Abstract:
A catalyst composition and its use for the selective oxidation of ethane to acetic acid and/or for the selective oxidation of ethylene to acetic acid which composition comprises in combination with oxygen the elements molybdenum, vanadium, niobium, gold in the absence of palladium according to the empirical formula: MoaWbAuc VdNbeZf wherein Z is one or more elements selected from the group consisting of B, A1, Ga, In, Ge, Sn, Pb, Sb, Cu, Pt, Ag, Fe and Re; a, b, c, d, e and f represent the gram atom ratios of the elements such that: 0
Abstract:
This invention relates to an improved process for preparing silver catalysts useful for the vapor phase production of ethylene oxide from ethylene and oxygen. An inert support is impregnated with a solution of a catalytically effective amount of a silver containing compound, a promoting amount of an alkali metal containing compound, and a promoting amount of a transition metal containing compound. The impregnated support is calcined by heating at a temperature of from about 200°C to about 600°C to convert the silver in the silver containing compound to metallic silver and to decompose and remove substantially all organic materials. The heating is conducted under an atmosphere comprising a combination of an inert gas and from about 10 ppm to about 5% by volume of a gas of an oxygen containing oxidizing component.
Abstract:
본 발명은 에틸렌 및 산소로부터 산화에틸렌의 증기상 제조에 유용한 은 촉매의 개선된 제조 방법에 관한 것이다. 불활성 지지체를 촉매적으로 효율적인 양의 은 함유 화합물, 촉진량의 알칼리 금속 함유 화합물 및 촉진량의 전이 금속 함유 화합물을 포함하는 용액에 침지시킨다. 상기 침지된 지지체를 약 200℃ 내지 약 600℃의 온도에서, 상기 은 함유 화합물 중의 은이 금속성 은으로 전환되고 사실상 모든 유기 물질이 분해 및 제거되기에 충분한 시간 동안 가열하여 하소시킨다. 상기 가열은 불활성 기체 및 약 10 부피 ppm 내지 약 5 부피%의 산소 함유 산화 성분 기체의 조성을 함유하는 대기하에 행해진다.
Abstract:
A process for preparing a catalyst comprising silver on a support, which process comprises - depositing silver on the support, and - depositing on the support a base having a pKb of at most 3.5 when measured in water at 25 ‹C, in a quantity of at least 50 mmole per kg of the support, simultaneously with or later than depositing silver on the support; the catalyst; and a process for preparing an olefin oxide by reacting an olefin with oxygen in the presence of the catalyst. ® KIPO & WIPO 2007
Ag ab M b V 2 O x *c H 2 O 상기 식에서 M은 Li, Na, K, Rb, Cs, Tl, Mg, Ca, Sr, Ba, Cu, Zn, Co, Pb, Cr, Au, Al, Fe, Co, Ni 및/또는 Mo로 구성되는 군으로부터 선택되는 금속이고, a는 0.3 내지 1.9이고, b는 0 내지 0.5인데, 단 a - b ≥ 0.1이고, c는 0 내지 20이고, x는 화학식 I에서 산소 이외의 원소들의 원자가 및 양에 의해서 화학양론적으로 결정되는 수이고, 또한 상기 화학식의 다중금속 산화물은 결정 구조를 가지고 있고 그 결정 구조는 하기의 격자 간격 d에서 반사를 나타내는 X-선 분말 회절 패턴을 나타낸다: 15.23 ± 0.6, 12.16 ± 0.4, 10.68 ± 0.3, 3.41 ± 0.04, 3.09 ± 0.04, 3.02 ± 0.04, 2.36 ± 0.04 그리고, 1.80 ± 0.04 Å. 방향족 탄화수소의 부분 산화를 위한 전촉매들 및 그로부터 제조되는 촉매들이 또한 제공된다. 다중금속 산화물, 은-바나듐 산화물, 전촉매, 카르복실산, 방향족 탄화수소.
Abstract:
A process for production of a supported catalyst that, when used for production of lower aliphatic carboxylic acids from oxygen and lower olefins, improves yields of the lower aliphatic carboxylic acids and minimizes production of carbon dioxide gas (CO2) by-product compared to the prior art. A compound comprising at least one element selected from elements of Groups 8, 9 and 10 of the Periodic Table, at least one chloride of an element selected from copper, silver and zinc, and a chloroauric acid salt, are loaded on a carrier, after which there are further loaded a compound comprising at least one element selected from gallium, indium, thallium, germanium, tin, lead, phosphorus, arsenic, antimony, bismuth, sulfur, selenium, tellurium and polonium, and a heteropoly acid. ® KIPO & WIPO 2009
Abstract:
A reactor system for the epoxidation of ethylene, which reactor system comprises an elongated tube having an internal tube diameter of more than 40 mm, wherein contained is a catalyst bed of catalyst particles comprising silver and a promoter component deposited on a carrier, which promoter component comprises an element selected from rhenium, tungsten, molybdenum and chromium; a process for the epoxidation of ethylene comprising reacting ethylene with oxygen in the presence of the catalyst bed contained in the reactor system; and a method of preparing ethylene glycol, an ethylene glycol ether or an ethanol amine comprising obtaining ethylene oxide by the process for the epoxidation of ethylene, and converting the ethylene oxide into ethylene glycol, the ethylene glycol ether, or the ethanol amine. Preferably, the internal tube diameter is at least 45 mm.
Abstract:
A high activity and high selectivity silver catalyst comprising silver and, optionally, one or more promoters supported on a suitable support material having the form of a shaped agglomerate. The structure of the shaped agglomerate is that of a hollow cylinder having a relatively small inside (bore) diameter. The catalyst is made by providing the shaped material of a particular geometry and incorporating the catalytic components therein. The catalyst is useful in the epoxidation of ethylene.
Abstract:
본 발명은 에탄의 아세트산으로의 선택적 산화용 및/또는 에틸렌의 아세트산으로의 선택적 산화용 촉매 조성물 및 그의 용도에 관한 것으로서, 상기 조성물은, 하기 화학식에 따라 팔라듐의 부재 하에서 몰리브덴, 바나듐, 니오븀, 금 원소들을 산소와 조합하여 함유한다: Mo a W b Au c V d Nb e Z f [식 중, Z는 B, Al, Ga, In, Ge, Sn, Pb, Sb, Cu, Pt, Ag, Fe 및 Re으로 이루어진 군에서 선택되는 하나 이상의 원소이고; a, b, c, d, e 및 f는, 하기를 따르는, 상기 원소들의 그램 원자비를 나타낸다: 0 -5