公开(公告)号：US20110073264A1

公开(公告)日：2011-03-31

申请号：US12855176

申请日：2010-08-12

Applicant: Shijie Liu ,  Gangesh Mishra ,  Thomas E. Amidon ,  Kathryn E. Gratien ,  Jennifer A. Putnam

Inventor： Shijie Liu ,  Gangesh Mishra ,  Thomas E. Amidon ,  Kathryn E. Gratien ,  Jennifer A. Putnam

IPC: D21C1/02 ,  D21C3/22 ,  D21C3/02

CPC classification number: D21C1/02 ,  D21C3/02 ,  D21C3/22

Abstract: The method of the present invention is directed towards a method to increase the pulp yield of a lignocellulosic material, or increasing pulp bulk and/or pulp viscosity. This method comprises the following steps; preparing a lignocellulosic material, contacting the lignocellulosic material in a vessel with hot water or steam for a predetermined time, producing acetic acid from the reaction of the hot water or steam and the lignocellulosic material, lowering the pH to less than about 4, removing lignocellulosic material extracts including a large percentage of hemicellulose, acetic acid and metal ions, exposing contacted lignocellulosic material to pulping chemicals in a pulping reactor, forming a contacted lignocellulosic material pulp with a kappa number below about 19 after about 90 minutes of contact with the pulping chemicals, exposing the contacted lignocellulosic material pulp to whitening agents, and producing a whitened hot water contacted lignocellulosic material pulp.

Abstract translation: 本发明的方法涉及增加木质纤维素材料的纸浆产率或增加纸浆体积和/或纸浆粘度的方法。 该方法包括以下步骤： 制备木质纤维素材料，将容器中的木质纤维素材料与热水或蒸汽接触预定时间，从热水或蒸汽与木质纤维素材料的反应产生乙酸，将pH降低至小于约4，除去木质纤维素 材料提取物，包括大量的半纤维素，乙酸和金属离子，将接触的木质纤维素材料暴露于制浆反应器中的制浆化学品中，在与制浆化学品接触约90分钟后形成接触的木质纤维素材料纸浆，卡巴数低于约19 ，将接触的木质纤维素浆料暴露于增白剂中，以及生产白化的热水接触的木质纤维素材料浆。