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Method for producing low-carbon olefin through petroleum hydrocarbon oil catalytic cracking

A technology for catalytic cracking and low-carbon olefins, applied in the field of low-carbon olefins yield, can solve the problem of low methanol conversion rate and high olefin selectivity, and achieve the effects of flexible product scheme, easy realization and wide range of processing raw materials

Active Publication Date: 2012-12-12
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0017] It can be seen from the existing technology that the coupling reaction of methanol conversion and catalytic cracking of petroleum hydrocarbons is limited by process conditions, catalyst activity and selectivity, and methanol conversion and olefin selectivity are not high enough

Method used

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  • Method for producing low-carbon olefin through petroleum hydrocarbon oil catalytic cracking
  • Method for producing low-carbon olefin through petroleum hydrocarbon oil catalytic cracking
  • Method for producing low-carbon olefin through petroleum hydrocarbon oil catalytic cracking

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] This example illustrates the performance of the process of the invention on a mesoscale plant operated as a continuous reaction-regeneration operation.

[0057] The petroleum hydrocarbon catalytic cracking reactor is in the form of a riser with an inner diameter of 16 mm and a height of 4 meters; the outlet of the riser reactor is located in the settler to realize rapid separation of catalyst and reaction oil and gas, and the reaction product is sent to the subsequent separation system; catalytic cracking The raw oil is heated to 300°C and enters the riser to contact with the regenerated catalyst. The ratio of the mass flow rate of the regenerant to the mass flow rate of the catalytic cracking raw oil feed is 8:1. The mass flow rate of the steam entering the riser and the catalytic cracking The ratio of the mass flow rate of feedstock oil to feed is 0.25:1, the reaction time is 3 seconds, and the riser outlet temperature is 520°C.

[0058] The carbon-deposited catalyst ...

Embodiment 2

[0082] Example 2 illustrates the implementation of the method provided by the present invention on a mesoscale plant operating in continuous reaction-regeneration.

[0083] The petroleum hydrocarbon catalytic cracking reactor is in the form of a riser with an inner diameter of 16 mm and a height of 4 meters; the outlet of the riser reactor is located in the settler to realize rapid separation of catalyst and reaction oil and gas, and the reaction product is sent to the subsequent separation system; catalytic cracking The raw oil is heated to 320°C and enters the riser to contact with the regenerated catalyst. The ratio of the mass flow rate of the regenerant to the mass flow rate of the catalytic cracking raw oil feed is 7:1. The mass flow rate of the steam entering the riser and the catalytic cracking The ratio of the mass flow rate of raw oil to feed was 0.25:1, the reaction time was 4 seconds, and the riser outlet temperature was 510°C.

[0084] The carbon-deposited catalys...

Embodiment 3

[0095] This example illustrates the experimental results of the process of the invention carried out on a medium-scale plant operated in continuous reaction-regeneration.

[0096] The petroleum hydrocarbon catalytic cracking reactor is in the form of a riser with an inner diameter of 16 mm and a height of 4 meters; the outlet of the riser reactor is located in the settler to realize rapid separation of catalyst and reaction oil and gas, and the reaction product is sent to the subsequent separation system; catalytic cracking The raw oil is heated to 280°C and enters the riser to contact with the regenerated catalyst. The ratio of the mass flow rate of the regenerant to the mass flow rate of the catalytic cracking raw oil feed is 5:1. The mass flow rate of the steam entering the riser and the catalytic cracking The ratio of the mass flow rate of raw oil to feed is 0.25:1, the reaction time is 4 seconds, and the riser outlet temperature is 500°C.

[0097] The carbon-deposited cat...

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Abstract

Provided is a method for producing low-carbon olefin through petroleum hydrocarbon oil catalytic cracking. A petroleum hydrocarbon raw material and a catalyst regenerating agent which enters a lift pipe reactor and is used for steam lifting are contacted and perform cracking reaction under the condition of the cracking reaction. The method is characterized by further comprising the step of introducing 10-50 weight% of carbon deposit catalyst into a fluidized bed reactor to be contacted with and react with an oxygen-containing compound raw material, wherein the feeding of the oxygen-containing compound raw material includes two portions, one feeding portion containing ethanol and / or diethyl ether enters from the bottom of the fluidized bed reactor after subjected to heat exchange, the other feeding portion with no ethanol and / or diethyl ether enters from the middle-lower portion of the reactor after subjected to heat exchange and temperature rise, and a mixture of a reaction oil-gas product and the catalyst returns to a precipitator through a conveying line at the top of the fluidized bed reactor to be mixed with cracking reaction oil and gas and the carbon deposit catalyst.

Description

technical field [0001] The invention relates to a method for increasing the yield of low-carbon olefins such as ethylene and propylene by integrating catalytic cracking of heavy oil with catalytic conversion of oxygen-containing compounds. Background technique [0002] Light olefins include ethylene and propylene, which are the basic raw materials for the production of many important chemical products (such as ethylene oxide, polyethylene, polyvinyl chloride and polypropylene, etc.). With the rapid development of my country's economy and the improvement of people's quality of life, the demand for ethylene and propylene is also increasing rapidly, and the annual growth rate exceeds the world average level. [0003] There are many ways to prepare light olefins. The steam cracking technology of light hydrocarbon raw materials such as naphtha is widely used in the world. More than 90% of the world's total production of ethylene and about 70% of propylene are produced by steam cr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G55/06C07C11/04C07C11/06C07C1/20
CPCY02P20/52Y02P20/584Y02P30/20Y02P30/40
Inventor 李明罡罗一斌张巍宗保宁舒兴田慕旭宏庄立
Owner CHINA PETROLEUM & CHEM CORP
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