公开(公告)号：US3824108A

公开(公告)日：1974-07-16

申请号：US82353569

申请日：1969-05-05

Applicant: DYNAMIT NOBEL AG

Inventor： STOETZER E ,  WASSMUTH H ,  ABRAHAM A

IPC: C06B21/00 ,  C08B5/04 ,  C09D101/18 ,  C08B21/12

CPC classification number: C09D101/18 ,  C06B21/0066 ,  C08B5/04

Abstract: PROCESS OF PREPARING NITROCELLULOSE GRANULES HAVING A BULK DENSITY OF BETWEEN 0.4 AND 0.6 G./CM3 FROM A NITROCELLULOSE LACQUER PREPARED BY STIRRING UNDER WATER NITROCELLULOSE STABILIZERS AND A NITROCELLULOSE SOLVENT INSOLUBLE IN THE WATER, ADDING TO THE LACQUER STILL BEING STIRRED A PROTECTIVE COLLOID AND A WATER-SOLUBLE ALKALI METAL OR ALKALINE EARTH METAL SALT, THEREAFTER REDUCING THE STIRRING SPEED WHEREUPON THE LACQUER BREAKS UP INTO DROP-LIKE PARTICLES, FURTHER REDUCING THE STIRRING SPEED AS TO CAUSE THE PARTICLES, OF LACQUER TO FLOW TOGETHER AGAIN,MAKING A SECOND ADDITION OF PROTECTIVE COLLOID AND SALT, THEN INCREASING THE STIRRING SPEED CAUSING THE LACQUER TO BREAK UP AND FORM THE DESIRED PARTICLES AND THEREAFTER DISTILLING OFF THE SOLVENT.