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Propylene yield increasing method

A technology of propylene and ethylene, which is applied in the field of catalytic reaction of butene-1 and butene-2 ​​carbon four fractions with ethylene to produce propylene. The effect of high propylene yield, good catalyst life and long catalyst activity period

Active Publication Date: 2010-12-22
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The technical problem to be solved by the present invention is to overcome the technical problems in the previous literature that consume a large amount of ethylene, the raw material requirements are harsh, the pretreatment is complicated, the application range is narrow, and the catalyst regeneration cycle is short, and a new method for producing propylene is provided.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Accurately weigh the required amount of ammonium metatungstate, add 200 ml of deionized water, and stir until completely dissolved. In addition, weigh the required amount of silica gel and put it into a 1000 ml round-bottomed flask, and bake the silica gel at 550°C for 3 hours in the air before use. Then pour the above-mentioned ammonium metatungstate solution into a round-bottomed flask filled with silica gel, evaporate the water in a rotary evaporator at 60°C, and then put it in an oven for drying overnight at 120°C. Put the above prepared sample in a muffle furnace and bake at 550°C for 4-12 hours to obtain WO 3 Catalyst in an amount of 12% by weight of the carrier.

[0024] Put 6 grams of the prepared tungsten oxide catalyst into a fixed-bed reactor with an inner diameter of 24 mm. Before the experiment, pass nitrogen to activate it at 550 ° C for 2 hours and then cool down to the reaction temperature. The raw material used in the experiment is pure butene-1, The ...

Embodiment 2～7

[0026] WO prepared according to the steps of Example 1 3 Content is the catalyst of 3%, put 6 grams of prepared tungsten oxide catalyst into the fixed-bed reactor that internal diameter is 24 millimeters, pass nitrogen before the experiment and cool down to reaction temperature after activating at 550 ℃ for 2 hours, the raw material used in the experiment For pure butene-1. 2 hours at airspeed -1 , under the condition of pressure 0.1MPa, the reaction results of different temperature conditions are shown in Table 1:

[0027] Table 1 butene-1 is the influence of different temperatures as raw material

[0028] Example serial number

Embodiment 8～13

[0030] [Embodiments 8-13]

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Abstract

The invention relates to an production increasing method for propylene. The invention mainly solves the technical problems of large ethylene consumption, limited raw material, complicated pre-processing, limited service range and short regeneration period of catalyst of the prior art. The invention has the technical proposal that ethylene and butylenes are taken as raw materials; the raw materialis contacted with catalyst to generate an effluent which is rich in propylene at the reaction temperature of 350 to 550 EDG C, the reaction pressure of 1.5 to 3.5 MPa through a meter, and the reaction space velocity of 0.1 to 20 hours<-1>, wherein, the weight proportion of the ethylene and the butylenes is 0 to 2:1. The catalyst comprises the components as follow: (a) SiO2 carrier, and (b) tungsten oxide which is carried on the SiO2 carrier and is 0.1 to 20 percent of the weight of the carrier, wherein, the specific surface area of the catalyst carrier is 200 to 700 m<2> g<-1>. The inventionrelatively well solves the technical problems mentioned above, and the invention can be used in the industrial production of the propylene.

Description

technical field [0001] The invention relates to a method for increasing the production of propylene, in particular to a method for producing propylene by catalytically reacting carbon four fractions rich in butene-1 and butene-2 ​​with ethylene. Background technique [0002] Propylene is one of the important basic raw materials, mainly used in the production of chemical products such as polypropylene, acrylonitrile, and propylene oxide. Among them, polypropylene accounts for more than half of the world's propylene demand. In recent years, with the rapid growth of demand for derivatives such as polypropylene, the demand for propylene has been increasing year by year. On the other hand, with the continuous increase of my country's ethylene production and crude oil processing capacity, the amount of C4 and C4-rich olefin-rich hydrocarbons produced by ethylene plants and refineries has increased significantly. In my country where oil resources are relatively scarce, how to mak...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C6/04C07C11/06
CPCY02P20/52Y02P20/584
Inventor 刘俊涛钟思青孙凤侠刘国强
Owner CHINA PETROLEUM & CHEM CORP
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