| 摘要 |
1,268,875. Clarifying beverages. GAF CORP. June 6, 1969 [June 12, 1968], No. 28859/69. Heading C6E. Beers, wines and vegetable beverages generally, are clarified by contacting them with a dried or undried water-insoluble, water-swellable, crosslinked N-vinyl pyrrolidone polymer or copolymer, in the form of porous granules or porous beads. The Examples are directed to the treatment of lager beer and dry white wine with porous beads between 1 and 7 mm. in diameter and in the waterswollen state (20À6% solids) composed of N-vinyl pyrrolidone polymer cross-linked with divinylbenzene. Experiments disclose the absorptive activity of N-vinyl pyrrolidone-acrylamide copolymers cross-linked with divinylbenzene, in recovering salicylic acid from aqueous solution. |
