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    A PROCESS FOR RECOVERY OF ACID
    111.
    发明专利
    A PROCESS FOR RECOVERY OF ACID 未知

    公开(公告)号：CA2386852A1

    公开(公告)日：2001-04-19

    申请号：CA2386852

    申请日：2000-09-17

    Applicant: STALEY MFG CO A E

    Inventor： BANIEL AVRAHAM

    IPC: B01D11/04 ,  C07C51/48 ,  C07C51/487 ,  C07C51/493 ,  C07C67/08 ,  C07C67/26 ,  C07C69/68 ,  C07C69/704 ,  C08G63/06 ,  C07C59/08 ,  C07C59/265 ,  C07D319/12

    Abstract: The invention provides a process for the conversion of an extracted carboxyl ic acid to a non-ionized derivative thereof, comprising contacting a carboxylic acid containing aqueous solution with a water-insoluble amine solvent, to recover acid therefrom and to form an extract carrying amine-bound carboxyli c acid, characterized in that said extract is contacted with a concentrated aqueous solution of said same acid of high concentration, whereby additional acid is transferred to said extract to form a loaded extract and said loaded extract is reacted to form a non-ionized derivative of said acid, by reactio ns known per se, whereby said acid is converted into a non-ionised derivative form and said amine solvent is liberated for recycling.

    Process for producing glutamic acid
    113.
    发明专利
    Process for producing glutamic acid 未知

    公开(公告)号：IL116848A

    公开(公告)日：2000-06-01

    申请号：IL11684896

    申请日：1996-01-22

    Applicant: AMYLUM NV ,  STALEY MFG CO A E

    Inventor： CAMI PIERRE ,  EYAL AHARON

    IPC: C07C227/28 ,  C07C227/40 ,  C07C229/24 ,  C07C227/00

    Abstract: PCT No. PCT/GB97/00177 Sec. 371 Date Oct. 7, 1998 Sec. 102(e) Date Oct. 7, 1998 PCT Filed Jan. 21, 1997 PCT Pub. No. WO97/27170 PCT Pub. Date Jul. 31, 1997An indirect acidulation process for producing glutamic acid from an aqueous feed containing a glutamate resulting from fermentation includes: a) contacting an aqueous feed stream at an elevated temperature with a weak acid cation exchanger (WACE) which is at least partially in its acid form, whereby a part of the cations in the solution is taken up by the cation exchanger and protons are introduced into the solution; b) contacting a second aqueous feed containing glutamate and cations at an elevated temperature with a strong acid cation exchanger (SACE) that is obtained from a subsequent step and carries cationic glutamate, whereby the cationic glutamate is transferred into the solution and most of the cations in the second aqueous feed are taken up by the SACE; c) crystallizing glutamic acid from the effluent of step (b); d) contacting the mother liquor of step (c) with the SACE which is at least partially in its acid form whereby cationic glutamate is bound; e) utilizing the SACE obtained in step (d) in step (b); f) regenerating the SACE from step (b) to its at least partially acid form by a solution of a strong acid and utilizing the SACE in its at least partially acid form in step (d) while forming an effluent containing an acidic solution of salts, comprising cations bound to the cation exchanger in step (b) and the anions of the strong acid; g) regenerating the WACE from step (a) to its at least partially acid form by the effluent from step (f) and utilizing the WACE in its at least partially acid form in step (a) while forming an effluent containing a solution of salts, comprising cations bound to the cation exchangers in steps (a) and (b) and the anions of the strong acid; and h) directing the salt solution obtained as the effluent of step (g) for commercial use.

    PRODUCTION AND RECOVERY OF ORGANIC ACIDS
    120.
    发明专利
    PRODUCTION AND RECOVERY OF ORGANIC ACIDS 未知

    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.

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