Abstract:
A method for the preparation of orthoformic acid trialkyl esters is disclosed. The process comprises continuously reacting chloroform and alkali alcoholates under anhydrous conditions at elevated temperatures and pressures.
Abstract:
Process for the production of potassium titanyl oxalate which comprises heating a tetraalkyl titanate with about three times the molar amount of water and twice the molar amount of potassium hydrogen oxalate. If desired, two thirds of the water is added initially and the balance subsequently. A solvent such as an alkanol may be employed. Advantageously the reaction, distillation of volatiles, crystallization and drying are all performed in the same vessel.
Abstract:
In a tubular reactor carrying a bed of solid material into which carbon electrodes project for heating the material upon passage of a current, the outside ends of said electrodes being connected to metallic conductors in turn connected to a supply of current, the invention involves pouring lead about the end of each electrode to effect improved contact between the electrode and its respective metallic conductor. The process involving use of such electrodes to react carbon with chlorine and the oxide of silicon or metals such as vanadium, titanium or zirconium is also covered.
Abstract:
A method for preparing Delta 2,5-cyclohexadiene dicarboxylic acid-1,2 is disclosed. The process involves reduction of an alkali phthalate by means of an alkali metal amalgam. The disclosed method has particular utility in that an efficient means for selectively reducing phthalic acid to Delta 2,5cyclohexadiene dicarboxylic acid-1,2 is provided.
Abstract:
In the manufacture of a polyurethane by the reaction of a polyol with a polyisocyanate in the presence of a catalyst and in the absence of water, the catalyst used is an organic zirconium compound, preferably a zirconium alcoholate or phenolate, having the formula: (Y)mZr(YR)4 2m WHEREIN: Zr is a zirconium atom Y is an oxygen or sulfur atom R is an organic radical of up to 12 carbon atoms, which can be alike or different M IS 0 OR 1.
Abstract:
IN THE PRODUCTION OF VANADIUM OXYTRICHLORIDE WHEREIN VANADIUM PENTOXID, CARBON AND CHLORINE ARE REACTED, THE IMPROVEMENT WHICH COMPRISES EFFECTING THE REACTION BY CONTACTING A MIXTURE OF FINE-GRAINED VANADIUM PENTOXIDE AND CARBON IN THE FORM OF A GAS PERMEABLE LAYER ABOUT 0.5 TO 20 CM. HIGH WITH CHLORINE AT A TEMPERATURE OF ABOUT 350 TO 750*C. PREFERABLY THE PROCESS IS CARRIED OUT CONTINUOUSLY AND THE REACTION TEMPERATURE IS MAINTAINED AND CONTROLLED BY REGULATING THE RATE OF ADDITION OF THE REACTANTS. THE RESULTING VANADIUM OXYTRICHLORIDE IS VOLATILIZED AT A TEMPERATURE OF ABOUT 150*C. AND IS THEREAFTER CONDENSED.
Abstract:
AN ELECTRICAL INSULATING MATERIAL CONSISTS ESSENTIALLY OF: (1) A SINTERED MAGNESIA OF AT LEAST 94 WEIGHT PERCENT PURITY, AND (2) 0.1 TO 7 WEIGHT PERCENT OF A SILICA GEL HAVING A SPECIFIC SURFACE AREA IN THE RANGE OF 50 TO 1100 M.2/G., AND A SIZE LESS THAN 370U, PREFERABLY LESS THAN 70U. THIS INSULATING MATERIAL IS PARTICULARLY USEFUL IN THE MANUFACTURE OF TUBULAR HEATING COILS AND INSULATORS.
Abstract:
In the manufacture of a polyurethane by the reaction of a polyol with a polyisocyanate in the presence of a catalyst and in the absence of water, the catalyst used is an organic vanadium compound, preferably a vanadium or vanadyl alcoholate or phenolate, having the formula: (Y)mV(YR)a 2m WHEREIN: V is a vanadium atom Y is an oxygen or sulfur atom R is an organic radical, which can be alike or different if the molecule contains more than one A IS 4 OR 5 M IS 0 OR 1 WHEN A IS 4, AND 1 WHEN A IS 5.
Abstract:
COMPOUNDS OF THE FORMULA MG(OR)2-(ROH)N ARE PREPARED BY FIRST PRETREATING THE ALCOHOL, ROH, WITH THE ORTHOFORMIC ACID ESTER OF THAT ALCOHOL, AND THEN REACTING METALLIC MAGNESIUM WITH THE PRETREATED ALCOHOL, P-TOLUENESULFONIC ACID MAY ADDITIONALLY BE USED TO PRETREAT THE ALCOHOL.