Pulp processing method for mixed cellulosic materials

Claim 1

A CONTINUOUS METHOD OF OPERATING A PULP TO PAPER WEB PRODUCING ROUTE COMPRISING THE STEPS OF; (A) PULPING AT LEAST TWO SPECIES OF CELLULOSE CONTAINING MATERIAL PROCESSING VARIOUS FRACTIONS OF CELLULOSE PULP OF DIFFERENT CHEMICAL AND PHYSICAL PROPERTIES ASSOCIATED WITH EACH SPECIES OF CELLULOSE CONTAINING MATERIAL AND ITS GROWTH CYCLE, THEREBY OBTAINING A SCREENED PULP CONSISTING OF MIXED FRACTIONS OF PULP; (B) SEPARATING THE VARIOUS FRACTIONS BY; (1) INTRODUCING THE SCREENED PULP IN A FIRST LIQUID MEANS PULP FRACTION SEPARATING ZONE, (2) TAKING A PORTION OF PULP FROM THE FIRST LIQUID MEANS PULP FRACTION SEPARATING ZONE FOR FURTHER PULP PROCESSING AND USE IN A FIRST PAPER WEB PRODUCING ROUTE, (3) TAKING THE REMAINDER OF PULP FROM THE FIRST LIQUID MEANS PULP FRACTION SEPARATING ZONE AND INTRODUCING SAID REMAINDER INTO A SECOND LIQUID MEANS PULP FRACTION SEPARATING ZONE, (4) TAKING A PART OF THE SECOND LIQUID MEANS PULP FRACTION SEPARATING ZONE ACCEPT EFFLUENT OBTAINED BY: (A) COMBINING THE ACCEPT EFFLUENT RECYCLED TO SAID SECOND ZONE FROM A THIRD LIQUID MEANS PULP FRACTION SEPARATING ZONE ACCEPT EFFLUENT WHICH, IN TURN, HAS BEEN MADE UP OF A FOURTH LIQUID MEANS PULP FRACTION SEPARATING ZONE ACCEPT EFFLUENT COMBINED AND INTRODUCED INTO THE THIRD LIQUID ZONE WITH THE REJECT EFFLUENT FROM SAID SECOND LIQUID ZONE, AND (B) THE SAID REMAINDER OF PULP FROM SAID FIRST ZONE AND FURTHE PULP PROCESSING AND USE IN A SECOND PAPER WEB PRODUCING ROUTE; (5) SAID FIRST, SECOND, THIRD AND FOURTH LIQUID PULP FRACTION SEPARATING ZONES BEING CHARACTERIZED BY THE OBTAINED PULP FRACTIONS POSSESSING THE PRESELECTED DIFFERING PHYSICAL AND CHEMICAL PROPERTIES WHEN SAID PULP FRACTIONS ARE FURTHER SUBJECTED TO SUBSEQUENT PULP PROCESSING STEPS; (6) THE SAID FIRST, SECOND, THIRD AND FOURTH LIQUID PULP FRACTION SEPARATING ZONES BEING FURTHER CHARACTERIZED BY SAID PULP FRACTIONS POSESSING THE SELECTED PROPERTIES WHEN SAID PULP FRACTIONS ARE INCORPORATED IN THE FINAL PAPER WEB.