Nitric acid removal from oxidation products
    1.
    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。

    Process for preparing poly (glucaramides)
    3.
    发明授权
    Process for preparing poly (glucaramides) 失效
    制备聚(葡糖酰胺)的方法

    公开(公告)号:US5473035A

    公开(公告)日:1995-12-05

    申请号:US225696

    申请日:1994-04-11

    CPC分类号: C07C235/10 C08G69/10

    摘要: Novel monomers are described which contain a glucaric acid unit linked through an amide bond formed between a carbonyl carbon of a D-glucaric acid and one of the amino nitrogens of a primary diamine as well as their alkali metal salts. These N-aminohydrocarbylene (or N-aminoheterohydrocarbylene)-D-glucaramidates may then be polymerized to form polyhydroxypolyamides and in particular stereoregular polyhydroxypolyamides.

    摘要翻译: 描述了含有通过D-葡糖二酸的羰基碳与一级胺的一种氨基氮之间形成的酰胺键连接的葡糖二酸单元及其碱金属盐的新型单体。 然后可以将这些N-氨基亚烃基(或N-氨基杂烃基)-D-葡糖酰氨基聚合物聚合形成多羟基聚酰胺,特别是立体规则的聚羟基聚酰胺。

    High molecular weight stereoregular head-tail poly(glucaramides)
    6.
    发明授权
    High molecular weight stereoregular head-tail poly(glucaramides) 有权
    高分子立体定向头尾聚(glucaramides)

    公开(公告)号:US07314906B2

    公开(公告)日:2008-01-01

    申请号:US10734417

    申请日:2003-12-10

    IPC分类号: C08G69/04 C08G69/10

    摘要: 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 steroregular 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.

    摘要翻译: 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有限元素的预聚物。 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。

    Method of oxidization using nitric acid
    10.
    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。