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A kind of oxygen carrier preparation method for propane chemical chain dehydrogenation to propylene

A chemical chain, oxygen carrier technology, applied in chemical instruments and methods, organic chemistry, metal/metal oxide/metal hydroxide catalysts, etc. High temperature carbon deposition inactivation and other problems, to achieve the effect of increasing wear resistance, high dehydrogenation activity, and high propylene selectivity

Active Publication Date: 2019-12-03
QINGDAO UNIV OF SCI & TECH
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

The above-mentioned patents all use the impregnation method to load the Pt-Sn catalyst on the carrier, the catalyst is prone to high-temperature carbon deposition and deactivation, the catalyst recycling rate is low during the reaction process, and the reactivity of the catalyst after circulation is also low

Method used

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  • A kind of oxygen carrier preparation method for propane chemical chain dehydrogenation to propylene
  • A kind of oxygen carrier preparation method for propane chemical chain dehydrogenation to propylene
  • A kind of oxygen carrier preparation method for propane chemical chain dehydrogenation to propylene

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Embodiment 1

[0029] The specific process of preparing the manganese-based oxygen carrier with core-shell structure in this embodiment is as follows:

[0030] (1) Preparation of alumina carrier: screen 500g of alumina particles with a particle size of 100-500 μm, add 3-5g of scallop powder, mix well, add 100ml of 2% nitric acid aqueous solution dropwise, and place in a 100°C refrigerator after fully mixing After drying in an oven for 48 hours, calcining in a muffle furnace at 500-600°C to obtain alumina carrier particles;

[0031] (2) Preparation of manganese-containing alumina carrier: get 200 g of alumina carrier particles obtained in step (1), immerse in 500 ml of manganese nitrate deionized aqueous solution with a mass fraction of 50%, obtain the impregnated carrier after 24 hours of immersion, and then drying the impregnated particles at 90-120°C for 48 hours, and calcining at 650°C for 3-5 hours to obtain the manganese-containing alumina carrier;

[0032] (3) Preparation of manganese...

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Abstract

The invention belongs to the technical field of oxygen carrier preparation, and relates to an oxygen carrier preparation method for chemical chain dehydrogenation of propane to produce propylene. The alumina oxygen carrier is first obtained by impregnating alumina into a manganese-containing precursor aqueous solution, and then Load a certain amount of manganese-based active component; then add clay and binder to the oxygen carrier to increase the wear resistance of the oxygen carrier; at the same time, load the lithium oxide active component onto the carrier, and then obtain Oxygen carrier particles used for chemical chain dehydrogenation of propane to produce propylene; its preparation method is simple, and the oxygen carrier will not cause environmental pollution during the preparation and recycling regeneration process; the prepared oxygen carrier has high dehydrogenation efficiency Activity, higher propane conversion, higher propylene selectivity.

Description

Technical field: [0001] The invention belongs to the technical field of oxygen carrier preparation, and relates to a method for preparing an oxygen carrier for propane chemical chain dehydrogenation to produce propylene. Background technique: [0002] At present, most of the low-carbon alkanes produced in China are directly used as fuel, and their utilization value needs to be improved, especially the supply of propylene is in short supply. Therefore, research on the dehydrogenation of low-carbon alkanes to olefins can realize the rational utilization of natural gas. In 2015, the domestic demand for propylene is expected to be more than 30.14 million tons, while the annual domestic propylene output in 2015 was only 22.45 million tons, which is far below the demand. In order to meet the huge demand for propylene, new propane production has been widely carried out Technology research and development work. The propane dehydrogenation processes that have been industrialized no...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/34C07C5/48C07C11/06
CPCC07C5/48B01J23/34C07C2523/34B01J35/397C07C11/06Y02P20/52
Inventor 郭庆杰左成吴曼张秀丽
Owner QINGDAO UNIV OF SCI & TECH
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