Patents Represented by Attorney Vincent J. Cavalieri
  • Patent number: 5098230
    Abstract: A method is disclosed for withdrawing particulate spent catalyst particles from a packed, non-fluidized bed of such particles in contact with a liquid medium within a vessel having a withdrawal conduit or pipe which has an inlet that opens within the bottom of the bed and faces generally downwardly so that a first section extends upwardly from the inlet, and a second section extends downwardly, and the spent catalyst particles exits the packed bed through a uniform and continuous flow path opening into a solids recovery vessel whose pressure is controlled to regulate flow of such spent catalyst from the reaction vessel independent of the rate of flow through the withdrawal conduit.
    Type: Grant
    Filed: December 16, 1988
    Date of Patent: March 24, 1992
    Assignee: Chevron Research Company
    Inventor: Georgieanna L. Scheuerman
  • Patent number: 4606815
    Abstract: A process for hydrotreating hydrocarbon feedstocks using shaped catalysts is disclosed. When the catalyst is used for diffusion limited reactions, and particularly when it is used for demetalation, shaped catalysts give longer catalyst lifetimes. Preferred shaped include oval and elliptical shapes, with and without bumps.
    Type: Grant
    Filed: September 28, 1984
    Date of Patent: August 19, 1986
    Assignee: Chevron Research Company
    Inventor: Kirk R. Gibson
  • Patent number: 4322529
    Abstract: New dyestuff salts of the formula ##STR1## wherein A denotes the radical of an azine dyestuff, R, R.sub.1 and R.sub.2 denote alkyl radicals with a total of 10-24 carbon atoms and n denotes the number 1-4. The dyestuff salts show excellent solubility in organic solvents such as alcohols, ketones and esters. Due to the excellent solubility in organic solvents, the dyestuff of the instant invention are especially suitable for dyeing solutions of polymers such as polystyrene or polyamides.
    Type: Grant
    Filed: November 16, 1977
    Date of Patent: March 30, 1982
    Assignee: Ciba-Geigy Corporation
    Inventor: Werner Kuster
  • Patent number: 4321218
    Abstract: Tris-(2,4-di-t-octylphenyl)-phosphite is suitable as a stabilizer for organic material.
    Type: Grant
    Filed: April 30, 1980
    Date of Patent: March 23, 1982
    Assignee: Ciba-Geigy Corporation
    Inventors: Michael Rasberger, Helmut Muller
  • Patent number: 4312818
    Abstract: A process for producing triarylphosphites of the formula (RO).sub.3 P, in which R represents aryl or aryl substituted by one or more straight-chain or branched-chain alkyl, cycloalkyl, aryl or aralkyl groups, by reaction of phosphorus trihalides with hydroxy-substituted aromatic compounds of the formula ROH in the presence of 0.005 to 10 mol %, relative to the hydroxy-substituted aromatic compound, of a catalyst, optionally in the presence of a solvent, in which process the catalyst used is a compound from the group comprising amines or ammonium salts, amides of carboxylic acid and thiocarboxylic acids and also of oxygen acids of phosphorus, non-aromatic nitrogen-containing heterocycles and salts thereof, guanidines, amidines and azomethines and also salts thereof, sulfones, sulfoxides and sulfonium salts, primary, secondary and tertiary phosphines and salts thereof, phosphine oxides, phosphine sulfides or esters of phosphoric acids.
    Type: Grant
    Filed: December 13, 1979
    Date of Patent: January 26, 1982
    Assignee: Ciba-Geigy Corporation
    Inventors: Rudolf Maul, Eberhard Otto, Horst Zinke
  • Patent number: 4219464
    Abstract: Compounds having the formula ##STR1## wherein R.sub.1 and R.sub.2 are lower alkyl or together lower alkylene,R.sub.3 is hydrogen, alkyl, methoxyethyl, alkenyl, propargyl, benzyl, alkyl substituted benzyl, or acyl,R.sub.4 is alkylene of 1 to 4 carbon atoms substituted with alkyl or alkenyl of 1 to 18 carbon atoms, alkenylene of 1 to 4 carbon atoms, cycloalkylene, cycloalkenylene, bicycloalkylene, bicycloalkenylene, or phenylene,M is hydrogen or a metal, andz has a value of from 1 to 4, and either (a) R.sub.5 is alkyl of 1 to 6 carbon atoms, R.sub.6 is alkyl of 1 to 6 carbon atoms, and R.sub.7 and R.sub.8 are independently hydrogen or alkyl of 1 to 5 carbon atoms, provided that R.sub.7 and R.sub.8 are not both hydrogen, or(b) R.sub.5 and R.sub.6 are together lower alkylene and R.sub.7 and R.sub.8 are independently hydrogen or alkyl of 1 to 5 carbon atoms,are good light stabilizers.
    Type: Grant
    Filed: May 30, 1978
    Date of Patent: August 26, 1980
    Assignee: Ciba-Geigy Corporation
    Inventors: Chester E. Ramey, John J. Luzzi
  • Patent number: 4214088
    Abstract: Stabilization of chlorine-containing thermoplasts with 1,4-dihydro-2,6-dimethylpyridine-3,5-dicarboxylic acid esters alone or, in particular, together with a metal-containing stabilizer as synergist.
    Type: Grant
    Filed: November 8, 1978
    Date of Patent: July 22, 1980
    Assignee: Ciba-Geigy Corporation
    Inventors: Gerd Abeler, Rudolf Maul
  • Patent number: 4210578
    Abstract: 4-Siloxy derivatives of sterically hindered piperidines are effective light-stabilizers for plastics. These compounds have at least five alkyl groups in the ring positions 2, 3, 5 and 6 and four alkyl groups in ring positions 2 and 6, preferably methyl and ethyl groups. The ring nitrogen may be unsubstituted or substituted with a monovalent organic residue. The new compounds can be synthesized by O-silylation of 4-hydroxy-polyalkylpiperidines, preferably by reaction with chlorosilanes.
    Type: Grant
    Filed: November 17, 1978
    Date of Patent: July 1, 1980
    Assignees: Ciba-Geigy Corporation, Sankyo Company, Limited
    Inventors: Jean Rody, Gerd Greber, Helmut Muller
  • Patent number: 4208522
    Abstract: Substituted piperazine diones are stabilizers for synthetic polymeric materials normally subject to deterioration caused by ultraviolet light. The compounds are prepared by the alkylation reaction between a substituted piperazine dione and an organic halide. Polymeric compositions containing these stabilizers may also contain a hindered phenolic compound. A typical embodiment is 15,15'-dodecamethylenebis(7,15-diazadispiro[5,1,5,3]hexadecane-14,16-dione ).
    Type: Grant
    Filed: October 6, 1978
    Date of Patent: June 17, 1980
    Assignee: Ciba-Geigy Corporation
    Inventors: Chester E. Ramey, John J. Luzzi
  • Patent number: 4208525
    Abstract: Process for the reduction of 4-oxo-2,2,6,6-tetraalkylpiperidines, and the N-alkyl derivatives thereof, to 2,2,6,6-tetraalkylpiperidines unsubstituted in the 4-position, wherein the reduction is carried out with catalytically activated hydrogen in an acid medium.
    Type: Grant
    Filed: December 5, 1977
    Date of Patent: June 17, 1980
    Assignee: Ciba-Geigy Corporation
    Inventors: Michael Rasberger, Peter Baumeister
  • Patent number: 4207229
    Abstract: Compounds of the formula ##STR1## wherein R.sub.1 and R.sub.2 are independently lower alkyl or hydrogen, provided that only one of R.sub.1 and R.sub.2 is hydrogen,R.sub.3 is --(A).sub.q --COOR.sub.4 or CN whereA is alkylene of 1 to 6 carbon atoms,R.sub.4 is alkyl of 1 to 24 carbon atoms, phenyl or alkyl substituted phenyl,q is 0 or 1, and R.sub.11 is alkylene of 1 to 34 carbon atoms, arylene or a direct bond, are suitable for stabilizing organic material against thermal, oxidative and ultraviolet light degradation.
    Type: Grant
    Filed: May 8, 1978
    Date of Patent: June 10, 1980
    Assignee: Ciba-Geigy Corporation
    Inventor: John D. Spivack
  • Patent number: 4203890
    Abstract: Compounds having the formula ##STR1## wherein R.sub.1 and R.sub.2 are lower alkyl or together lower alkylene,R.sub.3 is hydrogen, alkyl, methoxyethyl, alkenyl, propargyl, benzyl, alkyl substituted benzyl, or acyl,R.sub.4 is alkylene of 1 to 4 carbon atoms substituted with alkyl or alkenyl of 1 to 18 carbon atoms, alkenylene of 1 to 4 carbon atoms, cycloalkylene, cycloalkenylene, bicycloalkylene, bicycloalkenylene, or phenylene,M is hydrogen or a metal, andz has a value of from 1 to 4, and either (a) R.sub.5 is alkyl of 1 to 6 carbon atoms, R.sub.6 is alkyl of 1 to 6 carbon atoms, and R.sub.7 and R.sub.8 are independently hydrogen or alkyl of 1 to 5 carbon atoms, provided that R.sub.7 and R.sub.8 are not both hydrogen, or (b) R.sub.5 and R.sub.6 are together lower alkylene and R.sub.7 and R.sub.8 are independently hydrogen or alkyl of 1 to 5 carbon atoms,are good light stabilizers.
    Type: Grant
    Filed: May 30, 1978
    Date of Patent: May 20, 1980
    Assignee: Ciba-Geigy Corporation
    Inventors: Chester E. Ramey, John L. Luzzi
  • Patent number: 4199494
    Abstract: Metal salts of monoalkyl .alpha.-aminophosphonates or of .alpha.-aminophospinates show a considerable thermostability. Obviously the amino groups are coordinated on the metal atom. These complex salts are soluble in organic solvents and compatible even with non-polar plastics such as polyolefins. They are effective stabilizers against the light-induced deterioration of polymers with an outstanding duration of this activity.The cation of these salts may be a complex-forming multivalent metal, preferable nickel, cobalt, zinc and aluminum. The amino group may be primary, secondary or tertiary. The complex salts are prepared according conventional processes, for example by conversion of the corresponding alkali phosphonate with a metal halide in organic solution.This is a continuation of application Ser. No. 682,871 filed on May 3, 1976, now abandoned which is a continuation-in-part of application Ser. No. 503,426, filed on Sept. 5, 1974, now abandoned.
    Type: Grant
    Filed: December 21, 1977
    Date of Patent: April 22, 1980
    Assignee: Ciba-Geigy Corporation
    Inventors: Paul Moser, Jean Rody
  • Patent number: 4196117
    Abstract: Alkylated 1,1'-biphenyl-2,2'-diyl phosphiates are prepared by reacting alkylated 2,2'-biphenol with phosphorus trichloride in an organic solvent an then reacting the intermediate with an alcohol or a thiol. Said phosphites are useful as stabilizers of organic polymers and lubricating oils, especially as process stabilzers for polyolefins, polyesters and polycarbonates.
    Type: Grant
    Filed: January 3, 1978
    Date of Patent: April 1, 1980
    Assignee: Ciba-Geigy Corporation
    Inventor: John D. Spivack
  • Patent number: 4195016
    Abstract: Compounds of the formula ##STR1## wherein R.sub.1 and R.sub.2 are independently lower alkyl or hydrogen, provided that only one of R.sub.1 and R.sub.2 is hydrogen,R.sub.3 is --(A)q--COOR.sub.4 or CN whereA is alkylene of 1 to 6 carbon atoms,R.sub.4 is alkyl of 1 to 24 carbon atoms, phenyl or alkyl substituted phenyl,X is S or 0,R.sub.6 is phenylene, alkyl substituted phenylene or alkylene, andq is 0 or 1 are suitable for stabilizing organic material against thermal, oxidative and ultraviolet light degradation.
    Type: Grant
    Filed: May 8, 1978
    Date of Patent: March 25, 1980
    Assignee: Ciba-Geigy Corporation
    Inventor: John D. Spivack
  • Patent number: 4193913
    Abstract: Thermoplastic moulding materials for the production of packaging materials for foodstuffs which consist of, or are based on, vinyl chloride polymers and contain monoalkyl-tin-stabilizers.
    Type: Grant
    Filed: February 27, 1978
    Date of Patent: March 18, 1980
    Assignee: Ciba-Geigy Corporation
    Inventor: Gerd Abeler
  • Patent number: 4191682
    Abstract: Compounds having the formula ##STR1## wherein R.sub.1 and R.sub.2 are lower alkyl or together lower alkylene,R.sub.3 is hydrogen, alkyl, methoxyethyl, alkenyl, propargyl, benzyl, alkyl substituted benzyl, or acyl,R.sub.4 is alkylene, alkyl-thio-alkyl or alkyl-oxo-alkyl,M is hydrogen or a metal, and z has a value of from 1 to 4, and either(a) R.sub.5 is alkyl of 1 to 6 carbon atoms, R.sub.6 is alkyl of 1 to 6 carbon atoms, and R.sub.7 and R.sub.8 are independently hydrogen or alkyl of 1 to 5 carbon atoms, provided that R.sub.7 and R.sub.8 are not both hydrogen, or(b) R.sub.5 and R.sub.6 are together lower alkylene and R.sub.7 and R.sub.8 are independently hydrogen or alkyl of 1 to 5 carbon atoms,are good light stabilizers. The carboxylic acids are prepared for example, from 2,3,6-trimethyl-2,6-diethylpiperidin-4-ol and sebacic acid to give 2,3,6-trimethyl-2,6-diethyl-4-piperidyl hydrogen sebacate.
    Type: Grant
    Filed: June 22, 1978
    Date of Patent: March 4, 1980
    Assignee: Ciba-Geigy Corporation
    Inventors: Chester E. Ramey, John J. Luzzi
  • Patent number: 4191683
    Abstract: Derivatives of sterically hindered 4-aminopiperidines are effective as light-stabilizers for organic polymers, especially for polyolefins. The piperidine ring is substituted with at least five alkyl groups, preferably methyl and ethyl groups. The 4-amino group is substituted with mono- or divalent acyl groups. The nitrogen in 1-position may also be substituted with a monovalent organic substituent. The compounds can be synthesized starting from higher homologs of acetone in sequence of several reaction steps.
    Type: Grant
    Filed: November 21, 1977
    Date of Patent: March 4, 1980
    Assignees: Ciba-Geigy Corporation, Sankyo Company Limited
    Inventors: Heimo Brunetti, Jean Rody, Nobuo Soma, Tomoyuki Kurumada
  • Patent number: 4191829
    Abstract: Compounds having the formula ##STR1## wherein R.sub.1 and R.sub.2 are lower alkyl or cycloalkyl,R.sub.3 is hydrogen, alkyl, methoxyethyl, alkenyl, propargyl, benzyl or alkyl substituted benzyl,R.sub.4 is alkylene of 1 to 4 carbon atoms substituted with alkyl or alkenyl of 1 to 18 carbon atoms, alkenylene of 1 to 4 carbon atoms, cycloalkylene, cycloalkenylene, bicycloalkylene, bicycloalkenylene, or phenyllene,M is hydrogen or a metal, andz has a value of from 1 to 4,are good light stabilizers. The carboxylic acids are prepared for example, from 2,2,6,6-tetramethylpiperidin-4-ol and cyclohexane-1,2-dicarboxylic anhydride to give (O-mono (2,2,6,6-tetramethylpiperidin-4-ol)cyclohexane(1,2-dicarboxylate. The metal salts of the acids are readily prepared by reacting the acids or their salts with a reactive form of the metal or metal complex.
    Type: Grant
    Filed: April 25, 1978
    Date of Patent: March 4, 1980
    Assignee: Ciba-Geigy Corporation
    Inventors: Chester E. Ramey, John J. Luzzi
  • Patent number: 4190602
    Abstract: Monoacetals of aromatic diketones in which the acetal group is derived from primary mono- or dialkohols are useful as sensitizers in the photochemical polymerization or photochemical crosslinking of polymers. They are prepared from the diketones (benzils) by reaction with sulfites. The sulfites and the benzils may be formed immediately before the reaction in the same vessel without isolating these compounds. Most of the benzil monoacetals are new compounds.
    Type: Grant
    Filed: June 22, 1978
    Date of Patent: February 26, 1980
    Assignee: Ciba-Geigy Corporation
    Inventors: Jean Brunisholz, Rudolf Kirchmayr