公开(公告)号：US20070066847A1

公开(公告)日：2007-03-22

申请号：US11228378

申请日：2005-09-16

申请人： Joseph Zaher ,  Bryan Fritzler ,  Scott Hutchison

发明人： Joseph Zaher ,  Bryan Fritzler ,  Scott Hutchison

IPC分类号： C07C55/06

CPC分类号： C07C51/02 ,  Y02P20/582 ,  C07C55/06

摘要： A process for the manufacture of oxalic acid dihydrate in which an aqueous solution of sodium oxalate is contacted with hydrochloric acid and the resulting mixture then cooled to precipitate oxalic acid, followed by optional recovery and recycling of the sodium oxalate and hydrochloric acid into the reaction chamber.

公开(公告)号：US20070197835A1

公开(公告)日：2007-08-23

申请号：US11724720

申请日：2007-03-16

申请人： Joseph Zaher ,  Bryan Fritzler ,  Scott Hutchison

发明人： Joseph Zaher ,  Bryan Fritzler ,  Scott Hutchison

IPC分类号： C07C51/42

CPC分类号： C07C51/02 ,  Y02P20/582 ,  C07C55/06

摘要： A process for the manufacture of oxalic acid dihydrate in which an aqueous solution of sodium oxalate is contacted with hydrochloric acid and the resulting mixture then cooled to precipitate oxalic acid, followed by optional recovery and recycling of the sodium oxalate and hydrochloric acid into the reaction chamber.