Abstract This work demonstrates for the first time the phenomenon of continuous percrystallization using a carbon membrane derived from the pyrolysis of food grade sugar. In addition, it is also the first demonstration of membranes separating solute from solvent and delivering dry crystals in a single step. This is contrary to membrane crystallization, which requires two further processing steps to filter crystals from a solution followed by drying the wet crystal particles. The results indicate that carbonised sugar membranes can confer ideal conditions of super-saturation, leading to instantaneous and continuous percrystallization of compounds at the permeate side of the membrane. As a result, very high percrystallization production rates of up to 55,000 kg m−2 per year are achieved. It is proposed that the percrystallization occurs in a wet thin-film modulated by solution permeation via the mesopores of the membrane, where vapour and crystals are separated at the membrane's solid-liquid-vapour interface. The potential deployment of this novel technology is further demonstrated for a wide range of crystallization applications in chemical, hydrometallurgy, food and pharmaceutical industries.

中文翻译：

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用于矿物、食品和药物化合物渗透的新型无机膜

摘要 这项工作首次证明了使用源自食品级糖热解的碳膜进行连续渗透结晶的现象。此外，这也是膜分离溶质与溶剂并在一个步骤中提供干燥晶体的首次演示。这与膜结晶相反，膜结晶需要两个进一步的处理步骤来从溶液中过滤晶体，然后干燥湿晶体颗粒。结果表明，碳化糖膜可以提供理想的过饱和条件，导致膜渗透侧的化合物瞬时和连续渗透结晶。结果，实现了高达每年 55,000 kg m-2 的非常高的全结晶生产率。有人提出，渗透结晶发生在通过膜的中孔溶液渗透调制的湿薄膜中，其中蒸汽和晶体在膜的固-液-汽界面处分离。这种新技术的潜在部署在化学、湿法冶金、食品和制药行业的广泛结晶应用中得到了进一步证明。