틸나프탈렌이성체들을포함한나프탈렌계혼합물로부터재결정법이나분별증류법등을통해 2,6-디메틸나프탈렌을포함한디메틸나프탈렌이성질체의혼합물을선택적으로분리한후에, 용매존재하에서의가압결정에의해이로부터고순도의 2,6-디메틸나프탈렌을분리함으로써, 분리효율을향상시키고산화성고분자반응을억제시켜높은순도의분리를용이하게하며, 반응처리시간을현저히단축시켜생산성을향상시킬수 있다.
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公开(公告)号：KR1020000051069A
公开(公告)日：2000-08-16
申请号：KR1019990001307
申请日：1999-01-18
Applicant: 한국과학기술연구원
IPC: C01G23/00
CPC classification number: C01G23/006 , C01P2004/64
Abstract: PURPOSE: A process for preparing barium titanate powder by the hydrothermal reaction of a titanium organic metal compound with a barium salt is provided which gives the superfine barium titanate powder at a relatively low temperature. CONSTITUTION: A process for producing a stoichiometric quantity of barium titanate useful in the field of electronics comprises the steps of diluting a titanium 2-alkoxyethoxide precursor in an organic solvent, forming a barium-titanium complex by mixing with an aqueous solution of a barium salt, carrying out hydrothermal reaction after addition to a concentrated alkali solution at a pH higher than 14, and purifying through washing processes. The process can produce the title compound with a uniform particle size without using a high-temperature electric furnace.
Abstract translation: 目的：提供通过钛有机金属化合物与钡盐的水热反应制备钛酸钡粉末的方法，其使超细钛酸钡粉末处于较低温度。 构成：用于生产电子学领域的化学计量的钛酸钡的方法包括以下步骤：在有机溶剂中稀释钛2-烷氧基乙醇前体，通过与钡盐水溶液混合形成钡 - 钛络合物 在加到pH高于14的浓碱溶液中进行水热反应，并通过洗涤过程进行纯化。 该方法可以在不使用高温电炉的情况下制备具有均匀粒度的标题化合物。
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