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Process for catalytic conversion production of ethylene and propylene

A catalytic conversion method and propylene technology, applied in the field of catalytic cracking of hydrocarbons, can solve the problems that propylene production cannot meet market requirements, and achieve the effect of strong adaptability and easy separation of raw materials

Active Publication Date: 2005-07-06
CHINA PETROCHEMICAL CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Propylene is a basic petrochemical raw material as important as ethylene. With the continuous development of propylene application fields, the market demand for propylene is increasing, and the existing propylene production cannot meet market requirements.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Prepare the modified substances phosphorus, magnesium and lanthanum into a solution, then impregnate the ZSM-5 molecular sieve in the solution for 2.0 hours, then dry it at 100°C, and then roast it at 550°C to obtain Modified ZSM-5 molecular sieve. Then mix 30% modified ZSM-5 molecular sieve containing phosphorus, magnesium and lanthanum, 55% kaolin, the rest of aluminum sol and deionized water, and then dry it in an oven at about 110°C, and then place it at 550 Roasting at a temperature of ℃, crushing and sieving, the particles of 200-450 microns are the catalyst A.

Embodiment 2

[0026] Prepare the modified substances phosphorus, magnesium and lanthanum into a solution, then impregnate the ZSM-5 molecular sieve in the solution for 1.0 hour, then dry it at 120°C, and then roast it at 550°C to obtain Modified ZSM-5 molecular sieve. Then mix 50% modified ZSM-5 molecular sieve containing phosphorus, magnesium and lanthanum, 25% kaolin, the rest of aluminum sol and deionized water, and then dry it in an oven at about 130 ° C, and then place it at 550 The temperature is roasted at ℃, crushed and sieved, and the particles of 300-600 microns are the catalyst B.

Embodiment 3

[0028] Make a solution of modified substances phosphorus and calcium, then impregnate ZSM-5 molecular sieve in the solution for 3.0 hours, then dry it at 100°C, and then roast it at 550°C to obtain the modified After ZSM-5 molecular sieve. Then mix 30% of modified ZSM-5 molecular sieve containing phosphorus and calcium, 55% of amorphous silicon aluminum and the rest of kaolin and deionized water, and then dry it in an oven at about 110°C, and then place it at 550 The catalyst is calcined at a temperature of ℃, crushed and sieved, and the particles of 250-500 microns are catalyst C.

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Abstract

The present invention discloses a catalytic conversion method for producing ethylene and propylene. Hydrocarbon material contacts with a catalyst in a reactor under reaction temperature of 450 to 750 degrees centigrade, reaction pressure of 0.03 to 0.20 MPa, weight ratio between water vapour and raw oil of 0.01 to 1.00, weight hourly space velocity of 1 to 15 h-1, weight ratio between catalyst and raw oil of 2 to 20, the reaction product is separated from the catalyst of carbon deposit, which is burned for regeneration and periodic use after stripping, by a reaction product separating system, wherein the particle diameter of the catalyst ranges from 150 to 2000 micrometers. The inventive method can obtain higher ethylene and propylene yield under mild reaction conditions, and the olefin degree of the cracked gas is high, thereby being good for separation and utilization of the cracked product.

Description

technical field [0001] The invention relates to a catalytic cracking method for hydrocarbons, in particular to a catalytic conversion method for producing ethylene and propylene by catalytic cracking of petroleum hydrocarbon raw materials. Background technique [0002] Propylene is as important as ethylene as a basic petrochemical raw material. With the continuous development of propylene application fields, the market demand for propylene is increasing, and the existing propylene production cannot meet market requirements. The existing production methods of propylene include: the by-product propylene in the light hydrocarbon tube furnace steam cracking process, the propylene yield is generally about 60% of ethylene; through catalytic cracking or catalytic cracking process, a certain amount of propylene can be obtained Propylene; In addition, there are propane oxidative dehydrogenation to produce propylene. [0003] CN1031834A discloses a catalytic cracking method for produ...

Claims

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Application Information

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IPC IPC(8): C07C4/06C07C11/04C07C11/06
Inventor 王明党王龙延
Owner CHINA PETROCHEMICAL CORP
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