Claims
- 1. A collector having an amidoxime group and a hydrophilic group for removing dissolved metals from seawater which is produced by the steps of,exposing a substrate fiber in the form of either a nonwoven or a woven cloth to radiation to generate a reaction initiating radical on the fiber, wherein the nonwoven or woven cloth is made of a fiber of a core/sheath structure that has a polyolefinic fiber coated with a different polyolefin, co-grafting a polymerizable monomer having a cyano group onto the radiated polyolefin fiber in the presence of a polymerizable monomer having a hydrophilic group, and reacting the cyano groups in the graft side chains with hydroxylamine to convert them to amidoxime groups, whereby both amidoxime and hydrophilic groups are introduced into the same graft side chains and wherein the amidoxime group and hydrophilic groups are introduced at a molar ratio of 70:30-30:70.
- 2. The collector of claim 1 wherein the polymerizable monomer having a cyano group is selected from the group consisting of acrylonitrile, vinylidene cyanide, crotonnitrile, chloroacrylonitrile, 2-cyanomethyl acrylate, 2-cyanoethyl acrylate, and mixtures thereof.
- 3. The collector of claim 1 wherein the polymerizable monomer having a hydrophilic group is selected from the group consisting of 2-hydroxyethyl methacrylate, allyl alcohol, polyethylene glycol acrylate, polyethylene glycol methacrylate, polyethylene glycol diacrylate, polyethylene glycol dimethacrylate, N-vinylpyrrolidone, acrylamide, and mixtures thereof.
Priority Claims (2)
Number |
Date |
Country |
Kind |
10-354194 |
Dec 1998 |
JP |
|
10-354197 |
Dec 1998 |
JP |
|
Parent Case Info
This application claims the benefit under 35 U.S.C. §120 of prior filed U.S. application Ser. No. 09/983,507, filed Oct. 24, 2001, which is a continuation of U.S. application Ser. No 09/460,511, filed Dec. 14, 1999, now U.S. Pat. No. 6,333,078 (Dec. 25, 2001), which claims priority of Japanese Application No. 354194 filed Dec. 14, 1998 and Japanese Application No. 354197 filed Dec. 14, 1998.
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Continuations (2)
|
Number |
Date |
Country |
Parent |
09/983507 |
Oct 2001 |
US |
Child |
10/266642 |
|
US |
Parent |
09/460511 |
Dec 1999 |
US |
Child |
09/983507 |
|
US |