Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
Home › Process for oxygen bleaching using two vertical reactors

Process for oxygen bleaching using two vertical reactors

US Patent 5217575 · Granted Jun 8, 1993

Assignee

Inventors

View full patent text on Google Patents →

More Patents by These Inventors

Totally chlorine free bleaching process using recovered filtrate2002
Digester having screening arrangement for isothermal cooking of fibrous material2000
Method of continuously isothermally cooking of pulp1999
Screen system for a continuous digester1998
Process for isothermal cooking pulp in a continuous digester1998
Method for the recovery of energy and chemicals from cellulose spent liquor cont1998
Method for bleaching pulp with hydrogen peroxide recovered from cellulosic spent1997
Process for operating a digester1997
Digester for cooking pulp having staggered circular screens for isothermal cooki1996
Process for controlling the flow of cellulosic fiber material through an impregn1996
Digester for cooking pulp having staggered screens1995
Process for bleaching pulp without using chlorine containing chemicals1995