Abstract:
A process for the preparation of 1,2-dichloroethane by oxychlorination of ethene in the presence of a copper-containing fixed-bed catalyst comprising a bed essentially consisting of catalyst particles which comprise, at least partially, support material impregnated with an active component and, if desired, a promoter, where the catalyst bed comprises essentially no separate inert material for dilution.
Abstract:
PROBLEM TO BE SOLVED: To obtain a catechol monoether or catechol, both of which are useful as intermediates for synthesizing medicines, flavors, and seasonings, simply and economically, by reacting a specific oxygen-containing cyclohexane compound in the presence of a specific catalyst. SOLUTION: A catechol monoether shown by formula III is obtained by the reaction of (A) a compound shown by formula I (R is a 1-8C hydrocarbon group; R and R are each H or R ) or a compound shown by formula II in the presence of (B) a catalyst in which palladium (B2 ) is supported on vanadium oxide carrier (B1 ) (e.g. a catalyst which contains B2 at 0.2-5 wt.% per sum of B1 and B2 calculated as metal, whose BET surface area is 10-300 m /g, which has an average pore size of 2-100 nm and a pore volume of 0.1-1 ml/g, and which crystal transformation of B1 is monoclinic system at 60-100%) in gas phase. The catechol shown by formula IV is obtained also by the reaction in water.
Abstract:
PROBLEM TO BE SOLVED: To provide a spinel monolithic catalyst, manufacturing method therefor and a method of using it for reducing NOx in a waste combustion gas. SOLUTION: This spinel monolighic catalyst contains the spinel shown by general formula I: AxB(1-x)E2O4 (wherein all of A are Cu or half of A or less may be substituted with Co, Fe, Mn or Cr; B is at least one element selected from the group consisting of Zn, Mg, Ca, Zr, Ce, Sn, Ti, V, Mo and W; all of E are Al or half of E or less may be substituted with Fe2O3, Cr2O3, Ga2O3, La2O3 or a mixture of them; and (x) is 0-1, preferably 0-0.9). The spinel monolighic catalyst is obtained by manufacturing a particularly monolithic sintered compact by using the spinel or subsequently covering at least the surface of the sintered compact with an active composition, impregnating the obtained sintered compact with the solution containing transition elements of group V of the periodic table or adding the oxides or salts of these elements to the obtained sintered compact, drying and sintering it.
Abstract:
Carbon monoxide is removed from material streams by adsorption to an adsorption composition containing oxides of copper, zinc and zirconium, the copper-containing fraction of which has a degree of reduction, expressed as weight ratio of metallic copper to the sum of metallic copper and copper oxides, calculated as CuO, of at least 90%, and at most 97%.
Abstract:
The invention relates to a catalyst containing from 0.1 to 20 mass % rhenium and 0.05 to 10 mass % platinum in relation to the total mass thereof. The inventive method for producing a support for said catalyst consists in a) treating a support which can be eventually pre-treated with the aid of a solution of rhenium compound, b) drying and annealing said support at a temperature ranging from 80 to 600 DEG C, and c) impregnating the support with a solution of platinum compound and in drying it. The inventive method for producing alcohol by catalytic hydrogenation of carbonyl compound on said catalyst is also disclosed.
Abstract:
A process is disclosed for preparing aromatic polyamine mixtures which contain compounds of general formula (I) H2N-A-CH2-B-NH2, in which A and B stand for 1,4-phenylene radicals which can independently bear 1 to 4 substituents selected among C1-20-alkyl radicals and halogen atoms. A compound of general formula (IV) H-A-NH-CH2-HN-B-H and/or a compound of general formula (V) H-A-NH-CH2-B-NH2, in which A and B are substituted as above, are reacted at a temperature in a range from 20 °C to 200 °C in the presence of a catalyst which is made of one or several oxides of elements of the 3rd to the 10th group of the periodic table of elements and which can be acid activated.
Abstract:
Chromium-free catalyst for the low-temperature conversion of carbon monoxide and water into hydrogen and carbon dioxide, which comprises a mixed oxide of at least copper oxide, zinc oxide and aluminium oxide, with the catalyst precursor being present essentially as hydrotalcite and the content of copper oxide being not more than 20% by weight.
Abstract:
The present invention relates to a process for the alkoxylation of a monool with at least one alkoxylating agent to an alkoxylated alcohol wherein a catalyst is employed which comprises a metallo-organic framework material of metal ions and at least bidentate coordinately bound organic ligands.
Abstract:
The invention relates to a method for producing optionally akyl-substituted 1,4-butandiol by two-stage catalytic hydration in the gaseous phase of C4 dicarboxylic acids and/or the derivatives thereof with the steps of: a) introducing a gaseous flow of a C4 dicarboxylic acid or a derivative thereof at 200 to 300 °C and 2 to 60 bar in a first reactor and catalytic gas phase hydration to a mainly optionally alkyl-substituted gamma-butyrolactone containing product; b) introducing the product flow so obtained into a second reactor at a temperature of from 150 °C to 240 °C and a pressure of from 15 to 100 bar and catalytic gas phase hydration to optionally alkyl-substituted 1,4-butandiol; c) removing the desired product from the intermediates, byproducts and possibly not reacted educt; d) optionally returning non-reacted intermediates to one or both hydration stages, whereby in both hydration stages one catalyst each is used which comprises = 5 % by weight, preferably 5 to 95 % by weight, especially 20 to 90 % by weight of an oxidic carrier, the pressure prevailing in the second reactor is higher than in the first reactor, and the product mixture removed from the first reactor is introduced into the second reactor without further purifying it.
Abstract:
The invention relates to a porous organo-metallic skeleton material for accommodating at least one substance. The skeleton material contains at least one at least bidentate organic compound that is coordinatively bound to at least one metal ion, whereby the skeleton material has, at least in part, pores that contain a polymer, which is suited for adsorbing a substance. The invention also relates to a method for producing the skeleton material, to a method for accommodating at least one substance by the skeleton material, and to the use of the skeleton material, in particular, for storing, separating, controlled release or chemically converting an accommodated substance.