Chemical apparatus and process disinfecting – deodorizing – preser – Chemical reactor – With means applying electromagnetic wave energy or...
Patent
1978-01-05
1981-03-24
Lutter, Frank W.
Chemical apparatus and process disinfecting, deodorizing, preser
Chemical reactor
With means applying electromagnetic wave energy or...
55178, 137171, 422198, 422227, 422232, 422234, 423320, B01J 1918, C01B 25222
Patent
active
042580072
ABSTRACT:
A system for the preparation of phosphoric acid from phosphate rock and sulfuric acid, includes in combination a first reaction vessel containing a first slurry comprising calcium sulfate hemihydrate, monocalcium phosphate and phosphoric acid, a second reaction vessel containing a second slurry comprising calcium sulfate hemihydrate, circulation means including a draft tube disposed centrally in each of said vessels and an agitator positioned axially in each of said vessels within said draft tube, a first conduit interconnecting said first and second reaction vessels for conducting said first slurry from said first reaction vessel to said second reaction vessel, a second conduit interconnecting said vessels for conducting said second slurry from said second reaction vessel to said first reaction vessel, an inlet pipe for introducing phosphate rock and phosphoric acid to said first reaction vessel, and wherein a vent is connected to said inlet pipe to permit escape of gases and, thus, increasing the rate of flow of said phosphate rock and phosphoric acid to said first reaction vessel.
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Slack, "Phosphoric Acid, vol. 1, pp. 279-284, 369-386, Marcel Dekker, N.Y., 1968.
Adams Allen S.
Gragg F. Michael
Bisson Barry A.
Franks Robert A.
Lutter Frank W.
Occidental Chemical Company
Occidental Research Corporation
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