Copolymer, process for its preparation and its use as a sorbent

US4576973A · kind A · utility

Assignee

• Cassella Aktiengesellschaft · DE

Inventors

• Karl-Heinz Keil · Hanau, DE
• Fritz Engelhardt · Frankfurt am Main, DE
• Ulrich Greiner · Schöneck, DE
• Klaus Kuhlein · Kelkheim, DE
• Reinhold Keller · Bad Soden am Taunus, DE
• Merten Schlingmann · Königstein, DE
• Gerhard Hess · Hofheim, DE

Key dates

• Filing date: Jun 22, 1984
• Grant date: Mar 18, 1986
• Expiry date: Jun 22, 2004

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B01J20/26
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The crosslinked, porous copolymer in the form of beads and containing 50 to 99.9% by weight of recurring units of a heterocyclic 5-membered ring compound which contains a polymerizable olefinic group and which has at least one protonizable nitrogen atom in the ring, 0.1 to 50% by weight of units of a crosslinking agent, 0 to 25% by weight of units of a polymerizable organoboron or organosilicon compound and, relative to 100% by weight of the sum of the abovementioned units, 5 to 350% by weight of units of an N-vinylamide of the general formula I CH.sub.2 .dbd.CH--N(R.sup.1)--C(R.sup.2).dbd.O wherein R.sup.1 denotes hydrogen, methyl or ethyl and R.sup.2 denotes hydrogen or C.sub.1 -C.sub.3 -alkyl, or several such N-vinylamides and 0 to 40% by weight of units of another polymerizable compound or several such compounds, is prepared by inverted suspension polymerization and is used, for example, as a sorbent for acid substances from solutions thereof, preferably aqueous solutions.