Patents Represented by Attorney Ronald J. Cier
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Patent number: 5888378Abstract: A process for catalytic cracking of a hydrocarbon feedstock feeds to produce an enhanced yield of C.sub.3 to C.sub.5 olefins comprises contacting the feedstock with a catalyst composition comprising a large pore molecular sieve having a pore size greater than about 7 Angstrom and an additive component comprising a phosphorus-containing zeolite having a Constraint Index of about 1 to about 12 and a crystal size less than 0.2 micron.Type: GrantFiled: March 18, 1997Date of Patent: March 30, 1999Assignee: Mobile Oil CorporationInventor: Jocelyn Anne Kowalski
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Patent number: 5804690Abstract: A mono-methylation process for the production of methylated aromatics by reacting aromatics with dimethylcarbonate in the presence of a metal oxide or binary metal oxide catalyst. A process for preparing toluene from benzene by reacting with dimethylcarbonate and a process for preparing xylene from toluene by reacting with dimethylcarbonate are described.Type: GrantFiled: December 14, 1995Date of Patent: September 8, 1998Assignee: Mobil Oil CorporationInventors: Clarence D. Chang, Tracy J. Huang
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Patent number: 5779882Abstract: A layered composition of matter, MCM-56, has an X-ray diffraction pattern including lines at d-spacing values of 12.4.+-.0.2, 9.9.+-.0.3, 6.9.+-.0.1, 6.2.+-.0.1, 3.55.+-.0.07 and 3.42.+-.0.07 Angstroms and has been selectively modified so that the ratio of the number of active acid sites at its external surface to the number of internal active acid sites is greater than that of the unmodified material. When used as an additive to a large pore zeolite catalyst in the catalytic cracking of a petroleum feedstock, the modified MCM-56 gives an improved gasoline yield/octane relationship, an improved coke selectivity and a higher combined gasoline and potential alkylate yield than an identical catalyst containing unmodified MCM-56.Type: GrantFiled: July 22, 1996Date of Patent: July 14, 1998Assignee: Mobil Oil CorporationInventors: Arthur W. Chester, Anthony S. Fung, Charles T. Kresge, Wieslaw J. Roth
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Patent number: 5716514Abstract: Oxides of nitrogen (NO.sub.x) emissions from an FCC regenerator are reduced by operating the regenerator in partial CO burn mode and controlled turbulent/laminar flow processing of the flue gas. Partial CO burn FCC catalyst regeneration produces flue gas with CO and NO.sub.x precursors. Air is added to a turbulent flow reactor such as a flue gas transfer line where most NO.sub.x precursors are homogeneously converted while leaving some CO unconverted. A downstream CO boiler thermally converts this unconverted CO. NO.sub.x emissions are less than would be experienced using a like amount of air injection to a conventional CO boiler.Type: GrantFiled: August 30, 1995Date of Patent: February 10, 1998Assignee: Mobil Oil CorporationInventor: John S. Buchanan
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Patent number: 4393262Abstract: A process is disclosed whereby benzene is brought into contact with propylene, in the presence of a specified type of crystalline zeolite catalyst, to produce isopropylbenzene. The preferred zeolite catalysts are those having a silica to alumina ratio of at least about 12 and a constraint index, as herein defined, within the approximate range of 1-12. The process may be carried out in the liquid or the vapor phase at temperatures of from about 100.degree. C. to about 300.degree. C. and pressures ranging from 10.sup.5 N/m.sup.2 to 6.times.10.sup.6 N/m.sup.2.Type: GrantFiled: December 14, 1978Date of Patent: July 12, 1983Assignee: Mobil Oil CorporationInventor: Warren W. Kaeding
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Patent number: 4391739Abstract: A zeolite catalyst composition suitable for para-selective conversion of substituted aromatic compounds, e.g., to dialkylbenzene compounds rich in the 1,4-dialkylbenzene isomer. Such a composition comprises a zeolite catalyst having a silica to alumina mole ratio of at least 12 and a constraint index of about 1-12, and a minor amount, e.g., at least at 0.25 weight percent of one or more of the alkali metals (e.g., Li, Na, K, Cs) and optionally phosphorus, said alkali metals and phosphorus being present in the catalyst at least in part in the form of their oxides.Type: GrantFiled: January 18, 1982Date of Patent: July 5, 1983Assignee: Mobil Oil CorporationInventor: Chin-Chiun Chu
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Patent number: 4384155Abstract: A zeolite catalyst composition suitable for para-selective conversion of substituted aromatic compounds, i.e., conversion of aromatic compounds to dialkylbenzene compounds rich in the 1,4-dialkyl-benzene isomer. Such a composition comprises a zeolite catalyst component having a silica to alumina mole ratio of at least 12 and a constraint index of about 1 to 12, and a minor amount, e.g, at least 0.25 weight percent of the element cadmium and optionally the element phosphorus, said elements being present in the form of their oxides.Type: GrantFiled: November 4, 1981Date of Patent: May 17, 1983Assignee: Mobil Oil CorporationInventor: Chin-Chiun Chu
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Patent number: 4380685Abstract: A zeolite catalyst composition suitable for para-selective conversion of substituted aromatic compounds, e.g. conversion of aromatic compounds to dialkylbenzene compounds rich in the 1,4-dialkylbenzene isomer. Such a composition comprises a zeolite catalyst component having a silica to alumina mole ratio of at least 12 and a constraint index of about 1 to 12, and a minor amount, e.g., at least 0.25 weight percent of the elements iron and/or cobalt and optionally the element phosphorus, said elements being present in the form of their oxides.Type: GrantFiled: November 4, 1981Date of Patent: April 19, 1983Assignee: Mobil Oil CorporationInventor: Chin-Chiun Chu
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Patent number: 4374294Abstract: A zeolite catalyst composition suitable for para-selective conversion of substituted aromatic compounds, e.g., conversion of aromatic compounds to dialkylbenzene compounds rich in the 1,4-dialkylbenzene isomer. Such a composition comprises a zeolite catalyst component having a silica to alumina mole ratio of at least 12 and a constraint index of about 1 to 12, and a minor amount, e.g., at least 0.5 weight percent of a Group IIIA element, e.g., scandium, yttrium or Rare Earth elements, and optionally phosphorus, said elements being present in the form of their oxides.Type: GrantFiled: September 17, 1981Date of Patent: February 15, 1983Assignee: Mobil Oil CorporationInventor: Chin-Chiun Chu
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Patent number: 4374045Abstract: A zeolite catalyst composition suitable for para-selective conversion of substituted aromatic compounds, e.g., conversion of aromatics to dialkylbenzene compounds rich in the 1,4-dialkylbenzene isomer. Such a composition comprises a zeolite catalyst component having a silica to alumina mole ratio of at least 12 and a constraint index of about 1-12, and a minor amount, e.g., at least 0.25 weight percent, of copper, silver and/or gold, and optionally phosphorus.Type: GrantFiled: April 24, 1981Date of Patent: February 15, 1983Assignee: Mobil Oil CorporationInventor: Chin-Chiun Chu
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Patent number: 4371457Abstract: A modified zeolite catalyst composition useful for the conversion of aromatic compounds to dialkylbenzene compounds rich in the 1,4-dialkylbenzene isomer. The reaction is carried out in the presence of a zeolite catalyst having a silica to alumina mole ratio of at least 12 and a constraint index of about 1-12, said catalyst having been modified prior to use by treatment with compounds of Group VA of the Periodic Chart (V, Nb and Ta), and optionally phosphorus, to deposit a minor proportion of such elements on the zeolite.Type: GrantFiled: December 19, 1980Date of Patent: February 1, 1983Assignee: Mobil Oil CorporationInventor: Chin-Chiun Chu
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Patent number: 4371721Abstract: A process for selective cracking of 1,4-disubstituted benzene compounds having at least one polar substituent. Mixtures containing isomers of such a compound are brought into contact with a specified type of shape selective crystalline zeolite catalyst under conditions of temperature and pressure conducive to reaction of said benzene compound, thereby selectively reacting the 1,4-disubstituted isomer in preference to the 1,2- and 1,3-disubstituted isomers of said polar benzene compound. The shape selective zeolite catalysts employed herein are crystalline zeolites characterized by a silica to alumina ratio of at least about 12 and a constraint index within the approximate range of 1 to 12.Type: GrantFiled: September 25, 1981Date of Patent: February 1, 1983Assignee: Mobil Oil CorporationInventor: Margaret M. Wu
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Patent number: 4371714Abstract: A process for the selective alkylation of phenol or its alkyl ethers, in the presence of a particular type of zeolite catalyst, to produce a product rich in 4-alkyl phenyl alkyl ethers (e.g. 4-methylanisole). The zeolite is characterized by a Constraint Index of 1 to 12 and a silica to alumina mole ratio of at least 12, and may optionally contain a minor amount of a difficultly reducible oxide.Type: GrantFiled: December 30, 1980Date of Patent: February 1, 1983Assignee: Mobil Oil CorporationInventor: Lewis B. Young
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Patent number: 4358397Abstract: A modified zeolite catalyst composition useful for the conversion of aromatic compounds to dialkylbenzene compounds rich in the 1,4-dialkylbenzene compounds rich in the 1,4-dialkylbenzene isomer. The reaction is carried out in the presence of a zeolite catalyst having a silica to alumina mole ratio of at least 12 and a constraint index of about 1-12, said catalyst having been modified by treatment with compounds of Group IV A (Ti, Zr, Hf), and optionally phosphorus, to deposit a minor proportion of such elements on the zeolite.Type: GrantFiled: December 31, 1980Date of Patent: November 9, 1982Assignee: Mobil Oil CorporationInventor: Chin C. Chu
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Patent number: 4329509Abstract: A process for the co-production of 2-alkanones having at least five carbon atoms and phenol or a substituted phenol. In the first step, benzene or a substituted benzene is alkylated with an alkyl moiety of at least five carbon atoms to selectively produce the 2-arylalkane isomer. Subsequent oxidation to the hydroperoxide and acid cleavage thereof yields the desired product. The alkylation step is carried out in the presence of a novel class of selective crystalline zeolite materials having pore openings with a major dimension of six to seven angstroms.Type: GrantFiled: January 22, 1981Date of Patent: May 11, 1982Assignee: Mobil Oil CorporationInventors: Werner O. Haag, Lewis B. Young
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Patent number: 4329533Abstract: A process for the conversion of aromatic compounds to dialkylbenzene compounds rich in the 1,4-dialkylbenzene isomer. The reaction is carried out in the presence of a particular type of zeolite catalyst having a silica to alumina mole ratio of at least 12 and a constraint index of about 1-12, said catalyst having been modified by treatment with metal compounds of elements from Group IA of the Periodic Chart, and optionally phosphorus, to deposit a minor proportion of such elements on the zeolite.Type: GrantFiled: May 5, 1980Date of Patent: May 11, 1982Assignee: Mobil Oil CorporationInventor: Chin-Chiun Chu
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Patent number: 4302622Abstract: A process for the conversion of aromatic compounds to dialkylbenzene compounds rich in the 1,4-dialkylbenzene isomer. The reaction is carried out in the presence of a particular type of zeolite catalyst having a silica to alumina mole ratio of at least 12 and a constraint index of about 1-12, said catalyst having been modified by treatment with compounds of scandium, yttrium and/or samarium, and optionally phosphorus, to deposit a minor proportion of such elements on the zeolite.Type: GrantFiled: December 2, 1980Date of Patent: November 24, 1981Assignee: Mobil Oil CorporationInventor: Chin-Chiun Chu
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Patent number: 4302620Abstract: A process for the conversion of aromatic compounds to dialkylbenzene compounds rich in the 1,4-dialkylbenzene compounds rich in the 1,4-dialkylbenzene isomer. The reaction is carried out in the presence of a particular type of zeolite catalyst having a silica to alumina mole ratio of at least 12 and a constraint index of about 1-12, said catalyst having been modified by treatment with compounds of Group IV A (Ti, Zr, Hf), and optionally phosphorus, to deposit a minor proportion of such elements on the zeolite.Type: GrantFiled: October 29, 1980Date of Patent: November 24, 1981Assignee: Mobil Oil CorporationInventor: Chin-Chiun Chu
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Patent number: 4302621Abstract: A process for the conversion of aromatic compounds to dialkylbenzene compounds rich in the 1,4-dialkylbenzene isomer. The reaction is carried out in the presence of a particular type of zeolite catalyst having a silica to alumina mole ratio of at least 12 and a constraint index of about 1-12, said catalyst having been modified by treatment with compounds of Group V A of the Periodic Chart (V, Nb and Ta), and optionally phosphorus, to deposit a minor proportion of such elements on the zeolite.Type: GrantFiled: October 29, 1980Date of Patent: November 24, 1981Assignee: Mobil Oil CorporationInventor: Chin-Chiun C. Chu
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Patent number: 4301316Abstract: A process for the selective alkylation of substituted or unsubstituted benzene compounds with relatively long chain length alkylating agents to produce phenylalkanes having an improved yield of the more external phenyl isomers. The reaction is carried out in the presence of crystalline zeolite catalysts, such as ZSM-4, ZSM-20, ZSM-38, mazzite, Linde Type L and zeolite Beta.Type: GrantFiled: November 20, 1979Date of Patent: November 17, 1981Assignee: Mobil Oil CorporationInventor: Lewis B. Young