Sulfuric Acid → Aluminum Sulfate

With additional reference to FIG. 2, the aluminum-containing residue or char from the kiln is introduced into a batch or continuous reactor 26 as by conveyor 29 and mixed therein with a sulfuric acid solution, as from vessel 27, heated water, as from vessel 28, direct steam, as from source 30 and preferably using thermal energy recovered from the hot gases in steam boiler 22 by various heat exchangers associated with vessels 27 and 28 and steam source 30 in a manner well-known to those of ordinary skill in the art. Mixing of the components in the reactor 26 is preferably accomplished by mechanical agitation, as by stirrer 32. The temperature of the aqueous streams entering the reactor 26 is preferably in the range of from about 80° C. to about 100° C. Reaction of the components in the reactor is believed to produce an aqueous solution of aluminum sulfate by the reaction:

1. additionis introduced into a batch or continuous reactor 26 as by conveyor 29
2. additionmixed
3. customas from vessel 28, direct steam, as from source 30 and preferably using thermal
4. customenergy recovered from the hot gases in steam boiler 22
5. temperatureby various heat exchangers
6. additionMixing of the components in the reactor 26
7. customis preferably accomplished by mechanical agitation, as by stirrer
8. customis preferably in the range of from about 80° C. to about 100° C
9. customReaction of the components in the reactor

ORD record

ord-59da4fe92784490793d710adc4254d62

Source dataset

uspto-grants-1995_10

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US05456739