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    Purification of pentaerythritol trinitrate by crystallization
    101.
    发明授权
    Purification of pentaerythritol trinitrate by crystallization 失效
    通过结晶纯化三硼酸三戊酯

    公开(公告)号：US3806578A

    公开(公告)日：1974-04-23

    申请号：US4010060

    申请日：1960-06-30

    Applicant: DU PONT

    Inventor： BRENNECKE H

    IPC: C07C201/02 ,  C07C77/02

    CPC classification number: C07C201/02 ,  C07C203/04

    Abstract: 1. A process for the purification of pentaerythritol trinitrate which comprises adding water to a solution of pentaerythritol trinitrate in methylene chloride, cooling, with agitation, the mixture thus formed to a temperature between about -10* and about +10*C., and separating the purified pentaerythritol trinitrate in the form of hydrate crystals from the solution, the weight ratio of said methylene chloride being between about 0.5 and about 2 parts for each part of pentaerythritol trinitrate and the weight ratio of said water being at least 1 part for each 50 parts of pentaerythritol trinitrate.

    Abstract translation: 1.一种用于纯化季戊四醇三硝酸酯的方法，其包括向季戊四醇三硝酸酯的二氯甲烷溶液中加入水，在搅拌下冷却，将混合物形成至约-10℃至约+10℃的温度， 从溶液中分离纯化的季戊四醇三水合物形式的季戊四醇三水合物，对于每份季戊四醇三硝酸酯，所述二氯甲烷的重量比为约0.5至约2份，所述水的重量比对于每种季铵盐至少为1份 50份季戊四醇三硝酸酯。

    Manufacture of an alkyl nitrate
    107.
    发明授权
    Manufacture of an alkyl nitrate 失效
    制备硝酸烷基酯

    公开(公告)号：US2647914A

    公开(公告)日：1953-08-04

    申请号：US23127251

    申请日：1951-06-12

    Applicant: ICI LTD

    Inventor： ALLAN WILLIAM G ,  TOBIN THOMAS J

    IPC: C07C201/02

    CPC classification number: C07C203/04 ,  C07C201/02

    Abstract: A process for the continuous production of isopropyl nitrate by the continuous distillation of a mixture of easily volatile products from a boiling reaction mixture formed from nitric acid and isopropyl alcohol and into which separate streams of nitric acid and isopropyl alcohol are introduced and in which a urea concentration effective to destroy nitrous acid is maintained is characterized in that there is passed through said boiling reaction mixture undergoing continuous distillation a stream of gas chemically indifferent to it. The indifferent gas may be, e.g., air, nitrogen, carbon dioxide or steam. The isopropyl alcohol and also the nitric acid introduced into the reaction mixture may contain urea. In an example aqueous isopropyl alcohol and nitric acid, both containing urea, are fed into a reactor containing heated aqueous nitric acid also containing urea whilst air is passed through the reaction mixture. Crude isopropyl nitrate is continuously separated from the aqueous distillate. Isopropyl alcohol may be recovered from the aqueous layer of the condensate by fractional distillation after neutralizing the nitric acid present. Specification 379,312 is referred to.

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