Abstract: Novel partially fluorinated alkenes having the Formula: ##STR1## wherein each R is the same or different and is selected from the group consisting of CF.sub.3, CHF.sub.2, CH.sub.2 F, and CH.sub.3 CF.sub.2, and R' is an alkenyl or fluoroalkenyl group having 1 to 6 carbon atoms have utility as solvents in a variety of industrial cleaning applications including cold cleaning, dry cleaning, and defluxing of printed circuit boards.
Type:
Grant
Filed:
December 4, 1990
Date of Patent:
February 11, 1992
Assignee:
Allied-Signal Inc.
Inventors:
Chien C. Li, Kane D. Cook, Rajat S. Basu
Abstract: 1,1,1,2-Tetrafluoroethane (R134a) is purified to remove 50-10,000 wt. ppm of 2-chloro-1,1-difluoroethylene (R1122) by contacting with a zeolite or carbon molecular sieve having an average pore diameter of 3.8 to 4.8 Angstroms. The zeolite or carbon molecular sieve is regenerated by inert gas stripping residual R134a, followed by a regeneration at elevated temperatures using an inert gas. Regeneration of the zeolite or carbon molecular sieve is accomplished without the substantial reduction in capacity for impurities.
Abstract: Stable azeotrope-like compositions of 1,1-dichloro-1-fluoroethane, a mono-chlorinated C.sub.3 alkane and optionally an alkanol which are useful in a variety of industrial cleaning applications including cold cleaning and defluxing of printed circuit boards.
Abstract: Stable azeotrope-like compositions comprising 1,1-dichloro-1-fluorethane, dichlorotrifluoroethane, ethanol, and a mono- or di-chlorinated C.sub.2 or C.sub.3 alkane which are useful in a variety of industrial cleaning applications.
Type:
Grant
Filed:
August 15, 1990
Date of Patent:
February 4, 1992
Assignee:
Allied-Signal Inc.
Inventors:
Leonard M. Stachura, Peter B. Logsdon, Ellen L. Swan, Rajat S. Basu
Abstract: The present invention provides a novel compound represented as ##STR1## The present novel compound is prepared by reacting fluorine with pyridine-boron trifluoride and is useful as a fluorinating agent in the fluorination of organic compounds.
Type:
Grant
Filed:
January 29, 1991
Date of Patent:
February 4, 1992
Assignee:
Allied-Signal Inc.
Inventors:
Michael Van Der Puy, David Nalewajek, George A. Shia, William J. Wagner
Abstract: Stable azeotrope-like compositions consisting essentially of 1,1-dichloro-1-fluoroethane, cyclopentane and optionally an alkanol which are useful in a variety of industrial cleaning applications including cold cleaning and defluxing of printed circuit boards.
Type:
Grant
Filed:
September 11, 1990
Date of Patent:
February 4, 1992
Assignee:
Allied-Signal Inc.
Inventors:
Ellen L. Swan, Rajat S. Basu, Richard M. Hollister
Abstract: The present invention relates to a process for the preparation of 2-fluorobenzonitrile. The process comprises the steps of:(a) heating saccharin and phosphorus pentachloride under conditions and for a time sufficient to provide 2-cyanobenzenesulfonyl chloride; and(b) reacting the 2-cyanobenzenesulfonyl chloride with alkali metal fluoride in solvent for said 2-cyanobenzenesulfonyl chloride under conditions and for a time sufficient to provide 2-fluorobenzonitrile.The present invention provides a process for the preparation of 2-fluorobenzonitrile which is a versatile intermediate for a variety of 2-fluoro substituted benzenes. For example, hydrolysis of 2-fluorobenzonitrile leads to 2-fluorobenzoic acid or 2-fluorobenzamide while reduction of 2-fluorobenzonitrile leads to 2-fluorobenzylamine. Also, the reaction of 2-fluorobenzonitrile with organometallic reagents results in various 2-fluorophenyl ketones.
Abstract: A vapor degreasing open topped defluxer is disclosed in which cleaning solvent vapors are generated by boiling a liquid solvent in an open topped tank with the parts to be cleaned inserted therein through the open top. The open topped tank is formed from plural upright sidewalls connected to a bottom wall. Heating elements disposed in the tank bottom vaporize the solvent such that the generated heated solvent vapors rise above the liquid solvent to contact the parts to be cleaned and dissolve the grease on the parts. A condenser coil supported within the tank above the liquid solvent condenses the solvent vapors and defines an upper limit or vapor line of the solvent vapor zone located above the liquid solvent and below uppermost edges of the upright sidewalls. The light rising solvent vapors have a natural tendency to rise upwardly out of the tank by following a convection flow path generally along the inner surfaces of the sidewalls and upwardly past the uppermost edges thereof.
Type:
Grant
Filed:
September 25, 1990
Date of Patent:
December 31, 1991
Assignee:
Allied-Signal Inc.
Inventors:
Joel E. Rodgers, Sr., Thomas W. Godlewski
Abstract: A method of cleaning a solid surface is disclosed. The method involves spraying the solid surface with azeotrope-like compositions by using a propellant. The azeotrope-like compositions comprise from about 93.0 to about 98.0 weight percent 1,1-dichloro-1-fluoroethane, from about 7 to about 2 weight percent methanol, and from about 0.1 to about 0.01 weight percent nitromethane. Preferably, the propellant is selected from the group consisting of hydrocarbons, chlorofluorocarbons, hydrochlorofluorocarbon, hydrofluorocarbon, dimethyl ether, carbon dioxide, nitrogen, nitrous oxide, methylene oxide, air, and mixtures thereof.
Type:
Grant
Filed:
March 7, 1990
Date of Patent:
December 17, 1991
Assignee:
Allied-Signal Inc.
Inventors:
David P. Wilson, Ian R. Shankland, Earl A. E. Lund
Abstract: Purification of a concentrated aqueous solution of hydroxylamine sulfate (HAS) is carried out by contacting with an organic solution of 1-phenyl-3-methyl-4-trifluoroacetylpyrazol-5-one (HPMTFP) and trioctylphosphine oxide (TOPO). Divalent iron (Fe.sup.II) is removed to below about 3 wt. ppm making it possible to use the purified solution directly in the production of oxime compounds without further purification heretofore required.
Abstract: Stable azeotrope-like compositions consisting essentially of 1,1,2-trichloro-1,2,2-trifluoroethane, 1,2-dichloroethylene, cyclopentane, methanol, nitromethane, and optionally diisopropylamine which are useful in a variety of industrial cleaning applications.
Type:
Grant
Filed:
June 25, 1990
Date of Patent:
November 12, 1991
Assignee:
Allied-Signal Inc.
Inventors:
Ellen L. Swan, Leonard M. Stachura, Rajat S. Basu, David P. Wilson
Abstract: Novel partially fluorinated alkanes having the Formula: ##STR1## wherein each R is the same or different and is selected from the group consisting of CF.sub.3, CHF.sub.2, CH.sub.2 F, and CH.sub.3 CF.sub.2, and R' is an alkyl or fluoroalkyl group having 1 to 6 carbon atoms with the proviso that when each R is CF.sub.3, R' is not CF.sub.3 (CF.sub.2).sub.2 -, CH.sub.3 CF.sub.2 -, or CF.sub.3 have utility as solvents in a variety of industrial cleaning applications including cold cleaning, dry cleaning, and defluxing of printed circuit boards.
Abstract: The present invention provides a repair device for a cracked valve. The present invention is a valve with at least one crack on the packing nut or threaded portion thereof wherein the valve has a repair device for the crack installed thereon. The repair device comprises the combination of: (a) means for reinforcing the threaded portion of the cracked valve; and (b) means for securing the reinforcing means to the cracked valve. The combination applies a circumferential clamping force on the cracked valve and a driving force on the packing nut. The present composition is useful in repairing cracked valves on containers such as high pressure seamless tubes used for transporting boron trifluoride gas.
Abstract: Azeotrope-like compositions comprising 1,1-dichloro-1-fluoroethane; dichlorotrifluoroethane; and methyl formate are stable and have utility as degreasing agents and as solvents in a variety of industrial cleaning applications including cold cleaning and defluxing of printed circuit boards.
Type:
Grant
Filed:
December 20, 1989
Date of Patent:
September 17, 1991
Assignee:
Allied-Signal Inc.
Inventors:
Peter B. Logsdon, Ellen L. Swan, Leonard M. Stachura, Rajat S. Basu
Abstract: Stable azeotrope-like compositions of 1,1,2-trichloro-1,2,2-trifluoroethane, nitromethane, 1,2-dichloroethylene and an alkanol which are useful in a variety of industrial cleaning applications.
Type:
Grant
Filed:
October 6, 1989
Date of Patent:
July 30, 1991
Assignee:
Allied-Signal Inc.
Inventors:
Hillel Magid, Ian R. Shankland, David P. Wilson, Kane D. Cook, Earl A. E. Lund
Abstract: Azeotrope-like compositions comprising 1,1-dichloro-1-fluoroethane; dichlorotrifluoroethane; and dichloromethane are stable and have utility as degreasing agents and as solvents in a variety of industrial cleaning applications including cold cleaning and defluxing of printed circuit boards.
Type:
Grant
Filed:
December 22, 1989
Date of Patent:
June 25, 1991
Assignee:
Allied-Signal Inc.
Inventors:
Ellen L. Swan, Peter B. Logsdon, Leonard M. Stachura, Rajat S. Basu
Abstract: Azeotrope-like compositions comprising 1,1-dichloro-1-fluoroethane; dichlorotrifluoroethane; and alkane or cycloalkane having 5 carbon atoms are stable and have utility as degreasing agents and as solvents in a variety of industrial cleaning applications including cold cleaning and defluxing of printed circuit boards and dry cleaning and as blowing agents.
Type:
Grant
Filed:
May 25, 1990
Date of Patent:
June 25, 1991
Assignee:
Allied-Signal Inc.
Inventors:
Peter B. Logsdon, Ellen L. Swan, Leonard M. Stachura, Rajat S. Basu
Abstract: Compositions comprising polyamides, polyolefins and ethylene vinyl alcohol copolymers useful as compatibilizers, related processes and articles made therefrom. A composition comprising from 50 to 99.4 percent by weight of a polyolefin, from 0.5 to 50 percent by weight of a polyamide, from 0.1 to 10 percent by weight of an ethylene vinyl alcohol copolymer comprising from 50 to 95 mole percent ethylene groups and from 5 to 50 mole percent vinyl alcohol groups and less than 5.0 mole percent and preferably less than 2.0 mole percent unhydrolyzed vinyl acetate groups.
Type:
Grant
Filed:
May 2, 1990
Date of Patent:
June 18, 1991
Assignee:
Allied-Signal Inc.
Inventors:
Charles D. Mason, William Sacks, Theodore R. Engelmann, Satyajit Verma
Abstract: Stable azeotrope-like compositions comprising 1,1-dichloro-1-fluoroethane, dichlorotrifluoroethane, methanol, and a mono- or di-chlorinated C.sub.2 or C.sub.3 alkane which are useful in a variety of industrial cleaning applications.
Type:
Grant
Filed:
November 13, 1989
Date of Patent:
June 18, 1991
Assignee:
Allied-Signal Inc.
Inventors:
Peter B. Logsdon, Leonard M. Stachura, Ellen L. Swan, Rajat S. Basu
Abstract: A solvent vapor control apparatus used in conjunction with a degreaser or defluxer into which articles to be degreaser or defluxed are conveyed into intimate contact with liquid solvent and/or a vapor phase thereof is disclosed. The vapor control apparatus includes a housing having a conveyor flow path with an inlet opening in communication with solvent vapor in the degreaser/defluxer and an outlet in communication with ambient air. The inlet is preferably disposed elevationally above the solvent vapor zone to impede outflux of solvent vapor. A baffle defining the uppermost extent of the conveyor flow path establishes a low point in the path disposed elevationally below adjacent upstream and downstream sections of the path. The low point is provided with chilled air which condenses solvent vapor as the articles are forced to enter the chilled air section.
Type:
Grant
Filed:
September 21, 1989
Date of Patent:
April 16, 1991
Assignee:
Allied-Signal Inc.
Inventors:
Joel E. Rodgers, Sr., Ambrose J. Schmitz, Alton D. Romig