Abstract:
Continuous manufacture of 1-methyl-3-phenylindans by dimerization of styrene in the presence of acid and specific concentrations of starting material and end product. The products are starting materials for the manufacture of dyes and pesticides.
Abstract:
Continuous production of alkali metal salts of nitrilotriacetic acid from an alkali metal cyanide, formaldehyde and ammonia by reaction of the components in at least two stages, the alkali metal cyanide being reacted with formaldehyde in stoichiometric or substantially stoichiometric ratio at temperatures of 50* to 200* and pressures of from atmospheric pressure to 50 atmospheres gauge in the presence of an excess of ammonia in the first stage and (while simultaneously removing ammonia) further amounts of alkali metal cyanide and formaldehyde being allowed to act at temperatures of 60* to 110*C in one or more subsequent stages, 5 to 35 mole percent of the total amount of alkali metal cyanide required being replaced by free hydrocyanic acid and/or hydroxyacetonitrile.
Abstract:
Production of alkali metal salts of nitrilotriacetic acid from an alkali metal cyanide, formaldehyde and ammonia by reaction in at least two stages, the alkali metal cyanide being reacted with formaldehyde in approximately stoichiometric ratio of 50* to 200* C. and 2 to 50 atmospheres gauge in the presence of an excess of ammonia in the first stage and the resultant solution (after decompression to atmospheric pressure) being treated in one or more further stages with further amounts of alkali metal cyanide and formaldehyde at 60* to 110* C. while removing ammonia at the same time.
Abstract:
A continuous process for the production of alkali metal salts of nitrilotriacetic acid by reaction in a first stage of alkali metal cyanide, formaldehyde and excess ammonia at superatmospheric pressure and elevated temperature to form an aminoacetic acid solution, followed by depressurizing and treating the solution obtained with further amounts of alkali metal cyanide and formaldehyde while removing the ammonia formed until conversion to nitrilotriacetic acid is complete.
Abstract:
Continuous manufacture of propylene oxide by turbulent jet mixing of propylene chlorohydrin solution with aqueous alkali, mixing with steam to produce a two-phase mixture and a special working-up process following turbulent passage through a reaction zone with a short residence time. Propylene oxide is obtained in high yield and high space-time yield.
Abstract:
Method and apparatus for isothermal calorimetry in which the temperature within the calorimeter is maintained at a constant value by the application of energy in the form of pulses of constant power, which pulses are counted and summated, the number of pulses per unit time being determined by temperature control means.