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Catalyst for preparing low carbon olefin by petroleum hydrocarbon cracking

A technology of low-carbon olefins and catalysts, applied in the field of catalysts, can solve the problems of reduced reaction activity of molecular sieves, and achieve the effect of improving reaction conversion rate and enhancing cracking ability

Inactive Publication Date: 2005-06-08
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] The method of modifying ZSM-5 molecular sieve with P and Mg has been reported in U.S. Patent USP4365104, and its purpose is to use the modified molecular sieve for xylene isomerization, to improve the selectivity of p-xylene, introducing P and Mg is mainly In order to enhance the shape-selective properties of molecular sieves; but on the other hand, the reactivity of acidic and hydrocarbon conversion of modified molecular sieves is reduced

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0038] 20gNH 4 Cl was dissolved in 1000g water, and 100g (dry basis) crystallization product ZRP-1 zeolite (produced by Qilu Petrochemical Catalyst Factory, SiO 2 / Al 2 o 3 =30, rare earth content RE 2 o 3 =4.0% by weight), after exchanging at 90°C for 0.5h, filter the filter cake; add 4.0gH 3 PO 4 (Concentration 85%) and 4.8gFe(NO 3 ) 3 Dissolved in 90g of water, mixed with the filter cake, soaked and dried; the obtained sample was roasted at 550°C for 2 hours. Its elemental analysis chemical composition is 0.1Na 2 O 4.9Al 2 o 3 2.4P 2 o 5 1.5Fe 2 o 3 3.8RE 2 o 3 87.3 SiO2 2 .

example 2

[0040] 50gNH 4 Dissolve Cl in 1000g of water, add 100g (dry basis) of the crystallized product ZRP-1 to this solution, exchange at 85°C for 0.5h, and filter to obtain a filter cake; mix 8.0g of NH 4 h 2 PO 4 Dissolve in 60g of water, mix with filter cake, immerse and dry, and roast at 550°C for 2 hours; mix the above sample with 5% Fe(NO 3 ) 3 The solution was exchanged at 80-90°C for 2 hours, filtered, and exchanged several times until the target amount was reached, and then calcined at 550°C for 2 hours. Elemental analysis chemical composition is 0.03Na 2 O 4.7 Al 2 o 3 4.5P 2 o 5 3.0 Fe 2 o 3 3.7RE 2 o 3 84.1 SiO2 2 .

example 3

[0042] 20gNH 4 Cl is dissolved in 1000g water, and in this solution, add 100g (dry base) crystallization product ZRP-5 (production of Qilu Petrochemical Catalyst Factory, SiO 2 / Al 2 o 3 =60), after exchanging at 90°C for 0.5h, filter to obtain a filter cake; add 3.8gH 3 PO 4 (concentration 85%) and 34.2gFe(NO 3 ) 3 Dissolved in 90g of water, mixed with the filter cake, soaked and dried; the obtained sample was roasted at 550°C for 2 hours. Elemental analysis chemical composition is 0.1Na 2 O 2.4Al 2 o 3 2.0P 2 o 5 10Fe 2 o 3 85.5SiO2 2 .

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Abstract

The invention discloses a catalyst for preparing low-carbon olefins by cracking petroleum hydrocarbons, which comprises 0-70% of clay, 5-99% of inorganic oxides and 1-50% of zeolite based on the weight of the catalyst. The zeolite is 25-100% by weight of MFI structure zeolite and 0-75% by weight of Y-type zeolite, which is characterized in that said MFI structure zeolite contains phosphorus and transition metal M, and its anhydrous chemical expression is expressed as oxide The mass is calculated as (0~0.3)Na 2 O, (0.3~5)Al 2 o 3 , (1.0~10)P 2 o 5 , (0.7~15)M x o y ,(0~10)RE 2 o 3 , (70~98) SiO 2 , wherein, M is selected from one or two metals in Fe, Co, Ni, Cu, Zn, Mo or Mn. The catalyst can enhance the cracking ability of heavy oil macromolecules, improve the reaction conversion rate, and the product has a higher C 2 ＝ ~C 4 ＝ Yield, especially C 3 ＝ yield.

Description

technical field [0001] The invention relates to a catalyst for producing low-carbon olefins by cracking petroleum hydrocarbons, and more specifically relates to a catalyst for producing low-carbon olefins by cracking petroleum hydrocarbons containing five-membered ring silicalite. Background technique [0002] Low-carbon olefins are important petrochemical raw materials. The commonly used production methods are steam cracking of natural gas; tube furnace thermal cracking of naphtha or light diesel oil; heat carrier cracking of heavy hydrocarbons and A method for the catalytic conversion of low-carbon alcohols. Conventional catalytic cracking units also produce low-carbon olefins by-products while producing gasoline and light diesel oil, and the yield accounts for less than 15% by weight of the feed oil. [0003] There are roughly three types of catalysts used when petroleum hydrocarbons are used as raw materials to produce low-carbon olefins by cracking or cracking methods:...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G11/04
Inventor 谢朝钢罗一斌赵留周王殿中施至诚李明罡舒兴田汪燮卿
Owner CHINA PETROLEUM & CHEM CORP
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