Method of producing alkanesulfonic acid
    3.
    发明授权
    Method of producing alkanesulfonic acid 有权
    烷基磺酸的生产方法

    公开(公告)号:US06531629B1

    公开(公告)日:2003-03-11

    申请号:US09831362

    申请日:2001-05-15

    IPC分类号: C07C30316

    CPC分类号: C07C303/16 C07C309/04

    摘要: The invention relates to a process for the prepartaion of alkanesulfonic acids, comprising the following steps: (a) oxidation of alkylmercaptans and/or dialkyl disulfides and/or dialkyl polysulfides having from three to nine sulfur atoms with nitric acid to form alkanesulfonic acids, water, nitrogen oxides and other byproducts, (b) regeneration of the nitrogen oxides obtained from step (a) with oxygen to give nitric acid and recycling of the nitric acid to step (a), where steps (a) and (b) are carried out in reaction chambers separate from one another.

    摘要翻译: 本发明涉及一种预聚烷基磺酸的方法,包括以下步骤:(a)用硝酸将具有3-9个硫原子的烷基硫醇和/或二烷基二硫化物和/或二烷基多硫化物氧化形成烷烃磺酸,水 ,氮氧化物和其它副产物,(b)用氧气再生由步骤(a)获得的氮氧化物,得到硝酸并将硝酸再循环至步骤(a),其中步骤(a)和(b) 在反应室中彼此分离。

    Preparation of methane sulfonic acid
    7.
    发明授权
    Preparation of methane sulfonic acid 失效
    甲磺酸的制备

    公开(公告)号:US06207025B1

    公开(公告)日:2001-03-27

    申请号:US09269759

    申请日:1999-04-08

    IPC分类号: C07C30300

    CPC分类号: C07C303/14 C07C309/04

    摘要: A process for preparing methanesulfonic acid by irradiating a mixture comprising acetic acid, sulfur dioxide and oxygen with light, wherein the reaction mixture is irradiated with an average cumulative irradiance in the range from 240 to 320 mm of from 0.05 to 50 mmol quanta/cm2h at the light entry area.

    摘要翻译: 通过用光照射包含乙酸,二氧化硫和氧气的混合物来制备甲磺酸的方法,其中反应混合物在240至320mm范围内的平均累积辐照度为0.05至50mmol量子/ cm 2h, 光入口区域。

    Method for producing lactams using oligophosphate catalysts
    10.
    发明授权
    Method for producing lactams using oligophosphate catalysts 失效
    使用寡磷酸酯催化剂生产内酰胺的方法

    公开(公告)号:US06407230B1

    公开(公告)日:2002-06-18

    申请号:US09646153

    申请日:2000-09-14

    IPC分类号: C07D20108

    摘要: A process for preparing lactams by hydrolytic cyclization of aminonitriles in the gas phase in the presence of a metal phosphate catalyst comprises using a catalyst comprising one or more oligophosphates of the general formula (I) M (POa)b  (I) where M is a metal of group 3 or 4 of the periodic table, including the lanthanides, a is >2.5 and

    摘要翻译: 在金属磷酸盐催化剂的存在下,通过在气相中水解环化氨基腈制备内酰胺的方法包括使用包含一种或多种通式(I)的低聚磷酸酯的催化剂,其中M是第三或第四族的金属 周期表,包括镧系元素,a为> 2.5和<4.0,b为使得电中性得到确保,或者一种或多种通式(I)的低磷酸盐与一种或多种其它金属的另外的盐的混合物 元素周期表的第3或第4族,包括镧系元素,与无机酸。