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Catalytic reactor for preparing propylene from methanol and method for preparing propylene from methanol

A methanol-to-propylene, catalytic reactor technology, applied in chemical instruments and methods, organic chemistry, chemical/physical processes, etc., can solve the problems of high methanol consumption per ton of propylene, decreased catalyst activity, and increased average unit consumption, etc. The effect of reducing the unit consumption of propylene and methanol, increasing the production time, and reducing the content of alkane and ethylene

Active Publication Date: 2020-12-18
DATANG INT CHEM TECH RESINST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The operation of the catalyst in the whole life process is roughly divided into three stages: (1) Induction period, the one-way life is longer, the catalyst activity is higher in this stage, and more alkanes and ethylene are mainly produced, resulting in high unit consumption per ton of propylene methanol at this stage; (2) In the stable period, the one-way life is about moderate. At this stage, the catalyst activity is moderate, more propylene is produced, and the average unit consumption is the lowest. (3) The attenuation and deactivation period is short in one-way life. At this stage, the catalyst activity decreases and more aromatics are produced. Average unit consumption rises

Method used

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  • Catalytic reactor for preparing propylene from methanol and method for preparing propylene from methanol
  • Catalytic reactor for preparing propylene from methanol and method for preparing propylene from methanol

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The catalyst packed in combination in this example is used for producing propylene from methanol. Specifically, the following steps are included:

[0029] (1) Extra-device deactivation treatment

[0030] Weigh 1000g of commercial MTP catalyst HZSM-5 (produced by Shanghai Zhuoyue Environmental Protection New Material Co., Ltd., φ3.2×3.3mm, bulk density is 0.79g / mL), and put it into a quartz tube reactor. At 480°C, using 100% water vapor, at a space velocity of 2h -1 Under the condition of 48 hours, stop feeding water vapor, cool down to room temperature naturally, and obtain the precursor of water vapor treatment.

[0031] Put the above precursor into a U-shaped reaction tube, put it into a water bath at 80°C, pass through HCl solution with a concentration of 2mol / L, treat it for 6 hours, then wash it with deionized water three times, and then dry it at 120°C for 8 hours , and calcined at 550° C. for 6 hours to obtain an ex-situ deactivation-treated catalyst.

[0032...

Embodiment 2

[0035] In the external deactivation treatment, the water vapor treatment conditions are: temperature 500°C, 100% water vapor, space velocity 1h -1 , processing time is 36 hours. The acid treatment conditions are: the concentration of HCl is 5 mol / L, and the treatment is at 100° C. for 4 hours. The other steps are the same as in Example 1, the ratio of the height of the deactivated catalyst to the fresh catalyst is 1:1, and the total loading amount of the catalyst is 200g, which is ready for evaluation.

Embodiment 3

[0037] The external deactivation treatment of the catalyst is the same as that in Example 1. When combined loading, the lower layer is fresh catalyst, and the upper layer is the catalyst with external deactivation treatment. The height ratio of the upper and lower catalyst layers is 1:2. It is 200g, and it is ready for evaluation.

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Abstract

The invention provides a catalytic reactor for preparing propylene from methanol, which comprises a catalyst bed layer, and the catalyst bed layer comprises an out-of-vessel deactivated catalyst layerand a fresh catalyst layer, the out-of-vessel deactivated catalyst layer and fresh catalyst layer are provided such that the reaction feedstock first contacts the out-of-vessel deactivated catalyst and then contacts the fresh catalyst. The invention also provides a method for preparing propylene from methanol. The method comprises a step of using the catalytic reactor for preparing propylene frommethanol. Through the catalytic reactor and the method for preparing propylene from methanol, the unit consumption of per ton of propylene and methanol in the whole life cycle of the catalyst can beeffectively reduced.

Description

technical field [0001] The invention belongs to the technical field of chemical industry. In particular, the present invention relates to a catalytic reactor for methanol to propylene and a method for methanol to propylene. Background technique [0002] Propylene is one of the basic chemical raw materials, used to produce a variety of important organic chemical raw materials, such as acrylonitrile, propylene oxide, cumene, epichlorohydrin, isopropanol, glycerol, acetone, butanol, octanol , acrolein, acrylic acid, acrylic alcohol, acetone, glycerin, polypropylene, etc. In my country, the process of producing methanol from coal and converting methanol to propylene (MTP) is an important non-petroleum route to produce propylene. Among them, the fixed-bed MTP process has the advantages of simple process, high propylene yield, and low reactor wear. Three sets of industrial demonstration plants have been constructed and operated in China. [0003] The fixed-bed MTP process uses ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J8/04C07C1/20C07C11/06
CPCB01J8/0446C07C1/20B01J2208/00805B01J2208/025C07C11/06
Inventor 陈爱平赵宗凯陈元应孔凡贵梅长松李春启
Owner DATANG INT CHEM TECH RESINST
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