Abstract: Metal tetrafluoroborates, alkali and alkaline earth tetrafluoroborates in particular, and preferably lithium tetrafluoroborate are used as ion source materials in ion implantation of semiconductor materials with boron.

Abstract: A vinyl alcohol copolymer comprising the following general structure: ##STR1## wherein R is hydrogen or methyl;X is an organic linking group such as ##STR2## R.sup.1 is C.sub.1 -C.sub.4 alkyl; R.sub.f is a perfluoronated alkyl or poly(alkyleneoxy) group;m is 0 or 1;x is 50-99.9 mole %;y is 0-50 mole %; andz is 0.001-50 mole %.The vinyl alcohol copolymer has excellent solvent barrier properties.

Abstract: A disposable container for shipping a hazardous or ultra-high purity liquid material is disclosed, having a body of substantially vapor-impermeable organic polymer material, such as fluorinated linear high-density polyethylene, a bubbler tube extending from the top of the container having an open end near the bottom of the container, a liquid level detector, and an outlet tube on the top of the container having an open bottom end near the top of the container. A vapor-impermeable metal coating is provided on the outside of the container by vapor deposition or sputtering. A frangible seal is provided at the top of both the inlet tube and the outlet tube. A metal-coated polymer valve is provided on the bubbler, having vapor-impermeable seals isolating the metal exterior from the metal interior, and also having means for rupturing the frangible seal.

Abstract: Novel compositions of matter are disclosed having the formula: ##STR1## wherein the carbon rings are fully fluorinated to remove all hydrogens and olefinic character. The compositions have utility as heat transfer agents, hydraulic fluids, vapor phase soldering fluids, gas (O.sub.2, N.sub.2, CO.sub.2, H.sub.2, etc.) transport agents, such as in biological and medical fields, as well as utility as burn-in test fluid.

Abstract: The present invention is an improvement to a standard nitrogen generator. The improvement is two-fold; first, the addition of one or more distillation stages above the reboiler, which stages effectively transform the reboiler/condenser into a partial low pressure column and allow further separation (rectification) of the nitrogen generator bottoms liquid into two streams. Second, the recycle of the overhead stream (at a composition close to that of air) from the top of the low pressure column to the main air compressor. Additionally, at least a portion of the oxygen-enriched stream that exits the low pressure column below the bottom tray is expanded to provide refrigeration for the cycle.

Abstract: The present invention relates to an improved process for the reliquefaction of boil-off gas containing up to 10% nitrogen resulting from the evaporation of liquefied natural gas (LNG) contained in a storage vessel. In the process, a closed-loop refrigeration cycle is utilized wherein an isenthalpically expanded stream is warmed against an initially cooled boil-off stream. The boil-off LNG stream is initially cooled by indirect heat exchange with an isentropically expanded refrigerant stream.

Abstract: Crude ammonia synthesis gas is obtained by primary steam reforming of a hydrocarbon gas mixture rich in methane, such as natural gas, followed by secondary reforming of the primary reformate with added air and shift conversion of the contained CO to CO.sub.2. The shift conversion product is first freed of contained CO.sub.2 by selective absorption in a novel PSA unit having an integrated B section for removal of remaining impurities such as carbon monoxide and methane, thereby providing as product a gas stream comprised of hydrogen and nitrogen in approximate 3:1 molar ratio accompanied by a small amount or argon derived from the air stream used in the secondary reforming step. Alternative embodiments are disclosed for removal of CO from the gas stream, before its entry into the NH.sub.3 conversion operation; any residual CO that might have slipped thorugh the absorbent bed of the B section is converted to CH.sub.4.

Abstract: The present invention relates to an improved process for the reliquefaction of boil-off gas containing up to 10% nitrogen resulting from the evaporation of liquefied natural gas (LNG) contained in a storage vessel. In the process, a closed-loop nitrogen refrigeration cycle is utilized wherein the nitrogen is isenthalpically expanded under conditions for generating a liquid and vapor with the liquid being pressurized by pumping and warmed against an initially cooled boil-off stream. The boil-off LNG stream is initially cooled by indirect heat exchange with an isentropically expanded refrigerant stream.

Abstract: Novel compounds for absorbing carbon monoxide and olefinically-unsaturated compounds from feedstreams are of the formula ##STR1## wherein R.sub.1 is trichloromethyl or R.sub.F ; R.sub.F is C.sub.n F.sub.2n+1 and n is 1-8; R.sub.2 is H or hydrocarbyl of 2-20 carbon atoms having at least one olefinic unsaturated bond; M.sup.I is Cu.sup.I or Ag.sup.I and R.sub.3 is hydrocarbyl of 2-20 carbon atoms having at least one olefinic unsaturated bond.

Abstract: This invention relates to alkenylated diphenyldiisocyanates having at least one alkenyl group ortho to an isocyanate group. More particularly the diphenyldiisocyanates are represented by the formula: ##STR1## wherein R.sub.1, R.sub.2, R.sub.3, R.sub.4 and R.sub.5 are hydrogen, C.sub.1-3 aliphatic, phenyl, halogen or alkoxy radicals, or R.sub.2 and R.sub.4 or R.sub.5 are bridged via an alkylene radical --(CH.sub.2).sub.y -- wherein y=2 to 5 provided not more than one is phenyl, halogen, or alkoxy, X is methylene, alkylene, or branched C.sub.1 -C.sub.6 alkylene group, oxygen, sulfur, carbonyl, sulfonyl or fluoroalkylene group, n is 0 or 1 and z is 0 or 1.The above described alkenylated diphenyldiisocyanates have been found to be well suited for preparing crosslinkable condensation polymers by providing pendant unsaturation for post curing and polymerization. They are also well suited for preparing polyurethane and polyurea elastomer systems.

Abstract: An aqueous waxless size composition for textile yarn comprising in an aqueous solution(a) 100 parts polyvinyl alcohol and(b) 2-6 parts ethylene oxide-propylene oxide surfactant which has a surface tension less than 49 dynes/cm, preferably between about 40 to 48 dynes/cm, as a 0.1% aqueous solution at 25.degree. C., and desirably a foaming number less than about 20 (ml foam/g solution).degree.F. as a 7% aqueous polyvinyl alcohol solution containing 4 parts surfactant per 100 parts polyvinyl alcohol.

Abstract: An aqueous waxless size composition for textile yarn comprising in an aqueous solution(a) 100 parts polyvinyl alcohol and(b) 2-6 parts ethylene oxide-propylene oxide surfactant which has a surface tension less than 49 dynes/cm, preferably between about 40 to 48 dynes/cm, as a 0.1% aqueous solution at 25.degree. C., and desirably a foaming number less than about 20 (ml foam/g solution).degree.F. as a 7% aqueous polyvinyl alcohol solution containing 4 parts surfactant per 100 parts polyvinyl alcohol.

Abstract: The present invention involves apparatus and methods for introducing ion source material into an ion implant system for use in connection with Freeman type sources. A vaporizer unit which is removable from the system is prepared for insertion into the ion implant equipment outside the system. It is cleaned, a new vial of ion source material is introduced and it may be pre-heated to degas it or to prepare it for use in the system. The vaporizer unit which is currently in use is removed, to be cleaned and recharged, and the previously prepared vaporizer unit is inserted, sealed in place and the vacuum established. The ion implant system is, then, ready to resume operation with minimal down time. The vaporizer unit comprises a vaporizer block of high heat conductive material such as copper which includes three cavities or wells. One cavity contains a heater, one a gas flow path for heating and/or cooling, and one contains a sealed vial of semiconductor dopant.

Abstract: A crosslinkable anionic binder composition which comprises an emulsion copolymer containing acrylamidoglycolic acid (AGA) and a zirconium III salt of an alpha or beta hydroxycarboxylic acid, the pH of the composition being from about 1.5 to 4.5. Provided are nonwoven binder compositions which are stable for extended periods prior to application of the binder composition onto the nonwoven substrate and initiation of crosslinking by application of heat.

Abstract: This invention relates to a class of alkenylated toluenediamines and phenylenediamines having at least one alkenyl group ortho to an amine group. More particularly the aryldiamines are represented by the formula: ##STR1## wherein R is hydrogen or C.sub.1 -C.sub.3 aliphatic, R.sub.1 is hydrogen, R.sub.2 is C.sub.2 -C.sub.4, aliphatic and R.sub.1 and R.sub.2 form an alkylene radical (CH.sub.2).sub.y wherein y=3 or 4, and x is one or two.The above described alkenylated aryldiamine, hereafter referred to as diamino-.beta.-alkyl styrenes, have been found to be well suited as antioxidants and as tri-and tetra functional chain extenders in forming polyurethane/urea elastomers systems and for providing pendant unsaturation for post curing and polymerization.

Abstract: The inverse emulsion polymerization of a monomer of the formula ##STR1## wherein R and R.sup.1 represent hydrogen or a C.sub.1 -C.sub.4 alkyl group, using a surfactant system having a hydrophilic-lipophilic balance value from 4 to 9, an azo-type free radical initiator and certain hydrocarbon liquids to yield a water-in-oil emulsion of a homopolymer of at least 10.sup.6 average molecular weight, the emulsion having a viscosity less than 10 cps, at 15% solids, 60 rpm Brookfield and 20.degree. C.Also disclosed is the preparation of poly(vinylamines) of at least 10.sup.6 average molecular weight by acid or base hydrolysis of the homopolymer emulsion.Also disclosed are enhanced oil recovery compositions, drilling mud compositions, cements for drilling holes, completion fluids, acidized fracturing fluids, and wet-end paper additives containing the poly(vinylamines) and demonstrating superior properties.

Abstract: A vacuum vapor transport control system and method for controlling the rate of vapor flow from a reagent reservoir into a vacuum system through an orifice calibrated as to size or flow rate using a high purity fixed gas and vapor provided from multiple reservoirs or mixed vapor provided from a single reservoir.

Abstract: The present invention relates to an improvement to a conventional cryogenic air separation process having an argon sidearm column. The improvement to the process comprises reducing the pressure of the feed gas to the argon sidearm column across a control valve and operating the argon sidearm column at the lowest possible pressure consistent with a minimum temperature difference across the overhead condenser and the unrestricted return of crude oxygen vapor from the overhead condenser to the low pressure column.

Abstract: A gas pressure regulator including a housing having a high pressure chamber into which the gas to be regulated is fed, a low pressure chamber, and an orifice between the high pressure chamber and the low pressure chamber. A bonnet is mounted on the housing across the low pressure chamber. A flexible diaphragm is mounted across the low pressure chamber and separates the low pressure chamber from the bonnet. A rod extends through the orifice and connects the flexible diaphragm to a valve plug in the high pressure chamber so that movement of the flexible diaphragm moves the valve plug toward and away from the orifice. A rigid piston is slidable mounted in the bonnet. A spacer connects the flexible diaphragm and the rigid piston in spaced relation to provide a chamber therebetween. An adjustment stem having a knob on its end is threaded through the bonnet and a spring is compressed between the adjustment stem and the piston.

Abstract: A method is disclosed for nuclear magnetic resonance imaging wherein the improvement is the use of perfluoro 15-crown-5 ether which has 20 magnetically similar fluorine atoms providing a superior signal to noise ratio with resultant enhanced diagnostic resolution.