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Control of slime in paper-making using ultra-violet irradiated silver fluoride

  • US 3,230,137 A
  • Filed: 03/22/1961
  • Issued: 01/18/1966
  • Est. Priority Date: 03/22/1961
  • Status: Expired due to Term
First Claim
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1. PAPER PULP STOCK CONTAINING AS A SLIME CONTROL AGENT 0.5 TO 100 P.P.M., BASED ON THE WEIGHT OF SAID STOCK, OF ULTRA-VIOLET-IRRADIATED SILVER FLUORIDE IN ADMIXTURE WITH A SMALL AMOUNT OF COLLOIDAL SILVER PRODUCED BY SAID ULTRAVIOLET IRRADIATION, SAID ULTRA-VIOLET IRRADIATED SILVER FLUORIDE BEING PRODUCED BY THE IRRADIATION OF AN AQUEOUS SOLUTION OF SILVER FLUORIDE WITH IRRADIATION RAYS WHICH ARE AT LEAST ABOUT 95% IN THE ULTRA-VIOLET SPECTRUM FOR AT LEAST ABOUT SIX MINUTES PER GALLON OFTHE ULTRA-VIOLET IRRADIATED, AQUEOUS SILVER FLUORIDE SOLUTION TO OBTAIN SAID ADMIXTURE.

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