Patents Assigned to Ethyl Corporation
  • Vapor pressure measurement by gas saturation for mixture
    Patent number: 5327779
    Abstract: Disclosed herein is an apparatus and process for determining the vapor pressure of materials in a mixture at relatively low vapor pressures by a gas saturation procedure. The process comprises passing an inert gas over a sampled material at a controlled flow rate to create a vapor of the sampled materials that may be collected and analyzed. Of particular importance, this method and apparatus provides a means of collecting vaporized samples over an extended period of time and, therefore, allows even minor components of mixtures to be considered in the final vapor pressure analysis. The apparatus also includes a means for determining whether sampled material has progressed as vapor beyond the means of collecting the sampled material.
    Type: Grant
    Filed: September 24, 1992
    Date of Patent: July 12, 1994
    Assignee: Ethyl Corporation
    Inventors: Robert N. Sanders, Robin P. McCarthy
  • Process for a decarbromodiphenylethane predominate product having enhanced whiteness
    Patent number: 5324874
    Abstract: This invention relates to an improvement in a process for preparing a product predominant in decabromodiphenylethane. In the improved process the diphenylethane is reacted with bromine in the presence of bromination catalyst in a reaction vessel by feeding diphenylethane to the reaction vessel below the liquid level of bromine in the reaction vessel. The improvement comprises contacting diphenylethane, bromine, and catalyst at a rate sufficient to obtain a diphenylethane predominant product having enhanced color and particle size.
    Type: Grant
    Filed: August 17, 1992
    Date of Patent: June 28, 1994
    Assignee: Ethyl Corporation
    Inventors: George H. Ransford, Phillip R. DeVrou, John C. Parks
  • Catalytic carboxylation process for preparing aryl-substituted aliphatic carboxylic esters
    Patent number: 5322959
    Abstract: A new process for preparing aryl substituted aliphatic carboxylic acid esters is provided. A 1-aryl substituted aliphatic halo compound is reacted with carbon monoxide in the presence of an alcohol in anhydrous conditions at a temperature between about 25.degree. C. and about 200.degree. C. An excess of several moles of anhydrous alcohol is preferred. An acid such as hydrochloric acid may also be added. As catalyst, a mixture of palladium or a palladium compound and a copper compound with at least one acid-stable ligand are present.
    Type: Grant
    Filed: May 11, 1993
    Date of Patent: June 21, 1994
    Assignee: Ethyl Corporation
    Inventor: Tse-Chong Wu
  • Product recovery tube assembly
    Patent number: 5322670
    Abstract: A product withdrawal tube for use in a fluidized bed reactor is disclosed. The tube features a plurality of elongated tubular segments which are fitted together to obtain flexible and sealing engagement between the segments whereby the tube is durable despite the vibrations and shocks experienced by it due to the operation of the fluidized bed reactor.
    Type: Grant
    Filed: October 20, 1992
    Date of Patent: June 21, 1994
    Assignee: Ethyl Corporation
    Inventors: Jameel Ibrahim, Robert E. Farritor
  • Catalytic carbonylation of ethers and thioethers
    Patent number: 5315030
    Abstract: A new process for preparing aliphatic carboxylic acid esters is provided. A substituted aliphatic ether or thioether compound is reacted with carbon monoxide in the presence of an alcohol in anhydrous conditions at a temperature between about 25.degree. C. and about 200.degree. C. An excess of several moles of anhydrous alcohol is preferred. An acid such as hydrochloric acid may also be added. As catalyst, a mixture of palladium or a palladium compound and a copper compound with at least one acid-stable ligand are present.
    Type: Grant
    Filed: September 29, 1993
    Date of Patent: May 24, 1994
    Assignee: Ethyl Corporation
    Inventors: Kannappan Chockalingam, Tse-Chong Wu
  • Process for preparing aryl-substituted aliphatic carboxylic acids and their esters using cyclic phosphine catalysts
    Patent number: 5315026
    Abstract: A catalytic process for preparing aryl substituted aliphatic carboxylic acid esters is disclosed. A 1-aryl substituted olefinic compound is reacted with carbon monoxide in the presence of an alcohol in anhydrous conditions at a temperature between about 25.degree. C. and about 200.degree. C. An excess of several moles of anhydrous alcohol is preferred. An acid such as hydrochloric acid may also be added. As catalyst, a mixture of a palladium compound and a copper compound is used with at least one acid-stable cyclic phosphine having the formula: ##STR1## where R' is the same or different than R" and is alkyl or aryl, said aryl, either substituted or unsubstituted, and Ar' is phenyl, naphthyl, substituted phenyl or substituted naphthyl and n is an integer from 3 to 6.
    Type: Grant
    Filed: September 29, 1993
    Date of Patent: May 24, 1994
    Assignee: Ethyl Corporation
    Inventor: Tse-Chong Wu
  • Olefinic process for preparing aryl-substituted aliphatic carboxylic esters
    Patent number: 5315028
    Abstract: A new process for preparing aryl substituted aliphatic carboxylic acid esters is provided. A 1-aryl substituted olefinic compound is reacted with carbon monoxide in the presence of an alcohol in anhydrous conditions at a temperature between about 25.degree. C. and about 200.degree. C. An excess of several moles of anhydrous alcohol is preferred. An acid such as hydrochloric acid may also be added. As catalyst, a mixture of a palladium compound and a copper compound with at least one acid-stable ligand are present.
    Type: Grant
    Filed: May 12, 1993
    Date of Patent: May 24, 1994
    Assignee: Ethyl Corporation
    Inventor: Tse-Chong Wu
  • Poultry feed component
    Patent number: 5314700
    Abstract: New methods and feed compositions are disclosed for enhancing the reduction of coccidial-induced intestinal lesions in poultry and for enhancing shank pigmentation in poultry. Such methods comprise coadministering zeolite and coccidiostats, such as in a feed mixture or by separate administration.
    Type: Grant
    Filed: January 28, 1991
    Date of Patent: May 24, 1994
    Assignee: Ethyl Corporation
    Inventors: Dewey G. Barnes, Sebastian M. Laurent
  • Catalytic process for preparing the alkyl esters of ibuprofen
    Patent number: 5315027
    Abstract: A process for preparing alkyl esters of ibuprofen is provided. A 1-halo-1-(4-isobutylphenyl)ethane is reacted in an anhydrous medium with carbon monoxide in the presence of an alkoxide source at a temperature between about 10.degree. C. and about 200.degree. C. An excess of several moles of alcohol is preferred. An acid such as hydrogen chloride may also be added. As catalyst, a palladium compound having at least one acid-stable ligand is present; however, an excess of ligand over palladium is advantageous.
    Type: Grant
    Filed: May 11, 1993
    Date of Patent: May 24, 1994
    Assignee: Ethyl Corporation
    Inventors: Thanikavelu Manimaran, Tse-Chong Wu, Felix M. Orihuela
  • Process for preparing aryl-substituted aliphatic carboxylic acid esters by carbonylation
    Patent number: 5315029
    Abstract: A new process for preparing alkyl esters of ibuprofen is provided. A 1-halo-1-(4-isobutylphenyl)ethane is reacted with carbon monoxide in the presence of an anhydrous alcohol at a temperature between about 10.degree. C. and about 200.degree. C. An excess of several moles of alcohol is preferred. An acid such as trifluoroacetic acid is also added. As catalyst, a palladium compound and at least one acid-stable ligand over palladium are present; however, an excess of ligand over palladium is advantageous.
    Type: Grant
    Filed: May 11, 1993
    Date of Patent: May 24, 1994
    Assignee: Ethyl Corporation
    Inventor: Kannappan Chockalingam
  • Heterogeneous methylaluminoxane catalyst system
    Patent number: 5308815
    Abstract: A heterogeneous catalyst composition comprising a primary catalyst such as a metallocene and a methylaluminoxane, at least about 10 percent but less than about 40 percent of the total aluminum value in the methylaluminoxane being soluble in toluene at 25.degree. C.
    Type: Grant
    Filed: September 1, 1992
    Date of Patent: May 3, 1994
    Assignee: Ethyl Corporation
    Inventor: Samuel A. Sangokoya
  • Valve
    Patent number: 5305985
    Abstract: An improved valve of the flapper plate type is disclosed, the valve comprising at least one flexible member for connecting the flapper plate and the arm actuating the flapper. The flexible member absorbs impact energy and allows restricted three dimensional movement of the flapper plate. The seals for the flapper plate and the seat comprise electrically conductive sealing materials.
    Type: Grant
    Filed: April 30, 1993
    Date of Patent: April 26, 1994
    Assignee: Ethyl Corporation
    Inventors: Richard J. Fendley, Linda M. White, James R. Meyer
  • Asymmetric hydrogenation of aromatic-substituted olefins using organoruthenium catalyst
    Patent number: 5304524
    Abstract: A process for the asymmetric reduction of carboxylic acids of the formula ##STR1## or the amine salts thereof, where R and R.sub.1 are the same or different and are hydrogen, alkyl, cycloalkyl or haloalkyl and Ar is aryl or substituted aryl is disclosed.
    Type: Grant
    Filed: October 8, 1992
    Date of Patent: April 19, 1994
    Assignee: Ethyl Corporation
    Inventors: W. Dirk Klobucar, Charles H. Kolich, Thanikavelu Manimaran, Tse-Chong Wu
  • Process for decarbromodiphenylalkane predominant product
    Patent number: 5302768
    Abstract: This invention relates to a process for preparing a white or at least near white product which is predominant in decabromodiphenylalkane, and which contains a minor amount of dodecabromodiphenylalkane.
    Type: Grant
    Filed: March 2, 1992
    Date of Patent: April 12, 1994
    Assignee: Ethyl Corporation
    Inventor: Saadat Hussain
  • Acetic acid derivatives and their production
    Patent number: 5302752
    Abstract: Compounds of formula ##STR1## where n is an integer from 1 to 12, R and R.sub.1 are the same or different and are hydrogen or C.sub.1 to C.sub.6 linear or branched alkyl as well as their physiologically active salts and amides thereof and the enantiomers, mixtures and racemates are disclosed. Intermediates useful in preparing the above compounds are also disclosed as are processes for preparing these compounds.
    Type: Grant
    Filed: April 16, 1990
    Date of Patent: April 12, 1994
    Assignee: Ethyl Corporation
    Inventor: G. Patrick Stahly
  • Profen resolution
    Patent number: 5302751
    Abstract: A process is disclosed that is useful for separating the enantiomers of a racemic mixture of an aliphatic carboxylic acid having the formula ##STR1## where R.sub.1 is hydrogen or alkyl, R.sub.2, R.sub.3 and R.sub.4 are independently different and are hydrogen, alkyl, cycloalkyl, alkenyl, alkynyl, phenyl, substituted phenyl, naphthyl, substituted naphthyl, heteroaryl, substituted heteroaryl, haloalkyl, alkoxyalkyl, alkylthioalkyl, phenylalkyl, substituted phenylalkyl, heteroalkylalkyl, substituted heteroalkylalkyl or cycloalkylalkyl.
    Type: Grant
    Filed: January 21, 1992
    Date of Patent: April 12, 1994
    Assignee: Ethyl Corporation
    Inventors: Thanikavelu Manimaran, Alicia A. Potter
  • Method for DMTDA production
    Patent number: 5302755
    Abstract: Thioalkylated aromatic amines are prepared by reacting a mixture of an aromatic amine, an organic disulfide and a Lewis acid or organometallic catalyst to form a product mixture and adding to said product mixture a poly(oxyalkylene)polymer or by reacting a mixture of an aromatic amine, an organic disulfide and a Lewis acid or organometallic catalyst in the presence of a poly(oxyalkylene)polymer for the purpose of easy handling of the catalyst residue for recycling.
    Type: Grant
    Filed: October 29, 1992
    Date of Patent: April 12, 1994
    Assignee: Ethyl Corporation
    Inventors: Robert A. Schaerfl, Jr., Gordon G. Knapp, W. Dirk Klobucar
  • Silver protective lubricant composition
    Patent number: 5302304
    Abstract: A method of protecting silver parts and inhibiting copper corrosion in an internal combustion engine and a silver-wear and copper-corrosion protection additive in a lubricating composition comprising a major proportion of an oil of lubricating viscosity and a minor amount of a silver-wear and copper-corrosion protection additive comprising the reaction product of an amine, formic acid, and a C.sub.5 to C.sub.60 carboxylic acid.
    Type: Grant
    Filed: March 5, 1992
    Date of Patent: April 12, 1994
    Assignee: Ethyl Corporation
    Inventor: Joseph J. Valcho
  • Ultrasonic cyano-de-halogenation
    Patent number: 5302263
    Abstract: A process for obtaining an aryl-substituted aliphatic nitrile is described. The process utilizes a solution of an aryl-substituted aliphatic halide and an organic or inorganic cyanide substantially insoluble in the solution. The mixture is subjected to ultrasonic vibrations for a time and at a temperature sufficient to produce the aryl-substituted aliphatic nitrile.
    Type: Grant
    Filed: April 29, 1993
    Date of Patent: April 12, 1994
    Assignee: Ethyl Corporation
    Inventor: Thanikavelu Manimaran
  • Preparation of metallocenes
    Patent number: 5302733
    Abstract: A racemic mixture of a chiral, silicon bridged transition metal metallocene, which is substantially free of meso isomer, is precipitated directly from a reaction mixture as it is formed by reacting an organic solvent solution of an alkali metal salt of a silicon bridged ligand with a transition metal tetrahalide-ether complex.
    Type: Grant
    Filed: March 30, 1992
    Date of Patent: April 12, 1994
    Assignee: Ethyl Corporation
    Inventors: Steven P. Diefenbach, Meng-Sheng Ao, John M. Power, Jamie R. Strickler