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AMMONIUM ARSENATES,ORGANO-SUBSTITUTED ARSENATES,AND SODIUM,POTASSIUM AND CALCIUM ARSENITE AS FIRST STAGE CATALYTIC ADDITIVES IN DIRECT ESTERIFICATION PROCESS
AMMONIUM ARSENATES,ORGANO-SUBSTITUTED ARSENATES,AND SODIUM,POTASSIUM AND CALCIUM ARSENITE AS FIRST STAGE CATALYTIC ADDITIVES IN DIRECT ESTERIFICATION PROCESS