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公开(公告)号：KR1019940002148A
公开(公告)日：1994-02-16
申请号：KR1019920012140
申请日：1992-07-08
Applicant: 한국과학기술연구원
IPC: C01F11/46
Abstract: 본 발명은 불화수소 제조시에 형석과 황산의 반응결과 생성되는 반응생성물인 석고의 이송을 하는데 사용되는 날개식 콘베이어에 관한 것이다.
본 발명은 밀폐된 콘베이어의 내부로 공급되는 고온의 석고의 이송과정에서 이송과 동시에 냉각이 이루어지도록 하기 위한 방편으로 석고분체가 위치하는 홈통의 주위에 냉각수가 채워지는 냉각재킷을 설치하는 한편 홈통을 따라 이동하면서 석고분체를 이송하는 이송날개를 서로 다른 형태의 개방홈을 갖는 2종류이상으로 하여 이들을 교대로 구동체인에 배열한 구성으로 이루어져 있다.
이같은 본 발명은 2종류이상의 이송날개에 의한 분체의 이송도중 뒤섞임 작용과 냉각재킷에 의한 냉각작용에 의해 석고분체의 냉각이 보다 효율적으로 이루어짐에 따라 석고분체의 이송시 불화수소의 대기중 방출을 억제하는 효과가 있다.-
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Patent Agency Ranking
公开(公告)号：KR100405895B1
公开(公告)日：2003-11-14
申请号：KR1020010008495
申请日：2001-02-20
Applicant: 한국과학기술연구원
IPC: C07C23/06
CPC classification number: C07C23/06 , C07C17/269 , C07C17/281 , C07C21/185
Abstract: A method of simultaneous and selective perpararation of hexafluoropropylene and octafluorocyclebutane comprising the steps of: (a) thermally decomposing difluorochloromethane to obtain tetrafluoroethylene and then supplying the resulting tetrafluoroethylene into a bed reactor equipped with a distributor for supplying steam; and (b) supplying steam into a flow of tetrafluoroethylene supplied into the fluidized bed reactor, through a distributor for supplying steam at a certain molar ratio of tetrafluoroethylene/stream, and then performing dimerization of tetrafluoroethylene in the fluidized bed reactor under an atmospheric pressure.
Abstract translation: 一种同时选择性地加入六氟丙烯和八氟环丁烷的方法，包括以下步骤：（a）将二氟氯甲烷热分解得到四氟乙烯，然后将所得的四氟乙烯供入装备有用于供应蒸汽的分配器的床式反应器; （b）通过用于以一定摩尔比率的四氟乙烯/料流供给蒸汽的分配器，将蒸汽供入供入流化床反应器的四氟乙烯流中，然后在大气压力下在流化床反应器中进行四氟乙烯的二聚反应。
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公开(公告)号：KR100295283B1
公开(公告)日：2001-11-14
申请号：KR1019980057663
申请日：1998-12-23
Applicant: 한국과학기술연구원
IPC: C09K5/04
Abstract: 본 발명은 제 1 성분으로 디플루오로메탄(CH
2 F
2 , HFC-32), 제 2 성분으로 1,1,1,2-테트라플루오로에탄(CF
3 CH
2 F, HFC-134a)를 포함하고, 제 3 성분으로 1,1,1,2,3,3,3-헵타플루오로프로판(CH
3 CHFCF
3 , HFC-227ea), 이소부탄(C
4 H
10 R-600a) 및 1,1,1,2,3,3-헥사플루오로프로판(CHF
2 CHFCF
3 , HFC0236ea)으로 이루어진 군 중에서 선택된 어느 한 성분을 포함하는 HCFC-22 대체용 냉매 혼하물을 제공한다.-
公开(公告)号：KR1020010011158A
公开(公告)日：2001-02-15
申请号：KR1019990030399
申请日：1999-07-26
Applicant: 한국과학기술연구원
IPC: C07D317/00
Abstract: PURPOSE: A method for preparing alkylene carbonate is provided which can synthesize high yield of alkylene carbonate under unstringent condition by using lithium halide as a catalyst. The catalyst has a high catalytic activity, and is easy to separate from a product and to reprocess the catalyst. CONSTITUTION: The alkaline carbonate of formula (1) is prepared by reacting alkylene oxide with carbon dioxide using one or more lithium halides selected from LiX (wherein, X=Cl, Br or I) as the catalyst, wherein R1 and R2 are independently hydrogen or C1-C4 alkyl. The conditions are as follows: 80-170deg.C of a reaction temperature and 10-100 atm of an air pressure.
Abstract translation: 目的：提供一种制备碳酸亚烷基酯的方法，其可以通过使用卤化锂作为催化剂，在非收缩条件下合成高产率的碳酸亚烷基酯。 催化剂具有高催化活性，并且容易与产物分离并重新加工催化剂。 构成：通过使用一种或多种选自LiX（其中，X = Cl，Br或I）的卤化锂作为催化剂使烯化氧与二氧化碳反应制备式（1）的碱式碳酸酯，其中R1和R2独立地为氢 或C 1 -C 4烷基。 条件如下：80-170℃的反应温度和10-100atm的空气压力。
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公开(公告)号：KR1020000020218A
公开(公告)日：2000-04-15
申请号：KR1019980038729
申请日：1998-09-18
Applicant: 한국과학기술연구원
IPC: C07C273/04
CPC classification number: C07C273/1809 , C07C2601/14 , C07C275/06 , C07C275/18 , C07C275/24
Abstract: PURPOSE: A preparation method of N,N-substituted urea by reacting amine with carbon monoxide and oxygen in the presence of selenium compound catalysts and alkali carbonate co catalysts is provided which can produce in high yield, increases the productivity by reducing the amount of a catalyst used and generate almost no side-products. CONSTITUTION: A method for making N,N-substituted urea of formula (I) which comprises reacting amine with a mixture of gases of CO/O2 in the presence of catalysts of one or more selenium compounds selected from SeO2, (CH3O)Se(O)(OH) and (CH3CH2O)Se(O)(OH) as a major catalyst and alkali carbonates as a co catalyst and a solvent at 80-250°C at 30-200 atm. The formula(I) is RNH-C(=O)-NHR (I) in which R is 1-18C alkyl, cyclohexyl, phenyl or benzyl. The mole number of the selenium compound to the amine and the co catalysts to the major catalysts are 1/12,800-1/200 and 0.1-10 respectively and the mole ratio of CO to O2 is 95: 5-55: 45.
Abstract translation: 目的：提供在硒化合物催化剂和碱金属碳酸盐助催化剂存在下使胺与一氧化碳和氧反应的N，N-取代的脲的制备方法，其可以高产率生产，通过减少 使用的催化剂几乎不产生副产物。 构成：制备式（I）的N，N-取代脲的方法，其包括在一种或多种选自SeO 2，（CH 3））Se的硒化合物的催化剂存在下，使胺与CO / O 2气体的混合物反应 O）（OH）和（CH 3 CH 2 O）Se（O）（OH）作为主要催化剂，碱式碳酸酯作为助催化剂，溶剂在80-250℃，30-200atm。 式（I）是其中R是1-18C烷基，环己基，苯基或苄基的RNH-C（= O）-NHR（I）。 硒化合物与胺和主要催化剂的助催化剂的摩尔数分别为1 / 12,800-1 / 200和0.1-10，CO与O 2的摩尔比为95:5-555:45。
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