Catalyst for production of propylene and ethylene with carbon alkatetraenes, regeneration and uses thereof

A technology for producing carbon tetraolefins and carbon tetraolefins, which is applied in the direction of catalyst regeneration/reactivation, molecular sieve catalysts, physical/chemical process catalysts, etc., can solve the problems of poor selectivity and short service life, and achieve convenient operation and low reaction temperature , The effect of simple preparation method and regeneration method

Active Publication Date: 2008-05-07
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] In order to solve the problems of short service life and poor selectivity in the prior art, the present invention, after a lot of in-depth research, uses C4 mixed hydrocarbons without diolefins as raw materials to produce propylene and ethylene catalysts and their regeneration methods and applications

Method used

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  • Catalyst for production of propylene and ethylene with carbon alkatetraenes, regeneration and uses thereof
  • Catalyst for production of propylene and ethylene with carbon alkatetraenes, regeneration and uses thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0039] Embodiment 1 prepares catalyst A

[0040] 50g ZRP molecular sieve (SiO 2 / Al 2 o 3 >200), 50g of silicon oxide, 2g of scallop powder; mix well, add 80ml of 5% nitric acid, mix well, extrude into 2mm cylindrical shape, and cut into 2-3mm; dry at 80°C and 120°C respectively After 10 hours, it was calcined at 580° C. for 6 hours, taken out, and cooled to room temperature. The obtained catalyst was denoted as Catalyst A. Put in a desiccator for later use.

Embodiment 2

[0041] Embodiment 2 prepares catalyst B

[0042] 45g ZRP molecular sieve (SiO 2 / Al 2 o 3 >200), 45g of silicon oxide, 10g of magnesium oxide and 2g of turnip powder were mixed, and after mixing, 80ml of nitric acid was added. Other operating methods are the same as in Example 1. The resulting catalyst is denoted Catalyst B.

Embodiment 3

[0043] Embodiment 3 prepares catalyst C

[0044] 45g ZRP molecular sieve (SiO 2 / Al 2 o 3 >200), 45g of silicon oxide, 10g of zirconia and 2g of turnip powder were mixed, and after mixing, 80ml of nitric acid was added. Other operating methods are the same as in Example 1. The resulting catalyst is denoted Catalyst C.

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Abstract

The invention discloses catalyst for preparing propylene and ethylene with C4 fraction and a regeneration method and application thereof, which belongs to the technical proposal of low molecular alkene preparing the propylene and ethylene, and relates to catalyst including 25 to 40 percent of high silica zeolite, 45 to 65 percent of silica and 10 to 15 percent of modified component provided for solving the problems of the prior art that the operation cycle is short, the selectivity is poor and the catalyst regeneration method is not provided, and the C4 mixture not including diolefin is takenas the raw material, water vapor is used as diluent, and the reaction is realized in a fixed-bed adiabatic reactor to produce the propylene and ethylene. The catalyst of the invention can be reused after being regenerated. The process of preparing propylene and ethylene of the invention has simple process and convenient operation, the operation cycle of the catalyst is long, the propylene and ethylene can be prepared for a long time with high efficiency, and the regeneration method of the catalyst of the invention is simple, and the service life is long.

Description

technical field [0001] The present invention relates to the catalyst and method of utilizing low molecular weight olefins to produce propylene and ethylene, more specifically, the present invention relates to the C4 raffinate of ethylene plant or the C4 fraction of oil refinery under the effect of catalyst, in fixed bed adiabatic reactor Processes for the production of propylene and ethylene as well as catalysts used and methods for their regeneration. Background technique [0002] With the rapid development of the national economy, propylene is an important organic raw material second only to ethylene, and its demand is also increasing, and its development speed is increasing. In 2002, the global propylene output was 56.95 million tons, and the demand in 2010 will reach 88 million tons. At present, the supply of propylene in my country is in short supply, and the traditional method of increasing propylene production can no longer meet the demand of the market. Hydrocarbon...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/40B01J29/48B01J29/78B01J38/16C07C11/04C07C11/06C07C4/06
CPCY02P20/52Y02P20/584
Inventor 王定博刘小波马志元韦以李普阳戴伟
Owner CHINA PETROLEUM & CHEM CORP
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