中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

23 records (took 0.026 seconds)

    11.
    发明专利
    未知

    公开(公告)号：BR0208249A

    公开(公告)日：2004-09-14

    申请号：BR0208249

    申请日：2002-03-06

    Applicant: STALEY MFG CO A E

    Inventor： COCKREM MICHAEL CHARLES MILNER ,  KOVACS ISTVAN

    IPC: B01D3/36 ,  C07C51/02 ,  C07C51/06 ,  C07C51/46 ,  C07C231/24 ,  C07C235/06 ,  B01D3/10 ,  B01D3/16 ,  B01D3/38 ,  C07C51/48 ,  C07C59/06 ,  C07C59/08 ,  C07C59/10 ,  C07C69/68

    Abstract: Disclosed herein are methods for the recovery of an organic acid, such as a heat stable lactic acid, from a feed stream which contains at least one of an organic acid amide, an organic acid ammonium salt, or an alkylamine-organic acid complex. The feed stream is mixed with at least one azeotroping agent. The azeotroping agent is a hydrocarbon capable of forming at least one azeotrope with the organic acid that is produced by the thermal decomposition of the amide, ammonium salt, or complex in the feed stream. Preferably the azeotrope is a heteroazeotrope. The mixture of the feed stream and the azeotroping agent is heated to produce a vapor stream. The azeotrope is a component of the vapor stream. The vapor stream can be condensed to a liquid stream, and the organic acid is recovered in the liquid stream that is produced. When the azeotrope is a heteroazeotrope, the vapor stream can be condensed into a liquid stream, which can be separated into a first phase and a second phase. The first phase contains the highest concentration of organic acid and the second phase contains azeotroping agent. The organic acid can be further purified and/or concentrated from the separated first phase or from the liquid stream.

    PROCESS FOR PURIFYING AN ORGANIC ACID
    13.
    发明专利
    PROCESS FOR PURIFYING AN ORGANIC ACID 未知

    公开(公告)号：CA2470978A1

    公开(公告)日：2003-07-24

    申请号：CA2470978

    申请日：2002-12-11

    Applicant: STALEY MFG CO A E

    Inventor： HEIDEL DAVID ,  MOHAMEDNUR IDRIS ,  COCKREM MICHAEL CHARLES MILNER ,  KOVACS ISTVAN ,  BANIEL AVRAHAM M

    IPC: C07C51/48 ,  C07C59/08

    Abstract: A process is disclosed for purifying an aqueous feed stream (10) comtaining a product organic acid and a strong contaminant such as another organic acid. The molar concentration of the organic acid in the feed stream (10) is at least 20 times greater than that of the contaminant. The feed stream (10) is contacted with an immiscible basic extractant (18) that has a greater affini ty for the contaminant and which complexes with the contaminant and some of the organic acid. The complexed extractant is separated from the aqueous stream (10), so as to produce a first effluent stream (20) comprising product organ ic acid. The complexed extractant is contacted with a displacing acid, for whic h the extractant has a greater affinity than contaminant or extractant. As a result, a second effluent stream (28) comprising organic acid and a third effluent stream (30) are produced.

    14.
    发明专利
    未知

    公开(公告)号：AT318255T

    公开(公告)日：2006-03-15

    申请号：AT99958972

    申请日：1999-11-16

    Applicant: STALEY MFG CO A E

    Inventor： COCKREM MICHAEL CHARLES MILNER

    IPC: C07C67/08 ,  C07B53/00 ,  C07B61/00 ,  C07C67/54 ,  C07C69/68 ,  C07C67/00 ,  C12P7/00 ,  C12P7/62 ,  C12P7/46

    Abstract: A process for producing an ester comprises the steps of: (a) feeding to a first vessel a feed that comprises organic acid, alcohol, and water, whereby organic acid and alcohol react to form monomeric ester and water, and whereby a first liquid effluent is produced that comprises as its components at least some ester, alcohol, and water, the components of the first liquid effluent being substantially in reaction equilibrium; and (b) feeding the first liquid effluent to a second vessel, whereby a vapor product stream and a second liquid effluent stream are produced, the vapor stream comprising ester, alcohol, and water, wherein the second vessel is maintained substantially at vapor-liquid equilibrium but not substantially at reaction equilibrium.

    AZEOTROPIC DISTILLATION OF CYCLIC ESTERS OF HYDROXY ORGANIC ACIDS
    16.
    发明专利
    AZEOTROPIC DISTILLATION OF CYCLIC ESTERS OF HYDROXY ORGANIC ACIDS 未知

    公开(公告)号：CA2440918A1

    公开(公告)日：2003-01-16

    申请号：CA2440918

    申请日：2002-03-06

    Applicant: STALEY MFG CO A E

    Inventor： KOVACS ISTVAN ,  COCKREM MICHAEL CHARLES MILNER

    IPC: B01D3/36 ,  C07C51/42 ,  C07C51/46

    Abstract: Cyclic esters of hydroxy organic acids can be produced and recovered via azeotropic distillation. In certain embodiments cyclic esters, such as glycolide and lactide, can be produced from a fermentation broth or other fe ed stream that comprises a hydroxy organic acid, an ammonium salt of a hydroxy organic acid, an amide of a hydroxy organic acid, or an ester of a hydroxy organic acid using azeotropic distillation. The hydroxy organic acid of the feed stream or the hydroxy organic acid derived from the feed stream by decomposition is reacted to produce the cyclic ester. In other embodiments a crude composition of a cyclic ester of an organic ester can be purified usin g azeotropic distillation.

    17.
    发明专利
    未知

    公开(公告)号：BR9916754A

    公开(公告)日：2001-08-14

    申请号：BR9916754

    申请日：1999-11-16

    Applicant: STALEY MFG CO A E

    Inventor： COCKREM MICHAEL CHARLES MILNER

    IPC: C07C67/08 ,  C07B53/00 ,  C07B61/00 ,  C07C67/54 ,  C07C69/68 ,  C07C67/00 ,  C12P7/00 ,  C12P7/62 ,  C12P7/46

    Abstract: A process for producing an ester comprises the steps of: (a) feeding to a first vessel a feed that comprises organic acid, alcohol, and water, whereby organic acid and alcohol react to form monomeric ester and water, and whereby a first liquid effluent is produced that comprises as its components at least some ester, alcohol, and water, the components of the first liquid effluent being substantially in reaction equilibrium; and (b) feeding the first liquid effluent to a second vessel, whereby a vapor product stream and a second liquid effluent stream are produced, the vapor stream comprising ester, alcohol, and water, wherein the second vessel is maintained substantially at vapor-liquid equilibrium but not substantially at reaction equilibrium.

    PROCESS FOR PRODUCTION OF ESTERS
    18.
    发明专利
    PROCESS FOR PRODUCTION OF ESTERS 未知

    公开(公告)号：CA2347689C

    公开(公告)日：2009-01-27

    申请号：CA2347689

    申请日：1999-11-16

    Applicant: STALEY MFG CO A E

    Inventor： COCKREM MICHAEL CHARLES MILNER

    IPC: C07C67/08 ,  C07B53/00 ,  C07B61/00 ,  C07C67/54 ,  C07C69/68

    Abstract: A process for producing an ester comprises the steps of: (a) feeding to a first vessel a feed that prises organic acid, alcohol, and water, whereby organic acid and alcohol react to form monomeric ester and water, and whereby a first liquid effluent is produced that comprises as its components at least some ester, alcohol, and water, the components of the first liquid effluent being substantially in reaction equilibrium; and (b) feeding the first liquid effluent to a second vessel, whereby a vapor product stream and a second liquid effluent stream are produced, the vapour stream comprising ester, alcohol, and water, wherein the second vessel is maintained substantially at vapor-liquid equilibrium but not substantially at reaction equilibrium.

Patent Agency Ranking