METHOD FOR THE PREPARATION OF ORGANIC ACIDS VIA OXIDIZATION USING NITRIC ACID

    公开(公告)号:WO2008021054A3

    公开(公告)日:2008-02-21

    申请号:PCT/US2007/017493

    申请日:2007-08-06

    Abstract: 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.

    METHOD OF PREPARING HIGH MOLECULAR WEIGHT RANDOM POLYHYDROXYPOLYAMIDES
    4.
    发明申请
    METHOD OF PREPARING HIGH MOLECULAR WEIGHT RANDOM POLYHYDROXYPOLYAMIDES 审中-公开
    制备高分子量随机聚硅氧烷的方法

    公开(公告)号:WO2004052959A1

    公开(公告)日:2004-06-24

    申请号:PCT/US2003/039734

    申请日:2003-12-10

    CPC classification number: C08G69/28 C08G69/26 Y10S525/926

    Abstract: High molecular weight random polyhydroxypolyamides (PHPAs) are produced by creating prepolymers which are further polymerized. Random prepolymers are formed from a stoichiometrically molar balanced (1:1) starting material. The starting material is a 1:1 stoichiometrically balanced esterified aldaric acid: alkylene or alkylene derived diammonium salt. Alternatively, the starting material is an esterified stoichiometrically balanced diacid: diamine salt and a N '-ammoniumalkyl (or alkyl derived)-D-aldaramic acid terminal carboxylate zwitterionic salt mixture. The starting materials are polymerized in a basic alcohol using a second amine. The polymerized material, or the random prepolymers, are isolated and then further polymerized in a solvent, typically a mixed solvent of an alcohol and non-alcohol, to obtain the high molecular weight PHPAs.

    Abstract translation: 通过产生进一步聚合的预聚物制备高分子量无规多羟基聚酰胺(PHPAs)。 随机预聚物由化学计量摩尔平衡(1:1)的原料形成。 原料是1:1化学计量平衡的酯化醛酸:亚烷基或亚烷基衍生的二铵盐。 或者,原料是酯化的化学计量平衡的二酸:二胺盐和N'-烷基(或烷基衍生的)-D-阿拉斯加酸末端羧酸酯两性离子盐混合物。 使用第二种胺将原料在碱性醇中聚合。 分离聚合的材料或无规预聚物,然后在溶剂(通常为醇和非醇的混合溶剂)中进一步聚合,得到高分子量的PTA。

    METHOD OF OXIDATION USING NITRIC ACID
    6.
    发明申请
    METHOD OF OXIDATION USING NITRIC ACID 审中-公开
    使用硝酸的氧化方法

    公开(公告)号:WO2008021054A2

    公开(公告)日:2008-02-21

    申请号:PCT/US2007017493

    申请日:2007-08-06

    CPC classification number: C07C51/27 C07C51/00 C07C59/285

    Abstract: 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.

    Abstract translation: 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)装置除去残余的无机硝酸盐。 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。

    HIGH MOLECULAR WEIGHT STEREOREGULAR HEAD-TAIL POLY(GLUCARAMIDES)
    7.
    发明申请
    HIGH MOLECULAR WEIGHT STEREOREGULAR HEAD-TAIL POLY(GLUCARAMIDES) 审中-公开
    高分子量重量立体头尾胶(GLUCARAMIDES)

    公开(公告)号:WO2004052958A1

    公开(公告)日:2004-06-24

    申请号:PCT/US2003/039733

    申请日:2003-12-10

    CPC classification number: C08G69/04 C08G69/10 Y10S525/928

    Abstract: A method of producing high molecular weight stereoregular head, tail-poly(alkylene D-glucaramides) is described. Amidoamino acids are esterified in cold alcohol and then polymerized in a protic solvent to form stereoregular prepolymers. The prepolymers are then further polymerized by dissolving them in a solvent to form larger, purer postpolymers. Compositions of matter prepared using the subject method are also described.

    Abstract translation: 描述了一种生产高分子量立构规整头,尾 - 聚(亚烷基D-葡糖酰胺)的方法。 氨基氨基酸在冷乙醇中酯化,然后在质子溶剂中聚合以形成立体规则预聚物。 然后通过将预聚物溶解在溶剂中以形成更大,更纯的后聚合物进一步聚合。 还描述了使用本发明方法制备的物质的组成。

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