Process for recovery of formic acid
    2.
    发明授权
    Process for recovery of formic acid 有权
    回收甲酸的方法

    公开(公告)号:US08530695B2

    公开(公告)日:2013-09-10

    申请号:US12989001

    申请日:2009-04-21

    IPC分类号: C07C51/00 C07D307/50

    摘要: The invention relates to a process for the recovery of concentrated high purity formic acid having a concentration of at least 50%, most preferably at least 95%, from biomass wherein an aqueous liquid mixture containing levulinic acid and possibly furfural is subjected to a liquid-liquid extraction step, followed by the recovery of furfural, formic acid and levulinic acid.

    摘要翻译: 本发明涉及从生物质中回收浓度为至少50%,最优选至少95%的浓缩高纯度甲酸的方法,其中含有乙酰丙酸和可能糠醛的含水液体混合物经受液 - 液体萃取步骤,然后回收糠醛,甲酸和乙酰丙酸。

    PROCESS FOR RECOVERY OF FORMIC ACID
    4.
    发明申请
    PROCESS FOR RECOVERY OF FORMIC ACID 有权
    恢复酸性酸的方法

    公开(公告)号:US20110137051A1

    公开(公告)日:2011-06-09

    申请号:US12989001

    申请日:2009-04-21

    IPC分类号: C07D307/50 C07C51/42

    摘要: The invention relates to a process for the recovery of concentrated high purity formic acid having a concentration of at least 50%, most preferably at least 95%, from biomass wherein an aqueous liquid mixture containing levulinic acid and possibly furfural is subjected to a liquid-liquid extraction step, followed by the recovery of furfural, formic acid and levulinic acid.

    摘要翻译: 本发明涉及从生物质中回收浓度为至少50%,最优选至少95%的浓缩高纯度甲酸的方法,其中含有乙酰丙酸和可能糠醛的含水液体混合物经受液 - 液体萃取步骤,然后回收糠醛,甲酸和乙酰丙酸。

    Process for the preparation of melamine
    5.
    发明授权
    Process for the preparation of melamine 失效
    三聚氰胺的制备方法

    公开(公告)号:US5731437A

    公开(公告)日:1998-03-24

    申请号:US571929

    申请日:1996-06-13

    IPC分类号: C07D251/62 C07D251/60

    CPC分类号: C07D251/60

    摘要: The invention relates to a process for the preparation of melamine from urea by feeding molten urea and hot ammonia gas into a reactor having a pressure within the range 50-150 bar and a temperature within the range 360.degree.-430.degree. C., whereby a reaction product is obtained which contains a liquid melamine melt and a gas mixture. This gas mixture is separated from the liquid melamine melt, and the liquid melamine melt thus obtained is directed to a vaporizer and is vaporized therein, and the melamine-containing gas obtained from the vaporizer is cooled in a quencher, in which case the melamine crystallizes in a very pure state, the purity being typically at minimum 99.9%.

    摘要翻译: PCT No.PCT / FI94 / 00307 Sec。 371日期:1996年6月13日 102(e)1996年6月13日PCT 1994年7月1日PCT公布。 第WO95 / 01345号公报 日期1995年1月12日本发明涉及一种通过将熔融尿素和热氨气加入到压力在50-150巴范围内,温度在360度-430度范围内的反应器中由尿素制备三聚氰胺的方法 得到含有液体三聚氰胺熔体和气体混合物的反应产物。 将该气体混合物与液体三聚氰胺熔体分离,将由此获得的液体三聚氰胺熔体导向蒸发器并蒸发,并将从蒸发器获得的含三聚氰胺的气体在猝灭剂中冷却,在这种情况下,三聚氰胺结晶 在非常纯净的状态下,纯度通常在99.9%以下。

    Method for recovering at least one metal from an acidified waste water
sludge
    7.
    发明授权
    Method for recovering at least one metal from an acidified waste water sludge 失效
    从酸化废水污泥中回收至少一种金属的方法

    公开(公告)号:US6010630A

    公开(公告)日:2000-01-04

    申请号:US601052

    申请日:1996-06-10

    IPC分类号: C02F1/26 C02F1/72 B01D11/02

    CPC分类号: C02F1/26 C02F1/722

    摘要: A method for recovering at least one metal from an acidified waste water sludge by liquid-liquid extraction by providing an acidified waste water sludge containing ions of at least one metal and organic material, treating the waste water with an oxidizer to convert the organic material into a form that does not have an unfavorable effect on a subsequent liquid-liquid extraction, and subjecting the treated, acidified waste water sludge to a liquid-liquid extraction thereby obtaining an organic phase loaded with ions of said at least one metal, and subsequently recovering ions of said at least one metal from said organic phase.

    摘要翻译: PCT No.PCT / FI94 / 00377 Sec。 371日期1996年6月10日 102(e)日期1996年6月10日PCT 1994年8月26日PCT公布。 公开号WO95 / 06005 日期1995年3月2日一种通过提供含有至少一种金属和有机材料的离子的酸化废水污泥,通过液 - 液萃取从酸化废水污泥中回收至少一种金属的方法,用氧化剂处理废水 将有机材料转化成对随后的液 - 液萃取不具有不利影响的形式,并且对经处理的酸化废水污泥进行液 - 液萃取,由此获得负载有所述至少一种离子的离子的有机相 金属,随后从所述有机相中回收所述至少一种金属的离子。