Use of a granulate for the removal of liquid, gaseous and/or dissolved constituents from a process stream
View Patent ↗The invention pertains to the use of a granulate for the removal of liquid, gaseous and/or dissolved organic constituents from a process stream, said granulate consisting of dimensionally stable, porous synthetic particles with an extracting agent having a boiling point higher than 350° C. at 1 bar immobilized therein, characterized in that the granulate is obtainable by suspension polymerization of a monovinyl compound in the presence of a polyvinyl compound, with at least 50% wt. % of the monomer units having an aromatic structure and with the solvent for the monomers acting both as a non-solvent for the copolymer and as an extracting agent.
1. A process for the removal of liquid, gaseous and/or dissolved organic constituents from a process stream, comprising the use of a granulate comprising dimensionally stable, cross-linked, porous synthetic particles with an extracting agent having a boiling point higher than 350° C. at 1 bar immobilized therein.
2. The process according to claim 1 wherein the process stream is an aqueous process stream.
3. The process according to claim 1 wherein the extracting agent is regenerable.
4. The process according to claim 1 wherein the acid number of the extracting agent shows a change of less than 0.9 mmoles/kg/week according to the modified beverage bottle method ASTM D 2619-95.
5. The process according to claim 1 or 2 wherein the granulate is obtained by suspension polymerization of a monovinyl compound in the presence of a polyvinyl compound, with at least 50 wt. % of the monomer units having an aromatic structure.
6. The process of claim 1 or 2 wherein a solvent for the monomers is used in the suspension polymerization which acts both as a non-solvent for the resulting copolymer and as an extracting agent.
7. The process of claim 5 wherein 10 to 80 wt. % of the monomer is made up of one or more monovinyl compounds and 90 to 20 wt. % is made up of polyvinyl compounds.
8. The process according to claim 5 wherein the polymerization is carried out in the presence of a stabilizer.
9. The process according to claim 8 wherein the stabilizer is polyvinyl pyrrolidone.
10. The process according to claim 6 wherein the organic solvent is diisodecyl phthalate.