Abstract:
A paraffin scraper for pipelines. It is the type commonly called a pig, which is driven through the pipeline by fluid pressure in the pipeline. It has a solid plastic cylindrical shape with a number of annular recesses. In addition, there is a smalldiameter axial bore extending through the whole length of the body to create a jet-fluid stream at the front during scraping action.
Abstract:
A process for the production of higher alkyl acrylates and methacrylates having reduced color numbers and containing minimum quantities of polymerization inhibitors and other impurities, wherein the alkyl chains contain 3 or more carbons, by the transesterification of methyl acrylate or methacrylate with alkanols of 3 or more carbons in the presence of a titanium alcoholate as transesterification catalyst and also in the presence of polymerization inhibitor combination and entraining agent for removing the methyl alcohol by-product. The transesterification is carried out by passing an oxygencontaining gas through the reaction mixture. In recovering the higher alkylacrylates or methacrylates the resultant reaction mixture is subjected to a steam distillation.
Abstract:
In a urea dewaxing process, a powdery adduct, capable of being effectively separated by centrifuging, is formed at a temperature range of from about 20* to 40* C. if particular oil solvent mixtures are employed. Useful solvent mixtures are a C5-C6 hydrocarbon such as isopentane, hexane or benzene plus a higher boiling organic compound such as methylisobutylketone.
Abstract:
HIGH PURITY N-PARAFFINS ARE PRODUCED IN A UREA DEWAXING PROCESS INCORPORATING A REPULPING STEP WHEREIN THE REPULPING OF A POWDERY ADDUCT IS CONDUCTED AT A TEMPERATURE ABOVE THE ADDUCT FORMING TEMPERATURE BUT BELOW THE ADDUCT DECOMPOSITION TEMPERATURE FOLLOWED BY COOLING THE MIXTURE TO THE ADDUCT FORMING TEMPERATURE.
Abstract:
NON-FLAMMABLE, RIGID, FOAMED PHENOL-FORMALDEHYDE RESIN COMPOSITIONS ARE PREPARED BY FIRST FORMING A MIXTURE OF A PHENOL-FORMALDEHYDE RESOL SOLUTION, WATER GLASS AND A FOAMING OR EXPANDING AGENT, AND THEN ADDING AN ACID CURING AGENT TO INITIATE THE FOAMING AND CURING REACTIONS. SUCH COMPOSITIONS ARE USEFUL AS INSULATION MATERIALS, AS STRUCTURAL ELEMENTS, ETC.
Abstract:
A device for continuously measuring the viscosity of highmolecular liquids in turbulent flow comprises a vibrating reed on a viscosimeter mounted in a tube opening into an agitating cylindrical vessel with the free end of the vibrating reed pointing upstream and positioned a distance from the flowing liquid equal to three times the diameter of the tube. The face of the reed is substantially parallel to a plane including a typical arcuate line of flow at the opening, and the tube containing the reed is mounted with its longitudinal axis at an angle between 5* and 15* below a plane of a typical arcuate line of flow at the tube opening. The tube longitudinal axis of one embodiment is mounted at an angle of between 25* and 35* outwardly from a plane tangent to the lines of flow at the tube opening and a modification has the vibrating reed mounted in two tubes and spaced from the opening a distance of three tube diameters. Both embodiments prevent gas cushion build up around the vibrating reed and the attendant inaccurate measurement in a reaction producing higher molecular materials under azeotrope-forming conditions.
Abstract:
PROCESS FOR RENDERING FIBROUS MATEIAL WATER-REPELLENT COMPRISING TREATING THE MATERIAL WITH AN ORGANIC SOLUTION OF THE REACTION PRODUCT OF AN ALCOHOLATE OF TITANIUM, ALUMINUM, OR ZIRCONIUM, AND AN ALKYL-SUBSTITUTED SUCCINIC ANHYDRIDE OR MONO ESTER THEREOF, SAID ALKYL SUBSTITUENT HAVING AT LEAST FOUR CARBON ATOMS.
Abstract:
A MULIPLE STE REACTION PROCESS PRODUCES A PRODUCT COMPOSED PRIMARLIY OF HIGH PURITY 1.3-DIMETHYL1-5-ISOPROPYLBENZENE WITH LOWER CONCENTRATION OF DIMETHYLDISOPROPLBENZENES THAN OBTAINED HEREFORE. IN THE PROCESS. A MIXTURE OF XYLERS IS COMBINED WITH DIMETHYLIDIISOPROPYLBERZENE IN THE PRESENCE OF ALUMINUM CHLORIDE FOR OVER SEVEN HOURS, THAN PROPYLENE IS ADDED TO COMPLETE THE REACTION.
Abstract:
Lubricating oil composition comprising from about 60 to 90 percent of a mineral oil, from about 5 to 30 percent of a vegetable oil or a fatty acid and from about 3 to 15 percent of a chlorinated paraffin containing greater than 40 percent chlorine.
Abstract:
A method for the prevention of coke obstruction in a pyrolysis plant, for example in the cracking of ethane in the manufacture of ethylene, wherein cracked gases from a pyrolysis furnace at a temperature of 750* to 850*C. are passed to a cooler, and a screen is disposed in the inlet portion of the cooler at an easily accessible portion whereby the on stream time of the pyrolysis system is extended.