METHOD FOR PRODUCING A FREE ACID FROM THE SALT THEREOF
    21.
    发明申请
    METHOD FOR PRODUCING A FREE ACID FROM THE SALT THEREOF 有权
    从其盐生产游离酸的方法

    公开(公告)号:US20110257429A1

    公开(公告)日:2011-10-20

    申请号:US13141456

    申请日:2010-02-01

    摘要: The invention relates to an improved method for releasing an organic acid, preferably a carbon, sulfone or phosphone acid, particularly an alpha or beta hydroxycarbon acid, from the ammonia salt thereof by releasing and removing ammoniac and simultaneous extraction of the released acid, having an amine as a suitable extraction means from the aqueous phase. This method corresponds to a reactive extraction. The reactive extraction of an organic acid from the aqueous ammonia salt solution thereof can be significantly improved by the use of a strip medium or carrier gas, such as nitrogen, air, water vapor or inert gases such as argon. The released ammoniac is removed from the aqueous solution by the continuous gas flow and can be resupplied into a production process. The free acid can be obtained by a method such as distillation, rectification, crystallization, reextraction, chromatography, adsorption or by a membrane method from the extraction means.

    摘要翻译: 本发明涉及通过释放和除去氨和同时提取释放的酸的有机酸,优选碳,砜或膦酸,特别是α或β羟基碳酸从其氨盐释放的改进方法,其具有 胺作为来自水相的合适的提取方法。 该方法对应于反应萃取。 通过使用带状介质或载气如氮气,空气,水蒸汽或惰性气体如氩气,可以显着地改善有机酸从其氨水溶液中的反应萃取。 通过连续气流将释放的氨水从水溶液中除去,并且可以再供给到生产过程中。 游离酸可以通过蒸馏,精馏,结晶,再萃取,色谱法,吸附法或从提取方法通过膜法等方法得到。

    METHOD FOR THE PRODUCTION OF FREE CARBOXYLIC ACIDS
    23.
    发明申请
    METHOD FOR THE PRODUCTION OF FREE CARBOXYLIC ACIDS 失效
    生产游离羧酸的方法

    公开(公告)号:US20110189742A1

    公开(公告)日:2011-08-04

    申请号:US13002519

    申请日:2009-04-29

    IPC分类号: C12P7/40

    摘要: A process for the preparation of free carboxylic acids including: A) preparation of carboxylic acid by a biological cell located in an aqueous medium with addition of an amine of formula (I) where R1, R2 and R3, independently of one another, are identical or different, branched or unbranched, optionally substituted hydrocarbon radicals or H; B) for cases where the added amine A) is water-soluble, addition of a water-insoluble amine of formula (I), where, in A) or B), a multiphase system is obtained and the corresponding ammonium carboxylate is formed from the water-insoluble amine and the carboxylic acid; C) removal of the water-insoluble phase; and D) heating of the water-insoluble phase with release of free carboxylic acid.

    摘要翻译: 一种制备游离羧酸的方法,包括:A)通过加入式(I)的胺的位于水性介质中的生物细胞制备羧酸,其中R1,R2和R3彼此独立地相同 或不同的支链或非支链的任选取代的烃基或H; B)对于添加的胺A)是水溶性的,加入式(I)的水不溶性胺,其中在A)或B)中获得多相体系,并且相应的羧酸铵由 水不溶性胺和羧酸; C)去除水不溶性相; 和D)释放游离羧酸时加热水不溶性相。

    Moldings based on silica
    27.
    发明授权
    Moldings based on silica 失效
    基于二氧化硅的成型品

    公开(公告)号:US06316383B1

    公开(公告)日:2001-11-13

    申请号:US09344488

    申请日:1999-06-25

    IPC分类号: B01J2108

    摘要: Moldings based on silica having a hollow cylindrical configuration with internal reinforcing stays or spokes leading from an inner wall of a hollow cylinder to the center of the molding or in the form of miniliths having passageway channels therethrough, are produced by homogenizing silica with methyl hydroxyethyl cellulose, wax and/or polyethylene glycol. Water and optionally aqueous alkaline ammonia solution are added, and the mixture is subjected to kneading and forming, extruding, optionally cutting the extrudate to the desired length by means of a cutting device, drying at a temperature from 20 to 150° C., and annealing for a period from 30 minutes to 10 hours at a temperature of 400 to 1200° C. The moldings can be used as catalyst supports for the production of unsaturated esters from olefins, organic acids and oxygen in the gas phase and and can be used in particular for the production of vinyl acetate monomer.

    摘要翻译: 基于二氧化硅的模制品具有中空圆柱形构造,其具有从中空圆柱体的内壁到模制中心或具有通道通道的微透镜形式的内部加强支柱或辐条,其通过用甲基羟乙基纤维素 ,蜡和/或聚乙二醇。 加入水和任选的碱性氨水溶液,将混合物进行捏合和成形,挤出,任选地通过切割装置将挤出物切割成所需长度,在20至150℃的温度下干燥,以及 在400〜1200℃的温度下退火30分钟〜10小时。成型体可以用作在气相中由烯烃,有机酸和氧气生产不饱和酯的催化剂载体,并且可以使用 特别是用于生产乙酸乙烯酯单体。