Method of oxidization using nitric acid
    7.
    发明申请
    Method of oxidization using nitric acid 有权
    使用硝酸的氧化方法

    公开(公告)号:US20080033205A1

    公开(公告)日:2008-02-07

    申请号:US11890760

    申请日:2007-08-06

    IPC分类号: C07C51/16

    摘要: A controlled nitric acid process employing oxygen and nitric acid as co-oxidants is used to oxidize organic compounds subject to nitric acid oxidation, to their corresponding carboxylic acids. Oxidation of some carbohydrates by this process can produce one or more of their corresponding acid forms. The process is carried out at moderate temperatures, typically in the range of 20° C. to 45° C. in a closed reactor, with oxygen gas being introduced into the reaction chamber as needed in order to sustain the reaction. Computer controlled reactors allow for careful and reproducible control of reaction parameters. Nitric acid can be recovered by a distillation/evaporation process, or by diffusion dialysis, the aqueous solution made basic with inorganic hydroxide, and the residual inorganic nitrate removed using a filtration (nanofiltration) device. The method eliminates issues of thermal control of the oxidation, release of nitrogen into the atmosphere, and post-reaction difficulties in the removal of nitric acid and inorganic nitrates.

    摘要翻译: 使用使用氧和硝酸作为辅助氧化剂的受控硝酸方法将经受硝酸氧化的有机化合物氧化成其相应的羧酸。 通过该方法氧化一些碳水化合物可以产生一种或多种相应的酸形式。 该方法在中等温度下进行,通常在封闭反应器中在20℃至45℃的范围内,根据需要将氧气引入反应室,以维持反应。 计算机控制的反应器允许仔细和可重复地控制反应参数。 硝酸可以通过蒸馏/蒸发过程或通过扩散透析回收,水溶液用无机氢氧化物制成碱性,并且使用过滤(纳滤)装置除去残留的无机硝酸盐。 该方法消除了氧化的热控制,氮气释放到大气中的问题,以及去除硝酸和无机硝酸盐的后反应困难。

    Method of Oxidization Using Nitric Acid
    8.
    发明申请
    Method of Oxidization Using Nitric Acid 审中-公开
    使用硝酸的氧化方法

    公开(公告)号:US20100191002A1

    公开(公告)日:2010-07-29

    申请号:US12753721

    申请日:2010-04-02

    IPC分类号: C07D309/30 C07C55/02

    摘要: A controlled nitric acid process employing oxygen and nitric acid as co-oxidants is used to oxidize organic compounds subject to nitric acid oxidation, to their corresponding carboxylic acids. Oxidation of some carbohydrates by this process can produce one or more of their corresponding acid forms. The process is carried out at moderate temperatures, typically in the range of 20° C. to 45° C. in a closed reactor, with oxygen gas being introduced into the reaction chamber as needed in order to sustain the reaction. Computer controlled reactors allow for careful and reproducible control of reaction parameters. Nitric acid can be recovered by a distillation/evaporation process, or by diffusion dialysis, the aqueous solution made basic with inorganic hydroxide, and the residual inorganic nitrate removed using a filtration (nanofiltration) device. The method eliminates issues of thermal control of the oxidation, release of nitrogen into the atmosphere, and post-reaction difficulties in the removal of nitric acid and inorganic nitrates.

    摘要翻译: 使用使用氧和硝酸作为辅助氧化剂的受控硝酸方法将经受硝酸氧化的有机化合物氧化成其相应的羧酸。 通过该方法氧化一些碳水化合物可以产生一种或多种相应的酸形式。 该方法在中等温度下进行,通常在封闭反应器中在20℃至45℃的范围内,根据需要将氧气引入反应室,以维持反应。 计算机控制的反应器允许仔细和可重复地控制反应参数。 硝酸可以通过蒸馏/蒸发过程或通过扩散透析回收,水溶液用无机氢氧化物制成碱性,并且使用过滤(纳滤)装置除去残留的无机硝酸盐。 该方法消除了氧化的热控制,氮气释放到大气中的问题,以及去除硝酸和无机硝酸盐的后反应困难。

    Method of oxidation using nitric acid
    9.
    发明授权
    Method of oxidation using nitric acid 有权
    使用硝酸的氧化方法

    公开(公告)号:US07692041B2

    公开(公告)日:2010-04-06

    申请号:US11890760

    申请日:2007-08-06

    摘要: A controlled nitric acid process employing oxygen and nitric acid as co-oxidants is used to oxidize organic compounds subject to nitric acid oxidation, to their corresponding carboxylic acids. Oxidation of some carbohydrates by this process can produce one or more of their corresponding acid forms. The process is carried out at moderate temperatures, typically in the range of 20° C. to 45° C. in a closed reactor, with oxygen gas being introduced into the reaction chamber as needed in order to sustain the reaction. Computer controlled reactors allow for careful and reproducible control of reaction parameters. Nitric acid can be recovered by a distillation/evaporation process, or by diffusion dialysis, the aqueous solution made basic with inorganic hydroxide, and the residual inorganic nitrate removed using a filtration (nanofiltration) device. The method eliminates issues of thermal control of the oxidation, release of nitrogen into the atmosphere, and post-reaction difficulties in the removal of nitric acid and inorganic nitrates.

    摘要翻译: 使用使用氧和硝酸作为辅助氧化剂的受控硝酸方法将经受硝酸氧化的有机化合物氧化成其相应的羧酸。 通过该方法氧化一些碳水化合物可以产生一种或多种相应的酸形式。 该方法在中等温度下进行,通常在封闭反应器中在20℃至45℃的范围内,根据需要将氧气引入反应室,以维持反应。 计算机控制的反应器允许仔细和可重复地控制反应参数。 硝酸可以通过蒸馏/蒸发过程或通过扩散透析回收,水溶液用无机氢氧化物制成碱性,并且使用过滤(纳滤)装置除去残留的无机硝酸盐。 该方法消除了氧化的热控制,氮气释放到大气中的问题,以及去除硝酸和无机硝酸盐的后反应困难。

    Nitric acid removal from oxidation products
    10.
    发明授权
    Nitric acid removal from oxidation products 有权
    从氧化产物中除去硝酸

    公开(公告)号:US6049004A

    公开(公告)日:2000-04-11

    申请号:US209285

    申请日:1998-12-11

    摘要: A method for synthesizing and isolating an oxidation product is disclosed wherein nitric acid is reacted with an oxidizable reactant and the desired oxidized product is extracted using an organic solvent such as a dialkyl ether. The method permits the direct crystallization of aldaric acids such as glucaric acid and mannaric acid and eliminates the necessity of employing complicated, time consuming and wasteful neutralization/acidification steps.

    摘要翻译: 公开了一种用于合成和分离氧化产物的方法,其中将硝酸与可氧化的反应物反应,并使用有机溶剂如二烷基醚萃取所需的氧化产物。 该方法允许醛糖酸如葡糖二酸和甘露糖酸的直接结晶,并且消除了使用复杂,耗时和浪费的中和/酸化步骤的必要性。