Separation membrane and separation membrane element

Patent metadata

Field	Value
Publication number	US-2015321148-A1
Application number	US-201314410899-A
Country	US
Kind code	A1
Filing date	Jun 28, 2013
Priority date	Jun 28, 2012
Publication date	Nov 12, 2015
Grant date	—

Abstract

A separation membrane including: a separation membrane main body having a feed-side face and a permeate-side face; and a plurality of channel members adhered to the permeate-side face of the separation membrane main body, in which a weight W (g) of the plurality of channel members and a volume V (cm 3 ) of the plurality of channel members, exclusive of portions impregnated into the permeate-side face, satisfy the following relational expression: 1.0≦W/V≦2.5, and the channel members have a melting temperature of 200° C. or lower as measured with a differential scanning calorimeter.

First claim

1 . A separation membrane comprising: a separation membrane main body having a feed-side face and a permeate-side face; and a plurality of channel members adhered to the permeate-side face of the separation membrane main body,
wherein a weight W (g) of the plurality of channel members and a volume V (cm 3 ) of the plurality of channel members, exclusive of portions impregnated into the permeate-side face, satisfy the following relational expression:
1.0≦ W/V≦ 2.5,

and the channel members have a melting temperature of 200° C. or lower as measured with a differential scanning calorimeter.

2 . The separation membrane according to claim 1 , wherein a ratio of a thickness of the channel member to a width of the channel member in a first direction parallel to the permeate-side face is from 0.2 to 1.

3 . The separation membrane according to claim 1 , wherein the channel members are separately provided from one another so that the width of each channel member becomes wider than a spacing between the channel members adjacent to each other in the first direction parallel to the permeate-side face.

4 . The separation membrane according to claim 2 , wherein a ratio of the spacing between the adjacent channel members to the width of each channel member in the first direction is from 0.3 to 1.3.

5 . The separation membrane according to claim 1 , wherein a maximum value of differences in thicknesses of all the channel members provided on the separation membrane is 0.25 mm or smaller.

6 . The separation membrane according to claim 1 , wherein the separation membrane main body comprises a substrate, a porous supporting layer provided on the substrate and a separation functional layer provided on the porous supporting layer, and the substrate is a long-fiber nonwoven fabric.

7 . A separation membrane element comprising the separation membrane according to claim 1 .

Assignees

• Toray Industries

Inventors

• Hirozawa Hiroho
• Koiwa Masakazu
• Yamada Hiroyuki
• Takagi Kentaro
• Okamoto Yoshiki
• Hamada Tsuyoshi
• Oto Katsufumi
• Kimura Masahiro

Classifications

• B01D2313/08

  Flow guidance means within the module or the apparatus · CPC title

• B01D63/103 Primary

  Details relating to membrane envelopes · CPC title

• B01D2313/146

  on the permeate side · CPC title

• B01D69/1071

  Woven, non-woven or net mesh · CPC title

• B01D63/107 Primary

  Specific properties of the central tube or the permeate channel · CPC title