Detail of "25085-21-6"
- CAS Number:
- 25085-21-6
- Name:
Hexanedioic acid,polymers,polymer with N,N'-bis(2-aminoethyl)-1,2-ethanediamine
Hexanedioic acid,polymers,polymer with N,N'-bis(2-aminoethyl)-1,2-ethanediamine
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Reference
- Polymer absorbents for heavy metals
- Polymer absorbents for heavy metals. Sato, Kiyoshi; Sato, Kyoshi (Arakawa Chemical Industries, Ltd., Japan). Jpn. Kokai Tokkyo Koho JP 03221579 A2 30 Sep 1991 Heisei, 6 pp. (Japan). CODEN: JKXXAF. CLASS: ICM: C09K003-00. ICS: C02F001-28; C02F001-62; C08G073-02. APPLICATION: JP 90-16582 26 Jan 1990. DOCUMENT TYPE: Patent CA Section: 38 (Plastics Fabrication and Uses) Section cross-reference(s): 54 The title absorbents are obtained at low cost from the reaction products of epichlorohydrin-modified polyamines and the thiourea R1HNC(S)NHR2 (R1,2 = H, C1-3 alkyl). Thus, adding diethylenetriamine 618 to a mixt. of adipic acid 876 and water 300, heating 4 h at 180°, and adding slowly water 1278 parts gave a 50%-solids polyamide-polyamine resin, 635 parts of which was then transferred to a mixt.In this article, certain chemicals are used. One of their cas registry numbers is 25085-21-6 of water 518 and epichlorohydrin 240 parts, and, after an exothermic period, maintained at 55° for 3 h, and combined with water and 70% H2SO4 to 25% solids and pH 4.0. Heating 600 parts the above product with 12 parts thiourea 2 h at 50°, and adding water 36 and 70% H2SO4 25 parts gave a resin soln. with concn. 28%, 20°-viscosity 95 cP, and pH 1.8, and was used in scavenging Cu and Hg ions with good results. .