公开(公告)号：US5907057A

公开(公告)日：1999-05-25

申请号：US84626

申请日：1998-05-26

申请人： Grigory Ya. Mazo ,  Jacob Mazo ,  Barney Vallino, Jr. ,  Robert J. Ross

发明人： Grigory Ya. Mazo ,  Jacob Mazo ,  Barney Vallino, Jr. ,  Robert J. Ross

IPC分类号： C07C227/08 ,  C07C229/24 ,  C07C227/00 ,  C07C229/00

CPC分类号： C07C227/08

摘要： The present invention is directed to a method for the production of D,L-aspartic acid. The method comprises reacting an unsaturated dicarboxylic acid or anhydride, such as, maleic acid, fumaric acid, maleic anhydride, or mixtures thereof, with excess aqueous ammonia at an elevated temperature and pressure for a time sufficient to produce diammonium D,L-aspartate. The produced diammonium D,L-aspartate is then neutralized to D,L-aspartic acid. Excess unreacted ammonia and various by-products may be recycled and re-used in the method, thereby minimizing waste and reducing cost. The produced D,L-aspartic acid may be subsequently used to make polyaspartic acid.

公开(公告)号：US5872285A

公开(公告)日：1999-02-16

申请号：US661054

申请日：1996-06-10

申请人： Grigory Ya Mazo ,  Jacob Mazo ,  Barney Vallino, Jr. ,  Robert J. Ross

发明人： Grigory Ya Mazo ,  Jacob Mazo ,  Barney Vallino, Jr. ,  Robert J. Ross

IPC分类号： C07C227/08 ,  C07C229/24 ,  C07C227/00 ,  C07C229/00

CPC分类号： C07C227/08

摘要： The present invention is directed to a method for the production of D,L-aspartic acid. The method comprises reacting an unsaturated dicarboxylic acid or anhydride, such as, maleic acid, fumaric acid, maleic anhydride, or mixtures thereof, with excess aqueous ammonia at an elevated temperature and pressure for a time sufficient to produce diammonium D,L-aspartate. The produced diammonium D,L-aspartate is then neutralized to D,L-aspartic acid. Excess unreacted ammonia and various by-products may be recycled and re-used in the method, thereby minimizing waste and reducing cost. The produced D,L-aspartic acid may be subsequently used to make polyaspartic acid.

摘要翻译： 本发明涉及一种生产D，L-天冬氨酸的方法。 该方法包括使不饱和二羧酸或酸酐如马来酸，富马酸，马来酸酐或其混合物与过量氨水在升高的温度和压力下反应足以产生二铵D，L-天冬氨酸的时间。 然后将所产生的二铵D，L-天冬氨酸中和至D，L-天冬氨酸。 过量的未反应的氨和各种副产物可以在该方法中被再循环和重新使用，从而最小化浪费并降低成本。 产生的D，L-天冬氨酸可以随后用于制备聚天冬氨酸。

公开(公告)号：US4035347A

公开(公告)日：1977-07-12

申请号：US663010

申请日：1976-03-02

申请人： David B. Korzenski ,  Barney Vallino, Jr. ,  Wayne E. Zarnecki

发明人： David B. Korzenski ,  Barney Vallino, Jr. ,  Wayne E. Zarnecki

IPC分类号： C08F20/56 ,  C08F1/13 ,  C08F3/90 ,  C08F15/02

CPC分类号： C08F20/56 ,  Y10S526/909

摘要： A method for preparing substantially dry homopolymers and copolymers which comprises forming a polymeric latex or water-in-oil emulsion and partially inverting said latex by regulated contact time with water in the time span 0.5 - 10.0 seconds and preferably less than 1 second. A preferred operation is carried out in a static mixer where the contact time for inversion is regulated by the diameter or length of a cylindrical tube containing static baffles.

摘要翻译： 一种用于制备基本上干燥的均聚物和共聚物的方法，其包括形成聚合物胶乳或油包水乳液，并在时间跨度为0.5-10.0秒，优选小于1秒的情况下通过与水的调节接触时间部分地反转所述胶乳。 优选的操作在静态混合器中进行，其中反转的接触时间由包含静态挡板的圆柱形管的直径或长度来调节。