摘要:
A catalytic oxide, particularly adapted for the preparation of unsaturated carbonyl compounds through the catalytic vapor phase oxidation of olefins, wherein the atomic ratio among the constituent 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 : 0-15.0 : 0.005-1.0, with the proviso that W plus Mo equals 12.0, and Z represents an alkaline earth metal.
摘要:
A catalytic oxide particularly adapted for the preparation of acrylic acid through the catalytic oxidation of acrolein in the vapor phase with molecular oxygen, the catalytic oxide comprising one in which the atomic ratio of the constitutional metal elements is within the following range:
摘要翻译:一种催化氧化物,特别适于通过在气相中与分子氧催化氧化丙烯醛来制备丙烯酸,催化氧化物包括其中构成金属元素的原子比在下列范围内的催化氧化物:VaMobWcCrdCue其中14 < A = 24,B = 12,4 C <20,1 D <10 AND 0 = E <12。
摘要:
A process for recovering ammonia gas from an aqueous solution containing ammonia and carbon dioxide which comprises countercurrently contacting such aqueous solution with a desorption gas selected from air, oxygen, nitrogen and mixtures thereof. The molar ratio of ammonia to carbon dioxide in the aqueous solution is at least 2, such aqueous solution being one obtained upon the synthesis of urea from ammonia and carbon dioxide or from the production of an aromatic nitrile by the ammoxidation of an aromatic hydrocarbon.
摘要:
A catalyst for the preparation of phthalic anhydride by vapor phase catalytic oxidation of either ortho-xylene or naphthalene with a molecular oxygen-containing gas which comprises a catalytically active substance supported on a porous inert carrier, said catalytically active substance comprising 1 to 20 parts by weight of V2O5 and, correspondingly, 99 to 80 parts by weight of TiO2 and, based on the total weight of the V2O5 and TiO2, 0.02 to 5.0 % by weight of Nb2O5, 0.1 to 5.0 % by weight of P2O5, 0 to 0.25 % by weight of K2O and 0 to 0.5% by weight of Cs2O, the total weight of K2O and Cs2O being at least 0.05 % by weight and optionally 0 to 5.0 % by weight of at least one member selected from the group consisting of rare earth elements, ZnO and Tl2O.
摘要:
A process for producing unsaturated carboxylic acids, which comprises oxidizing unsaturated aldehydes in the vapor phase in the presence of a catalyst comprising a catalytic oxide supported on an inert carrier, such catalytic oxide containing metal elements in the atomic ratio Mo:V:Cu:Cr:W of 12:2-14:1-6:0-4:0-12 with the proviso that Cr + W is not 0.
摘要:
A PROCESS FOR PREPARATION OF MONOSULPHONIC ACIDS AT HIGH SELECTIVITY WHICH COMPRISES REACTING STRAIGHT-CHAIN PARAFFINIC HYDROCARBONS HAVING 10 TO 30 CARBON ATOMS WITH SULPHUR DIOXIDE AND OXYGEN TO PRODUCE THE CORRESPONDING SULPHONIC ACIDS, CHARACTERISED IN THAT THE REACTION IS CARRIED OUT UNDER SUCH CONDITIONS AS TO BRING ABOUT A HOMOGENEOUS REACTION LIQUID PHASE, I.E., THE CONCENTRATION OF SULPHUR DIOXIDE IN THE REACTION LIQUID PHASE BEING 7 TO 23% BY WEIGHT, THE REACTION TEMPERATURE BEING 17 TO 37*C., AND THE CONVERSION OF THE STRAIGHT-CHAIN PARAFFINIC HYDROCARBON BEING 1 TO 7%.