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Mixed C4 utilization method

A technology of mixing carbon four and mixing butene, which is applied in the direction of preparation of ether by addition of unsaturated compounds, organic chemistry, double decomposition reaction to hydrocarbon production, etc., can solve the problem of not being able to use effective raw materials such as ethylene and propylene, and achieve the effect of improving the utilization rate

Inactive Publication Date: 2012-03-14
CHINA PETROLEUM & CHEM CORP +1
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  • Claims
  • Application Information

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Problems solved by technology

[0007] The purpose of the present invention is to provide a mixed carbon four utilization method in view of the problem that the isobutane component with a higher yield in the prior art cannot be used as an effective raw material for the production of ethylene and propylene

Method used

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Embodiment 1

[0030] Composition (% by weight) is: butane 50%, isobutene 20%, n-butene 30% mixed carbon four 1 is introduced etherification unit, in cation exchange resin catalyst, cation exchange resin pore volume is 0.40ml / g, reaction temperature 58°C, reaction pressure 1.2MPa, reaction space velocity 7 hours -1 Catalyzed reaction with methanol to obtain MTBE product 2 and mixed carbon four 3 without isobutene under the condition of . The mixed carbon four 3 obtained in the etherification unit is introduced into the extraction unit 10, the solvent is acetonitrile, and the butane and butene are separated under the conditions of 45° C. at the top of the extraction column and 170° C. at the bottom of the extraction tower to obtain the mixed butane 5 and Mixed butene 4. Introduce the mixed butene 4 into the disproportionation propylene unit 11, using tungsten oxide as the catalyst, at 280-380°C, the reaction pressure is 1.0MPa, and the reaction space velocity is 0.5 hours -1 Under certain c...

Embodiment 2

[0034] according to figure 2 As shown, the composition (weight %) is: butane 55%, isobutene 20%, n-butene 25% mixed carbon four 1 is introduced into the etherification unit 9, in the macroporous cation exchange resin catalyst, the cation exchange resin pore volume is 0.42 ml / g, reaction temperature 62°C, reaction pressure 1.1MPa, reaction space velocity 9 hours -1Catalyzed reaction with methanol to obtain MTBE product 2 and mixed carbon four 3 without isobutene under the condition of . The mixed carbon four 3 obtained by the etherification unit is introduced into the extraction unit 10, the solvent is acetonitrile, and the butane and butene are separated under the condition of 45°C at the top of the extraction tower and 170°C at the bottom of the extraction tower to obtain mixed butane 5 and mixed Butene 4. Introduce the mixed butene 4 into the disproportionation propylene unit 11, using tungsten oxide as the catalyst, at 280-380°C, the reaction pressure is 1.5MPa, and the ...

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Abstract

The invention discloses a mixed C4 utilization method which comprises the following steps of: performing an etherification reaction between mixed C4 and methanol in the presence of cation exchange resin to generate MTBE and isobutene-free mixed C4, allowing the isobutene-free mixed C4 to enter into an extraction tower for extraction to obtain mixed butanes and mixed butylene, and allowing the mixed butane to perform a catalytic reaction in the presence of a modified shape-selective zeolite catalyst to generate propane and aromatic hydrocarbon. The mixed butylene is used as the raw material for the production of propylene. The mixed C4 is fully utilized, thus raising the yield of ethene and propylene.

Description

technical field [0001] The invention relates to the preparation of hydrocarbons from the redistribution reaction of hydrocarbons containing different carbon numbers, in particular to a method for producing propylene and MTBE products by utilizing carbon four. Background technique [0002] C4 is an important petrochemical resource. It is a general name for n-butane, isobutane, 1-butene, isobutene, cis-butene-2, trans-butene-2 ​​and butadiene. It mainly comes from oilfield gas , petroleum secondary processing and tube furnace steam cracking and other processes. C4 from oilfield gas and hydrocarbon reforming and hydrocarbon hydrogenation process is mainly composed of saturated hydrocarbons; C4 from catalytic cracking or catalytic cracking, coking and other processes is mainly a mixture of saturated hydrocarbons and monoolefins; from C4 in processes such as tube furnace steam cracking is a mixture of saturated hydrocarbons, mono-olefins and di-olefins. [0003] Ethylene and pr...

Claims

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Application Information

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IPC IPC(8): C07C43/04C07C41/06C07C11/06C07C6/04
CPCY02P20/52
Inventor 王明党翟海涛陈洋席清波
Owner CHINA PETROLEUM & CHEM CORP
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