Showing papers by "Torrey Pines Institute for Molecular Studies published in 1972"

Purification of sodium carbonate

Abstract: A method of treating an aqueous solution of sodium carbonate containing soluble silicates and suspended insoluble matter by digesting the solution at a temperature within the range of about 185* to 220*F. for a time sufficent to substantially reduce the soluble silicates contained therein, separating the solution from the insoluble matter, and obtaining purified sodium carbonate by crystallization. The method is particularly applicable to the treatment of solutions of calcined trona.

Two-stage process for producing soda ash from trona

Abstract: OF SHORT DURATION TO ELIMINATE CONTAINED ORGANIC MATETER WHILE MINIMIZING SOLUBLIZATION OF CONTAINED SILICA. TWO STEP CALCINATION PROCESS FOR PREPARING SODIUM CARBIMATE FROM TRONA, COMPRISING ALOW TEMPERATURE CALCINATION TO CONVERT THE CONTAINED SESQUICARBONATE TO SODUIM CARBONATE, FOLLOWED BY A HIGH TEMPERATURE ROASTING STEP

Additive for nickel plating baths

Abstract: ACID NICKEL PLATING BATH FOR OBTAINING BRIGHT NICKEL DEPOSITS, SAID BATH BEING OF THE CHLORIDE, SULFATE, FLUOBORATE OR SULFAMATE TYPE AND CONTAINING A BRIGHTENER MIXTURE COMPRISING THE DISODIUM SALT OF METHYLENE BIS NAPHTHALENE SULFONIC ACID AND A SECOND COMPONENT SELECTED FROM COUMARIN, PIPERONAL BISULFITE COMPLEX, SODIUM BETASTSYRENE SULFONATE, BENZIMIDAZOLE AND MIXTURES THEREOF, WITH THE PROVISO THAT BENZIMIDAZOLE IS USED ONLY WHEN GREATER THAN 50 MOLE PERCENT OF NICKEL SALT USED IN THE BATH IS NICKEL FLUOBORATE.