Catalytic conversion process for producing ethylene and propylene using low-density oil fraction

A light oil, catalytic conversion technology, applied in catalytic cracking, petroleum industry, cracking, etc., can solve problems such as unrelated process methods, and achieve the effects of high selectivity, high cracking activity, and wide source of raw materials

Inactive Publication Date: 2005-01-19
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0011] In summary, the prior art has not yet involved the production of ethylene and propylene by catalytic conversion of light petroleum fractions rich in olefins such as C4, C5, and gasoline fractions as raw materials.

Method used

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Examples

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Embodiment 1

[0030] This embodiment illustrates: adopt the method provided by the present invention, the situation that olefin-rich light petroleum distillate is catalytically converted in a small-scale riser plus a fluidized bed reactor to produce ethylene and propylene

[0031] Using the steam cracked C4 fraction with an alkane content of 19.8% by weight and an olefin content of 80.2% by weight as a raw material, catalyst A was used to conduct a catalytic conversion test on a small riser plus fluidized bed reactor device with continuous reaction-regeneration operation. The raw materials are transported to the fluidized bed reactor of the riser plus fluidized bed reactor device. When the reaction temperature is 650°C, the pressure at the top of the reactor is 180 kPa, and the weight hourly space velocity of the feed is 4 -1 1. The weight ratio of the catalyst to the raw material is 30:1, and the weight ratio of the water vapor to the raw material is 0.25:1, and the catalytic conversion rea...

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Abstract

The invention discloses a catalytic conversion process for producing ethylene and propylene using low-density oil fraction which comprises, contacting lightweight petroleum distillate containing rich olefin with heated five-membered ring high silicon zeolite catalyst, reacting under catalytic conversion condition, thus separating the reaction product and catalyst to be produced, leading out the resultant from the main reaction zone and further separating, then loading the catalyst into regenerator after stripping for carbon burning reproduction at the presence of oxygen-containing gas, finally loading the heated regenerated catalyst into pre-reaction zone for recycling.

Description

technical field [0001] The present invention belongs to the catalytic conversion method of petroleum hydrocarbons in the absence of hydrogen, more specifically, a method for producing ethylene and propylene by catalytic conversion of light petroleum fractions. Background technique [0002] At present, the production of ethylene and propylene mainly adopts the tube furnace steam cracking method, while catalytic cracking also produces a certain amount of propylene by-product while producing gasoline and diesel oil. In addition, these technologies also by-produce a certain amount of C4 and gasoline fractions with high olefin content. . Due to the extensive use of natural gas, the market for C4 fractions as domestic fuels is getting smaller and smaller, and gasoline with high olefin content cannot meet the new gasoline specification standards. Therefore, it is realistic to convert C4, C5 and gasoline fractions with high olefin content into ethylene and propylene. significance. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G11/05
CPCY02P20/584
Inventor 谢朝钢杨义华朱根权龙军汪燮卿
Owner CHINA PETROLEUM & CHEM CORP
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