Abstract:
Disclosed is a method of preparing a calcium phosphate catalyst, which comprises reacting a calcium salt with a phosphoric acid salt in aqueous ammonia, separating the precipitate resulting from the reaction mixture thus obtained, suitably shaping said precipitate, drying it, and subjecting it to heat treatment within a temperature range of 450.degree. to 600.degree. C. in the presence of steam mixed with at least one of the components selected from the group consisting of an inert gas, air, phosphoric an acid, aldehyde, an oxygen-containing heterocyclic compound, an alcohol, and a diene hydrocarbon.The reaction of calcium salts with phosphoric acid salts in aqueous ammonia is effected with the starting reactants taken in the molar ratio of 1.5:1 if no phosphoric acid treatment is used, or with the starting reactants in a molar ratio within the range of 1.5:1 to 5.0:1 if the reaction mixture is treated with a phosphoric acid solution to a pH of from 5.0 to 7.0.
Abstract:
Catalysts are provided which are useful in the oxidation of olefins to aldehydes and conjugated dienes and in ammoxidation of olefins to nitriles. The catalysts comprise the combined oxides of uranium and arsenic on a catalyst support and the combined oxides of uranium and arsenic promoted by molybdenum, boron, vanadium, tin, nickel, bismuth, chromium, iron, manganese, zinc, tungsten, antimony, cerium, cobalt or rhenium.
Abstract:
1. A COMPOSITION OF MATTER CONSISTING ESSENTIALLY OF A CALCINED ADMIXTURE OF (I) COBALT OXIDE, COMPOUND OF COBALT CONVERTIBLE TO THE OXIDE ON DRYING OF CALCINING, OR THE SULFATE, (II) TIN OXIDE, COMPOUND OF TIN CONVERTIBLE TO THE OXIDE ON DRYING OR CALCINATION, OR SULFATE, AND (III) A GROUP IIA METAL OXIDE, COMPOUND CONVERTIBLE TO A GROUP IIA OXIDE ON CALCINATION, OR SULFATE, SUCH THAT IN SAID CALCINED COMPOSITION OF MATTER COBALT REPRESENTS ABOUT 10 TO 75 WEIGHT PERCENT, TIN REPRESENTS ABOUT 1 TO 50 WEIGHT PERCENT, AND GROUP IIA METAL REPRESENTS ABOUT 0.5 TO 60 WEIGHT PERCENT. 4. THE CATALYST COMPOSITION ACCORDING TO CLAIM 1 WHEREIN FURTHER IS INCLUDED IN SAID CATALYST COMPOSITION A SUPPORT, AND SAID SUPPORT IS ONE OR MORE OF SILICA, BORIA, TITANIA, AND ZIRCO-NIA.
Abstract:
Compositions prepared from (I) a transition metal compound of the iron group, (II) a Group IIA metal-containing compound, and (III) Group VIA element-containing compound, are effective in a process to convert paraffins or monoolefins to a greater degree of unsaturation.
Abstract:
The activity of tin-phosphorus oxidative dehydrogenation catalysts is significantly improved by including a heat-volatile activity-stimulating ammonium salt in the catalyst composition prior to the catalyst particle-forming stage.
Abstract:
Certain crystalline aluminum borate catalyst supports containing about 8-25 weight-percent of B2O3 are found to provide unusually stable and active catalysts for high-temperature chemical conversions, particularly exhaust gas conversion, when prepared by precalcining shaped composites of alumina and boria at temperatures between about 1,250* and 2,600*F., prior to the addition thereto of active metal or metals. Calcination at below 1,250*F. is found to yield amorphous catalysts of inferior activity, while at temperatures above 2,600*F. drastic reductions in surface area may occur.
Abstract translation:发现含有约8-25重量%的B 2 O 3的某些结晶硼酸铝催化剂载体在通过在氧化铝和氧化硼的成形复合材料中预煅烧制备时,提供用于高温化学转化,特别是废气转化的异常稳定和活性的催化剂, 约1,250°和2600°F,然后加入活性金属或金属。 发现在低于1250°F的煅烧产生的活性较差的无定形催化剂,而在2600°F以上的温度下,可能会发生大幅度的表面积的减少。
Abstract:
1. AN AQUEOUS HOMOGENEOUS SOLUTION CONSISTING ESSENTIALLY OF (A) A WATER-SOLULBE PALLADIUM (II) SALT, SAID SALT BEING SELECTED FROM THE GROUP CONSISTING OF A CHLORIDE, BROMIDDE, NITRATE, SULFATE, AND LI2PDCL4, HAVING A CONCENTRATION OF METAL ION OF AT LEAST ABOUT 0.00005 TO ABOUT 0.025 MOLE PER LITER, (B) COPPER (ii) CHLORIDE OR BROMIDE, (C) A COPPER (II) SALT SELECTED FROM THE GROUP CONSISTING OF A NITRATE, SULFATE, ALKYLSULFONATE, ARYLSUFONATE, TETRAFLUOROBORATE, PERCHLORATE, TRIFLUOROACETATE, TRICHLOROACETATE AND METHANEPHOSPHONATE, AND (D) THE BALANCE WATER, WHEREIN THE TOTAL CONCENTRATION OF (B) AND (C) IS FROM ABOUT 0.003 TO ABOUT 3 MOLES PER LITER, AND WHEREIN THE COPPER (II) CHLORIDE OR BROMIDE (B) COMPRISES FROM ABOUT 10 TO ABOUT 80 MOLE PERCENT OF THE TOTAL OF (B) AND (C).
Abstract:
A CATALYST USEFUL FOR THE OXIDATION OF ORGANIC COMPOUNDS, PARTICULARYL VAPOR-PHASE OXIDATION OF BENZENE WITH MOLECULAR OXYGEN TO PRODUCE MALEIC ANHDRIDE, COMPRISES THE OXIDES OF MOLYBDENUM, VANADIUM, PHOSPHORUS, SODIUM AND BOORON IN COMBINATION WITH AN OXIDE OF AT LEAST ONE METAL OF THE GROUP CONSISTING OF MANGANESE, TIN, TUNGSTEN AND BISMUTH, AND PREFERABLY ALSO IN COMBINATION WITH AN OXIDE OF AT LEAST ONE MEMBER OF THE GROUP CONSISTING OF IRON, COBALT AND NICKEL.
Abstract:
AN IMPROVED OXIDATIVE DEHYDROGENATION CATALYST COMPRISING A LITHIUM-TIN-PHOSPHORUS-OXYGEN COMPOSITION IS DISCLOSED. ALSO IS A METHOD OF REACTIVATING A COMPOSITION OF A SIMILAR NATURE. THE IMPROVED CATALYST AND THE REACTIVATED CATALYST, BOTH ARE FORMED BY PROCEDURES INVOLVING PHOSPHORUS DEPOSITION.