Importance

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Abstract

For continuous production of qualitatively high-grade lactose monohydrate crystals from a solution, the invention proposes the preparation of a highly concentrated solution in a falling film evaporator, from the pre-concentrated solution, which is then subjected to continuous cold crystallization with forced circulation and from which a lactose suspension is drawn off that forms the product crystals following separation of the transported solution. The product crystals are thereby obtained directly by solid/liquid separation, without further crystallization steps from the suspension that was drawn off from the cold crystallization. A portion of the mother solution separated off from the product crystals is fed back to a point prior to the inlet to the falling film evaporator, the remainder of the mother solution is discarded.

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First Claim