Abstract:
본 발명의 대상은 산소, 인, 및 바나듐, 붕소 또는 알루미늄으로부터 선택되는 하나 이상의 금속을 포함하는 촉매계의 존재 하에서 글리세롤의 탈수 반응에 의한 아크롤레인의 제조 방법이다. 상기 방법은 바람직하게는 글리세롤 수용액으로부터 출발하여 산소의 존재 하에 기상에서 수행된다. 본 발명에 따른 방법은 아크롤레인을 고선택율로 수득할 수 있게 한다.
Abstract:
The present invention relates to a method of producing a catalyst or pre-catalyst suitable for assisting in the production of alkenyl alkanoates. The method includes contacting a modifier precursor to a support material to form a modified support material. One or more catalytic component precursors (palladium or gold) may be contacted to the modified support material. The atomic ratio of gold to palladium is preferably in the range of about 0.3 to about 0.90. The support materials with the catalytic component may then be reduced using a reducing environment. A composition for catalyzing the production of an alkenyl alkanoates including a modified support material with palladium and gold is also included within the invention. Catalysts of the present invention may be used to produce alkenyl alkanoates in general and vinyl acetate in particular and are useful to produce low EA/VA ratios while maintaining or improving CO2 selectivity.
Abstract:
The invention relates to a novel multimetal oxide of general formula Aga-cQbMcV12Od * e H2O (I), wherein a is a value ranging from 3 to 10, Q is an element selected from P, As, Sb and/or Bi, b is a value from 0.2 to 3, M is a metal, c is a value from 0 to 3, provided that (a-c)> 0, 1, d is a number determined according to the valence and frequency of different oxygen elements in the formula (I) and e is a value ranging from 0 to 20, wherein said oxide is embodied in the form of a crystalline structure whose powder X-ray diffractogram is characterised in that the diffraction reflex thereof for selected lattice differences is at least equal to 5 for d=7.13; 5.52; 5.14; 3.57; 3.25; 2.83; 2.79; 2.73; 2.23 and 1.71Š(Œ0,04Š). The inventive multimetal oxides are used for producing precatalysts and catalysts for a gas phase partial oxidation of aromatic hydrocarbons and are transformable by heat-treating into silver-vanadium oxide bronzes which are catalytically active components of catalysts. ® KIPO & WIPO 2007
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
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:
PURPOSE: A silver catalyst containing a promoter combination consisting of an alkali metal component, preferably cesium, together with a niobium or tantalum component, a sulfur component, and optionally a fluorine component is provided to produce ethylene oxide. CONSTITUTION: A niobium or tantalum promoted silver catalysts usually involve reaction temperatures of about 150°C. to 400°C, usually about 200°C to 300°C, and reaction pressures in the range of from 0.5 to 35 bar. Reactant feed mixtures contain 0.5 to 20% ethylene and 3 to 15% oxygen, with the balance comprising comparatively inert materials including such substances as nitrogen, carbon dioxide, methane, ethane, argon and the like. Only a portion of the ethylene usually is reacted per pass over the catalyst and after separation of the desired ethylene oxide product and the removal of appropriate purge streams and carbon dioxide to prevent uncontrolled build up of inerts and/or by-products, unreacted materials are returned to the oxidation reactor.
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