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    Process for the synthesis of 3-methyl-pyridine
    1.
    发明授权
    Process for the synthesis of 3-methyl-pyridine 有权

    公开(公告)号：US09701634B2

    公开(公告)日：2017-07-11

    申请号：US12822770

    申请日：2010-06-24

    申请人： Detlef Roederer ,  Daniel Zollinger ,  Jean-Yves De Riedmatten

    发明人： Detlef Roederer ,  Daniel Zollinger ,  Jean-Yves De Riedmatten

    IPC分类号： C07D213/10

    CPC分类号： C07D213/10

    摘要： The present invention discloses a process for the synthesis of 3-methyl-pyridine from formaldehyde, paracetaldehyde, ammonia and acetic acid, whereby said compounds are reacted and said process comprises the following parameters: a) a reaction temperature of 260-300° C.; b) a molar ratio of formaldehyde and paraldehyde (calculated as acetaldehyde) of 0.7-1.4 mol/mol: c) an ammonia concentration of 10-20 weight-% d) an acetic acid concentration of 4-20 weight-% e) a paraldehyde (calculated as acetaldehyde) concentration of 0.4-1.6 Mol/kg f) a retention time of 10-30 minutes in case of a continuous reaction and 10-90 minutes in case of a discontinuous reaction; and g) a reaction pressure of 30-130 bar.

    Process for the production of 3-picoline
    4.
    发明授权
    Process for the production of 3-picoline 失效
    3-甲基吡啶生产工艺

    公开(公告)号：US4370481A

    公开(公告)日：1983-01-25

    申请号：US357626

    申请日：1982-03-12

    申请人： Rolf Dinkel

    发明人： Rolf Dinkel

    IPC分类号： C07D213/10 ,  C07D213/12 ,  C07D213/08

    CPC分类号： C07D213/12 ,  C07D213/10

    摘要： Process for the production of 3-picoline. A first educt consisting of acetaldehyde and/or acetaldehydeacetals and/or crotonaldehyde is reacted with a second educt consisting of formaldehyde and/or formaldehydeacetals and/or hexamethylenetetramine. The reaction is conducted in a liquid, aqueous phase at a temperature of 180.degree. to 280.degree. C. in a closed vessel in the presence of an amide of a carboxylic acid.

    摘要翻译： 3-甲基吡啶生产工艺。 由乙醛和/或乙醛缩醛和/或巴豆醛组成的第一次喷射与由甲醛和/或甲醛缩醛和/或六亚甲基四胺组成的第二次喷射反应。 该反应在液体的水相中，在180℃至280℃的温度下，在密闭容器中，在羧酸的酰胺存在下进行。

    Process for the preparation of 3-picoline
    5.
    发明授权
    Process for the preparation of 3-picoline 失效
    3-甲基吡啶的制备方法

    公开(公告)号：US4337342A

    公开(公告)日：1982-06-29

    申请号：US263042

    申请日：1981-05-12

    申请人： Rolf Dinkel

    发明人： Rolf Dinkel

    IPC分类号： C07D213/08 ,  C07D213/09 ,  C07D213/10 ,  C07D213/12

    CPC分类号： C07D213/08 ,  C07D213/10 ,  C07D213/12

    摘要： A process for the preparation of 3-picoline wherein a mixture acetaldehyde and/or crotonaldehyde with formaldehyde is reacted in the presence of an ammonium salt at a temperature of 180.degree. to 280.degree. C. in a closed vessel. The mixture is in the liquid phase.

    摘要翻译： 一种制备3-甲基吡啶的方法，其中乙醛和/或巴豆醛与甲醛的混合物在铵盐存在下在180-280℃的温度下在密闭容器中反应。 混合物处于液相。

    Process for preparing pyridine bases
    6.
    发明授权
    Process for preparing pyridine bases 失效
    制备吡啶碱的方法

    公开(公告)号：US4263439A

    公开(公告)日：1981-04-21

    申请号：US48572

    申请日：1979-06-14

    申请人： Tetsuya Miyake ,  Kohji Noguchi ,  Kazuo Imamura

    发明人： Tetsuya Miyake ,  Kohji Noguchi ,  Kazuo Imamura

    IPC分类号： C07D213/10 ,  C07D213/16

    CPC分类号： C07D213/16 ,  C07D213/10

    摘要： A process for preparing simultaneously pyridine bases including 2-methylpyridine and 4-methylpyridine, occasionally, together with pyridine from acetaldehyde and ammonia by gas phase catalytic reaction, characterized in that the gas phase catalytic reaction is conducted in the presence of a catalyst prepared by (A) incorporating at least one compound containing at least one metal selected from the group consisting of tungsten, manganese, nickel, iron, cobalt, molybdenum, uranium, lead, silver, copper and tin into silica-alumina simultaneously with preparation of the silica-alumina, or (B) subjecting silica-alumina to ion exchange with ions of at least one metal selected from the group consisting of manganese, nickel, iron, cobalt, uranium, lead, silver, copper and tin to adsorb the ions on said silica-alumina. According to the process of the present invention, there can be obtained the desired pyridine bases in high yield, whereas formation of by-products including high boiling point pyridine derivatives is remarkably suppressed. The catalyst employed in the present process has a high resistance to the reaction atmosphere.

    摘要翻译： 同时通过气相催化反应同时制备包括2-甲基吡啶和4-甲基吡啶的吡啶碱与乙醛和氨的吡啶一起制备的方法，其特征在于气相催化反应是在催化剂存在下进行的， A）同时制备含有选自钨，锰，镍，铁，钴，钼，铀，铅，银，铜和锡中的至少一种金属的至少一种化合物，同时制备二氧化硅 - 氧化铝，或（B）使二氧化硅 - 氧化铝与选自锰，镍，铁，钴，铀，铅，银，铜和锡中的至少一种金属的离子进行离子交换，以将离子吸附在所述二氧化硅 氧化铝 根据本发明的方法，可以高产率获得所需的吡啶碱，而显着抑制了包括高沸点吡啶衍生物在内的副产物的形成。 本方法中使用的催化剂对反应气氛具有高抗性。

    Process for producing alkylpyridines
    8.
    发明授权
    Process for producing alkylpyridines 失效
    制备烷基吡啶的方法

    公开(公告)号：US3932421A

    公开(公告)日：1976-01-13

    申请号：US159548

    申请日：1971-07-02

    申请人： Yoshizo Minato ,  Shinichi Yasuda

    发明人： Yoshizo Minato ,  Shinichi Yasuda

    IPC分类号： B01J27/185 ,  C07D213/10

    CPC分类号： C07D213/10 ,  B01J27/1853

    摘要： Alkylpyridines such as 2-picoline and 4-picoline are prepared by contacting acetaldehyde and ammonia in a gaseous phase with a phosphate of two metals such as cobalt magnesium phosphate, cobalt aluminum phosphate or lead aluminum phosphate, impregnated with an aqueous solution of phosphoric acid or ammonium phosphate, as a catalyst, at a temperature of 350.degree. to 500.degree.C and a space velocity of 200 to 2,000 Hr.sup.-.sup.1. Silica-alumina and a promoter can be added to the catalyst. The impregnated catalyst has a higher catalytic activity and holds the initial high activity even after a considerable number of regeneration.

    摘要翻译： 通过将乙醛和氨与气相中的两种金属如磷酸钴钾，磷酸钴铝或磷酸铅或磷酸盐的磷酸盐接触，制备烷基吡啶如2-甲基吡啶和4-甲基吡啶，浸渍磷酸水溶液或 磷酸铵作为催化剂，在350-500℃的温度和200-2,000Hr -1的空间速度下进行。 可将二氧化硅 - 氧化铝和助催化剂加入到催化剂中。 浸渍的催化剂具有更高的催化活性，并且即使在相当多的再生之后也保持初始的高活性。