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    • 2. 发明专利
    • Separating volatile materials
    • GB2057909A
    • 1981-04-08
    • GB7919649
    • 1979-06-06
    • CHENG CHEN YENSING WANG CHENG
    • B01D7/02
    • A crystallization process for in the vapor, the vapor then having separating a partially liquid mixture containing volatile components (A and B) forming a binary system in having a vapor pressure ratio A:B 0.1 to 10 at the B-triple point less than the ratio heat of sublimation to heat of melting of the B-component. The phase diagram has a B- enriched solid-vapor region above the three phase state temperature and a B-enriched solid/liquid region below such temperature. A first mixture of vapour and condensate are formed by vaporizing both components below the triple point, the first condensate comprising mother liquor and a B-enriched solid, the heat released being utilized to vaporize the components. A gas containing volatile and condensable components can be separated. Heat is removed to cause part of B to desublime, the A remaining in the vapor, the vapor then having heat removed therefrom while below the B-triple point to form a further condensate.
    • 6. 发明专利
    • Separation of fresh water from an aqueous solution by the high pressure inversion of the order of melting points
    • GB1145568A
    • 1969-03-19
    • GB1660066
    • 1966-04-15
    • SING WANG CHENGCHENG CHEN YEN
    • C02F1/22
    • 1,145,568. Purifying water by freezing. SING-WANG CHENG, and CHEN-YEN CHENG. 14 March, 1967 [15 April, 1966], No. 16600/66. Heading F4H. A freeze-purification process for aqueous solutions, e.g. sea-water, employs a heatexchange medium which, under a relatively low pressure, is melted while absorbing the heat of freezing of the ice and, under a relatively high pressure, is solidified while supplying the heat of fusion of the ice. As shown, sea-water is filtered, heat exchanged with concentrated brine and product water, refrigerated and passed to an ice maker in which it is directly contacted with a slurry of a solid organic material under low pressure. The resultant ice, concentrated brine and organic liquid pass to a separator S 1 from which ice and brine are withdrawn by a pump J 1 and passed to an ice-washer. Part of the organic liquid from S 1 is passed to a highpressure ice melter by a high pressure pump J H and the remainder slurries the ice from the icewasher, this slurry being passed by a lowpressure pump J L to a set of vessels O 1 -O 4 in which it is pressurized by high-pressure streams of fresh water and organic slurry from a separator S 2 downstream of the ice melter, the pressurized slurry being supplied to the ice melter. The fresh water and organic slurry streams from vessels O 1 -O 4 are now at low pressure and are respectively removed as product and recycled to the ice maker. The heat exchange medium may be a pure compound or a eutectic or other mixture of substances; suitable media are listed.
    • 9. 发明授权
    • Wet and dry distillative freezing process for separating mixtures and
apparatuses for use therein
    • 用于分离其中使用的混合物和设备的湿和干蒸馏冷冻方法
    • US4578093A
    • 1986-03-25
    • US613573
    • 1984-05-24
    • Chen-Yen ChengSing-Wang Cheng
    • Chen-Yen ChengSing-Wang Cheng
    • B01D9/00B01D9/04F25J3/00
    • B01D9/04B01D9/0009
    • A wet and dry distillative freezing process is provided which comprises (a) a first step of transforming a liquid feed mixture into a first solid-liquid mixture, denoted as K.sub.-1 mixture, by either a conventional freezing operation or a wet distillative freezing operation, (b) a second step of washing the K.sub.-1 mixture with a wash liquid to thereby form a second solid-liquid mixture, denoted as K.sub.o mixture, and an impure liquid L.sub.o, and (c) a third step of subjecting the K.sub.o mixture to a dry distillative freezing operation to thereby form a mass of refined solid phase, denoted as S.sub.1, and a low pressure vapor V.sub.1. Various wash liquids may be used in the crystal washing step. It is important to note that the wash liquid used does not have to be a pure liquid but may contain some volatile impurities. This is so, because the volatile impurities in the wash liquid will be taken up in the K.sub.o mixture and will be removed in the dry distillative freezing step. Convenient wash liquids to use are (a) a mass of the feed liquid, (b) a mass of the condensate liquid, and (c) a part of the product liquid. One may also use a solution containing the crystallizing component and a selected volatile component as a wash liquid.
    • 提供了一种湿和干蒸馏冷冻方法,其包括(a)通过常规冷冻操作或湿蒸馏冷冻操作将液体进料混合物转化为第一固体 - 液体混合物(表示为K-1混合物)的第一步骤 ,(b)用洗涤液洗涤K-1混合物,从而形成表示为Ko混合物的第二固体 - 液体混合物和不纯液体Lo的第二步骤,和(c)使Ko 混合物进行干蒸馏冷冻操作,从而形成表示为S1的精制固相质量和低压蒸汽V1。 在洗涤步骤中可以使用各种洗涤液体。 重要的是注意使用的洗涤液不一定是纯液体,而是可能含有一些挥发性杂质。 这是因为洗涤液中的挥发性杂质将被吸收在Ko混合物中,并且将在干蒸馏冷冻步骤中除去。 使用方便的洗涤液体是(a)一定量的进料液体,(b)一定量的冷凝液体,和(c)一部分产物液体。 还可以使用含有结晶组分和选择的挥发性组分作为洗涤液的溶液。
    • 10. 发明授权
    • Fractional solidification process and apparatuses for use therein
    • 分数凝固工艺及其中使用的装置
    • US4489571A
    • 1984-12-25
    • US565856
    • 1983-12-27
    • Sing-Wang ChengChen-Yen Cheng
    • Sing-Wang ChengChen-Yen Cheng
    • B01D9/00B01D9/02
    • B01D9/004
    • The present invention introduces a process for effectively washing a crystal-liquid (mother liquor) mixture with a mass of wash liquid to thereby form a mass of highly purified crystals and also introduces apparatuses for use therein. The purification is accomplished by properly conducted alternative stationary and agitated crystal washing operations and substantially countercurrent transfer of the solid phase and the free liquid in a purification zone. The zone contains a set of stationary washing sub-zones and a set of agitated washing sub-zones that are laid alternatively along the vertical direction.The mass of crystals in a stationary sub-zone is compacted by a compacting means to form a bed with an enhanced degree of compaction. The masses of crystals and liquid in each agitated sub-zone are properly agitated so that the impurities in the mother liquors retained in the crystal mass are released to the free liquid. It is important either to reduce the amount of liquid that is transferred with the crystals or counterwash the crystals during an inter sub-zone transfer of the solid phase. Means for accomplishing these functions are incorporated in the apparatuses of this invention. Because of the properly conducted alternative stationary and agitated washing operations and the properly conducted inter sub-zone transfers of the solid phases and the free liquids, the impurity concentrations of the liquids retained in the solid phases transferred between sub-zones decrease sequentially, nearly following a geometric sequence rather than approaching a limiting value.
    • 本发明引入了一种用洗涤液质量洗涤晶体 - 液体(母液)混合物的方法,从而形成大量高纯度晶体,并引入了其中使用的装置。 净化通过适当地进行的替代的静止和搅动的晶体洗涤操作和在纯化区中固相和游离液体的基本上逆流转移来实现。 该区域包含一组固定的洗涤子区域和一组沿垂直方向交替布置的搅动洗涤子区域。 固定子区域中的晶体质量通过压实装置压实以形成具有增强压实度的床。 适当地搅拌每个搅拌的亚区域中的晶体和液体的质量,使保留在结晶物质中的母液中的杂质释放到游离液体中。 重要的是减少用晶体转移的液体量或在固相的亚区域转移过程中反洗洗涤晶体。 用于实现这些功能的手段被并入本发明的装置中。 由于适当进行的固定和搅拌的洗涤操作以及固相和游离液体的适当传导的子区间转移,保留在子区域之间转移的固相中的液体的杂质浓度依次降低,几乎跟随 几何序列而不是接近极限值。