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Solid catalyst for propylene manufacture with propane oxo-dehydrogenation and method for producing the same

A solid catalyst, oxidative dehydrogenation technology, applied in the direction of physical/chemical process catalysts, chemical instruments and methods, organic chemistry, etc., can solve the problem of high reaction temperature

Inactive Publication Date: 2008-07-16
XIAMEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a solid catalyst for propylene oxidative dehydrogenation of propane with mild reaction conditions and good catalytic performance and its preparation method in view of the problems of high reaction temperature in existing solid catalysts

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Embodiment 1: 10.8g citric acid is made into 15ml solution, adds 10.8g Ni (NO 3 ) 2 ·6H 2 O, 60 ° C, the above solution was stirred until gelatinous. The above material was dried at 110° C. for 24 h to obtain a foamy solid. The solid was calcined at 450° C. for 4 hours to obtain nano-nickel oxide. Add nano-nickel oxide to 18ml 0.012mol / L H 3 PMo 12 o 40 Solution, continue to add 0.9ml of 0.3mol / L Cs under vigorous stirring at 60°C 2 CO 3 solution. The above suspension was evaporated to dryness at 110°C, and the obtained solid was calcined at 450°C for 4 hours to obtain a catalyst, which was ground and shaped into 30-60 mesh particles. The prepared catalyst was used in the reaction of propane oxidative dehydrogenation to propylene. The reaction conditions are: the composition of the reaction gas is C 3 h 8 :O 2 :N 2 The ratio is 2:8:40, the reaction temperature is 450°C, the amount of catalyst is 0.5g, and the space velocity is 6000ml·h -1 g -1 . Under t...

Embodiment 2

[0022] Example 2: 12g of citric acid was made into 15ml solution, and 0.9ml of 0.3mol / L Cs was added successively under vigorous stirring 2 CO 3 solution, 12g Ni(NO 3 ) 2 ·6H 2 O and 1.8ml of 0.12mol / L H 3 PMo12 o 40 solution. The above mixed solution was stirred at 60°C until gelatinous, and dried at 110°C for 24 hours to obtain a foamy solid. The solid was calcined at 450°C for 4 hours to obtain the catalyst. The above catalyst is molded into 30-60 mesh particles. The prepared catalyst is used for the reaction of propane oxidative dehydrogenation to propylene, and the reaction conditions are reaction gas composition C 3 h 8 :O 2 :N 2 The ratio is 2:8:40, the reaction temperature is 450°C, the catalyst dosage is 0.5g, and the space velocity is 6000m1·h -1 g -1 . Under the reaction conditions, the conversion rate of propane was 72.3%, the selectivity to propylene was 19.8%, and the yield of propylene was 8.2%.

Embodiment 3

[0023] Example 3: 61g of citric acid was made into 45ml solution, and 2ml of 0.3mol / L Cs was added successively under vigorous stirring 2 CO 3 solution, 18.5g Ni(NO 3 ) 2 ·6H 2 O and 4ml of 0.12mol / L H 3 PMo 12 o 40 solution. The above mixed solution was stirred at 60°C until gelatinous, and dried at 110°C for 24 hours to obtain a foamy solid. The solid was calcined at 450° C. for 4 hours to obtain the catalyst. The above catalyst is molded into 30-60 mesh particles. The prepared catalyst is used for the reaction of propane oxidative dehydrogenation to propylene, and the reaction conditions are: reaction gas composition C 3 h 8 :O 2 :N 2 The ratio is 2:8:40, the reaction temperature is 450°C, the catalyst dosage is 0.5g, and the space velocity is 6000m1·h -1 g -1 . Under the reaction conditions, the conversion of propane was 41.3%, the selectivity to propylene was 43.2%, and the yield of propylene was 17.8%.

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Abstract

The invention relates to a solid catalyst used for the preparation of propylene through the oxidation-dehydrogen of propane and a preparation method thereof, providing a solid catalyst that can create moderate reaction condition and good catalytic performance for the preparation of propylene through the oxidation-dehydrogen of propane and the preparation method of the catalyst. The catalyst comprises a main material and an additive, the main material is phosphor-molybdic heteropolyacid alkali metal salt- nickel oxide compound material or phosphor-molybdic heteropolyacid alkaline earth metal- nickel oxide compound material. The preparation method is that: citric acid is prepared into a water solution, added with an alkali metal carbonate or alkaline earth metal carbonate solution, nickel nitrated hexahydrate, and a H3PMo12O40 solution till the mixture is gelatinous, and dried to obtain a foamy solid; the foamy solid is ground, roasted and pelletized. The preparation method may also be that: citric acid is prepared into a water solution, added with nickel nitrate hexahydrate, stirred till the mixture is gelatinous, and dried to obtain a foamy solid; the foamy solid is ground and roasted to acquire a nano nickel oxide, then nano nickel oxide is added into a H3PMo12O40 solution, stirred while the alkali metal carbonate solution or alkaline earth metal carbonate solution is added, and evaporated till dryness, ground, roasted and pelletized.

Description

technical field [0001] The invention relates to a solid catalyst, in particular to a solid catalyst mainly composed of phosphorus molybdenum heteropolyacid alkali metal salt (alkaline earth metal salt)-nickel oxide composite material for the oxidative dehydrogenation of propane to produce propylene. Background technique [0002] Propylene is an important organic petrochemical-based raw material next to ethylene. It is mainly used to manufacture polypropylene. In addition, in order of consumption, propylene is also used to manufacture important chemical products such as acrylonitrile, phenol, butanol, propylene oxide and acrylic acid. . China's propylene production increase technology is in line with the international level, especially the propylene production increase technology of deep catalytic cracking units in refineries, which is already in a leading position in the world. In recent years, due to the rapid development of propylene downstream products, my country's prop...

Claims

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Application Information

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IPC IPC(8): B01J27/19B01J27/185C07C11/06C07C5/48
CPCY02P20/52
Inventor 张庆红曹传景孙淼张际哲王野万惠霖
Owner XIAMEN UNIV
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