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Method for dehydrogenating low-carbon alkane by using metal oxide

A low-carbon alkane, oxidative dehydrogenation technology, applied in chemical instruments and methods, hydrocarbons, hydrocarbons, etc., can solve problems such as difficult industrial promotion, hidden safety hazards, etc., and achieve improved reaction conversion rate and complete heat matching. , to achieve the effect of heat matching

Inactive Publication Date: 2018-08-17
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the mixing of oxygen and flammable reaction gases has potential safety hazards, which imposes strict requirements on the design and operation of the reactor, making industrial promotion difficult.

Method used

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  • Method for dehydrogenating low-carbon alkane by using metal oxide
  • Method for dehydrogenating low-carbon alkane by using metal oxide
  • Method for dehydrogenating low-carbon alkane by using metal oxide

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Embodiment Construction

[0025] The technical solutions of the present invention will be further described below in conjunction with specific embodiments.

[0026] Take the oxide of metal vanadium as an example to prepare (each part by mass is 1g), impregnate the carrier into a solution containing metal ions, and then calcine

[0027] Step 1, get 1.8g ammonium metavanadate (NH 4 VO 3 ) and 2.8g oxalic acid (C 2 o 4 h 2 ) was dissolved in 3g deionized water, after the reaction was complete, 2.0gAl 2 o 3 Soak in the above solution, dry at room temperature for 12 hours, and dry at 80°C for 2 hours;

[0028] Step 2, calcining the solid obtained in (1) at 600°C for 2h to obtain VO x / Al 2 o 3 Catalyst (i.e. aluminum oxide loaded with vanadium pentoxide in a high oxidation state);

[0029] Step 3, put VO x / Al 2 o 3 Catalyst powder catalyst tablet molding to make a granular catalyst with a size of 20-40 mesh;

[0030] Step 4, weigh 0.5g of the above-mentioned catalyst and pack it into a fixed-...

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Abstract

The invention discloses a method for dehydrogenating low-carbon alkane by using a metal oxide. According to the method, a metal oxide is used as an oxygen carrier, the metal oxide as a catalyst and low-carbon alkane are subjected to an oxidation dehydrogenation reaction under an anaerobic condition, and the lattice oxygen of the metal oxide and the oxidation dehydrogenation reaction product hydrogen are combined so as to promote the performing of the reaction; the product hydrogen or the intermediate hydrogen and the active lattice oxygen are combined to form water, such that the reaction equilibrium can be effectively pulled to move rightward so as to improve the conversion rate and the product yield of the reaction; and the direct use of oxygen in the oxidation dehydrogenation process isavoided, and the oxygen can be regenerated by reacting with air to supplement the lattice oxygen, such that the circulation is achieved.

Description

technical field [0001] The invention belongs to the technical field of dehydrogenation of low-carbon alkane, and more specifically relates to a method for dehydrogenating low-carbon alkane by using metal oxides. Background technique [0002] Low-carbon olefins and dienes (less than 4 carbons) are important chemical raw materials, and are widely used in many important chemical routes such as synthetic resins, plastics, and gasoline blending components. The preparation of low-carbon olefins is mainly obtained through steam cracking of hydrocarbons, catalytic cracking of olefins, catalytic cracking of heavy oil and pyrolysis of heavy oil. In recent years, the corresponding alkanes (ethane, propane, isobutane, etc.) The reaction to obtain corresponding olefins has been greatly developed and has become a new type of low-carbon olefins preparation technology, as shown in the following reaction equation: [0003] C n h 2n+2 =C n h 2n +H 2 [0004] Catalytic dehydrogenation o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C11/06C07C5/48B01J23/22
CPCY02P20/52Y02P20/584C07C5/48B01J23/22C07C2523/22C07C11/06
Inventor 巩金龙曾亮伍腾芳喻俊杰陈赛
Owner TIANJIN UNIV
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