Process for producing tartaric acid from a raw material containing potassium hydrogentartrate
    2.
    发明授权
    Process for producing tartaric acid from a raw material containing potassium hydrogentartrate 有权
    从含有酒石酸钾的原料中生产酒石酸的方法

    公开(公告)号:US06534678B1

    公开(公告)日:2003-03-18

    申请号:US09303975

    申请日:1999-05-03

    CPC classification number: C07C51/412 C07C51/02 C07C51/487 C07C59/255

    Abstract: Process for producing tartaric acid from a raw material whose dry matter comprises at least 5 wt% potassium hydrogentartrate wherein the raw material containing potassium hydrogen tartrate (KHT) is mixed with aqueous potassium hydroxide solution in a first reaction stage, where KHT is virtually completely reacted to form dipotassium tartrate (DKT), the aqueous solution containing DKT is then mixed with added acid in a precipitation stage at a pH value of 2.0 to 5.0, to produce a suspension containing crystallized KHT; crystallized KHT is then separated from the suspension, washed with water, and there is produced a solution at least 80 wt-% saturated with KHT and then the potassium is removed, to obtain an aqueous tartaric acid product solution, from which water is then at least partly removed.

    Abstract translation: 从干物质包含至少5重量%的氢化酒石酸钾的原料生产酒石酸的方法,其中在第一反应阶段将含有酒石酸氢钾的原料(KHT)与氢氧化钾水溶液混合,其中KHT实际上完全反应 形成酒石酸二钾(DKT),然后在pH值为2.0〜5.0的沉淀阶段将含有DKT的水溶液与添加的酸混合,得到含有结晶KHT的悬浮液; 然后将结晶的KHT从悬浮液中分离,用​​水洗涤,并且产生用KHT饱和至少80wt%的溶液,然后除去钾,得到酒石酸水溶液,然后将水 最少部分删除。

    Process for the continuous recovery of free tartaric acid from raw materials containing potassium hydrogentartrate
    5.
    发明授权
    Process for the continuous recovery of free tartaric acid from raw materials containing potassium hydrogentartrate 失效
    从含有酒石酸钾的原料中连续回收游离酒石酸的方法

    公开(公告)号:US07311837B2

    公开(公告)日:2007-12-25

    申请号:US10789704

    申请日:2004-02-26

    CPC classification number: C07C51/02 C07C51/42 C07C59/255

    Abstract: In a process for the continuous recovery of free tartaric acid from raw materials containing potassium hydrogentartrate, the same are mixed with water and the potassium hydrogentartrate is dissolved. The process is improved in that the suspension is decanted, the clarified liquid is refiltered, the filtrate is cooled to crystallization temperature under a vacuum, the potassium hydrogentartrate crystals formed are dissolved, the solution is subjected to a cation exchange, and the tartaric acid solution obtained is evaporated.

    Abstract translation: 在含有氢化酒石酸钾的原料中连续回收游离酒石酸的方法中,将其与水混合,并溶解氢化酒石酸钾。 改进方法是将悬浮液倾析,将澄清的液体重新过滤,将滤液在真空下冷却至结晶温度,形成的氢化酒石酸钾晶体溶解,将溶液进行阳离子交换,并将酒石酸溶液 获得的蒸发。

Patent Agency Ranking