公开(公告)号：EP0941357A4

公开(公告)日：2004-11-17

申请号：EP97947359

申请日：1997-11-04

Applicant: STALEY MFG CO A E

Inventor： EYAL AHARON M ,  LEHNHARDT WILLIAM F

IPC: C12P7/40 ,  C12P7/56 ,  C12P1/04 ,  C12P7/46 ,  C12P7/62

CPC classification number: C12P7/56 ,  C12P7/40 ,  Y10S435/803

Abstract: A process is described for producing organic acids such as lactic acid. The process includes the steps of producing lactic acid by fermentation, resulting in an aqueous fermentation broth containing lactic acid, and adding a calcium base, such as calcium carbonate, to the fermentation broth, thereby producing calcium lactate in the broth. Biomass is removed from the broth, thereby leaving an aqueous solution or dispersion of calcium lactate. The calcium lactate is reacted with a source of ammonium ions, such as ammonium carbonate, or a mixture of ammonia and carbon dioxide, thereby producing an ammonium lactate. Contaminating cations can be removed by ion exchange. The free lactic acid or a derivative thereof can be separated from the ammonium ions, preferably by salt-splitting electrodialysis.

公开(公告)号：CA2270522A1

公开(公告)日：1998-05-28

申请号：CA2270522

申请日：1997-11-04

Applicant: STALEY MFG CO A E

Inventor： LEHNHARDT WILLIAM F ,  EYAL AHARON M

IPC: C12P7/40 ,  C12P7/56 ,  C12P1/04 ,  C12P7/46 ,  C12P7/62

Abstract: A process is described for producing organic acids such as lactic acid. The process includes the steps of producing lactic acid by fermentation, resulting in an aqueous fermentation broth containing lactic acid, and adding a calcium base, such as calcium carbonate, to the fermentation broth, thereby producing calcium lactate in the broth. Biomass is removed from the broth, thereby leaving an aqueous solution or dispersion of calcium lactate. The calcium lactate is reacted with a source of ammonium ions, such as ammonium carbonate, or a mixture of ammonia and carbon dioxide, thereby producing an ammonium lactate. Contaminating cations can be removed by ion exchange. The free lactic acid or a derivative thereof can be separated from the ammonium ions, preferably by salt-splitting electrodialysis.

公开(公告)号：IL119986A

公开(公告)日：2000-10-31

申请号：IL11998697

申请日：1997-01-09

Applicant: AMYLUM NV ,  STALEY MFG CO A E

Inventor： EYAL AHARON M ,  VITNER ASHER ,  CAMI PIERRE ,  JANSEN ROBERT ,  JARRY BRUNO ,  LECOMTE D ,  SCOTT JEAN ,  CHATTAWAY THOMAS ,  LANCKER F VAN

IPC: C07C227/42 ,  C07C229/24 ,  C08G69/10 ,  C08G73/10 ,  C12P7/46 ,  C12P13/20 ,  C07C227/00

公开(公告)号：IL118892A

公开(公告)日：2000-08-13

申请号：IL11889296

申请日：1996-07-18

Applicant: AMYLUM NV ,  STALEY MFG CO A E

Inventor： EYAL AHARON M ,  CAMI PIERRE ,  PILON ROBERT

IPC: C07C227/40 ,  C07C227/42 ,  C07C229/24 ,  C08G73/10 ,  C12P13/20

公开(公告)号：AU5245998A

公开(公告)日：1998-06-10

申请号：AU5245998

申请日：1997-11-04

Applicant: STALEY MFG CO A E

Inventor： EYAL AHARON M ,  LEHNHARDT WILLIAM F

IPC: C12P7/40 ,  C12P7/56 ,  C12P1/04 ,  C12P7/46 ,  C12P7/62