Abstract:
Surface stabilized active alumina having significantly increased thermal stability is made by incorporating 1-20%, preferably 218% by weight PO4-ion (calculated on the weight of the calcined composite) in alumina having an essentially pseudoboehmitic structure. The stabilized active alumina retains its surface area and consequently its activity for prolonged periods under high temperature exposure, for example at 900* C without material deterioration.
Abstract:
A catalyst for the preparation of anthraquinone by vapor phase oxidation of anthracene with a molecular oxygen-containing gas comprising a catalytic material supported on an inert carrier, said catalytic material comprising 100 parts by weight, calculated as titanium dioxide, of titanium, 1 to 45 parts by weight, calculated as vanadium pentoxide, of vanadium, 0.05 to 15 parts by weight, calculated as oxide thereof, of at least two metal oxides selected from the group consisting of Li2O, Na2O, K2O, Rb2O, Cs2O and Tl2O, 0 to 5 parts by weight, calculated as phosphorus pentoxide, of phosphorus and 0 to 5 parts by weight, calculated as niobium pentoxide, of niobium.
Abstract:
Novel amorphous compositions possessing catalytic properties may be prepared by controlled calcination of synthetic crystalline precursor material structurally related to the mineral jarosite, said precursor material being prepared and crystallized from an aqueous reaction mixture having a composition expressed in terms of mole ratios of oxides as
Abstract translation:具有催化性质的新型无定形组合物可以通过对结构上与矿物黄钾铁矾相关的合成结晶前体材料的可控煅烧来制备,所述前体材料由具有以氧化物摩尔比表示的组成的水性反应混合物制成并结晶,如G 2 O 。 f Fe2O3。 g L2O3。 我XO4 j H 2 O,其中G表示NH 4 +,H +,Ag +或碱金属离子或其任何混合物,其中L 2 O 3代表选自Al 2 O 3,Cr 2 O 3,V 2 O 3,La 2 O 3和 Ce2O3; XO4表示选自PO4,MoO4,VO4,SiO4和T104中的至少一种氧化物; q具有0.5至6.0的值:f具有1.5至4.0的值; g的值为0到1.0; h的值为8.0〜10.0; 我具有从零到2.0的值:j具有从100到1,000的值:f + g的和具有不超过4.0的值。
Abstract:
Supported catalysts containing alkali metal for the production of 4-methyl-1-pentene from propylene and a process for their production by heating previously dried support particles in an inert gas atmosphere for at least about 30 minutes at a temperature of at least about 150*C, mixing the support particles obtained with a compound of a transition metal that is thermally decomposable at below about 400*C and an alkali metal and heating the mixture obtained for about 1 to 120 minutes in an inert gas stream to about 150* to 500*C.
Abstract translation:含有用于从丙烯生产4-甲基-1-戊烯的碱金属的负载型催化剂及其制备方法,其通过在惰性气体气氛中在至少约150℃的温度下将预先干燥的载体颗粒加热至少约30分钟 将得到的载体颗粒与低于约400℃下可热分解的过渡金属的化合物和碱金属混合,并将惰性气流中获得的混合物加热约1至120分钟至约150°至500℃ DEG C.
Abstract:
Silica-bonded silicate particles of improved crushing strength are prepared by admixing reactive silica sols with the siliceous particles in an aqueous medium under conditions of temperature and contact time sufficient to at least partially bond the sol and silicate, contacting the resultant combination with ammonium phosphate and/or the acid phosphates of either ammonium or one or more polyvalent metals having atomic radii less than about one angstrom and drying the resultant composite.
Abstract:
ORGANIC COMPOUNDS ARE DEHYDROGENATED TO COMPOUNDS HAVING A HIGHER DEGREE IF UNSATURATION BY CONTACTING THE FEEDSTOCK IN THE VAPOR PHASE IN THE PRESENCE OF AN OXYGENCONTAINING GAS WITH A CATALYST COMPRISING AT LEAST ONE OF NICKEL, COBALT OR IRON IN ASSOCIATION WITH TIN, PHOSPHORUS AND AN ALKALI METAL. REPRESENTATIVE OF SUCH CONVERSIONS IS THE OXIDATIVE DEHYDROGENATION OF, E.G., BUTANE TO BUTENES AND BUTADIENE. THE CONVERSION PRODUCTS ARE VALUABLE COMPOUNDS PARTICULARLY USEFUL AS INTERMEDIATES FOR THE PREPARATION OF POLYMERIC MATERIALS SUCH AS SYNTHETIC RUBBERS AND THE LIKE.
Abstract:
THE PREPARATION OF AN OXIDATION CATALYST IS DESCRIBED, REPRESENTED BY THE FOLLOWING GENERAL FORMULA:
NIACOBFECBIDLEMHMOFOG
IN WHICH L IS PHOSPHOROUS, ARSENIC OR BORON AND M IS POTASSIUM, RUBIDIUM OR CESIUM; AND WHEREIN A AND B HAVE A VALUE OF FROM 0 TO 15, A+B BEING 2 TO 15, C IS 0.5 TO 7, D IS 0.1 TO 4, E IS 0 TO 4, F IS 12, G IS 35 TO 85 AND H IS 0.01 TO 0.5. THE OXIDATION CATALYST IS USEFUL IN A PROCESS TO PRODUCE ACROLEIN BY OXIDIZING PROPYLENE IN VAPOR PHASE.
Abstract:
A DIMERIZATION CATALYST SYSTEM FORMED FROM (I) A DINITROSYLIRON HALIDE AND (II) A REDUCING AGENT, IN WHICH THE REDUCING AGENT IS AN ALKALI METAL HYDRIDE, A COMPLEX HYDRIDE OF AN ALKALI METAL AND BORON OR ALUMINUM, OR AN ORGANOLALUMINUM HALIDE.
Abstract:
Highly active catalysts of molybdenum and Group VIII metals are prepared by impregnating a support with highly stable solutions of the active metal compounds and an acid of phosphorus having a P/MoO3 weight ratio of 0.1-0.25 and an initial pH of 1 to about 2.
Abstract:
UNSATURATED ACIDS IN HIGH YIELDS ALONG WITH SMALLER YIELDS OF ALDEHYDES, AS ACRYLIC ACID AND ACROLEIN OR METHACRYLIC ACID AND METHACROLEIN, ARE PREPARED IN EXCELLENT YIELDS BY THE OXIDATION OF AN OLEFIN AS PROPYLENE OR ISOBUTYLENE IN THE PRESENCE OF A CATALYST CONTAINING COBALT MOLYBDATE, TELLURIUM OXIDE AND PHOSPHOROUS OXIDE,