PROCESS FOR THE PREPARATION OF 2-HYDROXY ETHYLIDENE-CYANO ACETIC ANILIDE

    公开(公告)号:KR800000742B1

    公开(公告)日:1980-08-02

    申请号:KR760001516

    申请日:1976-06-18

    Applicant: HOECHST AG

    Abstract: Title compds. (I, R1, R2, R3 = C1-3 alkyl, C1-3 alkoxy, C1-3 alkylthio, halogen, nitro, cyano, alkoxycarbonyl; M = H, alkali metal, ammonium), useful as an antiphlogistics or an anodyne, were prepd. by heating acetoacetic anilide(II) with formic ester(III) and followed by treating with acetic anhydride to give 2-alkixy-methylene-acetoacetic anilide(IV). The reaction of IV with hydroxyamine in org. solvent gave isoxazole(V), which was reacted with base and followed by reacting with org. strong acid to give I.

    Process for the recovery of antimony pentachloride from catalyst solutions
    2.
    发明授权
    Process for the recovery of antimony pentachloride from catalyst solutions 失效
    从催化剂解决方案中恢复抗氧化剂的方法

    公开(公告)号:US3760059A

    公开(公告)日:1973-09-18

    申请号:US3760059D

    申请日:1971-11-16

    Applicant: HOECHST AG

    Inventor: ERTEL H FRISCH P

    CPC classification number: C01G30/007 B01J27/06

    Abstract: The invention relates to the recovery of antimony pentachloride from catalyst solutions, which are used for the fluorination of chlorosubstituted methanes or ethanes. The process is based on the reduction of antimony pentachloride, which is dissolved in a used catalyst solution by means of trichloroethylene, at a temperature of from 100* C to 170* C. The crystalline antimony trichloride obtained precipitates from the solution and is separated from all the impurities. The antimony trichloride obtained can be re-oxidized to form antimony pentachloride by any known process.

    Abstract translation: 本发明涉及从催化剂溶液中回收五氯化锑,其用于氯取代的甲烷或乙烷的氟化。 该方法基于在100℃至170℃的温度下,通过三氯乙烯溶解在所用催化剂溶液中的五氯化锑的还原。结晶三氯化锑从溶液中获得沉淀,并从 所有的杂质。 获得的三氯化锑可以通过任何已知的方法再氧化形成五氯化锑。

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