Patents Examined by Bernard Helfin
  • Odorant and/or flavoring substances
    Patent number: 4482762
    Abstract: The invention is concerned with compounds of the formula: ##STR1## wherein one of the symbols R.sup.1, R.sup.2 and R.sup.3 stands for methyl or ethyl and the others stand for hydrogen and R.sup.4 signifies hydrogen or methyl, with the proviso that R.sup.4 represents hydrogen when R.sup.1 and R.sup.2 both represent hydrogen and R.sup.3 represents methyl and their use as odorants and flavorants.
    Type: Grant
    Filed: July 16, 1981
    Date of Patent: November 13, 1984
    Assignee: Givaudan Corporation
    Inventors: Roman Kaiser, Dietmar Lamparsky
  • Process for the preparation of hydroxybenzaldehydes
    Patent number: 4481374
    Abstract: The invention relates to a process for the preparation of hydroxybenzaldehydes by oxidation of hydroxybenzylic alcohols through oxygen or oxygen-containing gas, said process being carried out in aqueous alkaline medium in the absence of any catalyst whatsoever, at a temperature comprised between 25.degree. and 50.degree. C. and in the presence of an alkaline hydroxide in such a quantity that the molar ratio of alkaline hydroxide to hydroxybenzylic alcohol used is comprised between 2.25 and 10.
    Type: Grant
    Filed: August 26, 1982
    Date of Patent: November 6, 1984
    Assignee: Societe Francaise Hoechst
    Inventors: Yani Christidis, Jean-Claude Vallejos
  • High viscosity polyoxyalkylene glycol block copolymers and method of making the same
    Patent number: 4481367
    Abstract: A high molecular weight, high viscosity liquid, water soluble polyoxyalkylene block copolymer suitable as a functional fluid is provided having the formula ##STR1## wherein Q is the organic residue from an organic diisocyanate; x is an integer in the range of about 1 to 10; R.sup.1 and R.sup.2 are hydrogen, methyl, ethyl, or mixtures thereof with the proviso that the overall content of species wherein R.sup.1 and R.sup.2 are hydrogen must be at least 50 percent by weight; R.sup.3 and R.sup.4 are organic residues resulting from the removal of terminal hydrogen atoms from difunctional polyols; y and z are integers representing the polyether blocks in said copolymer and the sum of which must be from about 1.05 to 2.0 times the value of x; and n, m, r, and s are integers wherein n=m and r=s and the sums n+m and r+s are each in the range of 8 to 250.
    Type: Grant
    Filed: November 22, 1983
    Date of Patent: November 6, 1984
    Assignee: Union Carbide Corporation
    Inventor: Robert J. Knopf
  • Substituted carbanilic acid esters and herbicidal composition containing same
    Patent number: 4479822
    Abstract: A substituted carbanilic acid ester of the formula ##STR1## wherein R.sub.1 is C.sub.1 -C.sub.6 -alkyl, C.sub.2 -C.sub.6 -alkenyl, C.sub.2 -C.sub.6 -alkinyl, chlorinated C.sub.1 -C.sub.6 -alkyl or phenyl-C.sub.1 -C.sub.5 -alkyl, R.sub.2 is hydrogen or chlorine, R.sub.3 is hydrogen or C.sub.1 -C.sub.6 -alkyl, R.sub.4 is hydrogen, C.sub.1 -C.sub.6 -alkyl or phenyl which latter may also be substituted, R.sub.5 is halogen, and R.sub.6 is hydrogen or halogen. The compounds of the invention have a surprisingly high compatibility with rice, wheat, barley, oats, rye, and agricultural grasses when applied in a postemergence procedure. They also have a high activity against weeds of various resistant genera.
    Type: Grant
    Filed: August 10, 1982
    Date of Patent: October 30, 1984
    Assignee: Schering Aktiengesellschaft
    Inventors: Friedrich Arndt, Heinrich Franke, Erich Schmidt, Reinhold Puttner
  • Process for the preparation of urethanes
    Patent number: 4480110
    Abstract: A process for the preparation of N,O-disubstituted urethanes. A substituted urea, an alcohol and a compound taken from the group consisting of N-unsubstituted urethanes, urea, polyurets and mixtures thereof at a temperature of 120.degree.-350.degree. C. The urethanes prepared by this process are particularly suitable for the preparation of isocyanates.
    Type: Grant
    Filed: January 9, 1984
    Date of Patent: October 30, 1984
    Assignee: Bayer Aktiengesellschaft
    Inventors: Peter Heitk/a/ mper, Rudolf Fauss, Kurt Findeisen, Stefan Penninger, Hans-Joachim Scholl
  • Process for the manufacture of nitrophenetoles
    Patent number: 4479015
    Abstract: The present invention relates to a process for the manufacture of ortho - or para-nitrophenetole. According to the invention, the respective nitrochlorobenzene is reacted with ethanol and alkali hydroxide in the presence of a catalyst system which comprises a tetramethylammonium salt of a general formula (CH.sub.3).sub.4 NX, wherein X is Cl.sup.-, Br.sup.-, HSO.sub.4.sup.- or OC.sub.2 H.sub.5, and an aqueous phase. The process has several advantages such as high yields and purity, the products obtained being completely free of side reaction products such as azoxy compounds.
    Type: Grant
    Filed: January 7, 1983
    Date of Patent: October 23, 1984
    Assignee: GADOT, Petrochemical Industries, Ltd.
    Inventors: Yoel Sasson, Shmuel Zbaida
  • Preparation of N-substituted carbamates
    Patent number: 4476316
    Abstract: N-Substituted carbamates are prepared by reacting a carbamate with an olefin in the presence of a cation exchanger containing sulfonic acid groups and of from 0.1 to 50 g of an alcohol per mole of starting material II.The N-substituted carbamates obtainable by the process of the invention are active ingredients and useful starting materials for the preparation of dyes, pesticides and drugs.
    Type: Grant
    Filed: January 19, 1983
    Date of Patent: October 9, 1984
    Assignee: BASF Aktiengesellschaft
    Inventors: Franz Merger, Gerhard Nestler
  • Process for producing 3,3,3-trifluoropropyl substituted phenol
    Patent number: 4476328
    Abstract: A novel trifluoropropyl derivative of mono-substituted benzene represented by the general formula: ##STR1## wherein R is halogen atom, hydroxy, trifluoromethyl, n-octyl, n-dodecyl, or phenoxy group not substituted or mono-substituted by 3,3,3-trifluoropropyl group, and n is an integer of 1, 2 or 3, with the proviso that the total number of 3,3,3-trifluoropropyl group of the derivative of mono-substituted benzene is at most 3, and a process for producing the derivative of mono-substituted benzene.
    Type: Grant
    Filed: November 12, 1981
    Date of Patent: October 9, 1984
    Assignee: Kureha Kagaku Kogyo Kabushiki Kaisha
    Inventors: Yoshiro Kobayashi, Itsumaro Kumadaki, Masaaki Takahashi, Takashi Yamauchi
  • Process for the production of methylenedicarbanilates
    Patent number: 4476317
    Abstract: A process is described for producing methylenedicarbanilates by reacting carbanilates with formaldehyde in the presence of a specific catalyst. The catalyst is selected from (1) a cation exchanger containing sulfonic acid groups which has a proton exchange capacity of at least 0.1 meq/g, (2) a clay having an acidity of at least 0.1 meq/g at an acidic site, the acid strength of the acidic site being -3.0 or less as a value of acidity function H.sub.o, (3) a mixed oxide having an acidity of at least 0.1 meq/g at an acidic site, the acid strength of the acidic site being -3.0 or less as a value of acidity function H.sub.o, (4) heteropolymolybdic acid, and (5) heteropolytungstic acid.
    Type: Grant
    Filed: January 17, 1983
    Date of Patent: October 9, 1984
    Assignee: Mitsubishi Chemical Industries Limited
    Inventor: Keisuke Wada
  • Purification of vanillin
    Patent number: 4474994
    Abstract: Crude vanillin is purified by supercritical extraction of impurities. The process is especially useful in purifying crude vanillin obtained from paper mill waste liquors. Preferred supercritical extraction fluid is CO.sub.2.
    Type: Grant
    Filed: September 13, 1982
    Date of Patent: October 2, 1984
    Assignee: Monsanto Company
    Inventor: Earle C. Makin
  • Method for the hydrolysis of .alpha.-chlorinated toluene compounds
    Patent number: 4474993
    Abstract: The disclosure relates to a continuous method and an apparatus for the hydrolysis of .alpha.-chlorinated toluene compounds, preferably benzyl chloride. The hydrolysis, which takes place in a hydrolysis zone, is characterized by being conducted in countercurrent between the aqueous phase containing the hydrolyzing agent and the organic phase containing the .alpha.-chlorinated toluene compound and an inert organic solvent, such as toluene. After the hydrolysis, the organic phase is washed with water in a washing zone, while the aqueous phase is extracted with inert solvent in an extraction zone. The resulting product of hydrolysis, preferably benzyl alcohol, is thereafter separated from the organic phase by distillation, suitably in two stages, by means of two distillation columns connected in series.
    Type: Grant
    Filed: April 28, 1982
    Date of Patent: October 2, 1984
    Inventors: Goran L. F. Hag, Risto K. Rantala
  • Hydrolysis of aryl-aliphatic ethers
    Patent number: 4473713
    Abstract: At least one of the other functions comprising an aryl-aliphatic ether, e.g., veratrol, is catalytically hydrolyzed with water, e.g., to guaiacol, in the presence of a catalytically effective amount of a salt of a carboxylic acid.
    Type: Grant
    Filed: September 27, 1982
    Date of Patent: September 25, 1984
    Assignee: Rhone-Poulenc Specialites Chimiques
    Inventor: Serge Ratton
  • Preparation of aromatic aldehydes
    Patent number: 4471140
    Abstract: Aromatic aldehydes are formed by the liquid phase reaction of molecular oxygen with methyl-substituted aromatic compounds in the presence of base, a cobalt, manganese, chromium or nickel salt catalyst and an easily removable amine.
    Type: Grant
    Filed: August 19, 1982
    Date of Patent: September 11, 1984
    Assignee: The Dow Chemical Company
    Inventor: Andrew T. Au
  • Process for the production of aromatic carbamates
    Patent number: 4469882
    Abstract: A process for producing aromatic carbamates in high yield is described, which comprises reacting aromatic nitro compounds, organic compounds containing a hydroxy group, and carbon monoxide in the presence of a catalyst comprising: (1) a platinum group metal or its compound, (2) metallic vanadium or its compound, (3) metallic iron or its compound, (4) a halogen atom, and (5) a tertiary amine, wherein the amount of each component used and the composition are adjusted within specific ranges.
    Type: Grant
    Filed: June 23, 1982
    Date of Patent: September 4, 1984
    Assignee: Mitsubishi Chemical Industries Limited
    Inventors: Tsutomu Takeuchi, Mineo Nishi, Toshio Irie, Hirotaka Ryuto
  • Process for preparing monoalkylethers of hydroquinone and its derivatives
    Patent number: 4469897
    Abstract: A method for preparing monoalkylethers of hydroquinone and of substituted hydroquinones of general formula ##STR1## in which R is an alkyl group and R.sub.1 is hydrogen or an alkyl group, wherein a hydroquinone compound of general formula ##STR2## is reacted with an alcohol or formula R-OH in the presence of transition metal salts, either in the presence or in the absence of air or oxygen.
    Type: Grant
    Filed: October 21, 1981
    Date of Patent: September 4, 1984
    Assignee: Anic S.p.A.
    Inventors: Franco Rivetti, Ugo Romano, Nicola Di Muzio
  • Process for preparation of hydroxybenzaldehydes
    Patent number: 4469894
    Abstract: In a Reimer-Tiemann reaction for the preparation of a mixture of salicylaldehyde and p-hydroxybenzaldehyde, improved yield of the product and high selectivity of salicylaldehyde can be obtained when an alkali metal salt of a phenol is reacted with a reaction mixture comprised of chloroform and a slurry of an alkali metal hydroxide (preferably, in a fine powder state thereof) and an inert organic solvent and optionally, a catalytic amount of a surfactant.
    Type: Grant
    Filed: June 16, 1982
    Date of Patent: September 4, 1984
    Assignee: Sumitomo Chemical Co., Ltd.
    Inventors: Kazuhiko Hamada, Gohfu Suzukamo
  • Method for the preparation of nitrodiphenyl ethers
    Patent number: 4469893
    Abstract: Diphenyl esters of the formula ##STR1## wherein R is hydrogen, carboxy, carboxylate salt or ester, formyl, cyano, alkyl, alkoxy, chloro, bromo, or N, N-dialkyl amino, are prepared by reacting a chloro-fluoro-benzotrifluoride with a nitro-phenoxide of the formula ##STR2## where R is defined above, and M is a cation of an alkali metal or an alkaline earth metal.
    Type: Grant
    Filed: March 22, 1982
    Date of Patent: September 4, 1984
    Assignee: Occidental Chemical Corporation
    Inventors: David Y. Tang, Byron R. Cotter, Frederick J. Goetz
  • Fluorinated alcohols
    Patent number: 4468527
    Abstract: A fluoroaliphatic radical- and aliphatic chlorine-containing alcohol containing more than 25 weight percent carbon-bonded fluorine in the form of fluoroaliphatic radicals and at least one aliphatic chlorine, an ester of said alcohol and a carboxycylic acid being useful in the treatment of carpet.
    Type: Grant
    Filed: March 15, 1982
    Date of Patent: August 28, 1984
    Assignee: Minnesota Mining and Manufacturing Company
    Inventor: Kalyanji U. Patel
  • Process for the production and purification of 2,4,4'-trichloro-2'-hydroxydiphenylether
    Patent number: 4467117
    Abstract: An improved synthesis of the bacteriostat 2,4,4'-trichloro-2'-hydroxydiphenylether is disclosed wherein the hydrolysis after diazotization is carried out at 175.degree.-180.degree. C. to increase the yield and reaction rate. The hydrolyzed product is distilled after neutralization to remove the major portion of undesirable colored products and phenolics. The distillate is then extracted with tetrachlorethylene to separate the product from non-phenolic by-products including the 25-28% 2,4,8-trichlorodibenzofuran which are present. The final product of the process then meets F.D.A. and commercial standards for use in soaps and cosmetics.
    Type: Grant
    Filed: February 7, 1983
    Date of Patent: August 21, 1984
    Assignee: Ciba-Geigy Corporation
    Inventors: Richard B. Lund, Glenn W. Brown
  • Process of hydroxylation of an aromatic carbonyl compound
    Patent number: 4465864
    Abstract: An aromatic compound is hydroxylated by reacting the aromatic compound in an aqueous solvent with a triiodide salt to form a reaction mixture containing the corresponding iodoaromatic compound. The mixture is reacted, without separating the iodoaromatic compound, with a hydroxylating agent to form the corresponding hydroxy aromatic compound. The iodide salt, formed as a by-product of the reaction, is then separated for reuse in the process.
    Type: Grant
    Filed: August 2, 1982
    Date of Patent: August 14, 1984
    Assignee: International Telephone and Telegraph Corporation
    Inventors: Geoffrey K. Cooper, Lewis G. Harruff