Synthesis of tertiary amine oxides
    18.
    发明授权
    Synthesis of tertiary amine oxides 失效
    叔胺氧化物的合成

    公开(公告)号:US5866718A

    公开(公告)日:1999-02-02

    申请号:US820871

    申请日:1997-03-20

    IPC分类号: C07C291/04 C07C213/00

    CPC分类号: C07C291/04

    摘要: A process is provided for the manufacture of free-flowing solid tertiary amine oxides having N-nitrosodimethylamine levels of less than about 250 ppb. The process comprises heating a mixture of a tertiary amine, a polar hydroxy alkyl solvent, an organic acid, and aqueous hydrogen peroxide, followed by removal of the solvent and water, preferably by azeotropic removal. The resultant tertiary amine oxides have good color without bleaching and are useful without further purification.

    摘要翻译: 提供了制备具有小于约250ppb的N-亚硝基二甲基胺水平的自由流动的固体叔胺氧化物的方法。 该方法包括加热叔胺,极性羟基烷基溶剂,有机酸和过氧化氢水溶液的混合物,然后除去溶剂和水,优选通过共沸除去。 所得的叔胺氧化物在没有漂白的情况下具有良好的颜色,并且不经进一步纯化即可使用。

    Process for the purification of aqueous solutions of tertiary
amine-oxides
    19.
    发明授权
    Process for the purification of aqueous solutions of tertiary amine-oxides 失效
    纯化叔胺氧化物水溶液的方法

    公开(公告)号:US5602247A

    公开(公告)日:1997-02-11

    申请号:US454315

    申请日:1995-08-14

    摘要: The invention is concerned with a process for the production of cellulose molded bodies. This process has the following steps:(A) dissolving cellulose in an aqueous solution of a tertiary amine-oxide to produce a moldable cellulose solution,(B) molding said cellulose solution and conducting said molded cellulose solution into an aqueous precipitation bath, wherein the cellulose is precipitated, thus producing a molded body and a spent precipitation bath, and(C) purifying said spent precipitation bath by contacting said precipitation bath with an ion exchanger, thus producing a purified aqueous amine-oxide solution which, optionally after concentration, is re-used again in step (A) as a cellulose solvent. In this process, the ion exchanger comprises a cellulose carrier which has attached groups which are capable of exchanging ions.

    摘要翻译: PCT No.PCT / AT95 / 00022 Sec。 371日期1995年8月14日 102(e)日期1995年8月14日PCT 1995年2月1日提交PCT公布。 WO95 / 23885 PCT公开 日期1995年9月8日本发明涉及生产纤维素成型体的方法。 该方法具有以下步骤:(A)将纤维素溶解在叔胺氧化物的水溶液中以制备可成型纤维素溶液,(B)将所述纤维素溶液模塑并将所述模制的纤维素溶液导入含水沉淀浴中,其中 纤维素被沉淀,从而生成成型体和废沉淀浴,(C)通过使所述沉淀浴与离子交换剂接触来纯化所述废沉淀浴,从而产生纯化的氧化胺水溶液,其任选地在浓缩后是 在步骤(A)中再次使用纤维素溶剂。 在该方法中,离子交换剂包括具有能够交换离子的连接基团的纤维素载体。

    Process for preparing mono-long chain amine oxide surfactants
    20.
    发明授权
    Process for preparing mono-long chain amine oxide surfactants 失效
    制备单长链氧化胺表面活性剂的方法

    公开(公告)号:US5583258A

    公开(公告)日:1996-12-10

    申请号:US388780

    申请日:1995-02-15

    申请人: Gene P. Hawkins

    发明人: Gene P. Hawkins

    IPC分类号: C07C291/04 C11D1/75

    CPC分类号: C07C291/04 C11D1/75

    摘要: Mono-long chain amine oxide surfactants can be prepared containing active levels of greater than about 30%, by weight of amine, and with low nitrite and nitrosamine levels when oxidized in the presence of bicarbonate material present at levels less than about 2.5%, by weight of amine, and without the presence of phase-modifying solvents.

    摘要翻译: 可以制备单长链氧化胺表面活性剂,其含有大于约30重量%的胺的活性水平,并且当以低于约2.5%的水平存在的碳酸氢盐存在下氧化时,亚硝酸盐和亚硝胺含量低 胺的重量,并且不存在相变化溶剂。