CONCENTRATION SYSTEM OF SOLVENT-CONTAINING SUBSTANCE AND CONCENTRATED LIQUID

Japanese Patent JP2021175403

A

To provide a system capable of operating for a long time that can suppress, in concentration of solvent-containing substance using forward osmosis, migration of an osmosis substance in an osmosis substance flow into a supply flow via a forward osmosis membrane and can recover a concentrate of high purity.SOLUTION: A concentration system of a solvent-containing substance having a first step characterized in that a supply flow a comprising a solvent-containing substance containing solute and solvent b is counter current flowed or parallel flowed through the osmosis substance flow d and the forward osmosis membrane o, and the solvent b contained in the supply flow a is transferred to the forward osmosis substance flow d through the forward osmosis membrane o, to obtain a concentrated substance flow c made of a concentrated solvent-containing substance, and a flow e made of the diluted osmosis substance flow d, the osmosis substance flow d is an inorganic salt solution containing polyvalent cation, and the temperature of the osmosis substance flow d in the first step is 5 to 60°C.SELECTED DRAWING: Figure 1

FUJITA MITSURU
KIGUCHI AKIRA
MIKAWA MASATO
SUZUKI TAKASHI

JP2021121922A

November 04, 2021

July 26, 2021

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ASAHI KASEI CORP

A23F3/22; B01D61/00; B01D61/36; B01D61/58; B01D71/32

JP2016026492A	2016-02-18
JP2005040030A	2005-02-17

CN103073146A

2013-05-01

JOURNAL OF MEMBRANE SCIENCE, vol. 300, JPN6022031608, 2007, pages 6 - 12, ISSN: 0004983606
膜, vol. 37(5), JPN6022031609, 2012, pages 224 - 229, ISSN: 0004983607

Atsushi Aoki
Shinji Mitsuhashi
Kazuhiro Nakamura
Toko Saito
Shunsuke Mima
Hideo Katsumata

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