Abstract:
On décrit un procédé d'isomérisation d'une coupe aromatique contenant au moins un composé aromatique ayant huit atomes de carbone par molécule comprenant la mise en contact de ladite coupe avec au moins un catalyseur comprenant au moins un métal du groupe VIII de la classification périodique des éléments, au moins un support zéolithique comprenant une zéolithe choisie parmi les zéolithes de type structural EUO et MOR, prises seule ou en mélange et au moins une matrice, tel que la surface spécifique de la matrice dans le support zéolithique dudit catalyseur est comprise entre 5 et 200 m2/g.
Abstract:
The invention provides non-naturally occurring microbial organisms having a butadiene pathway. The invention additionally provides methods of using such organisms to produce butadiene. In some aspects, embodiments disclosed herein relate to a process for the production of butadiene that includes (a) culturing by fermentation in a sufficient amount of nutrients and media a non-naturally occurring microbial organism that produces crotyl alcohol; and (b) converting crotyl alcohol, produced by culturing the non-naturally occurring microbial organism, to butadiene.
Abstract:
Catalyst compositions that are effective for the conversion of methanol to light olefins (e.g. ethylene) are disclosed. The catalysts comprise a crystalline metalloaluminophosphate molecular sieve (e.g. SAPO-34) and a matrix material comprising an inorganic oxide binder and a filler, preferably a clay (e.g. kaolin). It has been discovered that by maintaining the content of the molecular sieve at 40 % or less by weight, the overall catalyst attrition resistance is markedly improved.
Abstract:
A composition comprising 2,3-butanediol is dehydrated to methyl vinyl carbinol and/or 1,3-butadiene by exposure to a catalyst comprising (a) M x O y wherein M is a rare earth metal, a group IIIA metal, Zr, or a combination thereof, and x and y are based upon an oxidation state of M, or (b) M 3 a (PO 4 ) b where M 3 is a group IA, a group IIA metal, a group IIIA metal, or a combination thereof, and a and b are based upon the oxidation state of M 3 . Embodiments of the catalyst comprising M x O y may further include M 2 , wherein M 2 is a rare earth metal, a group IIA metal, Zr, Al, or a combination thereof. In some embodiments, 2,3-butanediol is dehydrated to methyl vinyl carbinol and/or 1,3-butadiene by a catalyst comprising M x O y , and the methyl vinyl carbinol is subsequently dehydrated to 1,3-butadiene by exposure to a solid acid catalyst.
Abstract translation:包含2,3-丁二醇的组合物通过暴露于包含(a)MxOy的催化剂而脱水成甲基乙烯基甲醇和/或1,3-丁二烯,其中M是稀土金属,IIIA族金属,Zr或组合 并且x和y基于M的氧化态,或(b)M3a(PO4)b,其中M3是基团IA,IIA族金属,IIIA族金属或其组合,以及a和 b基于M3的氧化态。 包含M x O y的催化剂的实施方案可以进一步包括M2,其中M2是稀土金属,IIA族金属,Zr,Al或它们的组合。 在一些实施方案中,通过包含M x O y的催化剂将2,3-丁二醇脱水成甲基乙烯基甲醇和/或1,3-丁二烯,然后通过暴露于固体酸催化剂将甲基乙烯基甲醇脱水为1,3-丁二烯 。
Abstract:
This invention is drawn to a process for isomerizing a non-equilibrium mixture of xylenes and ethylbenzene using a catalyst comprising a zeolite, a platinum-group metal and a silica binder. A relatively minimal amount of hydrogen is supplied to the process on a once-through basis, resulting in low saturation of aromatics while achieving effective xylene isomerization with reduced processing costs.
Abstract:
A process for the isomerization of heptane preferably contained within a naphtha stream is disclosed wherein the naphtha is stripped of the butanes and the pentanes and hexanes are removed for isomerization. The heptanes and heavier are fed to a distillation column reactor containing an isomerization catalyst where the normal heptane is isomerized to mono and di branched heptane and removed as overheads. The cyclic heptanes and heavier are removed as bottoms and for feed to a catalytic reforming process.
Abstract:
The invention relates to a novel process for producing hydrocarbons, which process comprises contacting a mixture of carbon monoxide and hydrogen at elevated temperature and pressure with a catalyst comprising a Group VIII metal supported on a carrier, which Group VIII metal is present at least partly in metallic form, and which catalyst further comprises inorganic phosphate in a quantity of at least 0.05 %w, calculated as elemental phosphorus relative to the weight of the catalyst; a novel catalysts which comprises, supported on a carrier, a Group VIII metal selected from nickel, cobalt, iron and ruthenium, and a further metal selected from manganese, vanadium, zirconium and rhenium, which catalyst further comprises inorganic phosphate in a quantity of at least 0.05 %w, calculated as elemental phosphorus relative to the weight of the catalyst; and a process for preparing the novel catalyst composition.
Abstract:
The present invention relates to a process for the production of an ethylenically unsaturated carboxylic acid or ester, preferably α,ß ethylenically unsaturated carboxylic acids or esters, by the liquid phase reaction of formaldehyde or a suitable source thereof with a non-cyclic carboxylic acid ester in the presence of a basic metal salt.
Abstract:
L'invention concerne un procédé de préparation d'une oléfine, d'un diène ou d'un polyène, par conversion catalytique d'au moins un alcool possédant une chaîne carbonée d'au moins trois atomes de carbone et différent du propan-2-ol, en présence d'au moins un catalyseur à base de phosphate d'un métal ou de plusieurs métaux M, M étant choisi parmi les 15 lanthanides (lanthane, cérium, praséodyme, néodyme, prométhium, samarium, europium, gadolinium, terbium, dysprosium, holmium, erbium, thulium, ytterbium, lutécium), l'yttrium, le scandium et le bore, et les applications de ce procédé.