Hydrocarbons catalytic conversion method

A catalytic conversion method and hydrocarbon conversion technology, applied in the field of catalytic conversion, can solve the problems of increased propylene yield and achieve the effect of high and low carbon olefin yield and high hydrocarbon conversion capacity

Active Publication Date: 2008-03-05
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The use of this catalyst can increase the content of isoparaffins in gasoline, while increasing the production of propylene and isobutane, but its propylene yield is only slightly increased

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0062] Examples of the method for producing the hydrocarbon conversion catalyst of the present invention include the following methods, but the present invention is not limited thereto.

[0063] Mix all or part of the heat-resistant inorganic oxide and / or its precursor with water and make a slurry, then add or not add the clay to the obtained slurry, and at this time, further add the remaining part of the heat-resistant inorganic oxide oxide and / or its precursor, and then add the zeolite mixture into the obtained slurry, mix and beat evenly, dry the obtained slurry, and then roast it. Wherein, before adding the zeolite mixture, before or after adding the clay, an acid is added to the resulting slurry to adjust the pH value of the slurry to 1-5. After the pH value reaches the specified range, the obtained slurry is aged at a temperature of 30-90° C. for 0.1-10 hours; after the aging is completed, the remaining part of the heat-resistant inorganic oxide and / or its precursor is a...

specific Embodiment approach

[0076] The following examples will further illustrate the method provided by the present invention, but do not limit the present invention thereby.

[0077] Examples 1-10 illustrate modified beta zeolites containing phosphorus and transition metal M and methods for their preparation. Among them, the Na in each modified β zeolite sample 2 O, Fe 2 o 3 、Co 2 o 3 , NiO, CuO, Mn 2 o 3 , ZnO, SnO 2 、Al 2 o 3 and SiO 2 The content of X-ray fluorescence is determined (see "Petrochemical Analysis Method (RIPP Experimental Method)", edited by Yang Cuiding, etc., Science Press, published in 1990).

[0078] All reagents used below are chemically pure reagents unless otherwise specified.

[0079] The following percentages are all percentages by weight unless otherwise specified.

Embodiment 1

[0081] With 100g (dry basis) zeolite beta (production of Qilu Catalyst Factory, SiO 2 / Al 2 o 3 = 25) with NH 4 Cl solution exchange wash to Na 2 The O content is lower than 0.2%, and the filter cake is obtained by filtration; add 6.8gH 3 PO 4 (concentration 85%) and 3.2gCu(NO 3 ) 2 ·3H 2 O was dissolved in 90g of water, mixed with filter cake, impregnated and dried; the obtained sample was roasted at 550°C for 2 hours to obtain modified zeolite beta B1 containing phosphorus and transition metal copper. The anhydrous chemical expression of B1 is: 0.1Na 2 O 8.2 Al 2 o 3 4.0P 2 o 5 1.0CuO 86.7SiO 2 .

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Abstract

The catalytic hydrocarbon converting process for preparing low carbon olefin cracks hydrocarbon material catalytically to obtain C2-C4 olefin, gasoline, diesel oil, heavy oil and other low molecular saturated hydrocarbons. The catalyst therefor contains zeolite mixture in 1-60 wt%, heat resistant inorganic oxide in 5-99 wt% and clay in 0-70 wt%. The zeolite mixture contains phosphorus and transition metal M modified beta- zeolite in 1-75 wt% and other kinds of zeolite, and the phosphorus and transition metal M modified beta- zeolite has the anhydrous chemical expression of (0-0.3)Na2O.(0.5-10)Al2O3.(1.3-10)P2O5.(0.7-15)MxOy.(64-97)SiO2, where, M is one or several selected from Fe, Co, Ni, Cu, Mn, Zn and Sn, x is the atom number of M and y is atom number of O in the oxide of M. The process of the present invention has high hydrocarbon converting capacity, and high low carbon olefin yield, especially high propene yield.

Description

technical field [0001] The present invention relates to a method for catalytic conversion of hydrocarbons, more specifically, a method for producing light olefins with high selectivity through catalytic conversion of hydrocarbons. Background technique [0002] Low-carbon olefins represented by ethylene and propylene are the most basic chemical raw materials. At home and abroad, natural gas and light petroleum hydrocarbons are mostly used to produce low-carbon olefins by steam cracking in ethylene complexes. The second largest source of light olefins is the refinery's catalytic cracking (FCC) unit. Conventional catalytic cracking process produces gasoline and light diesel oil by-product light olefins, but its yield only accounts for less than 15% of the raw oil. Refineries often use specially formulated catalytic cracking catalysts and / or additives to increase propylene yield. [0003] US5670037 discloses a method for catalytic conversion of hydrocarbons to prepare low-carb...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G55/06
CPCB01J29/40C10G2300/1044C10G2300/807C10G11/18B01J2229/18C10G2400/02B01J2229/42C10G2300/107B01J29/084B01J29/7815C10G2300/4093C10G2300/104C10G11/05C10G2300/1055B01J29/80C10G11/16B01J29/18C10G2300/1077C10G11/14C10G2400/20C10G11/02B01J29/60C10G2400/04B01J29/7057C10G2300/1074C10G2300/4018B01J37/0045B01J29/7615C10G2300/1033B01J29/06B01J29/076
Inventor 谢朝钢朱根权杨义华罗一斌龙军舒兴田张久顺
Owner CHINA PETROLEUM & CHEM CORP
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