公开(公告)号：US4624745A

公开(公告)日：1986-11-25

申请号：US645978

申请日：1984-08-31

申请人： Walter E. Sande ,  Barrie D. Stroud ,  Dan P. Dumdie

发明人： Walter E. Sande ,  Barrie D. Stroud ,  Dan P. Dumdie

IPC分类号： B01D19/02 ,  B01D19/04 ,  D21C9/02 ,  D21C3/28

CPC分类号： B01D19/02 ,  B01D19/04 ,  D21C9/02

摘要： An apparatus for controlling the rate at which a defoaming agent is supplied to a processing vessel. A first sensing element senses the quantity of liquid in the vessel. A second sensing element senses the position of the upper surface of the foam. A signal processing circuit combines the outputs of the first and second sensing elements to produce a signal that is used to optimize the rate at which defoaming agent is supplied to the vessel. In this manner, the amount of defoaming agent that is used is reduced, thereby reducing the cost of operating the process.

摘要翻译： 一种用于控制将消泡剂供给到处理容器的速率的装置。 第一感测元件感测容器中的液体的量。 第二感测元件感测泡沫的上表面的位置。 信号处理电路组合第一和第二感测元件的输出以产生用于优化消泡剂供应给容器的速率的信号。 以这种方式，减少了使用的消泡剂的量，从而降低了操作过程的成本。

公开(公告)号：US5589030A

公开(公告)日：1996-12-31

申请号：US350835

申请日：1994-12-07

申请人： Walter E. Sande ,  Karl D. Sears

发明人： Walter E. Sande ,  Karl D. Sears

IPC分类号： D21C5/02

CPC分类号： D21C5/02 ,  Y02W30/648

摘要： This invention relates generally to a method for extracting lignosulfonate for the manufacture of vanillin and other specialty chemicals. Specifically, the invention relates to a method for recovering lignosulfonates from newsprint comprising the steps of:a) converting newsprint to a crumb pulp comprising of from about 20% to about 50% crumb pulp fiber solids by weight on an oven dry basis and the remainder water;b) cooking the crumb pulp in a medium comprising crumb pulp and cooking acid solution selected from the group consisting of sodium bisulfite, magnesium bisulfite, ammonium bisulfite, calcium bisulfite or mixtures thereof wherein the weight ratio of cooking acid solution to the crumb pulp fiber is from about 3 to about 6 for sufficient time and sufficient temperature and pressure for lignosulfonate removal;c) separating the crumb pulp fiber from the spent sulfite liquor; andd) recovering the lignosulfonates from the spent sulfite liquor.

摘要翻译： 本发明一般涉及用于制备香草醛和其它特种化学品的木素磺酸盐提取方法。 具体地说，本发明涉及从新闻纸回收木质素磺酸盐的方法，包括以下步骤：a）将新闻纸转化成碎纸浆，其包含按烘干干重计约20％至约50％ 水; b）在包含碎浆和选自亚硫酸氢钠，亚硫酸氢钠，亚硫酸氢铵，亚硫酸氢钠或其混合物的混合物中的碎屑浆和烹饪酸溶液的培养基中烹饪碎屑，其中烹饪酸溶液与碎浆纤维的重量比为 约3至约6，足够的时间和足够的木质素磺酸盐去除的温度和压力; c）将碎纸浆纤维与废亚硫酸盐液分离; 和d）从废亚硫酸盐液中回收木质素磺酸盐。