US PATENT SUBCLASS 162 / 47
.~ With heat recovery

Current as of: June, 1999
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162 /   HD   PAPER MAKING AND FIBER LIBERATION

1  DF  PROCESSES OF CHEMICAL LIBERATION, RECOVERY OR PURIFICATION OF NATURAL CELLULOSE OR FIBROUS MATERIAL {33}
47.~ With heat recovery

DEFINITION

Classification: 162/47

(under subclass 1) Processes combined with a separation or recovery of heat from the chemical digestion or treatment.

SEE OR SEARCH THIS CLASS, SUBCLASS:

54, for processes of fiber digestion or treatment combined with means to cool the liquid so as to freeze at least a portion thereof.

239, for a digester combined with means to recover heat therefrom.

SEE OR SEARCH CLASS

165, Heat Exchange, appropriate subclasses, for heat exchange methods and apparatus not otherwise provided for.