PROCEDURE FOR THE PREPARATION OF ALKALIMETAL MONO, DI, OR TRIPHOSPHATES OR MIXTURES THEREOF, BY A SPRAY METHOD AND APPARATUS FOR CARRYING OUT THIS PROCEDURE

摘要

1430202 Chemical furnaces BENCKISER-KNAPSACK GmbH 8 Feb 1973 [8 Feb 1972] 48189/74 Divided out of 1430201 Heading F4B Apparatus for the production of alkali metal phosphates by the process disclosed in Specification 1,430,201 comprises a rotary furnace 16 supplied from a twin piston pump 11 with phosphoric acid and an aqueous solution of hydroxide via a mixing tube 14 and one or more nozzles 15, means for discharging the phosphate produced and a conveyer system 17, 18, 19 whereby part of the phosphate can be recycled. The furnace has lifters 20 and the nozzles 15 have a diameter of 15-40 mm. The nozzles spray on to a continuously falling curtain of recycled material in order to avoid caking of material on the furnace walls and agglomeration of said material.