Removal of riboflavin from fermentation suspensions
    1.
    发明授权
    Removal of riboflavin from fermentation suspensions 失效
    从发酵悬浮液中除去RIBOFLAVIN

    公开(公告)号:US5169759A

    公开(公告)日:1992-12-08

    申请号:US644609

    申请日:1991-01-23

    CPC分类号: C12P25/00

    摘要: Riboflavin is removed from fermentation suspensions by them being heated at from 50.degree. to 90.degree. C. for from 1 to 3 hours, than cooled to from 0.degree. to 30.degree. C. over a period of from 1 to 5 hours, and subsequently being centrifuged to give a sediment fraction and liquid fraction in such a way that the sediment fraction contains predominantly riboflavin crystals as solid, and the liquid fraction contains virtually no crystalline riboflavin, and, where appropriate, resuspending the sediment fraction in from 0.5 to 2 parts by volume of water per part by volume of sediment fraction and repeating procedure c.

    摘要翻译: 将核黄素从发酵悬浮液中除去,在50〜90℃下加热1〜3小时,冷却至0〜30℃,时间为1〜5小时,随后为 离心分离以得到沉淀物部分和液体部分,使得沉淀物部分主要含有核黄素晶体作为固体,并且液体部分几乎不含结晶核黄素,并且在适当情况下将沉降物组分重悬于0.5至2份中 每部分体积的沉淀物含量的水量和重复程序c。

    Method of purifying ferment-produced riboflavin
    3.
    发明授权
    Method of purifying ferment-produced riboflavin 失效
    净化发酵的RIBOFLAVIN的方法

    公开(公告)号:US5210023A

    公开(公告)日:1993-05-11

    申请号:US724056

    申请日:1991-07-01

    IPC分类号: C07D475/14 C12P17/18

    CPC分类号: C07D475/14

    摘要: A method of purifying ferment-produced riboflavin, wherein the impure riboflavin is suspended in water or dilute aqueous acid, and the suspension is heated at a temperature of from 75.degree. to 130.degree. C. for from 0.3 to 3 hours with stirring, during which time crystal transformation takes place, after which the mixture is cooled and the purified product is isolated in known manner.

    摘要翻译: 一种纯化发酵生产的核黄素的方法,其中不纯的核黄素悬浮在水中或稀释酸水溶液,悬浮液在75-130℃的温度下搅拌加热0.3-3小时,在此期间 发生时间晶体转变,然后将混合物冷却,以已知方式分离纯化产物。

    Stereoselective preparation of (-)
3a,6,6,9a-tetramethyl-perhydronaphtho[2,1-b]furan
    5.
    发明授权
    Stereoselective preparation of (-) 3a,6,6,9a-tetramethyl-perhydronaphtho[2,1-b]furan 失效
    ( - )3a,6,6,9a-四甲基 - 过氢萘并[2,1-b]呋喃的立体选择性制备

    公开(公告)号:US5616737A

    公开(公告)日:1997-04-01

    申请号:US674914

    申请日:1996-07-03

    CPC分类号: C07D307/92

    摘要: A process for the stereoselective preparation of (-)3a,6,6,9a-tetramethylperhydronaphtho[2,1-b]furan of the formula Ia ##STR1## by dehydration and cyclization of decahydro-2-hydroxy- 2,5,5,8-tetramethyl-1-naphthaleneethanol using solid acidic catalysts, wherein the decahydro-2-hydroxy- 2,5,5,8-tetramethyl-1-naphthaleneethanol is heated in the molten state at from 80.degree. to 200.degree. C. in the presence of from 10 to 100% by weight, based on the diol, of an active acidic aluminum oxide commercially supplied for (preparative) column chromatography.

    摘要翻译: 通过脱水和环化十氢-2-羟基-2的立体选择性制备式(Ia)的( - )3a,6,6,9a-四氢呋喃并[2,1-b]呋喃的方法, 5,5,8-四甲基-1-萘乙醇使用固体酸性催化剂,其中十氢-2-羟基-2,5,5,8-四甲基-1-萘乙醇在80〜200℃的熔融状态下加热 在10至100重量%的存在下,基于二醇,市售的(制备型)柱色谱法的活性酸性氧化铝。