公开(公告)号：US4086129A

公开(公告)日：1978-04-25

申请号：US628328

申请日：1975-11-03

申请人： Romeo John Conca ,  John Patrick Gray ,  Tod Hunter Sloan

发明人： Romeo John Conca ,  John Patrick Gray ,  Tod Hunter Sloan

IPC分类号： D21C3/04 ,  D21C3/22 ,  G01N21/20 ,  D21C7/12

CPC分类号： D21C3/228 ,  Y10T436/186

摘要： A process for accurately controlling the intrinsic viscosity of sulfite pulp at the termination of a digestion operation comprising predetermining the duration of digestion time required to obtain a given pulp intrinsic viscosity for a range of initial weight ratios of combined SO.sub.2 to wood, determining during the digestion operation the initial weight ratio of combined SO.sub.2 to wood by measuring the rate of change of absorbance in the digestion cooking liquor and terminating the digestion operation at a time corresponding to the predetermined time required to obtain the given pulp intrinsic viscosity at the aforesaid combined SO.sub.2 to wood ratio.

摘要翻译： 在消解操作终止时精确控制亚硫酸盐纸浆的特性粘度的方法，包括预先确定在消化过程中确定组合的SO2与木材的初始重量比范围内获得给定纸浆特性粘度所需的消化时间的持续时间 通过测量消化蒸煮液中的吸光度变化率来操作组合的SO2与木材的初始重量比，并在与上述组合的SO2获得给定纸浆特性粘度所需的预定时间相符的时间终止消化操作， 木比。