Catalyst for preparing olefins with same carbon atom number by dehydrogenizing alkane mixtures of C4 and above, and preparation method and application thereof

An alkane mixture and catalyst technology, applied in physical/chemical process catalysts, hydrocarbons, hydrocarbons, etc., can solve problems such as difficulty and weak conversion of heavy oil, save energy, avoid strong endothermic processes, reduce The effect of energy consumption

Active Publication Date: 2013-02-27
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The active component of catalytic cracking catalyst is mainly Y molecular sieve with large pores, and the macromolecular hydrocarbons of the reaction raw materials are easy to diffuse into the pores for reaction, so its heavy oil conversion ability is strong; catalytic cracking catalysts generally use pores with strong shape selectivity Smaller ZSM-5 molecular sieves are used as active components, and it is more difficult for the macromolecular hydrocarbons of the reaction raw materials to diffuse into the pores, so its ability to convert heavy oil is weak

Method used

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  • Catalyst for preparing olefins with same carbon atom number by dehydrogenizing alkane mixtures of C4 and above, and preparation method and application thereof
  • Catalyst for preparing olefins with same carbon atom number by dehydrogenizing alkane mixtures of C4 and above, and preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0050] Take 6g of alumina powder (Jiangyan Auxiliary Factory, γ-type) and 14g of HMCM-41 molecular sieve (Nankai University Catalyst Factory) after molding and roasting (the weight ratio is 3:7), and immerse in 0.2mol / L NaNO 3 In 44ml of aqueous solution, take it out and dry at 120°C for 2 hours and roast at 500°C for 2 hours; then immerse in a hydrochloric acid solution dissolved in chloroplatinic acid. The immersion solution is 55ml of a solution with a concentration of 0.0074gPt / L. Take it out and dry at 120°C. , 450℃ air treatment for 2 hours; then immersed in 0.1mol / LBa(NO 3 ) 2 In 30 ml of the hydrochloric acid solution, take it out, dry at 120°C for 2 hours and calcinate at 500°C for 2 hours; to obtain catalyst E.

Embodiment 2

[0052] Take 6g of alumina powder (Jiangyan Auxiliary Factory, γ-type) and 14g of Hβ molecular sieve (Nankai University Catalyst Factory) after molding and roasting (weight ratio 3:7), soak in 0.1mol / L NaNO 3 In 44ml of the aqueous solution, take it out and dry it at 120°C for 2 hours and roast it at 500°C for 2 hours; then immerse it in a solution of chloroplatinic acid in hydrochloric acid. The immersion solution is 28ml of a solution with a concentration of 0.0074gPt / L. Dry for 2 hours, air treatment at 450℃ for 2 hours; then immerse in 0.05mol / L Ba(NO 3 ) 2 After taking out 44 ml of the hydrochloric acid solution, drying at 120°C for 2 hours and calcining at 500°C for 2 hours; catalyst F is obtained.

Embodiment 3

[0054] Take 6g of alumina powder (Jiangyan Auxiliary Factory, γ-type) and 14g of HY molecular sieve (Nankai University Catalyst Factory) after molding and roasting (weight ratio 3:7), and immerse in 0.1mol / L NaNO 3 In 44ml of the aqueous solution, take it out and dry at 120°C for 2 hours and roast at 500°C for 2 hours; then immerse it in a hydrochloric acid solution dissolved with chloroplatinic acid. The immersion solution is 55ml of a solution with a concentration of 0.0074gPt / L. Dry for 2 hours, air treatment at 450℃ for 2 hours; then immerse in 0.1mol / L Ba(NO 3 ) 2 Take it out and dry it at 120°C for 2 hours and calcinate at 500°C for 2 hours to obtain catalyst G.

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Abstract

The invention discloses a catalyst for preparing olefins with the same carbon atom number by dehydrogenizing alkane mixtures of C4 and above, and a preparation method and application thereof. The catalyst comprises the following components: a) 0.01 to 5 percent of platinum, b) 0.05 to 5 percent of alkali metal, c) 1 to 20 percent of at least one of alkaline-earth metal and / or rare-earth metal, d)40 to 75 percent of at least one of molecular sieves with the diameters of more than 6A and regular channel structures, and e) an adhesive, wherein the weight ratio of the molecular sieve to the adhesive is 0.5:1-5:1. The catalyst is prepared by a method comprising the steps of impregnating, molding and roasting. In the catalyst, the porous molecular sieve with a regular channel structure is usedas a carrier, so that the selectivity of the catalyst is improved and the service life of the catalyst can be prolonged; and the catalyst is applied to the preparation of low-carbon olefins by dehydrogenizing petroleum saturated hydrocarbons, and can reduce energy consumption and save the cost.

Description

Technical field [0001] The invention relates to the field of petrochemical industry, and more specifically, to a catalyst, preparation method and application for the dehydrogenation of C4 and above alkane mixtures to prepare olefins with the same carbon number. Background technique [0002] At present, the most common method for producing low-carbon olefins such as ethylene, propylene and butadiene from petroleum saturated hydrocarbons is steam cracking. About 99% of ethylene and more than 50% of propylene in the world are produced by this method. Since the production of steam cracking methods is currently operated under very harsh conditions, for example, the final temperature of the radiant section of the cracking furnace reaches or exceeds 1125°C, and the residence time of the material in the radiant section of the furnace is shortened to 0.2s or even less. Under the current technical level, the possibility of improvement in the production of low-carbon olefins such as ethyle...

Claims

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): B01J29/068C07C5/333
Inventor郝雪松白杰陈硕刘小波郭敬杭王国清
OwnerCHINA PETROLEUM & CHEM CORP