| PATENT ASSIGNEE'S COUNTRY | Canada |
| UPDATE | 07.99 |
| PATENT ASSIGNEE | This data is not available for free |
| PATENT CLAIMS |
Kraft process in which pulping chemicals are used to treat cellulose fibrous feed material to form pulp, in a process loop in which the fibrous feed material is heated with a white liquor in a digestion stage to produce fibrous pulp & a black liquor & in which the blacq liquor is treated in a recovery cycle which includes the steps of concentrating the black liquor, burning the concd. blacq liquor in a recovery boiler to yield a smelt, treat. the smelt to form said white liquor & returning white liquor to digestion stage, wherein IMPROVEMENT comprises - Collecting pulping chemicals from process loop at point in the loop which is selected so that sulfide content is low - Treat. collected pulping chemicals to remove NaCl in am photeric ion exchange resin - Returning treated pulping chemicals to process loop |
| PATENT PHOTOCOPY | Available on request |
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