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Propylene producing process

A technology for propylene and olefins, which is applied in the field of catalytic cracking of C4 and above olefins to produce propylene, and can solve the problems of low selectivity of target product propylene and the like

Inactive Publication Date: 2004-06-23
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is to overcome the problem of low selectivity of the target product propylene in previous literatures, and provide a new method for producing propylene, which has the characteristics of high selectivity of propylene and high yield

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Referring to document WO9935087, according to SiO 2 / Al 2 o 3 =200, prepare a slurry containing silicon, aluminum, templating agent and water, and stir at room temperature for 4 hours. Then crystallize at a temperature of 100-200°C for 20-100 hours. The ZSM-48 molecular sieve was obtained, and its X-ray diffraction data are shown in Table 1.

[0018] Patent Reported ZSM-48

[0019] W-V: weak to very strong; W-M: weak to medium; W: weak; VS: very strong

[0020] 10 grams of ZSM-48 molecular sieves washed, dried and roasted after crystallization were placed in 200 milliliters of 5% NH by weight 4 NO 3 In the solution, exchange at a temperature of 85-90°C for 2 hours, and repeat 3 times. After the exchange, the hydrogen-type ZSM-48 molecular sieve was obtained by washing and drying at 120°C. 5 grams of hydrogen-type ZSM-48 molecular sieve is added with 3 grams of 40% (weight) silica sol, and a binder is added, and extruded. After drying at 120°C and calci...

Embodiment 2～3

[0027] Changing the SiO of ZSM-48 2 / Al 2 o 3 Ratio, synthesize the former powder of ZSM-48 according to the method identical with embodiment 1, moulding, make catalyst C-2 (SiO 2 / Al 2 o 3 The molar ratio is 400) and catalyst C-3 (SiO 2 / Al 2 o 3 Molar ratio is 600), and evaluate under the same condition as embodiment 1, reaction result is as shown in table 4.

[0028] Example

Embodiment 4～7

[0030] Using the same catalyst C-1 as in Example 1, changing the reaction temperature and reaction space velocity for evaluation, the reaction results and evaluation conditions are shown in Table 5.

[0031]

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PUM

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Abstract

The present invention relates to the process of catalytically cracking C4 and above olefin to produce propylene, and aims at raising the selectivity of destination product. The present invention adopts ZSM-48 molecular sieve with SiO2 / Al2O3 molar ratio of 50-1000 as catalyst active component, and the reaction material C4 and above olefin produces cracking reaction to produce propylene under the conditions of 400-600 deg.c temperature, 0-0.15 MPa reaction pressure and 10-50 / hr to the power -1 liquid phase space velocity. The present invention may be used in the industrial production of catalytically cracking olefin to produce propylene.

Description

technical field [0001] The invention relates to a method for producing propylene, in particular to a method for producing propylene by catalytic cracking of olefins with carbon four and above. Background technique [0002] At present, in the world, there are a considerable number of C 4 and C 4 The above olefin feedstock. Affected by factors such as changes in the chemical product market and transportation costs, deep processing of these raw materials on site is a better way to utilize them. where C 4 and C 4 The conversion of the above olefins to propylene is a promising process. On the one hand, this process can utilize relatively surplus, low added value C 4 and C 4 On the other hand, the above olefin raw materials can be used to obtain propylene products with a wide range of uses. [0003] Document WO9929805 discloses a method for preparing propylene / ethylene by catalytic cracking by contacting hydrocarbon feedstock containing olefi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C4/06C07C11/06
Inventor 滕加伟赵国良宋庆英谢在库
Owner CHINA PETROLEUM & CHEM CORP