摘要:
Manufacture of highly-purfied 2-hydroxydiphenyl, wherein compounds or compound mixtures, which consist of wholly and/or partially hydrogenated 2-hydroxydiphenyl, are dehydrogenated in the vapour phase with the use of dehydrogenation catalysts containing the elements nickel, chromium, aluminium, copper and alkali metal sulphate and/or alkali metal carbonate, and wherein the resulting product mixture thus obtained is subjected to fractional distillation and the distillation residue is subsequently crystallised.
摘要:
This invention relates to catalysts for use in the oxidation of organic compounds, for example methane, ethane, propylene and carbon monoxide, as well as for the production of methane by the steam reforming of naptha and naptha distillates. The catalyst includes an inert material on which there is applied an intermediate coating of at least one oxide selected from the group consisting of the oxides of titanium, zirconium, hafnium and thorium and a final or surface coating of a mixture or alloy of platinum, rhodium and optionally a base metal in which rhodium constitutes from 1-50 weight % and the base metal, if present, constitutes from 0.01 to 25 weight % of the total metal content.
摘要:
Catalyst members of a class exemplified by La0.8K0.2MnO3 catalyze the conversion of NOx pollutants to the non-polluting materials N2O, N2, and O2. These compounds are also effective for promoting oxidation reactions such as CO to CO2.
摘要:
Olefin polymerization catalysts, formed of a silica produced employing lithium silicate, produce ethylene polymers of higher melt index than are obtained when sodium silicate is employed.
摘要:
A granulated composition comprising 5 to 50 percent of a metal oxide of Group II or of Group III of the Periodic Table, or a mixture thereof, and 10 to 40 percent by weight of a cement which is heatresistant at 500*C and above, and 10 to 85 percent by weight of alumina or a clay free from iron oxides. The adsorbent is prepared by mixing an aqueous solution of a salt of said metals with an aqueous soda or alkali solution while simultaneously depositing, with stirring, the resulting carbonates or hydroxides of said metals onto the alumina or clay. The coated filler is separated to give a paste-like mass which is mixed, with stirring with the cement and water granulated, dried at 20* to 150*C and calcined at a temperature of from 300* to 500*C. The adsorbent may be regenerated quite easily and has a high mechanical strength up to 150 kg/cm2. The use of this adsorbent for the purification of vegetable oils makes it possible to reduce by 500 times the usual adsorbent consumption, eliminate separating oils from the adsorbent by filtration, and increase by 2 to 2.5 times the service life of catalysts employed in hydrogenation of oils.
摘要翻译:包含5至50%的元素周期表II或III族金属氧化物或其混合物的颗粒组合物和10至40重量%的在500℃及以上耐热的水泥,以及 10至85重量%的氧化铝或不含氧化铁的粘土。 通过将所述金属的盐的水溶液与苏打水或碱性溶液混合制备吸附剂,同时在搅拌下将所得金属的所得碳酸盐或氢氧化物同时沉积到氧化铝或粘土上。 将涂覆的填料分离,得到糊状物质,将其与水泥和水制粒搅拌混合,在20至150℃下干燥并在300至500℃的温度下煅烧。 可以很容易地再生,机械强度高达150 kg / cm2。 使用这种吸附剂来净化植物油使得可以减少常规吸附剂消耗的500倍,通过过滤消除吸附剂中的分离油,并增加油中氢化催化剂使用寿命的2〜2.5倍 。
摘要:
Hydrocracking catalysts of improved activity comprising a Group VIB metal hydrogenation component and a crystalline aluminosilicate zeolite base are prepared by adding the Group VIB metal component to the zeolite in an aqueous acidic medium which maintains the Group VIB metal component in an essentially undissolved form. Catalysts prepared in this manner are found to display higher hydrocracking activity than conventional compositions wherein the Group VIB metal component is added to the zeolite by impregnation from an aqueous solution thereof.
摘要:
In the manufacture of an alumina catalyst support, activated alumina is admixed with a binder such as cellulose ether and a filler material such as wood flour, with sufficient water to form a thick paste, which is extruded and cut into pellets, dried, rehydrated, and finally calcined. A catalyst support is provided having a high degree of macropore content, particularly as regards the proportion of total pore volume contributed by pores larger than 3,000 angstrom units.
摘要:
1. AN ANNULAR FORM LIQUID PERVIOUS MAT OF FIBROUS MATERAIL THAT IS SUITABLE FOR THE CONTACT OF A FLUID FLOW THERETHROUGH, WHICH COMPRISES, A PLURALITY OF RECROSSING HELICALLY WOUND LAYERS OF LONG, FLEXIBLE, POROUS HIGH SURFACE AREA REFRACTORY INORGANIC OXIDE FIBER, WITH SAID FIBER HAVING BEEN PREPARED BY FORMING A NON-HOLLOW FIBER FROM A MIXTURE OF A REFRACTORY INORGANIC OXIDE SOL AND A FIBERFORMING ORGANIC POLYMER AND BY SUBSEQUENTLY CALCINING THE FIBER AT A TEMPERATURE OF FROM ABOUT 300 TO ABOUT 1000* C. TO BURN OFF THE FIBER-FORMING ORGANIC POLYMER PORTION OF THE COMPOSITE.
摘要:
1. SUPPORTED EXHAUST GAS PURIFICATION CATALYST COMPRISING AS THE ACTIVE MASS A MIXTURE OF COPPER OXIDE AND MANGANESE DIOXIDE AND AT LEAST ONE PROMOTER OXIDE OF THE ELEMENTS OF GROUP IV OR THORIUM.
摘要:
A CATALYST CONSISTING OF MANGANESE OXIDES AND LEAD OXIDES OR ONE CONSISTING OF MANGANESE OXIDES AND BISMUTH OXIDES IN SUITABLE FOR THE OXIDATION AND PURIFICATION OF EXHAUST GAS CONTAINING CARBON MONOXIDE, AND ACARALYST CONSISTING OF THE MIXTURE OF MANGANESE OXIDES AND LEAD OXIDES TOGETHER WITH METALS OF SUCH TRANSITION ELEMENTS AS COPPER, IRON, COBALT, NICKEL, ECT, OR BISMUTH OXIDES OR THE LIKE ADDED THERETO AND A CATALYST CONSISTING OF THE MIXTURE OF MANGANESE OXIDES AND BIXMUTH OXIDES TOGETHER WITH OXIDES OF SUCH ALKALINE EARTH ELEMENTS AS MAGNESIUM, CALCIUM OR BARIUM, OXIDES OF SUCH RARE EARTH ELEMENTS AS YTTRIUM LANTHANUM, CERIUM OR NEODYMIUM, OXIDES OF ALUMINUM OR SILICON, OXIDE OR SUCH TRANSITION METALS AS COPPER, IRON, COBALT OR NICKEL, OR SOME TRANSITION METALS SUCH AS COPPER, IRON,, COBALT, NICKEL, ECT. ADDED THERETO ARE MORE SUITABLE FOR THE OXIDATION AND PURIFICATION OF EXHAUST GAS CONTAINING CARBON MONOXIDE.