Catalytic cracking with reduced emission of noxious gases
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
C10G-011/02
B01D-015/06
B01J-029/06
C01B-017/00
출원번호
US-0748555
(1976-12-08)
발명자
/ 주소
Vasalos Iacovos A. (Downers Grove IL) Ford William D. (Downers Grove IL) Hsieh Chuan-Kang R. (Naperville IL)
출원인 / 주소
Standard Oil Company (Indiana) (Chicago IL 02)
인용정보
피인용 횟수 :
70인용 특허 :
4
초록▼
A cyclic, fluidized catalytic cracking process providing reduced emissions of noxious effluents in regeneration zone flue gases is operated with homogeneous or non-homogeneous, regenerable, fluidized, solid particles which are circulated throughout the catalytic cracking process cycle and which comp
A cyclic, fluidized catalytic cracking process providing reduced emissions of noxious effluents in regeneration zone flue gases is operated with homogeneous or non-homogeneous, regenerable, fluidized, solid particles which are circulated throughout the catalytic cracking process cycle and which comprise (1) a molecular sieve-type cracking catalyst, comprising a cracking catalyst matrix containing crystalline aluminosilicate distributed throughout said matrix and (2) a metallic reactant which reacts with a sulfur oxide to form a metal- and sulfur-containing compound in the solid particles. The method involves regeneration of the cracking catalyst in the presence of a metallic oxidation promoter which can also be a component of the solid particles.
대표청구항▼
In a process for the cyclic, fluidized, catalytic cracking of hydrocarbon feedstock containing about 0.2 to about 6 weight percent sulfur as organic sulfur compounds wherein (i) said feedstock is subjected to cracking in a reaction zone in contact with fluidized solid particles comprising molecular
In a process for the cyclic, fluidized, catalytic cracking of hydrocarbon feedstock containing about 0.2 to about 6 weight percent sulfur as organic sulfur compounds wherein (i) said feedstock is subjected to cracking in a reaction zone in contact with fluidized solid particles comprising molecular sieve-type cracking catalyst; (ii) solid particles including catalytic particles which are deactivated by sulfur-containing carbonaceous deposits, are separated from reaction zone effluent and pass to a stripping zone wherein volatile deposits are removed from said solid particles by contact with a stripping gas; (iii) stripped, solid particles are separated from stripping zone effluent and pass to a catalyst regeneration zone and are regenerated by burning the non-stripped, sulfur-containing, carbonaceous deposits from the stripped, solid particles with an oxygen-containing gas thereby froming sulfur oxides; and (iv) resulting solid particles are separated from regeneration zone effluent gas and recycled to the reaction zone; a method for reducing emissions of carbon monoxide and sulfur oxides in the regeneration zone effluent gas which comprises: (a) circulating through the process cycle said solid particles comprising said catalyst and at least one metallic reactant in the same or different ones of said solid particles, which metallic reactant reacts with sulfur oxides in the regeneration zone, said metallic reactant consisting essentially of one or more members selected from the group consisting of sodium, magnesium, calcium, strontium, barium, scandium, titanium, chromium, molybdenum, manganese, cobalt, nickel, antimony, copper, zinc, cadmium, lead, and the rare earth metals, in free or combined form; (b) cracking said feedstock at a temperature from about 850°to about 1,200°F. and in contact with said cracking catalyst and said metallic reactant; (c) stripping volatile deposits from said solid particles at a temperature from about 850°to about 1,200°F. with a stripping gas which contains steam, wherein the ratio by weight of steam to said catalyst is from about 0.0005 to about 0.025; (d) burning in said regeneration zone said sulfur-containing carbonaceous deposits from the stripped, solid particles at a temperature from about 1,050°to about 1,450°F.; (e) withdrawing from said regeneration zone an effluent gas containing molecular oxygen; the improvement which comprises conducting said burning of the sulfur-containing carbonaceous deposits from the stripped, solid particles in the presence of at least one metallic promoter consisting essentially of one or more members selected from the group consisting of ruthenium, rhodium, palladium, osmium, iridium, platinum, vanadium, tungsten, uranium, zirconium, rhenium, and silver, in free or combined form, wherein the metallic promoter and the metallic reactant are present during said catalyst regeneration in sufficient amounts to effect absorption by said metallic reactant of at least about 50 weight percent of the sulfur oxides produced by said burning in said regeneration zone, and wherein the metallic promoter is present in sufficient amount to enhance said absorption of sulfur oxides and the conversion of carbon monoxide to carbon dioxide in the regeneration zone; said burning being conducted at a temperature and with oxygen-containing gas having molecular oxygen such that at least about 50 weight percent of the sulfur oxides produced by said burning in said regeneration zone can be absorbed by said metallic reactant; said solid particles recycled to the reaction zone having absorbed therein at least about 50 weight percent of said sulfur oxides produced in said regeneration zone; said stripped, solid particles passing to said regeneration zone having said metallic reactant in an active form for absorbing at least about 50 weight percent of said suLfur oxides produced in said regeneration zone; said stripping being conducted at a temperature and with steam such that passage of said solid particles through said cracking and stripping zones provides said metallic reactant in an amount and active form suitable for accomplishing said absorption of at least about 50 weight percent of said sulfur oxides produced in said regeneration zone; said effluent gas from said regeneration zone having a low concentration of sulfur oxides of less than about 600 ppmv; and substantially converting said absorbed sulfur oxides to sulfur-containing gas in said reaction and/or stripping zone.
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이 특허에 인용된 특허 (4)
Grand Harry S. (Willingboro NJ), Catalyst and method of preparing same.
Lussier Roger Jean (Ellicott City MD) Magee ; Jr. John Storey (Cooksville MD), Cracking with zeolite catalysts promoted with uranium or uranium plus silver.
Myers ; deceased George D. (late of Ashland KY by Virginia K. Myers ; administratrix), Addition of MgCl2to catalyst for cracking carbo-metallic feed oils.
Meguerian Garbis H. (Olympia Fields IL) Lorntson John M. (Naperville IL) Vasalos Iacovos A. (Downers Grove IL), Catalytic cracking with reduced emission of noxious gas.
Brown Stanley M. (Scotch Plains NJ) Byrne John W. (Saddle Brook NJ) Jacobs Harry E. (Glenwood IL), Catalytic cracking with reduced emissions of sulfur oxides.
Kumar, Ranjit; Cheng, Wu-Cheng; Sutovich, Kevin J.; Ziebarth, Michael S.; Shu, Yuying, High matrix surface area catalytic cracking catalyst stabilized with magnesium and silica.
Yoo Jin S. (Flossmoor IL) Radlowski Cecelia A. (Riverside IL) Karch John A. (Marriottsville MD) Bhattacharyya Alakananda (Columbia MD), Metal-containing spinel composition and process of using same.
Yoo Jin S. (Flossmoor IL) Radlowski Cecelia A. (Riverside IL) Karch John A. (Marriottsville MD) Bhattacharyya Alakananda (Columbia MD), Metal-containing spinel composition and process of using same.
Hansel John H. (Media PA) Linton Robert G. (Orefield PA) Stanger ; Jr. Charles W. (Brookfield IL), Method for promoting regeneration of a catalyst in a fluidized regenerator.
Peters Alan W. ; Rudesill John A. ; Weatherbee Gordon Dean ; Rakiewicz Edward F. ; Barbato-Grauso Mary Jane A., NO.sub.x reduction compositions for use in FCC processes.
Alan W. Peters ; John A. Rudesill ; Gordon Dean Weatherbee ; Edward F. Rakiewicz ; Mary Jane A. Barbato-Grauso, NOx reduction compositions for use in FCC processes.
Chester Arthur W. (Cherry Hill NJ) Cormier ; Jr. William E. (Clarksboro NJ) Stover William A. (Woodbury NJ), Octane and total yield improvement in catalytic cracking.
Hirschberg Eugene H. (Park Forest IL) Bertolacini Ralph J. (Naperville IL) Modica Frank S. (Downers Grove IL), Passivating metals on cracking catalysts with zinc.
Deschamps Andr (Noisy Le Roi FRX) Franckowiak Sigismond (Rueil Malmaison FRX) Leporq Serge (Mantes La Ville FRX), Process for removing sulfur oxides from a gas by means of an absorption mass regenerable by reaction with elemental sulf.
Deschamps Andr (Noisy le Roi FRX) Franckowiak Sigismond (Rueil-Malmaison FRX) Leporq Serge (Mantes la Ville FRX), Process for removing sulfur oxides from a gas by means of an absorption mass regenerable by reaction with elemental sulf.
McGovern Stephen J. (Deptford NJ) Owens Peter J. (West Deptford NJ) Dolan Michael J. (Laurel Springs NJ), Reducing sulfur trioxide concentration in regeneration zone flue gas.
Dimpfl William L. (Oakland CA) Blanton William A. (Woodacre CA), Simultaneous sulfur oxide and nitrogen oxide control in FCC units using cracking catalyst fines with ammonia injection.
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