Manufacture of propylene oxide
    1.
    发明授权
    Manufacture of propylene oxide 失效
    环氧丙烷的制造

    公开(公告)号:US4226780A

    公开(公告)日:1980-10-07

    申请号:US879723

    申请日:1978-02-21

    CPC分类号: C07D301/02 Y02P20/52

    摘要: Propylene oxide is prepared by elimination of water from propylene glycol which in turn is obtainable from propylene glycol acetate. The water is eliminated in the gas phase over a solid catalyst which consists of a weakly acidic carrier and an alkaline additive. The process offers a new method of manufacturing propylene oxide.

    摘要翻译: 通过从丙二醇中除去水制备环氧丙烷,丙二醇又可从丙二醇乙酸酯获得。 在由弱酸性载体和碱性添加剂组成的固体催化剂上,在气相中除去水。 该方法提供了一种制备环氧丙烷的新方法。

    Preparation of pyridines
    4.
    发明授权
    Preparation of pyridines 失效
    制备吡啶

    公开(公告)号:US4384120A

    公开(公告)日:1983-05-17

    申请号:US339998

    申请日:1982-01-18

    CPC分类号: C07D213/08 C07D213/14

    摘要: Pyridines are prepared by reacting a 2-alkoxy-2,3-dihydro-4H-pyran or a glutaraldehyde with ammonium nitrate in the presence of an aliphatic carboxylic acid and a catalytic amount of nitric acid.The pyridines which can be prepared by the process according to the invention are useful starting materials for the preparation of dyes, drugs and pest control agents and are useful solvents.

    摘要翻译: 吡啶通过2-烷氧基-2,3-二氢-4H-吡喃或戊二醛与硝酸铵在脂肪族羧酸和催化量的硝酸存在下反应来制备。 可以通过本发明的方法制备的吡啶是用于制备染料,药物和害虫控制剂的有用的起始原料,并且是有用的溶剂。

    Preparation of formaldehyde
    7.
    发明授权
    Preparation of formaldehyde 失效
    甲醛的制备

    公开(公告)号:US4354045A

    公开(公告)日:1982-10-12

    申请号:US221822

    申请日:1980-12-31

    摘要: Formaldehyde is prepared by dehydrogenation of methanol in the presence of a catalyst containing copper, zinc and tellurium, at from 300.degree. to 750.degree. C.The formaldehyde obtainable by the process of the invention is a disinfectant, tanning agent, reducing agent and valuable starting material for the preparation of synthetic resins, adhesives, plastics and auxiliaries in numerous sectors of industry.

    摘要翻译: 甲醛通过甲醇在含有铜,锌和碲的催化剂存在下在300℃至750℃下脱氢而制备。通过本发明方法获得的甲醛是消毒剂,鞣剂,还原剂和有价值的起始物 用于制造许多行业的合成树脂,粘合剂,塑料和助剂的材料。