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    Processing polyacetals
    32.
    发明专利
    Processing polyacetals 未知

    公开(公告)号：GB1119332A

    公开(公告)日：1968-07-10

    申请号：GB4760065

    申请日：1965-11-10

    Applicant: BASF AG

    Inventor： HEEL HELMUT ,  SPERBER HEINRICH ,  KLINGENSPOR HELMUT

    IPC: C08G2/00 ,  C08G2/28

    Abstract: Copolymers of trioxane which contain catalyst, monomeric starting material and unstable chain segments are worked up by rapidly melting the crude polymer together with an activator for the catalyst while being intensely kneaded and is then conveyed rapidly in the molten condition through a zone under vacuum in a degassing apparatus. Specified comonomers are cyclic acetals, cyclic ethers, cyclic lactones, vinyl ether and polyacetals. Specified inactivators are sodium carbonate, potassium carbonate, sec-sodium phosphate and sodium formate at least part of these, e.g. 10 to 80% may be replaced by neutral inactivators, e.g. the alkali metal and alkaline earth metal chlorides and fluorides. The inactivators may be sprayed into the melting zone in the form of dilute solutions in e.g. water or alcohols. The molten polymer may be conveyed through the vacuum zone within a period of sixty seconds and through a plurality of degassing zones arranged in series while a solution of a conventional costabilizer may be added after the polymer has passed through at least one degassing zone.

    Dehydrogenation of cycloalkanols
    33.
    发明专利
    Dehydrogenation of cycloalkanols 未知

    公开(公告)号：GB1061447A

    公开(公告)日：1967-03-15

    申请号：GB4969663

    申请日：1963-12-17

    Applicant: BASF AG

    Inventor： SPERBER HEINRICH ,  POEHLER GUENTER ,  GOEHRE OTTO

    IPC: B01J21/00 ,  B01J23/06 ,  C07C45/00

    Abstract: The gas phase dehydrogenation of cycloalkanols to cycloalkanones is conducted at elevated temperature in presence of a catalyst consisting of at least 80% of ZnO which has been obtained by precipitation from a Zn salt with a basic precipitant, and drying and annealing the ZnO, which has a surface of 5-20 m.2/g. The production of cyclohexanone from cyclohexanol is exemplified; other specified starting materials are 4-methylcyclohexanol, cyclooctanol and cyclododecanol.ALSO:ZnO, intended for use as a dehydrogenation catalyst, is prepared by precipitation from a Zn salt with a basic precipitant, dried and annealed to obtain a surface of 5-20 m2/g. The precipitate may be slowly heated to 400 DEG C. and annealed at between 400 DEG and 600 DEG C. until the desired surface is obtained. An after-treatment with H2 at 300-500 DEG is optional.ALSO:A dehydrogenation catalyst comprises ZnO which has been prepared by precipitation from a Zn salt with a basic precipitant, dried and annealed to obtain a surface of 5-20 m2/g. Ingredients which may be present in an amount of up to 20% are: pumice or other silicates, Cu compounds, alkali or alkaline earth metal salts of mineral acids and rare earth compounds; the Cu compounds may be e.g. oxide, hydroxide, carbonate or nitrate. The ZnO is preferably annealed at 400-600 DEG C. and may be treated with H2 at 300-500 DEG before use. A binding agent such as starch, graphite or stearic acid may be used in making the catalyst.

    Production of phenols
    37.
    发明专利
    Production of phenols 未知

    公开(公告)号：GB944768A

    公开(公告)日：1963-12-18

    申请号：GB4365261

    申请日：1961-12-06

    Applicant: BASF AG

    Inventor： POEHLER GUENTER ,  SPERBER HEINRICH

    IPC: B01J23/70 ,  B01J37/02 ,  C07C37/06 ,  C07C37/07

    Abstract: Phenol itself and phenols substituted by one or two alkyl radicals containing from 1 to 4 carbon atoms are produced by dehydrogenating the corresponding cyclohexanols and/or cyclohexanones at temperatures between 200 DEG and 500 DEG C. by means of a catalyst comprising as active metallic component cobalt and/or nickel in an amount of 3 to 50% by weight with reference to the whole catalyst, on a carrier which contains at least 20% of iron oxide with reference to the carrier and calculated as ferric oxide, the throughput being 0.1 to 5 Kg of the cyclohexanols and/or cyclohexanones per litre of catalyst per hour. The carrier may contain only iron oxide but preferred carriers are those containing 30 to 80% by weight of iron oxide with the remainder being made up of aluminium oxide, silicon dioxide, titanium dioxide, zinc oxide or magnesium oxide or mixtures of these oxides. The additional oxides may enter into combination with the iron oxide. Advantageously the catalyst also contain 0.2 to 10% by weight with reference to the carrier of an alkali metal oxide or an alkaline earth metal oxide and 1 to 20% by weight with reference to the active metallic components of the catalyst of a catalyst promoter, e.g. the oxides of chromium, manganese, molybdenum, tungsten and vanadium. The dehydrogenation reaction may be carried out with an addition of hydrogen and preferably in the presence of steam. For each mole of initial material it is advantateous to use 0.5 to 10 moles of water but when the initial material contains cyclohexylamines it is desirable to use in addition 12 to 100 moles of water per mole of cyclohexylamines. The process is usually carried out in the vapour phase at atmospheric pressure although increased and reduced pressures may be employed. Specification 640,363 is referred to.ALSO:A catalyst used for dehydrogenation comprises as active metallic component cobalt and/or nickel in an amount of 3 to 50% by weight with reference to the whole catalyst, on a carrier which contains at least 20% of iron oxide with reference to the carrier and calculated as ferric oxide. The iron oxide in the carrier may be present as ferrous oxide, ferric oxide or ferrosoferric oxide or mixtures thereof. The carrier may contain only iron oxide but preferred carriers are those containing 30 to 80% by weight of iron oxide with the remainder being made up of aluminium oxide, silicon dioxide, titanium dioxide, zinc oxide or magnesium oxide or mixtures of these oxides. The additional oxides may enter into combination with the iron oxide. Advantageously the catalyst also contains 0,2 to 10% by weight with reference to the carrier of an alkali metal oxide or an alkaline earth metal oxide and 1 to 20% by weight with reference to the active metallic components of the catalyst of a catalyst promoter, e.g. the oxides of chromium, manganese, molybdenum, tungsten and vanadium. Specification 640,363 is referred to.

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