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Porous fiber, absorbing material, and purifying column

An adsorption material and porous technology, applied in the field of purification columns, can solve the problems of reduced spinning stability and achieve the effect of efficient adsorption

Active Publication Date: 2018-12-21
TORAY IND INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the degree of irregularity of the fiber increases, the stability of spinning decreases. For this reason, it has been considered to suppress the increase in the degree of irregularity.

Method used

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  • Porous fiber, absorbing material, and purifying column
  • Porous fiber, absorbing material, and purifying column
  • Porous fiber, absorbing material, and purifying column

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0180] [Production of porous fibers]

[0181] With mass average molecular weight being 400,000 syndiotactic PMMA (hereinafter referred to as syn-PMMA) 31.7 mass parts, mass average molecular weight being 1,400,000 syn-PMMA31.7 mass parts, mass average molecular weight being 500,000 isotactic Construct PMMA (hereinafter referred to as iso-PMMA) 16.7 mass parts, the molecular weight that comprises 1.5mol% p-styrene sulfonate sodium is the PMMA copolymer 20 mass parts of 300,000 mass parts and dimethyl sulfoxide 376 mass parts mix, at 110 ℃ After stirring for 8 hours, a spinning dope was prepared. The obtained spinning dope had a viscosity of 1,880 poise at 92°C. The spinning dope that obtains is with the speed of 1.1g / min from the nozzle that is kept at 92 ℃ (for Figure 6 The shape shown and the size shown in Table 1) were discharged into the air, and after traveling 380 mm in the air, they were introduced into a coagulation bath and passed through the bath to obtain solid fi...

Embodiment 2

[0184] In addition to using as Figure 7 Fibers were produced under the same conditions as in Example 1, except for the nozzles having the shapes shown and discharge ports having the dimensions shown in Table 1. The results are shown in Tables 1 and 2.

Embodiment 3

[0186] In addition to using as Figure 8 Fibers were produced under the same conditions as in Example 1, except for the nozzles having the shapes shown and discharge ports having the dimensions shown in Table 1. The results are shown in Tables 1 and 2.

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Abstract

The present invention provides a porous fiber that is a solid fiber having a modified cross-sectional shape and that satisfies the following (a) and (b): (a) when, in a transverse cross section of thesolid fiber, the diameter of an inscribed circle is Di and the diameter of a circumscribed circle is Do, a modified cross section degree Do / Di is 1.20-8.50; and (b) the specific surface area of the fiber pore is not less than 30 m2 / g. Also provided is an absorbing material that contains not less than 28 vol% of the porous fiber as a fiber bundle. Also provided is a purifying column formed from: the absorbing material being arranged in a case axial direction and in a straight shape; and a plastic casing having both ends at which an inlet port and an outlet port for a liquid to be treated are provided. The present invention thus provides: the porous fiber that allows efficient absorption of a substance to be removed in the liquid to be treated; and the purifying column having the porous fiber embedded.

Description

technical field [0001] The present invention relates to porous fibers. In particular, it relates to a porous fiber capable of efficiently adsorbing a substance to be removed in a liquid to be treated, an adsorbent using the porous fiber in a bundle, and a purification column incorporating the fiber. Background technique [0002] Conventionally, porous beads have been often used as the form of an adsorbent used in a purification column for removing a substance to be removed in a treated liquid by adsorption. The reason for this is that since the bead-shaped adsorption carrier can be uniformly filled in the adsorption column, there is little deviation in blood flow and the advantage of easy column design. On the other hand, as means for improving the adsorption performance, increasing the surface area per unit volume of the adsorption carrier can be mentioned. However, when the adsorption carrier is in the form of beads, if the bead diameter is reduced in order to increase t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F6/00A61M1/36B01D15/00B01J20/26B01J20/28D01D5/253
CPCB01D15/00D01D5/253B01J20/261B01J20/28028B01J20/28052B01J20/28059B01J20/2808B01J20/28083B01J20/28085B01J20/3007D01D5/247D01F6/16D01F6/52B01J20/264B01J20/28023B01J20/3092A61M1/3679A61M1/3646B01J20/28011B01J20/28057B01J20/28078B01J20/262B01J2220/58A61M1/1623A61M1/0259A61M1/36D01F6/00A61M1/1621B01J20/26B01J20/28B01J20/285B01D15/206A61M2202/0427A61M2202/0439B01J2220/82D10B2505/04D10B2509/00
Inventor 藤枝洋晓上野良之田中和实
Owner TORAY IND INC