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    • 17. 发明公开
    • SEMI-CONTINUOUS CRYSTALLIZATION METHOD AND APPARATUS
    • 半连续结晶方法和装置
    • EP3108947A1
    • 2016-12-28
    • EP15173637.8
    • 2015-06-24
    • Sulzer Chemtech AG
    • Pfeil, MathiasStepanski, Manfred
    • B01D9/00C07B63/00C07C7/14C07C51/43
    • C07B63/00B01D9/0013B01D9/004B01D2009/0086C07C7/14C07C51/43C07C15/08C07C15/02C07C59/08
    • A process for the separation of a substance from a liquid feed mixture and for the purification of the substance by fractional layer crystallization, wherein the liquid feed mixture comprises the substance to be separated and purified in a concentration of less than 70 % by weight, which comprises the subsequent steps in the given order:
      (a) feeding the liquid feed mixture into a crystallization zone, in which at least one surface is provided, so that at least a part of the surface contacts the liquid feed mixture,
      (b) cooling the at least one surface of the crystallization zone to a temperature below the equilibrium freezing temperature of the liquid feed mixture so that a crystal layer enriched in the substance to be separated and purified is deposited on the at least one cooled surface, whereby a mother liquid having a lower concentration of the substance to be separated and purified than the liquid feed mixture is formed from the liquid feed mixture,
      (c) removing at least a portion of the mother liquid from the crystallization zone,
      (d) adding a further portion of liquid feed mixture into the crystallization zone,
      (e) allowing further deposition of a crystal layer enriched in the substance to be separated and purified to take place on the at least one cooled surface,
      (f) optionally carrying out a sweating stage and removing a sweating residue and
      (g) melting the crystal layer to obtain the separated and purified substance.
    • 一种从液体进料混合物中分离物质和通过分层结晶纯化物质的方法,其中液体进料混合物包含待分离和纯化的物质,其浓度小于70重量%,其中 包括以给定顺序的后续步骤:(a)将液体进料混合物进料到结晶区中,其中提供至少一个表面,使得至少一部分表面接触液体进料混合物,(b)冷却 将结晶区的至少一个表面冷却到低于液体进料混合物的平衡冷冻温度的温度,使得富集待分离和纯化的物质的晶体层沉积在至少一个冷却表面上,由此得到母液 (c)从所述液体进料混合物形成具有比所述液体进料混合物更低浓度的待分离和纯化的物质,(c)除去至少一部分 (d)将另一部分液体进料混合物加入到结晶区中,(e)允许进一步沉积富含待分离和纯化的物质的晶体层以在所述结晶区中发生 至少一个冷却表面,(f)任选地进行发汗阶段并除去发汗残余物,和(g)熔化结晶层以获得分离和纯化的物质。