Title:
SEPARATION MEMBRANE ELEMENT PRODUCTION METHOD AND SEPARATION MEMBRANE ELEMENT
Document Type and Number:
WIPO Patent Application WO/2022/080366
Kind Code:
A1
Abstract:
In this separation membrane element, at least a portion of a laminate is wound around a hollow tube. The laminate is obtained by stacking a plurality of separation membrane units each comprising: a leaf having a first channel member interposed between two folds of a separation membrane; and at least a portion of layers of a second channel member that is to be stacked on the leaf. The respective separation membrane units are stacked on one another such that the positions of the folding portions of the respective separation membranes are not in alignment in the winding direction of the laminate. A production method for this separation membrane element comprises a step for stacking separation membrane units. The stacking step further comprises a first step for stacking a N-th tier separation membrane unit on a (N-1)-th tier separation membrane unit while a first region that includes at least a portion of the folding line of the separation membrane in the (N-1)-th tier separation membrane unit is being pressed.
Inventors:
KITANO MASANORI (JP)
IKESHITA KAZUKI (JP)
IKESHITA KAZUKI (JP)
Application Number:
PCT/JP2021/037730
Publication Date:
April 21, 2022
Filing Date:
October 12, 2021
Export Citation:
Assignee:
SUMITOMO CHEMICAL CO (JP)
International Classes:
B01D63/00; B01D63/10; B01D69/00
Foreign References:
| JP2020131072A | 2020-08-31 | |||
| JP2004202382A | 2004-07-22 | |||
| JPH10137558A | 1998-05-26 | |||
| JP2002102659A | 2002-04-09 | |||
| JP2002143653A | 2002-05-21 |
Attorney, Agent or Firm:
FUKAMI PATENT OFFICE, P.C. (JP)
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