公开(公告)号：US5723098A

公开(公告)日：1998-03-03

申请号：US706473

申请日：1996-09-04

申请人： Herbert Salzburg ,  Georg Steinhoff ,  Heiko Hoffmann ,  Helmut Kaponig

发明人： Herbert Salzburg ,  Georg Steinhoff ,  Heiko Hoffmann ,  Helmut Kaponig

IPC分类号： B01J23/22 ,  B01J23/72 ,  B01J35/12 ,  B01J38/74 ,  C07B61/00 ,  C07C51/27 ,  C07C51/47 ,  C07C55/14 ,  C07C55/00 ,  C01G49/00 ,  C02F1/42

CPC分类号： C07C51/47

摘要： The invention relates to a process for the selective recovery of catalysts used in the production of adipic acid by (a) separating adipic acid from the reaction solution, (b) exposing the resultant reaction solution to a sulfonated ion exchanger, thereby binding iron, copper, and vanadium ions to said sulfonated ion exchanger, (c) separating the ion-exchanger from the reaction solution, (d) washing the separated ion exchanger with nitric acid to obtain an acid eluate, and (e) exposing the acid eluate to an ion exchanger modified with aminophosphonic acid groups, thereby removing the iron ions from the acid eluate.

摘要翻译： 本发明涉及通过（a）从反应溶液中分离己二酸来选择性回收用于生产己二酸的催化剂的方法，（b）将所得反应溶液暴露于磺化离子交换剂中，由此将铁，铜 和钒离子与所述磺化离子交换剂反应，（c）将离子交换剂与反应溶液分离，（d）用硝酸洗涤分离的离子交换剂以得到酸洗脱液，和（e）将酸洗脱液暴露于 离子交换剂用氨基膦酸基团修饰，从而从酸洗脱液中除去铁离子。

公开(公告)号：US5587511A

公开(公告)日：1996-12-24

申请号：US556572

申请日：1995-11-13

申请人： Herbert Salzburg ,  Georg Steinhoff ,  Andreas Gosch ,  Gerd Hufen

发明人： Herbert Salzburg ,  Georg Steinhoff ,  Andreas Gosch ,  Gerd Hufen

IPC分类号： C07C51/43 ,  C07C51/47 ,  C07C51/48 ,  C07C55/12 ,  C07C55/14 ,  C07C51/00

CPC分类号： C07C51/43

摘要： The present invention relates to a process for obtaining adipic acid from the aqueous nitric acid mother liquors that arise during industrial adipic acid production by(i) removing nitric acid from the aqueous mother liquor by evaporation to a concentrate having a residual content of at most about 2.5 wt. % of HNO.sub.3,(ii) mixing the concentrate obtained according to step (i) with water or dilute aqueous nitric acid in a quantity corresponding to a weight ratio of solid to liquid of about 1:2.1 to about 1:1.2,(iii) allowing the water added in step (ii) or the nitric acid added in step (ii) to act upon the concentrate for at least about 10 minutes at about 20.degree. to about 80.degree. C., and(iv) separating adipic acid as crystals that are formed (1) during step (iii) at temperatures of no more than about 35.degree. C. or (2) after step (iii) by cooling the mixture from step (iii) to about 10.degree. to about 35.degree. C.

摘要翻译： 本发明涉及一种从工业己二酸生产过程中产生的硝酸母液中获得己二酸的方法，该方法是（i）通过蒸发从含水母液中除去硝酸至具有至多约 2.5重量％ ％的HNO 3，（ii）将根据步骤（i）获得的浓缩物与水或稀的硝酸水溶液混合，其量相当于固体与液体的重量比为约1：2.1至约1：1.2，（iii） 允许在步骤（ii）中加入的水或步骤（ii）中加入的硝酸在约20℃至约80℃下对浓缩物作用至少约10分钟，和（iv）将己二酸分离成晶体 在步骤（iii）中在不超过约35℃的温度下形成（1）或（2）在步骤（iii）之后通过将步骤（iii）的混合物冷却至约10℃至约35℃来形成（1）

公开(公告)号：US5264624A

公开(公告)日：1993-11-23

申请号：US841958

申请日：1992-02-26

申请人： Peter Vogtel ,  Georg Steinhoff

发明人： Peter Vogtel ,  Georg Steinhoff

IPC分类号： C07C51/43 ,  C07C55/14 ,  C07C51/42

CPC分类号： C07C51/43

摘要： This invention relates to a process for the recovery of adipic acid from mother liquors collected during commercial production of adipic acid, wherein said mother liquors contain from 52 to 60% by weight of nitric acid calculated as HNO.sub.3, not taking into account the organic constituents, from 2 to 6% by weight of succinic acid, from 4 to 9% by weight of glutaric acid, and from 5 to 10% by weight of adipic acid, by selective crystallization of the adipic acid dissolved in said mother liquors by(a) adding an aqueous adipic acid solution having an adipic acid content of from 0.5 to 6% by weight to said mother liquor in the temperature range of from 30.degree. to 60.degree. C. in such a quantity that the concentration of nitric acid in the mixture is reduced to 35 to 50% by weight;(b) cooling the mixture by at least 5 degrees Celsius within a period of from 0.5 to 5 hours to induce crystallization of the adipic acid;(c) isolating the crystallized adipic acid by filtration; and(d) transferring the filtrate obtained in step (c) to a distillation apparatus for distillative workup of the glutaric acid contained therein.

摘要翻译： 本发明涉及从己二酸的商业生产过程中收集的母液中回收己二酸的方法，其中所述母液含有52至60重量％的以HNO 3计算的硝酸，不考虑有机成分， 通过（a）通过选择性结晶溶解在所述母液中的己二酸，将琥珀酸的重量计为2至6％，4至9％重量的戊二酸和5至10％重量的己二酸， 将己二酸含量为0.5〜6重量％的己二酸水溶液在30〜60℃的温度范围内加入到所述母液中，使得混合物中的硝酸浓度为 减少到35〜50重量％ （b）在0.5至5小时的时间内将混合物冷却至少5摄氏度，以诱导己二酸的结晶; （c）通过过滤分离结晶的己二酸; 和（d）将步骤（c）中获得的滤液转移到其中所含的戊二酸的蒸馏处理用蒸馏装置中。