公开(公告)号：US5906926A

公开(公告)日：1999-05-25

申请号：US969481

申请日：1997-11-13

申请人： Gerhard Keunecke ,  Henryk Struszczyk ,  Wlodzimierz Mikolajczyk ,  Pawel Starostka ,  Alojzy Urbanowski

发明人： Gerhard Keunecke ,  Henryk Struszczyk ,  Wlodzimierz Mikolajczyk ,  Pawel Starostka ,  Alojzy Urbanowski

IPC分类号： C08B15/06 ,  C12S3/04

CPC分类号： C08B15/06

摘要： A method for the manufacture of cellulose carbamate, whereby cellulose pulp is preliminarily activated by alkaline, hydrothermal and/or enzymatic treatment, then the activated cellulose pulp is mixed with aqueous urea solution, the water in the solution replaced with an organic reaction carrier, and thereafter the cellulose is reacted with urea in the liquid phase to yield cellulose carbamate, which is separated from the liquid medium and washed. The method results in uniform substitution and distribution of carbamate groups and in cellulose chain, which leads to good solubility of the cellulose carbamate in aqueous alkali solution as well as excellent spinnability for producing fibers, films, and other products.

摘要翻译： 一种制造纤维素氨基甲酸酯的方法，其中纤维素纸浆通过碱，水热和/或酶处理预先活化，然后将活化的纤维素纸浆与尿素水溶液混合，溶液中的水被有机反应载体代替， 然后将纤维素与液相中的尿素反应，得到纤维素氨基甲酸酯，其与液体介质分离并洗涤。 该方法导致氨基甲酸酯基团和纤维素链中的均匀取代和分布，这导致纤维素氨基甲酸酯在碱性水溶液中的良好溶解性以及用于生产纤维，膜和其它产品的优异的可纺性。

公开(公告)号：US6106763A

公开(公告)日：2000-08-22

申请号：US192772

申请日：1998-11-16

申请人： Henryk Struszczyk ,  Dariusz Wawro ,  Pawel Starostka ,  Wlodzimierz Mikolajczyk ,  Alojzy Urbanowski

发明人： Henryk Struszczyk ,  Dariusz Wawro ,  Pawel Starostka ,  Wlodzimierz Mikolajczyk ,  Alojzy Urbanowski

IPC分类号： A22C13/00 ,  C08B1/00 ,  D01F2/02 ,  B29C55/28 ,  D01F2/00

CPC分类号： C08B1/003 ,  A22C13/0013 ,  D01F2/02

摘要： Process for producing cellulosic moldings such as fibers, foils, casings and beads from cellulose, wherein (a) the initial cellulose is hydrothermally treated with water in a water/cellulose ratio on a weight basis of at least 1 at a temperature in the range from about 100.degree. to about 200.degree. C. and under a pressure in the range from 0.1 to about 1.5 MPa; (b) the treated cellulose is dissolved in an aqueous solution of alkali hydroxide at a temperature of at least 0.degree. C. to form a homogenous cellulose solution containing from about 5% to about 10% by weight cellulose and at maximum 10% by weight alkali hydroxide, and (c) the alkaline cellulose solution is formed and coagulated by contacting it with an aqueous solution containing 1 to about 30% by weight of an acid. This fully ecological process avoids handling of toxic products or by-products and uses aqueous solvents instead of expensive organic solvents. The cellulose solution is stable for at least 48 hours.

摘要翻译： 用于从纤维素生产纤维素模制品如纤维，箔，肠衣和珠粒的方法，其中（a）将初始纤维素在水/纤维素比中用水进行水热处理，重量基于至少1，温度范围为 约100至约200℃，压力范围为0.1至约1.5MPa; （b）将经处理的纤维素在至少0℃的温度下溶解在碱金属氢氧化物水溶液中以形成含有约5％至约10％重量的纤维素和最多10％重量的均匀纤维素溶液 碱性氢氧化物，和（c）通过使碱性纤维素溶液与含有1至约30重量％的酸的水溶液接触而形成和凝结。 这种完全生态的过程避免了处理有毒产品或副产物，并使用水性溶剂而不是昂贵的有机溶剂。 纤维素溶液稳定至少48小时。