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    PROCESS FOR THE OBTENTION OF ANHYDROUS OR SUBSTANTIALLY ANHYDROUS FORMIC ACID
    1.
    发明专利
    PROCESS FOR THE OBTENTION OF ANHYDROUS OR SUBSTANTIALLY ANHYDROUS FORMIC ACID 未知

    公开(公告)号：DE3060960D1

    公开(公告)日：1982-11-25

    申请号：DE3060960

    申请日：1980-04-03

    Applicant: BASF AG

    Inventor： WOLF DIETER DR ,  SCHMIDT RUDOLF DR ,  BLOCK ULRICH DR ,  SCHOENMAKERS HARTMUT DR ,  BOTT KASPAR DR ,  KAIBEL GERD

    IPC: C07C53/02 ,  C07C27/02 ,  C07C51/00 ,  C07C51/09 ,  C07C51/42 ,  C07C51/44 ,  C07C51/48 ,  C07C67/00

    Abstract: Anhydrous or substantially anhydrous formic acid is obtained by hydrolysis of methyl formate, in a process wherein (a) methyl formate is hydrolyzed, (b) the methanol and excess methyl formate are distilled from the hydrolysis mixture obtained, (c) the bottom product of distillation (b), consisting of formic acid and water, is extracted, in a liquid-liquid extraction, with an extractant which in the main takes up the formic acid, (d) the resulting extract phase, consisting of formic acid, the extractant and a part of the water, is subjected to distillation, (e) the top product obtained from this distillation and consisting of all or part of the water introduced into the distillation, and part of the formic acid, is recycled, as vapor, into the lower part of the distillation column of stage (b), (f) the bottom product of distillation stage (d), consisting of the extractant, with or without part of the water, and the greater part of the formic acid, is separated by distillation into anhydrous or substantially anhydrous formic acid and the extractant, and (g) the extractant leaving stage (f) is recycled to the process.

    2.
    发明专利
    未知

    公开(公告)号：DE1768460B1

    公开(公告)日：1972-05-31

    申请号：DE1768460

    申请日：1968-05-16

    Applicant: BASF AG

    Inventor： NAGEL OTTO DR ,  PLATZ ROLF DR ,  TAGLIEBER KURT DIPL-ING ,  WEINFURTNER KURT DIPL-ING ,  WOLF DIETER DR

    IPC: C07C7/00 ,  F25J3/02 ,  C07C7/02

    Abstract: A gas mixture (obtained by thermal cracking of hydrocarbons followed by quenching of the cracked gas and freed from carbon dioxide and water) is separated into a gas mixture containing hydrogen, carbon monoxide and methane and another gas mixture containing ethylene, acetylene and higher hydrocarbons by (a) cooling the gas mixture which is at superatmospheric pressure in at least one condensation stage to a temperature which is above the solidification temperature of acetylene mixed with the other condensed constituents, (b) separating the condensate thus obtained and subdividing it in a rectifying column into a first mixture containing C2 hydrocarbons and a second mixture containing C3 and higher hydrocarbons, and (c) freeing the residual gas remaining from (a) from residual acetylene and ethylene in a scrubber by treatment with some of the mixture consisting of C3 and higher hydrocarbons from (b).

    PROCESS FOR THE PREPARATION OF HYDROXYL AMMONIUM SALTS
    4.
    发明专利
    PROCESS FOR THE PREPARATION OF HYDROXYL AMMONIUM SALTS 未知

    公开(公告)号：DE2860073D1

    公开(公告)日：1980-11-13

    申请号：DE2860073

    申请日：1978-08-09

    Applicant: BASF AG

    Inventor： RAPP GUENTHER DR ,  THOMAS ERWIN ,  WOLF DIETER DR ,  KUERTEN HERIBERT ,  ZEHNER PETER DR

    IPC: B01J10/00 ,  B01J19/24 ,  B01J19/26 ,  B01J23/00 ,  C01B21/14

    Abstract: Hydroxylammonium salts are manufactured by a process comprising the catalytic reduction of nitric oxide with hydrogen in a dilute aqueous solution of a mineral acid in the presence of a suspended platinum catalyst at an elevated temperature, wherein the reaction mixture is recycled and the gas mixture, containing nitric oxide and hydrogen, present in the gas space above the reaction zone, is introduced, by means of one or more downwardly directed jets of liquid, consisting of the recycled reaction mixture and issuing from a nozzle orifice, into one or more circulation zones which are present in the reaction zone, are open at both sides, extend in the direction of the entering jet of liquid and are completely covered by the reaction mixture, the reaction mixture leaving the bottom of the circulation zone and containing unconverted gases is deflected, passed upwards in the annular zone externally surrounding the circulation zone, and at the same time reaction mixture of low gas content is recycled from a separation zone located under the reaction zone.

    8.
    发明专利
    未知

    公开(公告)号：DE2322709A1

    公开(公告)日：1974-11-28

    申请号：DE2322709

    申请日：1973-05-05

    Applicant: BASF AG

    Inventor： WOLF DIETER DR ,  BENDER EBERHARD DR ,  WEBER THEODOR

    IPC: C07D319/12 ,  C07D15/10

    Abstract: Dioxane is produced by reaction of ethylene glycol or a polyethylene glycol using an acid catalyst. The reaction product containing dioxane, water and byproducts is subjected to extractive distillation with a high-boiling agent which is miscible with water.

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