Catalytic pyrolysis process for producing petroleum hydrocarbon of ethylene and propylene

A technology for catalytic thermal cracking and petroleum hydrocarbons, which is applied in catalytic cracking, petroleum industry, cracking and other directions, can solve problems such as process methods that do not involve low-carbon olefins, and achieve the effects of increasing yield, high cracking activity, and increasing reaction temperature

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

AI Technical Summary

Problems solved by technology

[0013] In summary, the prior art has not yet involved the use of five-membered ring silicalite catalysts containing pho

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] This example illustrates that when using the catalyst A of the five-membered ring silicalite containing phosphorus, rare earth and iron, the method provided by the invention produces the situation of ethylene and propylene.

[0051] Using vacuum gas oil with a specific gravity of 0.873 and a boiling range of 350-540°C as the raw material, the reaction temperature is 700°C, the ratio of agent to oil is 25:1, the ratio of water to oil is 0.5:1, and the weight hourly space velocity is 10h -1 Under the operating conditions of , the catalytic pyrolysis test was carried out on a small-scale fixed fluidized bed reactor, and the results are listed in Table 1.

Embodiment 2

[0056] This example illustrates when using the catalyst B of the five-membered ring silicalite containing phosphorus, iron and nickel, the method provided by the invention produces the situation of ethylene and propylene.

[0057] Using vacuum gas oil with a specific gravity of 0.873 and a boiling range of 350-540°C as raw material, the reaction temperature is 620°C, the ratio of agent to oil is 15:1, the ratio of water to oil is 0.4:1, and the weight hourly space velocity is 150h -1 Under the operating conditions of , the catalytic pyrolysis test was carried out on a small-scale fixed fluidized bed reactor, and the results are listed in Table 2.

Embodiment 3

[0062] This example illustrates the preparation of ethylene and propylene by the process provided by the invention when using a five-membered ring silicalite containing phosphorus and iron and Catalyst C of REHY zeolite.

[0063] Using vacuum gas oil with a specific gravity of 0.873 and a boiling range of 350-540°C as raw material, the reaction temperature is 550°C, the ratio of agent to oil is 10:1, the ratio of water to oil is 0.3:1, and the weight hourly space velocity is 250h -1 Under the operating conditions of , the catalytic pyrolysis test was carried out on a small-scale fixed fluidized bed reactor, and the results are listed in Table 3.

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Abstract

The invention discloses a catalytic pyrolysis process for producing petroleum hydrocarbon of ethylene and propylene which comprises, feeding preheated petroleum hydrocarbon raw material into lift tubes, contacting phosphor modified five-membered ring high silicon zeolite catalyst for reaction under the condition of catalytic thermal cracking, thus separating the reaction product and catalyst to be produced, then loading the reaction product into subsequent separation system for product separation, stripping and regenerating the catalyst, returning to reactor for circulation.

Description

technical field [0001] The invention relates to a petroleum hydrocarbon catalytic pyrolysis method for producing ethylene and propylene. Background technique [0002] The traditional method of producing ethylene from petroleum hydrocarbons is steam thermal cracking, and the suitable raw materials are light petroleum hydrocarbons such as ethane, propane, butane, natural gas, naphtha or light diesel oil. As crude oil becomes heavier, the production of light petroleum hydrocarbons is limited, so people turn their attention to the process of producing ethylene from heavy petroleum hydrocarbons. For example, the pyrolysis method of heavy petroleum hydrocarbons using inert solids such as quartz sand and coke as heat carriers, and the pyrolysis method of heavy petroleum hydrocarbons using alkali metal or alkaline earth metal oxide catalysts as heat carriers, etc. The reaction temperature of these methods all exceeds 800°C. [0003] In recent years, some patents have introduced th...

Claims

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Application Information

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IPC IPC(8): C10G11/00
Inventor 谢朝钢李再婷龙军汪燮卿
Owner CHINA PETROLEUM & CHEM CORP
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