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    Processing polyacetals
    1.
    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.

    A perforated plate for a fluidisation reactor
    5.
    发明专利
    A perforated plate for a fluidisation reactor 未知

    公开(公告)号：GB1081660A

    公开(公告)日：1967-08-31

    申请号：GB5151764

    申请日：1964-12-18

    Applicant: BASF AG

    Inventor： MUELLER KARL-HEINZ ,  MINSINGER MANFRED ,  KLINGENSPOR HELMUT

    IPC: B01J8/44

    Abstract: A perforated plate for a fluidised reactor comprises holes closed by bolts 4, the heads of which rest on the upper surface of the plate, each bolt having a bore 5 through the shaft, communicating with bores 6 radiating therefrom and at an ange thereto of not more than 90 DEG , said bores 6 each communicating with a further bore extending vertically to the surface of the bolt head. The numerals refer to the Figures (not shown), which also illustrate the provision of heat exchange pipes 3 passing through sleeves 2, the latter being sealed into the bottom of the reactor or into an intermediate plate 7, in turn welded to the bottom of the reactor. The heat exchange tubes are sealed into the bottom of the reactor.

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