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Method for preparing propylene by butylene-containing C4 fractioning hydrocarbon dismutation

A C4 fraction and butene technology, applied in the field of C4 fraction hydrocarbon disproportionation to propylene, can solve the problems of poor catalyst stability and high raw material composition requirements

Active Publication Date: 2010-05-12
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is the problem of high raw material composition requirements and poor catalyst stability existing in the prior art, and a new method for producing propylene by disproportionation of C4 fraction hydrocarbons containing butene is provided

Method used

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  • Method for preparing propylene by butylene-containing C4 fractioning hydrocarbon dismutation
  • Method for preparing propylene by butylene-containing C4 fractioning hydrocarbon dismutation
  • Method for preparing propylene by butylene-containing C4 fractioning hydrocarbon dismutation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Take 4 grams of prepared MgO and 1 gram of WO 3 / SiO 2 Catalyst, wherein the specific surface area of ​​MgO is 126.2 m 2 / gram, after mixing, put it into the constant temperature section of a reactor with a length of 110 centimeters and an internal diameter of 2.5 centimeters, and fill it with glass balls up and down. The catalyst bed is activated by the following method before feeding: feed air at a rate of 6 liters / hour, gradually heat up to 550°C, and keep at this temperature for 4 hours, then switch the air to nitrogen and keep the temperature for 8 hours, Lower the temperature to 300°C, raise the pressure to 3.0MPa with nitrogen, and stop feeding nitrogen. After the activation is completed, the molar ratio of butene and ethylene contained in the carbon four cut hydrocarbons is 1:2 to feed the carbon four cut hydrocarbons and polymer grade ethylene, and the weight space velocity in terms of butene is 1.2 hours -1 . The C4 distillate hydrocarbons are first purif...

Embodiment 2

[0022] According to the conditions and methods of Example 1, the C4 cut hydrocarbons are fixed as raw material B. a) Only change MgO and WO in the catalyst 3 / SiO 2 The weight ratio, the evaluation results are shown in Table 3; b) Only the type of alkaline earth metal in the catalyst is changed, and CaO is used instead of MgO, and the evaluation results are shown in Table 4.

[0023] The reaction result on the catalyst with different weight composition in table 3

[0024]

[0025] Table 4 Reaction results on different component catalysts

[0026]

Embodiment 3

[0028] According to the conditions and methods of Example 1, the C4 cut hydrocarbons were fixed as raw material B, and only the specific surface area of ​​MgO was changed. The results are shown in Table 5.

[0029] The reaction result of magnesium oxide containing different specific surface areas in the catalyst of table 5

[0030]

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Abstract

The present invention relates to a method for producing propylene using C4 fractioning hydrocarbon divergent mode. The method is to overcome the shortcoming in the prior technology that: the requirement to the raw material in the method for producing propylene using butylene and ethylene divergent mode is much higher and the stability of the catalyzer is much less. The method uses C4 fractioning hydrocarbon including butylene and ethylene as the raw material; the material is contacted with the catalyzer including alkaline-earth metals oxide and transition metals oxide and then takes the divergent reaction with the catalyzer to produce propylene; the molar ratio between the alkaline-earth metals oxide and transition metals oxide is 1-20:1; the molar ratio between the butylene and ethylene in C4 fractioning hydrocarbon is 0.2-1:1; thereinto, the surface area of the lkaline-earth metals oxide is 100-500m2 per gram; the method can solve the problem greatly, which can be uses in the industrial production for producing propylene using olefin divergent mode.

Description

technical field [0001] The invention relates to a method for producing propylene by disproportionation of butene-containing carbon four-distillate hydrocarbons. Background technique [0002] Olefin disproportionation is a process in which the C=C double bond in the olefin is broken and re-formed under the action of a transition metal compound catalyst to obtain a new olefin product. Utilizing the cross-disproportionation effect of butene and ethylene, by adding an appropriate amount of ethylene, the relatively excess and low added value C 4 Olefin raw materials are converted into high value-added propylene products. [0003] US5898091 and US6166279 reported C 4 、C 5 Olefin handling. In the process of olefin disproportionation to propylene, the catalyst used is Re 2 o 7 / Al 2 o 3 , the reactor is a moving bed. US6358482 proposes a 4 Plants for the production of isobutene and propylene from distillate hydrocarbons. C 4 After selective hydrogenation and rectificatio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C11/06C07C2/00C07C4/06B01J23/30
CPCY02P20/52
Inventor 徐舟波王仰东刘苏徐炜杨为民
Owner CHINA PETROLEUM & CHEM CORP