Method for concentrating water-soluble organic material
AssigneeMitsubishi Chemical Corporation
InventorShiro Ikeda
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Abstract
A method for concentrating a water-soluble organic material wherein a mixture of the water-soluble organic material with water is distilled in a distillation column (11), and the fraction from the top (11a) of the distillation column (11) is separated by the use of a membrane separator (14) into a permeated vapor (F2) and a non-permeated vapor (F3), which comprises once condensing the fraction to form a condensate, heating the condensate in an evaporator (13) to generate a vapor (F1) having a pressure higher than the operation pressure for the distillation column (11), and introducing the vapor (F1) to the membrane separator (14), thereby separating water from the mixture.
Claims9
A method for concentrating a water-soluble organic material comprising:
- distilling a mixture of the water-soluble organic material with water in a distillation column,
- condensing a fraction from a top section of said distillation column into a condensate,
- returning a part of said condensate to said distillation column via a pump and introducing the rest of said condensate to an evaporator via said pump,
- heating the rest of said condensate within said evaporator to generate a vapor mixture with a higher pressure than an operating pressure of said distillation column,
- introducing said vapor mixture with the higher pressure to a membrane separator, and
- separating said vapor mixture into a non-permeated vapor and a permeated vapor that is rich in water in said membrane separator.
Dependencies are inferred from the claim text.