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    Purification of methanol
    2.
    发明专利
    Purification of methanol 未知

    公开(公告)号：GB1106598A

    公开(公告)日：1968-03-20

    申请号：GB3391566

    申请日：1966-07-28

    Applicant: BASF AG

    Inventor： HAHL EDGAR ,  KERBER HORST

    IPC: C07C31/04

    Abstract: Purification of crude methanol contaminated by an iron carbonyl by treatment with molecular oxygen or with hydrogen peroxide in the presence of a substance having a large specific surface area the iron carbonyl being oxidized. Specified substances having a large specific surface area, preferably from 100 to 1000 square metre/gram, include active carbon, optionally activated with a precious metal such as silver or palladium, and silica gel, diatomaceous earth, an alumina or a bleaching earth. Preferred amounts of molecular oxygen or hydrogen peroxide are specified. The process may be effected at a temperature in the range 0-200 DEG C. under atmospheric or superatmospheric pressure optionally in the presence of specified substances which form complexes with iron.

    Production of dialkyl ketones
    3.
    发明专利
    Production of dialkyl ketones 未知

    公开(公告)号：GB1090287A

    公开(公告)日：1967-11-08

    申请号：GB830265

    申请日：1965-02-26

    Applicant: BASF AG

    Inventor： HAHL EDGAR

    IPC: C07C45/48

    Abstract: Dialkyl ketones are prepared by heating saturated aliphatic carboxylic acids, in the gas phase at temperatures of 250 DEG to 500 DEG C. in the presence of a solid catalyst comprising a mixture of manganese dioxide and titanium dioxide. The carboxylic acids used preferably contain 2 to 18 carbon atoms, and are in particular, acetic acid, propionic acid, butyric acid, isobutyric acid and caproic acid. The catalyst mixture which can be used stationary or fluidized has a preferred particle size of from 100 microns to 600 microns. The ratio by weight of manganese dioxide to titanium dioxide is suitably from 1.0:1.5 to 1.0:5.0. The catalyst can take the form of pellets prepared from a paste of a mixture of the dioxides, dried and then heated for several hours at 400 DEG to 500 DEG C. in air or in the absence of oxygen, or it can be coemployed with either inert carrier substances such as diatomaceous earth or substances which themselves have catalytic activity for the reaction, such as the oxides of zinc, cadmium, thorium, uranium, aluminium, zirconium, magnesium, cerium, chromium, iron or divalent manganese. The metal oxides may also be replaced wholly or partly by other compounds of the metals which are converted to the dioxides on heating, such as the nitrates, hydroxides, carbonates or oxalates. A particularly suitable method is that in which catalysts to be used in a fluidized bed are prepared by impregnating titanium dioxide with an aqueous solution of manganese nitrate and further processing as described above. The catalyst may be regenerated, for example, by calcination in the air and subsequent treatment with concentrated nitric acid.ALSO:A catalyst used in the preparation of dialkyl ketones (see Div. C2) comprises a mixture of manganese dioxide and titanium dioxide. The catalyst mixture, which can be used stationary or fluidised, has a preferred particle size of from 100 microns to 600 microns. The ratio by weight of manganese dioxide to titanium dioxide is suitably from 1.0:1.5 to 1.0:5.0. The catalyst can take the form of pellets made from a paste of a mixture of the dioxides, dried and then heated for several hours at 400 DEG C to 500 DEG C in air or in the absence of oxygen, or it can be coemployed with either inert carrier substances such as diatomaceous earth or substances which themselves have catalytic activity for the reaction, such as the oxides of aluminium, zinc, cadmium, thorium, uranium, zirconium, magnesium, cerium, chromium, iron or divalent manganese. The metal oxides may also be replaced wholly or partly by other compounds of the metals which are converted to the dioxides on heating, such as the nitrates, hydroxides, carbonates or oxalates. A particularly suitable method is that in which catalysts to be used in a fluidised bed are prepared by impregnating titanium dioxide with an aqueous solution of manganese nitrate and further processing as above. The catalyst may be regenerated, for example, by calcination in the air and subsequent treatment with concentrated nitric acid.

    Process for the production of benzene carboxylic acids
    4.
    发明专利
    Process for the production of benzene carboxylic acids 未知

    公开(公告)号：GB897801A

    公开(公告)日：1962-05-30

    申请号：GB3325660

    申请日：1960-09-28

    Applicant: BASF AG

    Inventor： HAHL EDGAR ,  BECKE FRIEDRICH ,  SPEER WALTER

    IPC: C07C51/265

    Abstract: Benzene carboxylic acids, anhydrides or mixtures thereof are prepared by liquid phase oxidation, with molecular oxygen at an elevated temperature in presence of an oxidation catalyst and gamma-butyrolactone as solvent, of benzene derivatives, optionally nuclear-substituted by chlorine or carboxyl, which contain 1-3 C1-3 side chains selected from alkyl monochloralkyl, dichloroalkyl and hydroxyalkyl groups. In examples, benzoic acid is obtained from toluene or benzyl alcohol, terephthalic acid from p-xylene, p-cymene or p-toluic acid, isophthalic acid from m-xylene, p-chlorobenzoic acid from p-chlorotoluene and phthalic anhydride from o-xylene, using promoters selected from Co 2-ethylhexanoate + NH4Br or isobutyraldehyde, Cr (III) nitrate + Co (II) phosphate, and NH4VO3 + NaBr. Other specified starting materials are: trimethylbenzene, cumene, diisopropyl benzene, chloromethylbenzene xylyl chloride and xylylidene and xylylene dichlorides. Specifications 737,439, 762,849 and 798,342, also U.S.A. Specification 2,245,528 and German Specification 767,366 are referred to.

    Production of metal salts of organic acids
    5.
    发明专利
    Production of metal salts of organic acids 未知

    公开(公告)号：GB934969A

    公开(公告)日：1963-08-21

    申请号：GB4284761

    申请日：1961-11-30

    Applicant: BASF AG

    Inventor： HAHL EDGAR

    IPC: C07C51/41

    Abstract: Aliphatic carboxylic acid salts of metals, having a normal electrode potential of -0,80 to +0,5 volts, are prepared by reacting a pulverulent metal with the acid diluted with water or an inert organic solvent, at a temperature between room temperature and the boiling point of the acid, in the presence of free oxygen and an activator consisting of the bromide of the metal. Saturated aliphatic monocarboxylic acids, e.g. formic, acetic, propionic and butyric acids, a -ethyl hexanoic acid and unsaturated acids such as oleic are referred to, and the diluents may be g -lactones, nitriles and alkylene carbonates. Chromium, cobalt, nickel, and lead salts are prepared and copper, bismuth and iron salts are mentioned, and pure oxygen or air may be the oxidising agent. The bromides may be prepared in situ by adding metal carbonates with hydrogen bromide or tetrabromoethane, or by adding bromine to the reaction mixture. The process may be batchwise or continuous.

    6.
    发明专利
    未知

    公开(公告)号：FR1307216A

    公开(公告)日：1962-10-19

    申请号：FR880658

    申请日：1961-12-01

    Applicant: BASF AG

    Inventor： HAHL EDGAR

    IPC: C07C51/41

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