摘要:
A catalyst composition consisting essentially of the metallic elements Co, Fe, Bi, W, Mo, Si and Z in which the atomic ratio among metallic elements, Co:Fe:Bi:W:Mo:Si:Z is within the range of 2.0-20.0:0.1-10.0:0.1-10.0:0.5-10.0:2.0-11.5:0.5-15.0:0.0051.0, with the proviso that W plus Mo equals 12.0, and Z represents an alkali metal.
摘要:
Noble metal catalysts are prepared by supporting a noble metal onto a refractory porous inorganic support from an aqueous medium containing a noble metal or a compound thereof in the presence of a nonionic surface active agent of poly(oxyethylene) type having an average molecular weight of at least 500 and subjecting the so treated support to activation.
摘要:
A process is described for the manufacture of alkyl aminoalkyl acrylates of the general formula: WHEREIN R1, R2 and R3 have the same meanings as mentioned above, in the presence of the zinc or zinc compound catalyst.
USING SELECTED ZINC COMPOUNDS OR METALLIC ZINC AS A CATALYST. R1 represents hydrogen atom or alkyl group containing 1 to 8 carbon atoms, R2 represents alkyl group containing 1 to 8 carbon atoms, in case of R1 being hydrogen atom, R2 represents tertalkyl group containing 4 to 8 carbon atoms and R3 represents straight or branched alkylene group containing 2 to 4 carbon atoms. The alkyl aminoalkyl acrylates of the invention are prepared by reacting an alkyl acrylate of the general formula: CH2 CH - COOR4 wherein R4 represents alkyl group containing 1 to 4 carbon atoms with an alkyl aminoalkanol of the general formula:
摘要:
An oxidation catalyst for purifying exhaust gases of internal combustion engines comprising a monolithic multicellular chemically inert refractory support of an apparent bulk density of 0.2 to 0.7 g/cc having therein 25 to 300 gas flow channels per square inch of its cross-sectional area and supporting thereon a deposit of activated alumina and a deposit of at least one heavy metal oxide, the weight ratio of the alumina to the heavy metal oxide being 1:0.2 to 1:0.5, the total weight of the two deposits being 130 to 500 g per liter of the catalyst on the average total thickness of the two deposits being 50 to 300 microns and preparing the same.
摘要:
A PROCESS FOR THE PREPARATION OF UNSATURATED CARBONYL COMPOUNDS WHICH COMPRISES CATALYTICALLY BY OXIDIZING AN OLEFIN SELECTED FROM THE GROUP CONSISTING OF PROPYLENE AND ISOBUTYLENE IN THE VAPOR PHASE IN THE PRESENCE OF CATALYTIC OXIDE IN WHICH THE ATOMIC RATIO AMONG THE CONSTITUENT METALLIC ELEMENTS, CO:FE:BI:W:MO:SI:Z IS WITHIN THE RANGE OF 2.0-20.0:0.1-10.0:0.1-10.0:5-10.0:2.011.5:0.5-15.0:0.005-1.0, WITH THE PROVISO THAT W PLUS MO EQUALS 12.0, AND Z STANDS FOR AN ALKALI METAL.
摘要:
IN THE PROCESS FOR CONTINUOUSLY PREPARING ACRYLIC ACID ESTERS OR METHACRYLIC ACID ESTERS BY REACTING ACRYLIC ACID OR METHACRYLIC ACID WITH AN EXCESS OF EITHER METHANOL OR ETHANOL IN THE LIQUID PHASE IN THE PRESENCE OF AN ACIDIC CATALYST, THE METHOD CHARACTERIZED IN THAT THE ACRYLIC ACID OR METHACRYLIC ACID AND ALCOHOL ARE REACTED IN THE REACTION ZONE AT A MOLAR RATIO OF 1:1.2-5.0 AT A TEMPERATURE OF 40-100*C.; IN HEATING THE RESULTING REACTION PRODUCT IN AN EVAPORATING STILL TO DISTILL OFF THE ACRYLIC ACID ESTER OR METHACRYLIC ACID ESTER, WATER AND ALCOHOL, THE CONCENTRATION OF THE ACRYLIC ACID OR METHACRYLIC ACID OF THE BOTTOM LIQUID INSIDE THE EVAPORATING STILL IS MAINTAINED AT 10-40% BY WEIGHT; AND THE BOTTOM LIQUID IN AN AMOUNT OF AT LEAST 0.4 TIMES BY WEIGHT OF THE TOTAL AMOUNT OF THE ACRYLIC ACID OR METHACRYLIC ACID AND ALCOHOL FED TO THE REACTION ZONE IS RECYCLED FROM THEEVAPORATING STILL TO THE REACTION ZONE.
摘要:
PROCESS FOR THE MANUFACTURE FROM SATURATED ALIPHATIC OR ALICYCLIC HYDROCARBONS OF CORRESPONDING ALCOHOLS BY THE LIQUID PHASE OXIDATION METHOD WITH THE USE OF MOLECULAR OXYGEN-CONTAINING GAS, CHARACTERIZED IN THAT THE OXIDATION IS CARRIED OUT IN THE PRESENCE OF A CATALYST SELECTED FROM THE GROUP CONSISTING BORIC ACIDS, BORIC ACID ANHYDRIDE AND MIXTURES THEREOF, AND A PROMOTER SELECTED FROM AMMONIA, AMMONIACAL BASIC COMPOUNDS, AND COMPOUNDS WHICH GENERATE AMMONIA OR HEATING.
摘要:
A catalyst used for the purification of exhaust gases from internal combustion engine and waste gases from industrial plants is produced by dissolving an alumina sol with an inorganic acid to form an alumina sol solution, adding thereto a powdered alumina which contains at least 50 % by weight of rho alumina and is capable of forming, upon calcination, an activated alumina to form an alumina slurry, immersing in the alumina slurry a monolithic multicellular chemically inert support, while maintaining said alumina slurry at 0* to 30*C, to deposit an alumina layer on to the surface of said support, aging the alumina layer at a temperature of 50*C or below for at least 30 minutes, drying the alumina layer to form a thin alumina film on the surface of the support, impregnating the so treated support in a noble metal containing solution and activating the so impregnated support.
摘要:
A process for the preparation of unsaturated carbonyl compounds which comprises carrying out the catalytic vapor phase oxidation of an olefin selected from the group consisting of propylene and isobutylene in the presence of a catalytic oxide in which the atomic ratio among the constituent catalytic elements, Co:Fe:Bi: W:Mo:Si:Tl:Z ranges 2.0-20.0 : 0.1-10.0 : 0.1-10.0 : 0.5-10.0 : 2.0-11.5 : 0.5-15.0 : 0.005-3.0 : 0-3.0, with the proviso that W plus Mo equals 12.0, and Z stands for a metal selected from the group consisting of alakali metals and alkaline earth metals.