Abstract: A method for producing 4-acetoxystyrene by heating 4-acetoxyphenylmethylcarbinol, with an acid catalyst, at a temperature of from about 85.degree. C. to about 300.degree. C. under a pressure of from about 0.1 mm HgA to about 760 mm HgA for from about 0.2 minutes to about 10 minutes. The process also provides for the solventless (neat) hydrogenation of 4-acetoxyacetophenone to produce 4-acetoxyphenylmethylcarbinol. The reaction proceeds by heating at 54.degree. C. to 120.degree. C. with an excess of hydrogen in the presence of a Pd/C or activated nickel such as Raney Nickel catalyst in the absence of a solvent. The 4-acetoxyphenylmethylcarbinol may then be dehydrated to 4-acetoxystyrene. The later may be polymerized to poly(4-acetoxystyrene) and hydrolyzed to poly(4-hydroxystyrene).
Type:
Grant
Filed:
June 10, 1993
Date of Patent:
December 28, 1993
Assignee:
Hoechst Celanese Corporation
Inventors:
Bakulesh N. Shah, Dung Q. Tran, Donna L. Keene
Abstract: The present invention provides liquid, destructible fluorinated nonionic surfactants that are water-soluble or dispersible, that are useful as stabilizers for emulsions, and that on curing as a layer on a substrate can provide the substrate with an oil- and water-repellent coating that is free of surfactant, the destructible surfactant comprising a fluorocarbylalkoxysilane having at least one polyfluorinated aliphatic group that is both hydrophobic and oleophobic and at least one, preferably two, polyoxyalkylene or other hydrophilic groups which can be cleaved from the hydrophobe by hydrolysis. More particularly, a fluorocarbylalkoxysilane comprises at least one polyfluorinated aliphatic group and at least one polyoxyalkylene group or other hydrophilic group, said fluorocarbylalkoxysilane being destructible by hydrolysis.
Type:
Grant
Filed:
February 18, 1993
Date of Patent:
December 28, 1993
Assignee:
Minnesota Mining and Manufacturing Company
Abstract: An alkali metal sulfonate-substituted binaphthyl-phosphine transition metal complex is disclosed, which is represented by formula (I)[M(X).sub.n (Q)(SO.sub.3 A-BINAP)]Y (I)whereinM represents a transition metal atom;SO.sub.3 A-BINAP represents a tertiary phosphine represented by formula (II) ##STR1## in which A represents an alkali metal atom; X represents a chlorine atom, a bromine atom, or an iodine atom;when n is 1, M represents ruthenium, Q represents benzene or p-cymene, and Y represents a chlorine atom, a bromine atom, or an iodine atom;when n is 0 and M is iridium or rhodium, Q represents 1,5-cyclo-octadiene or norbornadiene, and Y represents ClO.sub.4, PF.sub.6 or BF.sub.4 ; andwhen n is 0 and M is palladium, Q represents .pi.-allyl, and Y represents ClO.sub.4, PF.sub.6, or BF.sub.4.
Abstract: A method for producing 4-acetoxystyrene by heating 4-acetoxyphenylmethylcarbinol, with an acid catalyst, at a temperature of from about 85.degree. C. to about 300.degree. C. under a pressure of from about 0.1 mm HgA to about 760 mm HgA for from about 0.2 minutes to about 10 minutes. The process also provides for the solventless (neat) hydrogenation of 4-acetoxyacetophenone to produce 4-acetoxyphenylmethylcarbinol. The reaction proceeds by heating at 54.degree. C. to 120.degree. C. with an excess of hydrogen in the presence of a Pd/C or activated nickel such as Raney Nickel catalyst in the absence of a solvent. The 4-acetoxyphenylmethylcarbinol may then be dehydrated to 4-acetoxystyrene. The later may be polymerized to poly(4-acetoxystyrene) and hydrolyzed to poly(4-hydroxystyrene).
Type:
Grant
Filed:
June 10, 1993
Date of Patent:
December 28, 1993
Assignee:
Hoechst Celanese Corporation
Inventors:
Bakulesh N. Shah, Dung Q. Tran, Donna L. Keene
Abstract: Liquid or gel dishwashing detergent compositions containing alkyl amphocarboxylic acid and magnesium or calcium ions for improved stability, sudsing and grease cleaning are described. Stable liquid detergent compositions containing alkyl amphodicarboxylic acid, and magnesium ions are preferred.
Abstract: An .alpha., .beta.-unsaturated carboxylic acid is produced by catalytically reacting an .alpha.-hydroxycarboxylic acid amide of the formula (1), ##STR1## where R.sub.1 and R.sub.2 are independently selected from the group consisting of hydrogen and C.sub.1 -C.sub.4 alkyl groups, provided that at least one of R.sub.1 and R.sub.2 is the alkyl group, with water in the presence of a solid acid catalyst containing a high surface area rare earth phosphate anhydride having the monoclinic system structure producible by heating a rare earth phosphate of the hexagonal system structure at 60.degree.-200.degree. C. in a solution of an inorganic acid, an inorganic acid salt and/or an inorganic acid ester where the molar ratio of the inorganic acid component to the rare earth phosphate of the hexagonal system structure is 0.5-400.
Abstract: A purified form of adipic acid containing 0.1 to 2.0 ppm of copper in the form of an ionic copper compound that is useful in the formation of nylon polymer, nylon yarns, and polyester polyols of low color.
Abstract: The invention relates to spin finishes which contain compounds of the formulaHO(CH.sub.2 CH.sub.2 O).sub.x --RO--(CH.sub.2 CH.sub.2 O).sub.y H Iin whichR is an alkylene radical which is mono- or polysubstituted by alkyl, has 2 to 4 carbon atoms in the alkylene chain and contains methyl, ethyl, propyl or isopropyl as the alkyl substituent, andthe sum of x and y is 10 to 20, x and y being different from zero, and to a process for the spin finishing of fibers.
Abstract: A process for the preparation of monomeric polyvinyl compounds and/or oligomers thereof comprising:(i) preactivating a supported rhenium oxide catalyst with a hydrocarbyl metal compound; and(ii) reacting, under metathesis reaction conditions, norbornene or one or more substituted norbornenes, or mixtures thereof, with ethylene in the presence of the activated supported catalyst of step (i).
Type:
Grant
Filed:
November 9, 1992
Date of Patent:
November 23, 1993
Assignee:
Union Carbide Chemicals & Plastics Technology Corporation
Abstract: Calcium salts, such as calcium acetate, calcium formate or calcium proprionate, are obtained from aqueous liquors derived from the pyrolysis of lignocellulosic biomass containing cellulose, hemicelluloses or starch. The above biomass is subjected to rapid pyrolysis to obtain a crude product containing an aqueous phase and an organic phase. The product obtained, preferably as the aqueous phase, is then distilled to produce a distillate containing at least one acid selected from acetic acid, formic acid and propionic acid as well as their esters and formaldehyde. An alkaline source of calcium is added to this distillate to adjust the pH to an alkaline level sufficient to hydrolyze the esters, cause at least partial oxidation of the formaldehyde and prevent volatilization of acetate, formate or propionate ions as acetic acid, formic acid or propionic acid respectively.
Type:
Grant
Filed:
January 4, 1993
Date of Patent:
November 23, 1993
Assignee:
Energy Mines & Resources Canada
Inventors:
Klaus H. Oehr, Donald S. Scott, Stefan Czernik
Abstract: This invention relates to an improved method for ply-twisting nylon yarns at twisting speeds greater than 6000 rpm. More particularly, the invention involves coating the nylon fibers with less than about 1% by weight of finish containing an alkyl polyoxyalkylene carboxylate ester lubricant composition. The resulting ply-twisted yarn is especially suitable for use as pile in carpets.
Abstract: .omega.-Formyl-C.sub.4 -C.sub.20 -alkanecarboxylic esters are prepared by reacting C.sub.4 -C.sub.20 -alkenecarboxylic esters with carbon monoxide and hydrogen at from 30.degree. to 150.degree. C. and under from 0.01 to 30 bar in the presence of rhodium carbonyl complexes which are modified with polyphosphites.
Type:
Grant
Filed:
February 17, 1993
Date of Patent:
November 23, 1993
Assignee:
BASF Aktiengesellschaft
Inventors:
Michael Roeper, Peter M. Lorz, Dieter Koeffer
Abstract: Compounds having the formula (i), (ii) and (iii), ##STR1## where R is H, alkyl of 1 to 6 carbons, or CO--R.sub.2 where R.sub.2 is alkyl of 1 to 6 carbons; R.sub.1 is H, CH.sub.3, or (CH.sub.2).sub.m --CH.sub.3 ; n is an integer having the values of 2 to 10, m is an integer having the values of 1 to 6, have anti-androgen activity on secondary androgen receptor sites. The compounds are useful for treating mammals, including humans afflicted with acne, male pattern baldness, adhesions and keloids. The compounds are also effective for treating other diseases or conditions which are related to androgen receptors, such as undesirable formation of breast capsules in females after breast augmentation surgery, osteoarthritis and symptoms of Alzheimer's disease. The compounds also have inhibitory effect on the metabolism of certain microorganisms and fungi of the kind, the metabolism of which is normally known to be controllable by anti-androgen compounds.
Abstract: A process for the catalytic gas-phase oxidation of acrolein to acrylic acid in a fixed-bed reactor with contacting tubes, at elevated temperature on catalytically active oxides with a conversion of acrolein for a single pass of .gtoreq.95%, wherein the reaction temperature in the flow direction along the contacting tubes in a first reaction zone before the starting reaction gases containing the reactants enter the contacting tubes is from 260.degree. to 300.degree. C. until an acrolein conversion of from 20 to 40% is reached, and the reaction temperature is subsequently reduced by a total of from 5.degree. to 40.degree. C., abruptly or successively in steps or continuously along the contacting tubes until a methacrolein conversion of .gtoreq.95% has been reached, with the proviso that the reaction temperature in this secondary reaction zone is not lower than 240.degree. C.
Type:
Grant
Filed:
September 17, 1992
Date of Patent:
November 23, 1993
Assignee:
BASF Aktiengesellschaft
Inventors:
Ulrich Hammon, Klaus Herzog, Hans-Peter Neumann
Abstract: This invention relates to pharmaceutical compounds of structural formula (I): ##STR1## and compositions and methods of treatment utilizing these compounds to inhibit farnesyl protein transferase and farnesylation of the oncogene protein Ras.
Abstract: A method of purifying alkoxysilanes contaminated by organosilicon compounds with hydrolyzable chlorine atoms is disclosed wherein the alkoxysilanes are reacted in a pressure reactor with an alcohol, preferably in the presence of an HCl acceptor, at a temperature of 5.degree. C. to 160.degree. C. above the boiling point of the alcohol used and at the pressure which develops in the reactor.
Type:
Grant
Filed:
September 2, 1992
Date of Patent:
November 9, 1993
Assignee:
Degussa Aktiengesellschaft
Inventors:
Thomas Goebel, Peter Panster, Werner Will, Peter Kleinschmit
Abstract: This invention relates to a Process for the preparation of Chelatant Organic Acids, from Pentosanes contained in corn husk, wheat seed husk, rice seed husk, oat seed husk, barley seed husk, cotton seed husk, sorgus seed husk, buffel, alfalfa and similar pastures, and harvests and residues of such.
Abstract: Chiral tridentate bis(phospholanes) which coordinate as ligands in a meridinal fashion on an octahedral metal or which coordinate in square-planar environments are provided with a method for their preparation.
Abstract: A process for the preparation of a polyoxyalkylene-alpha,omega-dicarboxylic acid by reacting the corresponding polyoxyalkylene glycol with a stable free radical nitroxide in the presence of a NO.sub.x -generating compound and optionally, an oxidant and/or a solvent, at a temperature in the range of from about 0.degree. C. to about 100.degree. C. and thereafter separating out the polyoxyalkylene-alpha,omega-dicarboxylic acid.
Abstract: An apparatus for forming multicolor electrophotographic images through a wet-type developing process has charging, exposure, development, transfer, and cleaning devices disposed around a rotatable latent image carrier. The development device has at least one roller disposed in confronting relation to the latent image carrier, and a development housing in which the roller is rotatably disposed. During the developing process, the development device is supplied with a desired one of liquid developers of different colors stored in respective liquid developer tanks.