Dividing wall column for fractionation of a multicomponent mixture
    2.
    发明申请
    Dividing wall column for fractionation of a multicomponent mixture 有权
    分隔壁柱用于多组分混合物的分馏

    公开(公告)号:US20110139604A1

    公开(公告)日:2011-06-16

    申请号:US09782305

    申请日:2001-02-14

    IPC分类号: B01D3/16

    摘要: A dividing wall column comprises the following segments:a) an upper column region (1),b) an enrichment section (2) of the feed section,c) a stripping section (4) of the feed section,d) an upper part (3) of the offtake section,e) a lower part (5) of the offtake section,f) an intermediate region (9) of the feed section,g) an intermediate region (10) of the offtake section andh) a lower column region (6).For the purposes of the present invention, it is essential that the dividing wall (7) is located vertically between the segments b) (2) and d) (3) and between the segments c) (4) and e) (5), the segments b) (2), d) (3), c) (4) and e) (5) have separation-active internals and the cross-sectional area Ab of the segment b) (2) is at least 10% smaller than the cross-sectional area Ad of segment d) (3), and the cross-sectional area Ac of the segment c) (4) is at least 10% greater than the cross-sectional area Ae of segment e) (5).

    摘要翻译: 分隔壁柱包括以下部分:a)上部柱区域(1),b)进料部分的富集部分(2),c)进料部分的汽提部分(4),d)上部部分 (3),e)出料部分的下部(5),f)进料部分的中间区域(9),g)出料部分的中间区域(10)和h)a 下列区域(6)。 为了本发明的目的,重要的是分隔壁(7)垂直位于段b)(2)和d)(3)之间以及段c)(4)和e)(5)之间。 ,分段b)(2),d)(3),c)(4)和e)(5)具有分离活性的内部,并且段b)(2)的横截面积Ab至少为10 (3)段的横截面面积Ad的百分比小于段c)(4)的横截面积Ac比段e)的横截面积Ae至少大10%( 5)。

    Method for the production of L-ascorbic acid by lactonization of 2-keto-L-gulonic acid or s2-keto-L-gulonate esters
    5.
    发明授权
    Method for the production of L-ascorbic acid by lactonization of 2-keto-L-gulonic acid or s2-keto-L-gulonate esters 失效
    通过2-酮-L-古洛糖酸或s2-酮-L-古洛糖酸酯的内酯化生产L-抗坏血酸的方法

    公开(公告)号:US06617463B2

    公开(公告)日:2003-09-09

    申请号:US10275565

    申请日:2002-11-07

    IPC分类号: C07D30512

    CPC分类号: C07D307/62

    摘要: The invention relates to a process for the preparation of L-ascorbic acid, in which free 2-keto-L-gulonic acid or C3-C10-alkyl 2-keto-L-gulonate is lactonized under acidic conditions in the presence of a water-miscible solvent and where this solvent in situ forms a solvent in which the ascorbic acid formed is poorly soluble.

    摘要翻译: 本发明涉及一种制备L-抗坏血酸的方法,其中游离2-酮-L-古洛糖酸或2-酮-L-古洛糖酸C3-C10烷基酯在酸性条件下在水存在下进行内酯化 这种溶剂原位形成其中形成的抗坏血酸难溶的溶剂。

    Dividing wall column for fractionation of a multicomponent mixture
    8.
    发明授权
    Dividing wall column for fractionation of a multicomponent mixture 有权
    分隔壁柱用于多组分混合物的分馏

    公开(公告)号:US08092655B2

    公开(公告)日:2012-01-10

    申请号:US09782305

    申请日:2001-02-14

    IPC分类号: B01D1/14 B01D3/42 C07C67/54

    摘要: A dividing wall column is described which includes the following segments:a) an upper column region (1),b) an enrichment section (2) of the feed section,c) a stripping section (4) of the feed section,d) an upper part (3) of the offtake section,e) a lower part (5) of the offtake section,f) an intermediate region (9) of the feed section,g) an intermediate region (10) of the offtake section andh) a lower column region (6).The dividing wall column has a dividing wall (7) is located vertically between the segments b) (2) and d) (3) and between the segments c) (4) and e) (5). The segments b) (2), d) (3), c) (4) and e) (5) have separation-active internals, Segment b (2) has a cross-sectional area Ab which is at least 10% smaller than the cross-sectional area Ad of segment d) (3), and segment c) has a cross-sectional area Ac which is at least 10% greater than the cross-sectional area Ae of segment e) (5).

    摘要翻译: 描述了分隔壁柱,其包括以下部分:a)上部柱区域(1),b)进料部分的富集部分(2),c)进料部分的汽提部分(4),d) 所述出料部分的上部(3),e)所述出料部分的下部(5),f)所述进料部分的中间区域(9),g)所述出料部分的中间区域(10)和 h)较低的列区域(6)。 分隔壁柱具有位于段b)(2)和d)(3)之间以及段c)(4)和e)(5)之间的分隔壁(7)。 段b)(2),d)(3),c)(4)和e)(5)具有分离活性内部,段b(2)的横截面积Ab至少减小10% 比段d)(3)的截面面积Ad大,截面积Ac的截面面积Ac比段e)(5)的横截面面积Ae至少大10%。

    Preparation of veratryl cyanide
    9.
    发明授权
    Preparation of veratryl cyanide 失效
    氰化镨的制备

    公开(公告)号:US4661610A

    公开(公告)日:1987-04-28

    申请号:US887940

    申请日:1986-07-22

    IPC分类号: C07C255/53 C07C120/04

    CPC分类号: C07C255/00

    摘要: Veratryl cyanide is prepared by chloromethylating veratrol in solution in toluene and then reacting the resulting veratryl chloride with from 1 to 5 moles of an alkali metal cyanide, by a process in which the toluene from the chloromethylation is not removed for the reaction with cyanide, and from 3 to 25% by weight, based on veratryl chloride, of water, from 5 to 50% by weight, based on toluene, of a ketone of 3 to 6 carbon atoms and from 0.1 to 10% by weight, based on veratryl chloride, of a phase transfer catalyst are added before the reaction with cyanide.

    摘要翻译: 通过在甲苯溶液中氯甲基化藜芦醇,然后使得到的藜芦酰与1至5摩尔碱金属氰化物反应,其中氯甲基化的甲苯未被除去以与氰化物反应, 3至25重量%,基于藜芦醚,水,5至50重量%,基于甲苯,3至6个碳原子的酮和0.1至10重量%,基于藜芦 的相转移催化剂在与氰化物反应之前加入。

    Preparation of 2-keto-L-gulonic esters
    10.
    发明授权
    Preparation of 2-keto-L-gulonic esters 失效
    2-酮-L-古洛糖酯的制备

    公开(公告)号:US06573400B1

    公开(公告)日:2003-06-03

    申请号:US09636825

    申请日:2000-08-14

    IPC分类号: C07C6966

    CPC分类号: C07H7/027

    摘要: C1-C10-alkyl 2-keto-L-gulonates are prepared by esterifying 2-keto-L-gulonic acid or diacetone-2-keto-L-gulonic acid with a C1-C10-alcohol in the presence of an acidic catalyst by a process in which the esterification is carried out in a liquid film on a hot surface with simultaneous removal of water.

    摘要翻译: 通过在酸性催化剂存在下用C1-C10醇将2-酮-L-古洛糖酸或双丙酮-2-酮-L-古洛糖酸酯化,制备2-酮-L-古洛糖化物的C 1 -C 10烷基酯 其中在热表面上的液膜中进行酯化同时除去水的方法。