Abstract: A corrutherm expansion fixture is provided for supporting a part in a desired configuration during a brazing operation. The fixture includes a discontinuous corrugated ring formed from material which is expansible when subjected to high temperature. The fixture also includes a continuous inner ring and a discontinuous outer ring between which the corrugated ring is disposed. The inner ring resists inward movement of the corrugated ring when expansion force is exerted by the corrugated ring. The outer ring supports the part to be brazed and transmits the expansion force to the part to retain it in the desired configuration as the force is exerted on the outer ring by the corrugated ring.

Abstract: A monocarbonate transesterification process comprising contacting in the presence of a base, a beta-fluoroaliphatic carbonate and a compound selected from the class consisting of monohydroxy aliphatic alcohols, phenols and ortho-positioned dihydroxy aromatic compounds. The resulting monocarbonates are useful as monocarbonates, per se, or useful in the preparation of polycarbonates which can be molded or formed into films, laminates or reinforced plastics by conventional techniques.

Abstract: Aromatic hydroxyaldehydes, such as o- and p-hydroxybenzaldehyde, are prepared by the reaction of a phenolic compound, chloroform, and an alkali metal hydroxide at a temperature from about 70.degree. to about 105.degree. C. at elevated pressure according to the Reimer-Tiemann reaction. The process improvement results in decreased reaction time.

Abstract: Therapeutic device for providing intermittent flow of liquid to an incision or wound. A handpiece containing a suitable motor is supportingly connected to a pump unit containing a reciprocable plate. Operating means connect said motor to said plate for effecting reciprocation thereof in a direction perpendicular to the plane of the plate. A resiliently flexible tube extends through said pumping unit and adjacent said plate and is subjected to peristaltic pumping action as said plate reciprocates, thereby urging liquid within said tube to move intermittently therethrough. One end of the tube is connected to a source of liquid and the other end is connected to a suitable nozzle for directing such liquid into the wound or incision.

Abstract: A de-alkylation process which comprises contacting a t-alkylether-alkanol, e.g. 4-t-butylether-n-butan-1-ol, with an acidic solid mixed oxide, e.g. silica-alumina, catalyst which results in the formation of alkanediols, e.g. 1,4-butanediol, in the substantial absence of undesirable side reactions, e.g. the formation of tetrahydrofuran. The resulting alkanediols are useful in the preparation of polyesters, e.g. polybutylene terephthalates.

Abstract: A carbonylation process which comprises contacting a .beta.-fluoroalkanol, carbon monoxide, a base, and the Group IIB element mercury present in an oxidation state greater than zero. The resulting .beta.-fluoroaliphatic carbonates can be employed in combination with alkanols and/or phenols to prepare aliphatic and aromatic mono- and polycarbonates. The resulting carbonates are useful in a wide variety of applications, especially polycarbonates which can be molded or formed into films, sheets, fibers, laminates, or reinforced plastics by conventional techniques.

Abstract: Aromatic compounds in an acidic, aqueous solution can be economically nitrosated by treatment with the hydration products of oxides of nitrogen at a temperature in the range of -15.degree. C. to 10.degree. C. The oxides of nitrogen are generated as a gas from a separate solution or slurry by the reaction of an alkali metal nitrate with a strong mineral acid at a temperature in the range of 15.degree. C. to 35.degree. C. This method of nitrosation employs relatively inexpensive reagents, but can be carried on continuously and produces unexpectedly high yield of para-nitrosated product from a monosubstituted starting material.

Abstract: Oxygenated compounds are prepared by reacting olefinically unsaturated compounds with carbon monoxide and hydrogen in the presence of a hydroformylation catalyst with suppression of the olefin hydrogenation side reaction if an acid is used in the reaction mixture. Typically, o-phthalic acid suppresses the formation of hexane and n-propanol, respectively, when 1-hexene and allyl alcohol are hydroformylated.

Abstract: A polycarbonate process comprising contacting in the presence of a base, a .beta.-fluoroaliphatic carbonate, and a polyhydroxy compound selected from alcohols and/or phenols. The resulting polycarbonates are useful as polycarbonates per se, or useful in the preparation of high molecular weight polycarbonates which can be molded or formed into films, laminates or reinforced plastics by conventional techniques.

Abstract: An apparatus for cleaning an endless paper making felt continuously during the paper making process, and wherein the moving felt is passed through a cleaning bath, and ultrasonic vibrations are applied substantially uniformly across the entire width of the felt while the felt is immersed in the bath, to thereby achieve uniform cleaning of the felt and thus uniformity in the paper produced on the machine. The apparatus comprises an open, rectangular tank having a removable end wall, and a guide roll and ultrasonic transducers movably mounted in the tank, whereby the endless felt may be readily removed and/or replaced by removing the end wall, and lifting the guide roll and transducers, so that the felt may be slipped into the tank beneath the guide roll and transducers.

Abstract: A process for the selective ortho-alkylation of a phenolic compound which comprises reacting at a temperature of at least 185.degree. C. in the presence of a copper chromite catalyst said phenolic compound with an alkanol of 1 to about 12 carbon atoms.

Abstract: 2-Alkoxytetrahydrofurans are prepared in higher yields when an allylic alcohol is hydroformylated in the presence of an alkanol and a rhodium/tertiaryphosphine-complex if an acid co-catalyst is used. The products are useful, inter alia, as intermediates in the preparation of butanediols and substituted derivatives thereof.

Abstract: An improved process for producing tetrahydrofuran from 1,4-butanediol, the improvement comprising carrying out the dehydration in the presence of a tungsten oxide catalyst.

Abstract: A therapeutic radiographic apparatus includes a source of a pencil-like beam of penetrating radiation which requires to be positioned relative to a patient's body so that the radiation passes, at all times during therapy, through an anomaly, such as a tumor, in the patient's body. It is difficult to maintain coincidence of the beam with the anomaly, and this invention provides means for indicating optically a point of contact of the beam with the patient's body. The point of contact may, for example, be the point of emergence of the beam from the body.

Abstract: 2-Alkoxytetrahydrofurans are prepared by hydroformylation of an allylic alcohol in the presence of an alkanol and a rhodium hydroformylation catalyst. The products are useful, inter alia, as intermediates in the preparation of butanediols and substituted derivatives thereof.

Abstract: The resiliently coated metallic finger seal described herein is formed of two metallic seal members being fixed together at one end with fingers projecting rearwardly therefrom. The fingers on each member are offset so that the slits of each metallic seal member are not aligned. The fingers of the two members are then encapsulated by a resilient coating material, such as a room temperature vulcanizing silicone rubber. The seal means is described as annular and can be constructed of one piece or a plurality of sections. In constructing the seal means the metallic seal members are cleaned, primed where it is desired to have the resilient coat permanently affixed, and the resilient coat is then applied. The resilient coat does not cover the entire fingers so that the proper flexibility at the hinge location will reamin. After curing of the resilient coating material a heat reflecting and lubricating material is placed thereon.

Abstract: A vapor phase process for preparing allylic alcohols which comprises reacting an allylic ester of a lower alkyl carboxylic acid with a lower alkanol in the presence of a zeolite transesterification catalyst.

Abstract: The process of preparing diphenyl oxide from caustically hydrolyzing chlorobenzene, wherein phenol is a by-product, is improved by recycling the phenol. The improvement not only maximizes the yield of diphenyl oxide while minimizing the yield of phenol, but it also increases the yield of desirable by-products, such as phenylphenols and biphenylylphenyl ethers.

Abstract: A process for preparing allylic esters of carboxylic acids which comprises reacting a mixture of a lower alkyl carboxylate ester, water, and the corresponding carboxylic acid and alcohol with an olefin having an allylic carbon-hydrogen bond and oxygen in the presence of an oxidation catalyst.

Abstract: A process comprising (1) hydroformylation of allyl acetate or 1-propenyl acetate to form isomeric acetoxybutyraldehydes, and (2) recycle of the mixture obtained by dehydroformylation of at least a portion of the acetoxybutyraldehyde isomers as feedstock in (1).