公开(公告)号：US5900112A

公开(公告)日：1999-05-04

申请号：US866710

申请日：1997-05-30

申请人： Richard J. Spontak ,  Joanna E. Roberts ,  Victoria A. Prevysh ,  Saad A Khan

发明人： Richard J. Spontak ,  Joanna E. Roberts ,  Victoria A. Prevysh ,  Saad A Khan

IPC分类号： D21C11/00 ,  D21C11/12 ,  D21C11/04

CPC分类号： D21C11/0092 ,  D21C11/12

摘要： A method of recycling sodium-based salts used for digesting wood in a digester during the manufacture of pulp and paper. The method comprises collecting a black liquor from the digester, concentrating the black liquor, and adding a salt to the black liquor in an amount sufficient to reduce the viscosity thereof. Preferred salts are thiocyanate salts. The black liquor is then oxidized to produce a green liquor and a causticizer added to the green liquor to produce a white liquor containing the sodium-based salts to be recycled. The white liquor is then returned to the digester.

摘要翻译： 在纸浆和纸制造过程中循环使用用于在蒸煮器中消化木材的钠盐的方法。 该方法包括从蒸煮器收集黑液，浓缩黑液，并向黑液中加入足以降低其粘度的量的盐。 优选的盐是硫氰酸盐。 然后黑液被氧化以产生绿液，并将苛性剂加入到绿液中以产生含有待再循环的钠基盐的白液。 然后将白酒送回消化器。