Patents Represented by Attorney, Agent or Law Firm James P. Barr
  • Patent number: 4948513
    Abstract: A novel polymer and treatment scenario which considerably improves detackification of paint overspray consisting of high solids enamel, epoxy resin, or polyurethanes in the wash water or paint spray booths is disclosed comprised of:(i) a hydrophilic-lipophilic copolymer in combination with a modified tannin and/or(ii) a diallyldimethylammonium chloride polymer in combination with a modified tannin.
    Type: Grant
    Filed: May 27, 1988
    Date of Patent: August 14, 1990
    Assignee: W. R. Grace & Co.-Conn.
    Inventor: David B. Mitchell
  • Patent number: 4946681
    Abstract: A process for the production of stable azadirachtin solutions comprising extracting ground neem seeds with a solvent having azadirachtin solubility to produce an aqueous-containing azadirachtin extract solution and then adding an effective amount of 3-4 Angstrom molecular sieves to selectively remove water from the extract to yield a storage-stable azadirachtin solution having less than 5% water by volume.
    Type: Grant
    Filed: June 26, 1989
    Date of Patent: August 7, 1990
    Assignee: W. R. Grace & Co.-Conn.
    Inventor: James F. Walter
  • Patent number: 4913825
    Abstract: A novel treatment scenario which considerably improves detackification of paint overspray consisting of undiluted high solids enamel, epoxy resin or polyurethanes in the wash water of paint spray booths is disclosed, comprised of (i) a dialkylamine-epihalohydrin in combination with a modified tannin and/or (ii) a dialkylamine epihalohydrin in combination with a melamine formaldehyde type polymer.
    Type: Grant
    Filed: May 27, 1988
    Date of Patent: April 3, 1990
    Assignee: W. R. Grace & Co.-Conn.
    Inventor: David B. Mitchell
  • Patent number: 4911887
    Abstract: The cyclic ether bis-phosphonic acids diphosphonotetrahydrofuran, diphosphonotetrahydropyran, and diphosphonooxepane and their salts and esters are disclosed, as is their use in water treatment. Also disclosed is the preparation of the cyclic ether bis-phosphonic acid compounds by reacting a corresponding dialkoxy cyclic ether with certain dialkyl phosphites, reacting the intermediate formed therefrom with certain halotrimethyl silanes, organic acid halides or inorganic acid halides, and reacting the intermediate formed therefrom with certain trialkyl phosphites to form a bis-phosphonic acid compound which may be hydrolized to form the cyclic ether bis-phosphonic acid. Certain of the first intermediates are considered stable reagents which may be used for preparing flame retardants, chelating agents and corrosion inhibitors.
    Type: Grant
    Filed: November 9, 1988
    Date of Patent: March 27, 1990
    Assignee: W. R. Grace & Co.-Conn.
    Inventor: Charles G. Carter
  • Patent number: 4904393
    Abstract: A composition and method for detackifying paint spray booth water containing particles from paint spray is disclosed which uses a reaction product of an aldehyde with either a urea or an aminotriazine or both, and at least one of;(i) a hydrolyzed polyacrylamide;(ii) certain modified tannins in further combination with diallyldialkyl quaternary ammonium polymers or polymers derived by reacting certain dialkylamines with epihalohydrins.
    Type: Grant
    Filed: May 27, 1988
    Date of Patent: February 27, 1990
    Assignee: W. R. Grace & Co.-Conn.
    Inventors: David B. Mitchell, Thomas P. Curran
  • Patent number: 4898988
    Abstract: A process for the preparation of .beta.-hydroxyketones comprising the catalytic hydrogenolysis of an aqueous solution of isoxazolines having the formula ##STR1## in a fixed bed reactor containing a transition metal catalyst at a temperature between 20.degree. to 150.degree. C. and a pressure from about 0 to 150 psig; wherein R.sub.1 and R.sub.2 are independently selected from hydrogen, alkyl, cycloalkyl or aromatic group and wherein the aqueous solution of isoxazolines is substantially free of acids or buffers.
    Type: Grant
    Filed: March 13, 1989
    Date of Patent: February 6, 1990
    Assignee: W. R. Grace & Co.-Conn.
    Inventors: You-Jyh Lin, Harold Kloczewski
  • Patent number: 4895971
    Abstract: This invention relates to the production of iminodiacetonitrile, and more specifically to an integrated process wherein a crude, unpurified reactor gas stream from a hydrogen cyanide reactor and optionally, a crude, unpurified reactor gas stream from a formaldehyde process reactor are fed directly to a reactive absorber together with additional ammonia and acidified water to produce iminodiacetonitrile in high yields. This process provides improved economics for producing iminodiacetonitrile by eliminating costly intermediate recovery and purification processes associated with conventional hydrogen cyanide and formaldehyde production processes.
    Type: Grant
    Filed: October 31, 1988
    Date of Patent: January 23, 1990
    Assignee: W. R. Grace & Co.-Conn.
    Inventors: Jow-Lih Su, Martin B. Sherwin
  • Patent number: 4869889
    Abstract: A process for the production of hydrogen cyanide which comprises combining methanol ammoxidation with formamide decomposition in the same reactor, using a metal oxide catalyst. This process generally involves forming a gaseous reaction mixture comprising methanol, formamide, ammonia, oxygen and optionally formaldehyde. This reaction mixture is then passed over the metal oxide catalyst at a temperature in the range 200.degree. to 600.degree. and a pressure in the range 5 to 20 psig.
    Type: Grant
    Filed: March 23, 1989
    Date of Patent: September 26, 1989
    Assignee: W. R. Grace & Co.-Conn.
    Inventors: Martin B. Sherwin, Jow-Lih Su
  • Patent number: 4861925
    Abstract: A process for the preparation of nitroolefins which comprises heating a solution of a nitroalcohol of the formula: ##STR1## to at least 125.degree. C. to give a corresponding nitroolefin which is contacted in situ with nucleophilic addition reagent.
    Type: Grant
    Filed: July 15, 1988
    Date of Patent: August 29, 1989
    Assignee: W. R. Grace & Co.-Conn.
    Inventor: Jennifer M. Quirk