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Cocatalytic polymetallic oxide catalyst

A gas-phase catalytic oxidation and catalyst technology, used in metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, catalyst activation/preparation, etc.

Inactive Publication Date: 2002-05-01
ROHM & HAAS CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0040] Despite the above attempts to provide new and improved catalysts for the oxidation of alkanes to unsaturated carboxylic acids and new and improved catalysts for the ammoxidation of alkanes to unsaturated nitriles, there is a significant contribution to providing such an industrially viable process for catalytic oxidation reactions. The hurdle is identifying a catalyst that will provide sufficient conversion and suitable selectivity to provide sufficient yields of the unsaturated product

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment comparative example 1

[0139] Heat to 80°C to dissolve 150 g of water, 34.00 g of ammonium heptamolybdate tetrahydrate (Aldrich Chemical Company), 6.69 g of ammonium metavanadate (Alfa-Aesar) and 10.17 g of telluric acid (Aldrich Chemical Company) in the flask . After cooling to 20°C, an aqueous solution of 155.93 grams of niobium oxalate (Reference Metals Company) containing 15.28 mmol / gram of niobium and 3.76 grams of oxalic acid (Aldrich Chemical Company) was mixed therewith to form a solution. The water in this solution was removed by a rotary evaporator at a temperature of 50°C and a pressure of 28 mmHg to obtain a precursor solid. The solid precursor was calcined in a quartz tube. (The quartz tube was placed in an oven under an air atmosphere, the oven was heated to 275°C and held at that temperature for 1 hour; then argon was passed through (100 ml / min) the precursor material, the oven was heated to 600°C and at this temperature for 2 hours). The resulting catalyst is pressed into a mold, ...

Embodiment 3

[0147] The nominal composition is Mo 1.0 V 0.3 Te 0.23 Nb 0.08 Re 0.01 O x The catalyst was prepared by heating to 70°C to make 12.93 g of ammonium heptamolybdate tetrahydrate (Aldrich Chemical Company), 2.55 g of ammonium metavanadate (Alfa-Aesar) and 3.87 g of telluric acid (Aldrich Chemical Company) and 0.20 grams of ammonium perrhenate (Aldrich Chemical Company) was dissolved in 115 grams of water. After cooling to 40°C, 67.37 grams of niobium oxalate (H.C. Starck) in water containing 1.25% Nb to which 1.43 grams of oxalic acid (Aldrich Chemical Company) had been added were mixed to form a solution. The water in this solution was removed by rotary evaporator at a temperature of 50°C and a pressure of 28 mmHg, yielding 23 g of a precursor solid. The catalyst precursor solid was calcined in a quartz tube. (The quartz tube was placed in an oven with 100 ml / min of air through the tube, the oven was heated at 10°C / min to 275°C and held for 1 hour; then 100 ml / min of argo...

Embodiment 4

[0148] The nominal composition is Mo 1.0 V 0.3 Te 0.23 Nb 0.08 Re 0.005 O x The catalyst was prepared by heating to 70°C to make 12.93 g of ammonium heptamolybdate tetrahydrate (Aldrich Chemical Company), 2.55 g of ammonium metavanadate (Alfa-Aesar) and 3.87 g of telluric acid (Aldrich Chemical Company) and 0.10 grams of ammonium perrhenate (Aldrich Chemical Company) was dissolved in 115 grams of water. After cooling to 40°C, 67.37 grams of niobium oxalate (H.C. Starck) in water containing 1.25% Nb to which 1.43 grams of oxalic acid (Aldrich Chemical Company) had been added were mixed to form a solution. The water in this solution was removed by rotary evaporator at a temperature of 50°C and a pressure of 28 mmHg, yielding 28 g of a precursor solid. The catalyst precursor solid was calcined in a quartz tube. (The quartz tube was placed in an oven with 100 ml / min of air through the tube, the oven was heated at 10°C / min to 275°C and held for 1 hour; then 100 ml / min of arg...

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Abstract

A catalyst comprising an In promoted mixed metal oxide is useful for the vapor phase oxidation of an alkane, or a mixture of an alkane and an alkene, to an unsaturated carboxylic acid and for the vapor phase ammoxidation of an alkane, or a mixture of an alkane and an alkene, to an unsaturated nitrile.

Description

Field of Invention [0001] The present invention relates to an improved catalyst for the oxidation of alkanes or mixtures of alkanes and olefins to their corresponding unsaturated carboxylic acids by gas-phase catalytic oxidation; to a process for the preparation of the catalyst; and to the oxidation of alkanes or mixtures of alkanes and olefins A gas-phase catalytic oxidation process for conversion to their corresponding unsaturated carboxylic acids. [0002] The invention also relates to a process for the preparation of unsaturated nitriles by gas-phase catalytic oxidation of alkanes or mixtures of alkanes and alkenes in the presence of ammonia. Background of the Invention [0003] Nitriles, such as acrylonitrile and methacrylonitrile, have been produced industrially as important intermediates for the production of fibers, synthetic resins, synthetic rubbers, and the like. The most common method of preparing such nitriles is the catalytic reaction of olefi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/64B01J21/00B01J23/00B01J23/08B01J23/16B01J23/28B01J23/36B01J23/54B01J23/76B01J27/057B01J37/04B01J37/08C07B61/00C07C51/16C07C51/21C07C51/215C07C51/25C07C57/05C07C253/18C07C253/24C07C253/26C07C255/08
CPCC07C51/252B01J23/002B01J23/36C07C51/215C07C253/24B01J27/0576B01J2523/00B01J23/28B01J23/08Y02P20/52C07C57/04B01J2523/33B01J2523/55B01J2523/56B01J2523/64B01J2523/68B01J2523/74C07C255/08B01J23/64B01J23/54B01J23/76
Inventor S·查特维蒂A·M·盖夫尼S·汉E·M·维克利
Owner ROHM & HAAS CO
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