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    • 10. 发明授权
    • Filter for a crystal purification column
    • 过滤晶体纯化柱
    • US3190450A
    • 1965-06-22
    • US21519062
    • 1962-08-06
    • PHILLIPS PETROLEUM CO
    • STOLLER FREDERICK LGOARD HOWARD W
    • B01D33/06B01D9/00B01D29/00
    • B01D9/0013B01D9/004B01D9/005B01D9/0063B01D29/17B01D29/72B01D35/153
    • 976,526. Filters for liquids; crystallizing. PHILLIPS PETROLEUM CO. July 25th, 1963 [Aug. 6, 1962], No. 29486/63. Headings B1D and B1G. A liquid feed mixture of two or more components, one of which is separable from the mixture by crystallization, is forced by a pump 3, Fig. 1, into a chiller A, where one of the components is crystallized, and then into a cylindricalshell 4 having a filtering zone B where liquid passes through a cylindrical filter 114 and leaves by a pipe 16, Figs. 1 and 2. The crystal mass passes through a reflux zone C to a heater 17 which melts the crystals. Part of the melt is withdrawn through a pipe 18 and the remainder is forced back through reflux zone C to form reflux which effects crystal purification. A piston 21 in a cylinder 19 applies a back pressure to the material in the apparatus at a frequency of from 50 to 400 (preferably 150 to 250) pulsations per minute. A thermocouple 29 is connected to a temperature-recorder-controller TRC which operates a valve 30 in pipe 18 and is adjusted so that the rate of withdrawal of melt through ippe 18 is varied to maintain a desired rate of advance of crystals through reflux zone C. The withdrawal of filtrate through pipe 16 may be controlled by a solenoid valve 32 so that filtrate is removed only on the compression stroke of piston 21. The withdrawal of melt by pipe 18 also may be controlled so that it ceases during the compression stroke of piston 21. Lists are given of compounds which may be separated from mixtures containing them. The process also may be used to remove water in the form of ice crystals from fruit and vegetable juices and other liquid food products. The foregoing is substantially disclosed in Specification 807,100 (referred to) ; the present Specification discloses also a filter structure for zone B exemplified by Fig. 2. A housing 100, 104 is attached to the purification cylinder by flanges 102 and incorporates within an annular liquid-collecting space 108, a perforate cylinder 106 enclosing a coarse screen 112 and a fine screen 114 ; all these members are openended. Preferably the screen 114 is composed .of finer wires aligned with the direction of flow, and coarser wires perpendicular thereto, numbering, e.g., 350 and 20 per inch respectively ; the screen is of twill weave and may be rolled or ground. In an example, a mixture of methanol and water was treated in the apparatus to simulate the concentrating of beer.