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System and method for producing propylene by oxidative dehydrogenation of propane with chemical chain

A technology for oxidative dehydrogenation and chain propane, which is applied in chemical instruments and methods, organic chemistry, hydrocarbons, etc., can solve the problems of reducing propylene yield, increasing operating costs, unfavorable equipment safe operation, etc., and achieves the elimination of thermodynamic flatness Effect

Active Publication Date: 2019-07-30
NORTHEASTERN UNIV LIAONING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, propane is prone to excessive oxidation reaction in the presence of oxygen to generate COx (carbon monoxide and carbon dioxide), which will reduce the yield of propylene. At the same time, the presence of oxygen will increase the operating cost, which is not conducive to the safe operation of the equipment. In addition, this technology also requires expensive Air separation equipment to ensure continuous supply of oxygen

Method used

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  • System and method for producing propylene by oxidative dehydrogenation of propane with chemical chain
  • System and method for producing propylene by oxidative dehydrogenation of propane with chemical chain
  • System and method for producing propylene by oxidative dehydrogenation of propane with chemical chain

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Embodiment 1

[0033] refer to figure 1 and figure 2 , this embodiment provides a system for producing propylene by oxidative dehydrogenation of chemical chain propane, the system includes a first fixed bed 1, a second fixed bed 2, an inlet reversing valve 3, an outlet reversing valve 4, a mixed gas heat exchange Device 7, mixed gas waste heat boiler 8, mixed gas dehydration equipment 9, mixed gas separation equipment 10, COx gas storage 11, propylene storage 12, oxygen-deficient gas heat exchanger 5, oxygen-depleted gas waste heat boiler 6.

[0034] Oxygen carrier particles can be fixed in the first fixed bed 1 and the second fixed bed 2, and both the first fixed bed 1 and the second fixed bed 2 are connected with the inlet reversing valve 3 and the outlet reversing valve 4, and the inlet reversing valve 3 and the outlet reversing valve 4 are linked so that the first fixed bed 1 and the second fixed bed 2 act as dehydrogenation reactors and oxidation reactors alternately, that is, the fir...

Embodiment 2

[0081] This embodiment provides a method for producing propylene by oxidative dehydrogenation of chemical chain propane. The method adopts the system in Embodiment 1, and the inlet reversing valve 3 and the outlet reversing valve 4 are linked to make the first fixed bed 1 and the second fixed bed 1 The fixed bed 2 acts as the dehydrogenation reactor and the oxidation reactor alternately, that is, the first fixed bed 1 acts as the dehydrogenation reactor and the oxidation reactor alternately, the second fixed bed 2 acts as the dehydrogenation reactor and the oxidation reactor alternately, and at the One fixed bed 1 is used as a dehydrogenation reactor while the second fixed bed 2 is used as an oxidation reactor, and the second fixed bed 2 is used as a dehydrogenation reactor while the first fixed bed 1 is used as an oxidation reactor.

[0082] Among them, in the fixed bed as a dehydrogenation reactor, propane and oxygen carrier particles react at high temperature, and a part of ...

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Abstract

The invention relates to a system and method for preparing propylene through chemical-looping oxidative dehydrogenation of propane. The system comprises two fixed beds, two reversing valves, a gas mixture dehydration device and a gas mixture separation device, wherein the two fixed beds are communicated with the two reversing valves. According to the method, the two reversing valves are linked soas to allow the two fixed beds to be alternately used as a dehydrogenation reactor and an oxidation reactor; the fixed bed used as the dehydrogenation reactor allows oxygen carrier particles to reactwith propane at a high temperature, thereby forming a gas mixture containing propylene, water vapor and COx gas and deoxygenated oxygen carrier particles; and the fixed bed used as the oxidation reactor allows the deoxygenated oxygen carrier particles to undergo an oxidation reaction with oxygen-containing gas at high temperature, thereby producing regenerated oxygen carrier particles. The gas mixture dehydration device dries the gas mixture, and the gas mixture separation device separates propylene from the gas mixture. The system and method for preparing propylene through chemical-looping oxidative dehydrogenation of propane in the invention have the advantages of high efficiency, energy conservation, environmental protection, economic performance, safety and the like.

Description

technical field [0001] The invention relates to a system and method for preparing propylene by oxidative dehydrogenation of chemical chain propane. Background technique [0002] Propylene is the basic raw material of the three major synthetic materials and an important petrochemical raw material. In addition, propylene can also be used to produce other important chemical products such as polypropylene, acrylonitrile and acrylic acid. The current propylene production process is mainly steam cracking or catalytic cracking (FCC) of naphtha and heavy crude oil, and these two propylene production processes account for about 80% of the entire propylene production industry. However, these two propylene production processes mainly produce ethylene and refined oil, in which propylene is only produced as a by-product, so the propylene production is severely limited. In recent years, with the rapid increase in the consumption of downstream derivatives of propylene, the demand for prop...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C5/48C07C11/06
CPCC07C5/48C07C11/06
Inventor 于庆波吴天威王坤秦勤
Owner NORTHEASTERN UNIV LIAONING
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