With Both Catalytic And Thermal Cracking Patents (Class 208/52R)
  • Patent number: 6033555
    Abstract: The invention provides a process for improving the conversion of a hydrocarbon feedstock to light olefins comprising the steps of first contacting the hydrocarbon feedstock with a light olefin producing cracking catalyst and subsequently thermally cracking the unseparated stream to produce additional ethylene. Preferably the zeolite catalyst is selected from the group consisting of ferrierite, heulandite, phillipsite, faujasite, chabazite, erionite, mordenite, offretite, gmelinite, analcite, ZSM-5, ZSM-11, ZSM-25, gallium silicate zeolite, zeolite Beta, zeolite rho, ZK5, titanosilicate, zeolites having a silica to alumina molar ratio within the range of about 2.0:1 to 2000:1 ferrosilicate; zeolites such as those described in U.S. Pat. No. 4,238,318; borosilicate zeolites such as those described in Belgian Pat. No. 859656; zeolites designated by the Linde Division of Union Carbide by the letters of X, Y, A, L; zeolites such as those described in U.S. Pat. No.
    Type: Grant
    Filed: June 10, 1997
    Date of Patent: March 7, 2000
    Assignee: Exxon Chemical Patents Inc.
    Inventors: Tan-Jen Chen, Luc Roger Marc Martens
  • Patent number: 5788724
    Abstract: Process for the conversion of a hydrocarbon material having a high molecular weight, in particular petroleum residues or heavy crude oils or reduced crude oils, comprising the following steps:impregnating or mixing the hydrocarbon material with a catalyst;pyrolyzing the impregnated residue in a suitable zone at a temperature of between 450.degree. and 650.degree. C.
    Type: Grant
    Filed: May 7, 1996
    Date of Patent: August 4, 1998
    Assignee: Eniricerche S.p.A.
    Inventors: Angelo Carugati, Lorenzo Ippolito De Vita, Paolo Pollesel
  • Patent number: 5481052
    Abstract: This invention relates to a process for cracking waste polymers in a fluidized bed reactor to produce vaporous products comprising primary products which can be further processed, eg in a steam cracker to produce olefins, characterized in that the vaporous products are treated to generate a primary product substantially free of a high molecular weight tail having molecular weights >700 prior to further processing. The removal of the high molecular weight tail minimizes fouling and prolongs the lifetime of the reactors used for further processing.
    Type: Grant
    Filed: April 8, 1993
    Date of Patent: January 2, 1996
    Assignee: BP Chemicals Limited
    Inventors: Stephen Hardman, Stephen A. Leng, David C. Wilson
  • Patent number: 5228978
    Abstract: The inventive solvent extraction process uses hydrotreated (HTR) and low sulfur (LSR) resids feedstreams in a single deasphalter unit and in a way that optimizes the disposition of the oils, resins, and asphaltene fractions of each resid for downstream processing. After the refractory asphaltenes are separated from the HTR feedstream, the LSR resid is introduced into the deasphalter so that its resin and asphaltene fractions are combined with the HTR resins. The oils fractions from the two resids are combined and then used as a feedstock for catalytic cracking.
    Type: Grant
    Filed: January 23, 1992
    Date of Patent: July 20, 1993
    Assignee: Amoco Corporation
    Inventors: James L. Taylor, William I. Beaton, Jeffrey J. Kolstad
  • Patent number: 4695367
    Abstract: Diesel range fuel is produced in excess of gasoline range fuel from virgin hydrocarbon oils having low carbon content by heat soaking under mild thermal cracking conditions carried out at low pressure wherein the cracked fractions are removed substantially as they are formed.
    Type: Grant
    Filed: March 24, 1986
    Date of Patent: September 22, 1987
    Assignee: The M. W. Kellogg Company
    Inventors: Daniel D. Ezernack, Robert B. Armstrong
  • Patent number: 4569753
    Abstract: A combination process is described for upgrading residual oils and high boiling portions thereof comprising metal contaminants and high boiling Conradson carbon forming compounds comprising a thermal visbreaking operation with fluidizable inert solids followed by a fluidized zeolite catalytic cracking operation processing demetallized products of the visbreaking operation, regenerating solid particulate of each operation under conditions to provide CO rich flue gases relied upon to generate steam used in each of the fluidized solids conversion operation and downstream product separation arrangements, separating the wet gas product stream of each operation in a common product recovery arrangement and processing the high boiling feed product of visbreaking comprising up to 100 ppm Ni+V metal contaminant over a recycled crystalline zeolite cracking catalyst distributed in a sorbent matrix material comprising a high level of Ni+V metal contaminant.
    Type: Grant
    Filed: August 19, 1983
    Date of Patent: February 11, 1986
    Assignee: Ashland Oil, Inc.
    Inventors: Lloyd E. Busch, Paul W. Walters, Oliver J. Zandona
  • Patent number: 4443325
    Abstract: A combined process for treating heavy hydrocarbon feedstocks, such as resids that minimizes coke production and maximizes naphtha production, comprising the steps of thermally treating the feedstocks, in the absence of an added catalyst and either with or without hydrogen and steam, at a temperature of at least about 750.degree. F. (399.degree. C.) and under a pressure greater than about 400 psig to create significant chemical transformations without causing phase separation and consequent formation of sludge or a coke deposit; topping the thermally treated product to produce a distillate fraction and a bottoms fraction; coking the bottom fraction to produce gas, liquid products, and coke; and finally catalytically cracking the combined distillate fraction and liquid products to recover gas, gasoline, and light distillate products.
    Type: Grant
    Filed: December 23, 1982
    Date of Patent: April 17, 1984
    Assignee: Mobil Oil Corporation
    Inventors: Nai Y. Chen, Lillian A. Rankel
  • Patent number: 4332673
    Abstract: A process is disclosed for the production of high octane gasoline and/or other valuable lower molecular weight products from carbo-metallic oils. Examples include crude oil, topped crude, reduced crude, residua, the extract from solvent de-asphalting and other heavy hydrocarbon fractions. These carbo-metallic oils containing quantities of coke precursors and heavy metal catalyst poisons substantially in excess of what is normally considered acceptable for FCC processing (fluid catalytic cracking) and substantial amounts of sulfur, nitrogen and other troublesome components may also be present. Such carbo-metallic oils are converted to the desired products in a catalytic conversion process. Named "RCC" (Reduced Crude Conversion) after a particularyly common or useful carbo-metallic feed, the present process is by no means restricted to reduced crude or to oils of petroleum origin, having utility in the processing of oils from coal, shale and other sources.
    Type: Grant
    Filed: November 14, 1979
    Date of Patent: June 1, 1982
    Assignee: Ashland Oil, Inc.
    Inventor: George D. Myers
  • Patent number: 4325809
    Abstract: Metals deposited on an inert contact material during high temperature decarbonizing and demetallizing of heavy petroleum stocks are inactivated by mixing the contact material with a silica donor and reacting the mixture at high temperature in the presence of steam to induce migration of silica from the donor to mask metal on the contact material.
    Type: Grant
    Filed: August 8, 1980
    Date of Patent: April 20, 1982
    Assignee: Engelhard Minerals & Chemicals Corporation
    Inventor: David B. Bartholic
  • Patent number: 3948759
    Abstract: Heavy hydrocarbon feedstocks, such as atmospheric and vacuum residua, heavy crude oils and the like, are converted to predominantly liquid hydrocarbon products by contacting said feedstocks in the presence of hydrogen with a regenerable alkali metal carbonate molten medium containing a glass-forming oxide, such as boron oxide, at a temperature in the range of from above about the melting point of said molten medium to about 1000.degree.F. and at elevated pressures. Preferably, the regenerable molten medium comprises an oxide of boron in combination with a mixture of sodium and lithium carbonate or a mixture of sodium carbonate, potassium carbonate and lithium carbonate. The carbonaceous materials (coke) which are formed in the molten medium during the above-described conversion process are gasified by contacting said carbonaceous materials with a gaseous stream containing oxygen, steam, or carbon dioxide at temperatures of from above about the melting point of said medium to about 2000.degree.F.
    Type: Grant
    Filed: February 27, 1975
    Date of Patent: April 6, 1976
    Assignee: Exxon Research and Engineering Company
    Inventors: Laurence F. King, Noel J. Gaspar, Israel S. Pasternak