Abstract:
본 발명에서는 헥사플루오로프로필렌(HFP)으로부터 1,2,3,3,3-펜타플루오로프로펜(HFO-1225ye)을 제조하는 방법을 제공한다. 1,2,3,3,3-펜타플루오로프로펜은 온난화 지수가 매우 낮으며 오존층 파괴능이 없는 냉매인 2,3,3,3-테트라플루오로프로펜(HFO-1234yf)의 중간생성물로서 HFP와 수소를 수소화 촉매 상에서 수소화 반응시켜 1,1,2,3,3,3-헥사플루오로프로판(HFC-236ea)을 생성하는 단계; 상기 HFC-236ea를 탈불화수소 촉매 상에서 탈불화수소 반응시켜 HFO-1225ye 제조하는 단계를 거쳐 제조한다. HFP를 수소와 기상에서 반응시켜 HFC-236ea를 제조할 때, 반응에 소비되는 수소만을 적절하게 투입함으로써 미반응 수소를 분리 및 순환시키는 공정을 없앨 수 있고, 과량의 수소에 의한 부반응을 억제시킨다. 수소화 반응에서 생성된 기체상태의 생성물(HFC-236ea)을 별도의 분리단계 없이 기상의 탈불화수소화 반응에 직접 투입하여 HFO-1225ye를 제조한다. 또한 본 발명에서는 HFP 수소화 반응의 반응열을 효율적으로 제거하고 반응온도를 제어하기 위해 HFC-236ea 탈불화수소화 반응에서 미반응한 HFC-236ea를 적정량 수소화 반응기로 순환시키는 방법을 사용한다.
Abstract:
본 발명은 유독성·부식성의 특징을 갖는 불산(HF)기체의 사용 없이, 트리플루오로아세트산 용액을 이용한 온화한 조건에서 고활성을 가진 탈불산화 촉매인 금속불소화물 촉매를 제조하는 금속불소화물 촉매 제조방법에 관한 것이며, 또한 상기 제조된 촉매를 이용하여 HFP-236ea로부터 HFO-1225ye를 고효율로 제조하기 위한 탈불산화 방법에 관한 것이다.
Abstract:
The invention relates to a palladium catalyst (Pd/C) dipped in carbon that is manufactured by using an ionic liquid and a manufacturing method thereof; and to a hydrogenation reaction of hydrofluorocarbon using the same. More specifically, as a method that dips a palladium particle in the carbon granule using the ionic liquid, after which the same is used in the hydrogenation of the hydrofluorocarbon, the size of the palladium particle is small in comparison with the existing palladium-dipped catalyst, and the shape thereof is uniformly molded so as to present high catalytic activity.
Abstract:
The present invention relates to a method for manufacturing xylenediamine using an organic solvent of amides and, more specifically, to a method for manufacturing xylenediamine via hydrogenation of phthalonitrile in an atmosphere of ammonia. High-purity xylenediamine can be manufactured in high yields even under a low temperature and low pressure reaction conditions by selectively using the organic solvent of amides which is chemically stabler than the existing reaction solvents and is economical while having excellent dissolvability of phthalonitrile.
Abstract:
The present invention relates to a method for using Cu-Zn-Mg-Al-based oxide that contains CuO, ZnO, MgO, and Al_2O_3 at a particular ratio as a reactive catalyst for synthesizing methanol from a synthetic gas and to a method for synthesizing methanol from a synthetic gas by using the catalyst.
Abstract:
PURPOSE: A manufacturing method of chlorodifluoromethane is provided to increase the yield of chlorodifluoromethane, to production amount by using a reaction at high temperature and high pressure and to prevent the caulking phenomenon of a catalyst. CONSTITUTION: A manufacturing method of chlorodifluoromethane comprises: a step of removing oxygen from a reactor containing a metal support catalyst which Pd is supported by a porous catalyst support; a step of injecting a mixture which comprises hydrogen and liquefied chlorodifluoromethane into the reactor; and a step of obtaining a reactant with chlorodifluoromethane from a supercritical fluid phase with the inner temperature of 50-300 bar and the temperature of 300-500 deg. C by a hydrodechlorination reaction; a step of cooling the reactant; and a step of collecting difluoromethane from the reactant. [Reference numerals] (AA) Yield, conversion rate(%); (BB) HCFC-22 conversion rate; (CC) HFC-23 yield; (DD) HFC-32 yield; (EE) Methane yield; (FF) Reaction time(hr)