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Fluidizing cracking catalyst and method for reducing NOx emissions during fluid catalytic cracking

A fluidized cracking, catalyst technology, applied in catalyst activation/preparation, metal/metal oxide/metal hydroxide catalyst, physical/chemical process catalyst, etc., can solve the problem of reducing, affecting product composition, and detrimental to refinery profits And other issues

Inactive Publication Date: 2009-08-12
WR GRACE & CO CONN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Additives that increase unit conversion may be undesirable if the additive affects product yield, causes the unit to reach equipment limits, and / or reduces the amount of feed that can be processed
[0015] Therefore, any changes to the FCCU that affect the product composition or alter the ability to process the feedstock at the desired rate can be detrimental to refinery earnings

Method used

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  • Fluidizing cracking catalyst and method for reducing NOx emissions during fluid catalytic cracking

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preparation example Construction

[0034] Although the present invention is not limited to any particular method of preparation, generally the granular NO reducing x The composition is prepared by the following process: to reduce NO at the end x A composition comprising at least 10.0 weight percent ferrierite and at least 5.0 weight percent binder material in an amount sufficient to form a composition comprising ferrierite, an optional zeolite component, an inorganic binder, and an optional matrix An aqueous slurry of the material, which is thereafter spray dried to form particles. The spray-dried particles are optionally dried at a sufficiently high temperature for a sufficient time to remove volatiles, for example at about 90°C to about 320°C for about 0.5 to about 24 hours. In a preferred embodiment of the invention, the aqueous slurry containing ferrierite is ground prior to spray drying to reduce the average particle size of the material contained in the slurry to 10 microns or less, preferably 5 microns ...

Embodiment 1

[0069] A composition comprising 40% ferrierite, 40% clay and 20% silica sol (Additive A) was prepared as follows. In the Drais mill will contain 29% ferrierite (SiO 2 / Al 2 o 3 =20) to an average particle size of less than 2.5 microns. A slurry of ground ferrierite (4160 g) was mixed with 1200 g Natka clay (dry basis) and 6000 g silica sol binder (30% solids). Silica sol binders were prepared from sodium silicate and acid alum. The catalyst slurry was then spray dried in a Bowen spray dryer. The resulting spray-dried product was washed with ammonium sulfate solution and then with water to give Na 2 Catalysts having an O level of less than 0.1 weight percent. The properties of the additives are shown in Table 1 below.

Embodiment 2

[0071] A composition comprising 75% ferrierite and 25% alumina sol (Additive B) was prepared as follows. An aqueous slurry was prepared containing 2174 g of aluminum chlorohydrol solution (23% solids), 1500 g (dry basis) of ferrierite (SiO 2 / Al 2 o 3 =20,Na 2 O+K 2 (0<0.2) and enough additional water such that the slurry contains approximately 40% solids. The slurry was ground in a Drais mill to an average particle size of less than 2.5 microns, then spray dried in a Bowen spray dryer. The spray dried product was calcined at 1100°F for 90 minutes. The properties of the catalyst are shown in Table 1 below.

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Abstract

The present invention relates to a fluid cracking catalyst and a method for reducing the discharge amount of NOx in the fluid cracking period. The catalyst composition comprises the following components: (a) an FCC cracking component which is suitable for catalyzing the cracking of hydrocarbon under FCC condition, and (b) granular composition for reducing NOx. The granular composition for reducing NOx has an average particle size larger than 45 micrometer and comprises the following components: (i) at least 10 percent of ferrierite by weight and (ii) inorganic binder which accounts for about 5-50 percent by weight. The inorganic binder is selected from aluminum oxide, silicon dioxide, aluminum oxide-silicon dioxide, aluminum phosphate and the mixture thereof. The method of the invention comprises a step of contacting the raw material of hydrocarbon with the cracking catalyst composition in a raising temperature thereby forming the hydrocarbon component with low molecular weight.

Description

[0001] This application is a divisional application of the Chinese patent application with the filing date of November 4, 2004 and the international application number PCT / US2004 / 036642 that entered China. The application number of this Chinese patent application is 200480032749.9, and the title of the invention is "a ferrierite composition for reducing NOx emissions during fluid catalytic cracking". [0002] Cross References to Related Applications [0003] This application is a continuation-in-part of US Patent Application Serial No. 10 / 702,240, filed November 6,2003. technical field [0004] The present invention relates to the reduction of NO x composition, and use thereof to reduce NO in refinery processes, particularly in fluid catalytic cracking (FCC) processes x method of emissions. More specifically, the present invention relates to the reduction of NO x and its use for reducing NO released from a fluid catalytic cracking unit (FCCU) regenerator in an FCC process ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G11/02C10G11/18B01J29/80B01D53/86B01J23/42B01J23/83B01J29/08B01J29/65B01J35/00B01J37/00
CPCB01D53/8628B01J29/80B01J35/0006B01J23/83B01J2229/42B01J23/42B01J29/084B01D2258/00B01J37/0045B01J2229/18B01D2255/50B01J35/002C10G11/18B01J29/65B01J35/19B01J35/38B01J35/733B01J35/30
Inventor G·亚卢里斯M·S·齐巴思X·赵
Owner WR GRACE & CO CONN
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