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    22.
    发明专利
    未知

    公开(公告)号：DE4142578A1

    公开(公告)日：1993-06-24

    申请号：DE4142578

    申请日：1991-12-21

    Applicant: BASF AG

    Inventor： WEISS ROBERT DR ,  GOTTSCHALK AXEL DR ,  MUEHLBACH KLAUS DR ,  HEDTMANN-REIN CAROLA DR ,  HEINZ ROBERT

    IPC: C08G65/46 ,  C08J3/00 ,  C08L25/02 ,  C08L71/12

    Abstract: To prepare thermoplastic moulding compositions from pulverulent polyphenylene ethers and vinyl-aromatic polymers by melt extrusion, the pulverulent polyphenylene ether is first compacted and/or sintered under pressure and optionally at elevated temperature, preferably under a pressure corresponding to a linear force of from 1 to 100 kN/cm, to give a porous compact. The compact is then fed, in the form of agglomerates having a particle size of from 0.5 mm to about 20 mm, into an extruder or the like, mixed with the vinyl-aromatic polymer and optionally further components, and melted. In this way, the fines content of the polyphenylene ether is significantly reduced, so that there is virtually no longer any danger of dust explosions. Further advantages are better meterability and reduced electrostatic charging of the agglomerates. The extruded moulding compositions are distinguished by good mechanical properties and high thermal stability.

    23.
    发明专利
    未知

    公开(公告)号：DK163172C

    公开(公告)日：1992-06-22

    申请号：DK602085

    申请日：1985-12-23

    Applicant: BASF AG

    Inventor： BUEHLER VOLKER ,  HOFMANN FRIEDBERT ,  HEINZ ROBERT

    IPC: A61K9/14 ,  A61K9/16 ,  A61K31/375 ,  B01J2/22

    Abstract: Ascorbic acid granules for direct tableting are prepared by the compacting method, wherein the ascorbic acid in the form of crystals or crystal fragments, of which not more than 40% by weight have a longest particle diameter of less than 50 mu m and not more than 15% by weight have a longest particle diameter greater than 500 mu m, and as a mixture with from 0.8 to 8% by weight of soluble polyvinylpyrrolidone having a water content of from 0.3 to 5% is compacted in a conventional manner, and the product is comminuted.

    PROCESS FOR PRODUCING GRANULES OF ASCORBINIC ACID
    24.
    发明专利
    PROCESS FOR PRODUCING GRANULES OF ASCORBINIC ACID 未知

    公开(公告)号：HU195107B

    公开(公告)日：1988-04-28

    申请号：HU493785

    申请日：1985-12-20

    Applicant: BASF AG

    Inventor： BUEHLER VOLKER ,  HOFMANN FRIEDBERT ,  HEINZ ROBERT

    IPC: A61K9/14 ,  A61K9/16 ,  A61K31/375 ,  B01J2/22 ,  A61K31/70

    Abstract: Ascorbic acid granules for direct tableting are prepared by the compacting method, wherein the ascorbic acid in the form of crystals or crystal fragments, of which not more than 40% by weight have a longest particle diameter of less than 50 mu m and not more than 15% by weight have a longest particle diameter greater than 500 mu m, and as a mixture with from 0.8 to 8% by weight of soluble polyvinylpyrrolidone having a water content of from 0.3 to 5% is compacted in a conventional manner, and the product is comminuted.

    26.
    发明专利
    未知

    公开(公告)号：DE502004004050D1

    公开(公告)日：2007-07-19

    申请号：DE502004004050

    申请日：2004-11-05

    Applicant: BASF AG

    Inventor： HAUK ALEXANDER ,  KARL JOERN ,  PASCHOLD JUERGEN ,  GROPP STEFAN ,  LOHMANN ANNA VALESKA ,  LENZ ROBERT ,  LETZELTER THOMAS ,  HEINZ ROBERT

    IPC: C07C51/09 ,  C07C51/41 ,  C07C53/02 ,  C07C53/06

    Abstract: A process is proposed for preparing acid formates in which a liquid stream I comprising formic acid and a liquid stream II comprising a metal formate are prepared, the liquid streams I and II are fed to a rectification column in such a manner that a higher or identical feed point to the rectification column is chosen for the liquid stream II than for the liquid stream I, the liquid streams I and II are mixed in the rectification column, with water being removed overhead from the rectification column and a bottoms stream comprising the acid formate is taken off from the rectification column, which comprises the bottoms stream being produced as melt comprising less than 0.5% by weight of water.

    Preparing solid sodium formate, useful as fodder additive for animal fodder, comprises preparing aqueous solution having sodium formate and formic acid, reacting solid phase with base to form mixture, mixing mixture with formic acid
    27.
    发明专利
    Preparing solid sodium formate, useful as fodder additive for animal fodder, comprises preparing aqueous solution having sodium formate and formic acid, reacting solid phase with base to form mixture, mixing mixture with formic acid 未知

    公开(公告)号：DE102005062931A1

    公开(公告)日：2007-07-05

    申请号：DE102005062931

    申请日：2005-12-29

    Applicant: BASF AG

    Inventor： HAUK ALEXANDER ,  GROPP STEFAN ,  LOHMANN ANNA VALESKA ,  HEINZ ROBERT

    IPC: C07C53/06 ,  C07C51/41 ,  C07C51/42 ,  C07C53/02

    Abstract: Preparation of a solid sodium formate preparation comprises (i) preparing an aqueous solution, which exhibits formic acid, sodium formate and water; (ii) subjecting the aqueous solution to crystallization and separating a solid phase from mother liquor; (iii) supplying the mother liquor during the production of the aqueous solution, to a distilling device; (iv) mixing the mother liquor with a sodium-containing base to form a mixture containing sodium formate and formic acid; (v) mixing the mixture with formic acid; and (vi) removing the water by withdrawing from the distilling device. Preparation of a solid sodium formate preparation with a content of at least 35 wt.% of formic acid, comprises: (i) at increased temperature, preparing an aqueous solution, which exhibits a molar ratio of formic acid and sodium formate of more than 1.5:1 and a molar ratio of formic acid and water of at least 1.1:1; (ii) subjecting the aqueous solution to crystallization and separating a solid phase from mother liquor; (iii) supplying the mother liquor, optionally after removal of a partial quantity of the mother liquor, during the production of the aqueous solution, to a distilling device; (iv) mixing the mother liquor with a sodium-containing base to form a mixture containing sodium formate and formic acid; (v) mixing the mixture with formic acid under receipt of the aqueous solution; and (vi) removing the water that is not needed for the production of the aqueous solution, by withdrawing from the distilling device.

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