发明名称 |
Reducing wax content and enhancing quality of recycled pulp from OCC and waste paper |
摘要 |
A system and method for treating a waxed fiber paper product with a high wax content to remove a substantial portion of the wax content includes the pulping of the wax paper fiber at an elevated temperature in excess of the melting temperature of the wax to separate a pulp fraction and to form an emulsion of water and molten wax. The pulp fraction is separated from the emulsion by filtering in a reverse pressure screen in which a finely perforated screen defines a high pressure side and a low pressure side, and a major portion of the water/emulsion is removed from the suspension through the screen perforations leading from the high pressure side to the low pressure side, in which a rotor and foil arrangement within the reverse screen is operated under such conditions that the suspension at the high pressure side of the screen is maintained in a constant fluidized condition.
|
申请公布号 |
US6053439(A) |
申请公布日期 |
2000.04.25 |
申请号 |
US19970908988 |
申请日期 |
1997.08.08 |
申请人 |
INLAND PAPERBOARD AND PACKAGING, INC.;THERMO BLACK CLAWSON INC. |
发明人 |
LOCKE, RALPH E.;PRENTICE, GARY N.;VITORI, CHRISTOPHER M. |
分类号 |
B02C19/00;D21B1/32;D21D5/02;(IPC1-7):B02C19/12;B02C23/08 |
主分类号 |
B02C19/00 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|