-
公开(公告)号：KR100405187B1
公开(公告)日：2003-11-12
申请号：KR1020010008494
申请日：2001-02-20
Applicant: 한국과학기술연구원
IPC: C07C23/06
Abstract: PURPOSE: A method for preparing octafluorocyclobutane is provided, to inhibit the production of solid polymer and carbon by preventing the partial overheating due to the exothermic reaction during dimerization of tetrafluoroethylene, thereby improving the production yield and the stability. CONSTITUTION: The method comprises the step of supplying tetrafluoroethylene prepared by the pyrolysis of difluorochloromethane and H2O in the molar ratio of 0.1-10 into a flow layer reactor, to allow the dimerization of tetrafluoroethylene to be carried out. Preferably the flow layer reactor(13) is provided with a nozzle supplying steam. Tetrafluoroethylene is prepared at the difluorochloromethane pyrolysis device comprising a preheater(2), a super heating unit(4), a cooler and a tetrafluoroethylene distillation tower(12); is purified at the distillation tower after passing a HCl absorption tower(8), a NaOH neutralization tower(9) and a dryer(10); and is supplied into the flow layer reactor from the center of the distillation tower. Preferably the reaction temperature is 550-700 deg.C, and the reaction contact time is 1-30 sec.
Abstract translation: 目的：提供一种制备八氟环丁烷的方法，通过防止由于四氟乙烯二聚过程中的放热反应引起的部分过热而抑制固体聚合物和碳的生成，从而提高产量和稳定性。 构成：该方法包括将通过将二氟氯甲烷和H 2 O以0.1-10的摩尔比热解而制备的四氟乙烯供入流动层反应器中的步骤，以允许进行四氟乙烯的二聚。 优选地，流动层反应器（13）设置有供应蒸汽的喷嘴。 在包括预热器（2），超级加热单元（4），冷却器和四氟乙烯蒸馏塔（12）的二氟氯甲烷热解装置处制备四氟乙烯; 在通过HCl吸收塔（8），NaOH中和塔（9）和干燥器（10）之后在蒸馏塔中纯化; 并从蒸馏塔的中心供应到流动层反应器中。 优选反应温度为550-700℃，反应接触时间为1-30秒。
-
公开(公告)号：KR100359874B1
公开(公告)日：2002-11-07
申请号：KR1020000006400
申请日：2000-02-11
Applicant: 한국과학기술연구원
IPC: B01J27/06 , B01J27/125 , B01J27/128 , C07D317/36
Abstract: 알킬렌옥사이드와 이산화탄소를 반응시켜 [화학식 2]로 표현되는 알킬렌카보네이트를 합성하는데 사용되는 하기 [화학식 1]로 표현되는 촉매.
[화학식 1]
L
m MX
n
여기에서, L은 피리딘계 화합물이고,
M은 Zn, Fe, Mn, Pb, In에서 선택되는 금속원자이고,
X는 Cl, Br, I에서 선택되는 할로겐 원자이고,
m은 1 또는 2, n은 2 또는 3이다.
[화학식 2]
(단, R
1 과 R
2 는 각각 독립적으로 수소, C
1 ~C
4 의 알킬기 또는 페닐기이다.)-
公开(公告)号：KR100302458B1
公开(公告)日：2001-09-22
申请号：KR1019990027756
申请日：1999-07-09
Applicant: 한국과학기술연구원
IPC: C07C19/08
Abstract: 본발명은안티모니염화불화물을촉매로사용하여클로로플루오로카본(CFC) 또는하이드로클로로플루오로카본(HCFC)을합성하는액상반응에있어서, 복수개의분배관, 분배관과연결되어있는침액관, 드래프트튜브를설치하여불화수소를반응기내벽주변에분산·공급함으로써상기안티모니염화불화물의고형화를억제하고고형촉매의벽면부착을억제하는불화수소의공급방법에관한것이다.
-
公开(公告)号：KR1020010081223A
公开(公告)日：2001-08-29
申请号：KR1020000006400
申请日：2000-02-11
Applicant: 한국과학기술연구원
IPC: B01J27/06 , B01J27/125 , B01J27/128 , C07D317/36
CPC classification number: C07D317/36 , B01J23/06 , B01J23/08 , B01J23/14 , B01J23/34 , B01J23/745 , B01J31/1658 , B01J31/181 , B01J2531/26 , B01J2531/33 , B01J2531/72 , B01J2531/842
Abstract: PURPOSE: A highly activated catalyst for synthesizing alkylene carbonate is provided to synthesize alkylene carbonate at low temperature and pressure in good yield and easily separate the catalyst from the product. CONSTITUTION: When preparing alkylene carbonate, which is expressed by Formula 2, by reacting alkylene oxide with carbon dioxide, a catalyst expressed by LmMXn(Formula 1) is used. In Formula 1, L is pyridine compound; M is an atom selected from Zn, Fe, Mn, Pb and In; X is a halogen atom selected from Cl, Br and I; m is 1 or 2; and n is 2 or 3. The pyridine compound L can have the structure of Formulas 3, 4 or 5. The metal halide compound MXn can be ZnX2, FeX2, FeX3, MnX2, PbX2 or InX3.
Abstract translation: 目的：提供用于合成碳酸亚烷基酯的高活性催化剂，以低产率和低压合成碳酸亚烷基酯，并容易将催化剂与产物分离。 构成：使用式2表示的碳酸亚烃通过使环氧烷与二氧化碳反应，使用LmMXn（式1）表示的催化剂。 在式1中，L是吡啶化合物; M是选自Zn，Fe，Mn，Pb和In的原子; X是选自Cl，Br和I的卤素原子; m为1或2; 吡啶化合物L可以具有式3,4或5的结构。金属卤化物MXn可以是ZnX2，FeX2，FeX3，MnX2，PbX2或InX3。
-
-
Patent Agency Ranking
公开(公告)号：KR1020000004094A
公开(公告)日：2000-01-25
申请号：KR1019980025489
申请日：1998-06-30
Applicant: 한국과학기술연구원
IPC: C25B1/24
Abstract: PURPOSE: A production method of fluorine is provided to prevent the breakage of the anode by the impact vibration while exploding inside of electrolytic tub. CONSTITUTION: A production method of fluorine has the steps of: attaching a small bolt(10) inside of a skirt(5); establishing plural spacers for keeping the interval insulated with covering a cap nut(11) made of fluorine resin on the bolt to support anode carbon; the spacers prevents for the pieces of carbon electrode to turn down when the anode carbon is damaged and so the pieces are prevented being deeply deposited in the electrolytic solution or being contacted anode with the skirt.
Abstract translation: 目的：提供氟的生产方法，以防止在电解槽内部爆炸时冲击振动破坏阳极。 构成：氟的制造方法具有以下步骤：在裙部（5）内部附接小螺栓（10）; 建立多个间隔件，用于通过在螺栓上覆盖由氟树脂制成的盖螺母（11）来保持间隔绝缘以支撑阳极碳; 当阳极碳损坏时，间隔物防止碳电极片向下转动，因此防止了这些片被深深沉积在电解液中或与裙边接触的阳极。
-
公开(公告)号：KR100225879B1
公开(公告)日：1999-10-15
申请号：KR1019950046195
申请日：1995-12-02
Applicant: 한국과학기술연구원
IPC: C07C29/08
Abstract: 서로 비점이 매우 근접하여 일반적인 증류방법으로는 분리가 불가능하였던 펜타플루오로에탄(HFC-125)과 1,1,1-트리플루오로에탄(HFC-143a)의 분리방법으로서, HFC-125가 HCl과 공비혼합물을 형성함에 따라 그 비점이 크게 저하되는 특성을 이용하여, 분리탑에 HFC-125와 HFC-143a의 2성분계 혼합물 또는 부가적인 성분들이 추가로 함유된 혼합물과 HCl을 첨가하여 탑정으로는 HFC-125/HCl 공비혼합물을 분리시키고 탑저로는 FC-143a 또는 HFC-143a와 부가성분과의 혼합물을 농축 분리한 후, HFC-125와 HFC-143a를 각각 분리할 수 있다.
-
公开(公告)号：KR100137097B1
公开(公告)日：1998-04-27
申请号：KR1019940018895
申请日：1994-07-30
Applicant: 한국과학기술연구원
IPC: C07C19/08
Abstract: 본 발명은 트리클로로에틸렌과 불화수소를 촉매의 존재하에 반응시켜 1,1,1-트리플루오로-2-클로로에탄을 생성하고, 이를 불화수소와 반응시켜 1,1,1,2-테트라플루오에탄을 제조하는 방법에 있어서, 반응기로 재순환되는 미반응 원료 중의 수분을 제거하여 수분 농도를 300ppm 이하로 유지함으로써 촉매의 활성 저하를 억제하는 것을 특징으로 하는 방법에 관한 것이다.
본 발명의 방법은 종래의 HFC-13a 제조 방법에서는 규명되지 않은 촉매활성 저하를 방지하는 방법으로, 종래 방법에 비하여 보다 장시간 동안 촉매의 활성을 유지시킬수 있다.-
公开(公告)号：KR1019960008638B1
公开(公告)日：1996-06-28
申请号：KR1019930027090
申请日：1993-12-09
Applicant: 한국과학기술연구원
IPC: C07C17/38
Abstract: Water is removed from chlorodi-fluoromethane by contacting chlorodi-fluoromethane with absorbent solution containing calcium chloride in concentration of above 5 wt% at gas-liquid contacting equipment like packed tower, spray tower or plate tower. A very small amount of chlorodi-fluoromethane dissolving in the absorbent solution can be recovered by heating the absorbent solution to above 30 deg. C.
Abstract translation: 将氯代二氟甲烷与含氯化钙的吸收剂溶液的浓度在5重量％以上的气液接触设备如填充塔，喷雾塔或塔板塔接触，从氯二氟甲烷中除去水。 可以通过将吸收剂溶液加热至30℃以上来回收溶解在吸收剂溶液中的非常少量的氯代 - 二氟甲烷。 C。
-
-
-
-
-
-
-
-
-
Search Results
77
records
(took 0.025 seconds)
