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Cracking assistant for improving low-carbon olefin concentration

A catalytic cracking aid and concentration technology, used in cracking, catalytic cracking, molecular sieve catalysts, etc., can solve problems such as weakening the conversion capacity of heavy oil, and achieve improved conversion capacity of heavy oil, good coke and dry gas selectivity, good wear resistance. Effect

Active Publication Date: 2014-08-20
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0021] At present, for the vast majority of catalytic cracking units, under the premise of the same liquefied gas yield, increasing the propylene concentration in the liquefied gas is an important way to improve the economic benefits of the catalytic cracking unit. The propylene additives disclosed in the prior art Used in the catalytic cracking process, the concentration of propylene in the liquefied gas is low, and when added in a large amount, it will weaken the conversion ability of heavy oil

Method used

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  • Cracking assistant for improving low-carbon olefin concentration
  • Cracking assistant for improving low-carbon olefin concentration
  • Cracking assistant for improving low-carbon olefin concentration

Examples

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preparation example Construction

[0035] In the preparation method of the catalytic cracking aid provided by the present invention, the phosphorus-aluminum inorganic binder containing the first clay, based on its dry weight, contains Al 2 o 3 15-40% by weight of aluminum components, with P 2 o 5 45-80% by weight of the phosphorus component and 1-40% by weight of the first clay on a dry basis, the P / Al weight ratio is 1.0-6.0, the pH is 1.0-3.5, and the solid content of the binder is 15 ~60% by weight. The preparation method of the first clay-containing phosphorus-aluminum compound inorganic binder comprises:

[0036] (1) beating and dispersing the alumina source, the first clay and water into a slurry with a solid content of 8 to 45% by weight; the alumina source is aluminum hydroxide and / or alumina that can be peptized by acid, and The dry basis of the first clay and Al 2 o 3 The weight ratio of the alumina source calculated is 1~40: 15~40;

[0037] (2) add concentrated phosphoric acid according to the...

Embodiment 1

[0061] 5kg NH 4 Cl was dissolved in 100kg of water, and 10kg (dry basis) of crystallization product ZSM-5 molecular sieve (produced by Sinopec Catalyst Qilu Branch Company, produced by amine method, SiO 2 / Al 2 o 3 =50), after exchanging at 90°C for 0.5h, filtered to obtain a filter cake; 0.56kg H 3 PO 4 (concentration 85% by weight) and 0.81kgFe(NO 3 ) 3 9H 2 O was dissolved in 9kg of water, and the impregnating liquid was mixed with the filter cake for impregnation, dried, and roasted at 550°C for 2 hours to obtain the sample after the first impregnation; 0.34kg of H 3 PO 4 (concentration 85% by weight) was dissolved in 9 kg of water, the impregnating solution was mixed with the sample after the above first impregnation, impregnated, dried, and roasted at 550 ° C for 2 hours to obtain the modified MFI molecular sieve of the present invention, denoted as A 1 . Elemental analysis chemical composition (mass) is 0.08Na 2 O·3.0Al 2 o 3 5.4P 2 o 5 1.5Fe 2 o 3 89.3 ...

Embodiment 2

[0066] 5kg NH 4 Cl is dissolved in 100kg of water, and 10kg (dry basis) of the crystallization product ZSM-5 molecular sieve (produced by Sinopec Catalyst Qilu Branch of Sinopec, synthesized by amine method, SiO 2 / Al 2 o 3 =50), after exchanging at 90°C for 0.5h, filtered to obtain a filter cake; 0.61kg H 3 PO 4 (concentration 85% by weight) and 3kg Co(NO 3 ) 2 ·6H 2 O was dissolved in 9kg of water to obtain an impregnating solution, which was mixed with the filter cake for impregnation, dried, and roasted at 550°C for 2 hours to obtain a sample; 0.32kgH 3 PO 4 (concentration 85% by weight) was dissolved in 9 kg of water to obtain an impregnating liquid, which was mixed with the above-mentioned sample for impregnation, drying, and roasting at 550° C. for 2 hours to obtain the modified MFI molecular sieve of the present invention, denoted as A 2 . Elemental analysis chemical composition is 0.11Na 2 O·2.8Al 2 o 3 5.5P 2 o 5 8.6Co 2 o 3 ·83SiO2 2 , the phosphoru...

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Abstract

The invention discloses a cracking assistant for improving a low-carbon olefin concentration. The cracking assistant comprises a modified MFI molecular sieve, a first clay-containing phosphor-aluminum inorganic binder and other inorganic binders, and second clay or no second clay. The first clay-containing phosphor-aluminum inorganic binder comprises an aluminum component, a phosphor component and first clay. The modified MFI molecular sieve contains phosphor and one or more of transition metals such as Fe, Co, Ni, Cu, Mn, Zn, Sn and Bi. There is not an absorption peak at the wavelength of 1633cm<-1> in a modified MFI molecular sieve infrared spectra obtained by trimethylpyridine as a probe molecule. The cracking assistant is used for catalytic cracking, can improve a catalytic cracking liquefied gas yield, can improve a yield of a low-carbon olefin such as propylene, can improve a heavy oil conversion capacity of a catalyst composition, and can improve the selectivity of dry gas and coke.

Description

technical field [0001] The invention relates to a cracking aid for improving low-carbon olefins in catalytic cracking liquefied gas. Furthermore, it relates to a cracking aid for increasing the concentration of propylene in catalytic cracking liquefied gas. Background technique [0002] Propylene is an important organic chemical raw material. With the increasing demand for propylene derivatives such as polypropylene, the demand for propylene is increasing year by year all over the world. Fluid catalytic cracking is an important method for the production of propylene and other low-carbon olefins. In order to increase the yield of propylene, it is an effective technical approach to use catalysts or additives containing zeolite with MFI structure in the catalytic cracking process. [0003] USP3,758,403 disclosed earlier that the method of adding ZSM-5 zeolite in the catalytic cracking catalyst can improve the octane number of gasoline and increase the C 3 ~C 4 Alkene yields...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J29/46B01J29/48B01J29/40C10G11/05
Inventor 陈蓓艳沈宁元朱玉霞罗一斌欧阳颖田辉平蒋文斌黄志青宋海涛
Owner CHINA PETROLEUM & CHEM CORP