利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

9 条记录 (耗时 0.042 秒)

    Process for the recovery of organic acids from aqueous solutions
    7.
    发明授权
    Process for the recovery of organic acids from aqueous solutions 失效
    从水溶液中回收有机酸的方法

    公开(公告)号：US06670505B1

    公开(公告)日：2003-12-30

    申请号：US09519936

    申请日：2000-03-07

    申请人： Nick Allen Collins ,  Mark Robert Shelton ,  George William Tindall ,  Steven Thomas Perri ,  Ruairi Seosamh O'Meadhra ,  Chester Wayne Sink ,  Bhaskar Krishna Arumugam ,  John Clark Hubbs

    发明人： Nick Allen Collins ,  Mark Robert Shelton ,  George William Tindall ,  Steven Thomas Perri ,  Ruairi Seosamh O'Meadhra ,  Chester Wayne Sink ,  Bhaskar Krishna Arumugam ,  John Clark Hubbs

    IPC分类号： C07C5142

    CPC分类号： C07C51/43 ,  Y02P20/582 ,  Y10S435/803 ,  Y10S435/876 ,  Y10S435/896 ,  C07C59/347

    摘要： A process for recovering a desired organic acid from a solution includes the steps of: providing an aqueous solution including at least one desired organic acid or its acid anion; adjusting the proton concentration in the aqueous solution to a desired level, with the desired proton concentration being selected, at least in part, by the amount of available protons needed to associate with the acid anions of the desired organic acid(s) to be recovered and/or acid anions that are weaker than the desired organic acids; and recovering at least a portion of the at least one desired organic acid from the aqueous phase. The desired proton concentration can be based on the amount of available protons being greater than, less than or substantially equal, to the amount of protons needed to associate with the anion of the desired organic acid(s) and acid anions that are weaker than the desired organic acid(s). Specific examples of suitable organic acids include, but are not limited to, ascorbic, succinic, tartaric, glyconic, gulonic, citric, lactic, hialic, maleic, acetic, formic, gluconic pyruvic, propionic, butyric, itaconic acids and mixtures thereof. One embodiment of the present invention relates to the recovery of 2-keto-L-gulonic acid (KLG) from aqueous solutions such as fermentation baths.

    摘要翻译： 从溶液中回收所需有机酸的方法包括以下步骤：提供包含至少一种所需有机酸或其酸阴离子的水溶液; 将所述水溶液中的质子浓度调节到所需的水平，其中所需质子浓度至少部分地被选择与需要回收的所需有机酸的酸性阴离子缔合所需的可用质子的量 和/或弱于所需有机酸的酸性阴离子; 以及从所述水相中回收所述至少一种所需有机酸的至少一部分。 期望的质子浓度可以基于可用质子的量大于，小于或基本上等于与所需有机酸的阴离子和酸阴离子相比所需的质子的量，其弱于 合适的有机酸的具体实例包括但不限于抗坏血酸，琥珀酸，酒石酸，葡萄糖酸，古洛糖酸，柠檬酸，乳酸，唾液酸，马来酸，乙酸，甲酸，葡萄糖酸，丙酸，丙酸，丁酸， 衣康酸及其混合物。 本发明的一个实施方案涉及从水溶液如发酵浴中回收2-酮-L-古洛糖酸（KLG）。

    Preparation of esters of carboxylic acids
    8.
    发明授权
    Preparation of esters of carboxylic acids 失效
    羧酸酯的制备

    公开(公告)号：US06518454B1

    公开(公告)日：2003-02-11

    申请号：US09975872

    申请日：2001-10-12

    申请人： Bhaskar Krishna Arumugam ,  Larry Wayne Blair ,  Brendan William Boyd ,  Nick Allen Collins ,  David Anthony Larkin ,  Steven Thomas Perri ,  Chester Wayne Sink

    发明人： Bhaskar Krishna Arumugam ,  Larry Wayne Blair ,  Brendan William Boyd ,  Nick Allen Collins ,  David Anthony Larkin ,  Steven Thomas Perri ,  Chester Wayne Sink

    IPC分类号： C07C6702

    CPC分类号： C07C67/08 ,  C07C69/68 ,  C07C69/716

    摘要： Disclosed is a process wherein a solution of a carboxylic acid in a first solvent and an alcohol are fed to a simulated moving bed reactor (SMBR) containing a solid(s) to produce a first stream comprising a solution of an ester of the carboxylic acid and the alcohol and a second stream comprising the first solvent. The solid(s) present in the SMBR facilitates the esterification reaction and the separation of the first solvent from the carboxylic acid. The process is particularly valuable for the preparation of an alkanol solution of an alkyl 2-keto-L-gulonate ester (AKLG) from an aqueous fermentation broth containing dissolved 2-keto-L-gulonic acid (KLG) by feeding the fermentation broth and an alkanol to a simulated moving bed reactor which contains a solid acidic esterification catalyst to produce a stream comprising an alkanol solution of an ALKG. The alkanol solution of an ALKG may be used directly to convert the ALKG to ascorbic acid (Vitamin C).

    摘要翻译： 公开了一种方法，其中将羧酸在第一溶剂和醇中的溶液进料到含有固体的模拟移动床反应器（SMBR）中以产生包含羧酸的酯溶液的第一物流 所述醇和包含所述第一溶剂的第二物流。 存在于SMBR中的固体促进酯化反应和第一溶剂与羧酸的分离。 该方法对于通过加入发酵液从含有溶解的2-酮-L-古洛糖酸（KLG）的水性发酵液中制备2-酮-L-古洛糖酸烷基酯（AKLG）的链烷醇溶液是特别有价值的， 将链烷醇加入到含有固体酸性酯化催化剂以产生包含ALKG的链烷醇溶液的流的模拟移动床反应器中。 ALKG的链烷醇溶液可以直接用于将ALKG转化为抗坏血酸（维生素C）。