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Molecular Biology

Production-of-absorbents

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Production of absorbents

Details

Inventors: Kroebel, Reinhard; Meyer, Alfred;
Assignee: Bayer Aktiengesellschaft (DT)
Primary Examiner: Garvin; Patrick P.
Assistant Examiner:
Attorney, Agent or Firm: Connolly and Hutz

Process of adding an extractant, an extractant mixture or a solution of an extractant in a solution promoter to a mixture of a monomeric monovinyl compound and a polyvinyl compound and polymerizing the resulting mixture in the presence of a free radical catalyst, the extractant, the extractant mixture and the solution of the extractant in the solution promoter being a solvent for the monomers but not for the polymer resulting therefrom and resultant absorbent useful as the stationary phase in extraction chromatography.

DETAILED DESCRIPTION We claim: 1.
A process for the production of an absorbent based on a synthetic resin which comprises (1) adding an extractant, a mixture of extractants or a solution of an extractant in a solution promoter to a mixture comprising a monomeric monovinyl compound and a monomeric polyvinyl compound, (2) polymerizing the resulting mixture in the presence of a free radical catalyst; the extractant, the mixture of extractants and the solution of the extractant in the solution promoter being solvents for the monomeric monovinyl or polyvinyl compound but not for the resulting polymer, and (3) recovering a copolymer in which the extractant or extractant mixture is included in the polymer, said extractant, mixture of extractants or the solution of the extractant in the solution promoter being used in a quantity of from 10 to 90% by weight, based on the total quantity of absorbent and said polyvinyl compound being employed in a quantity of from 5 to 70% by weight, based on the total quantity of monomers.
2.
The process as claimed in claim 1 wherein the monovinyl compound is styrene and the polyvinyl compound is divinyl benzene.
3.
The process as claimed in claim 1 wherein the extractant is an ester.
4.
The process as claimed in claim 3 wherein the ester is a phosphorus acid ester.
5.
The process as claimed in claim 1 wherein the extractant is a primary, secondary or tertiary amine.
6.
The process as claimed in claim 1 wherein the extractant is a sulphide.
7.
The process as claimed in claim 1 wherein the extractant is a sulphoxide.
8.
The process as claimed in claim 1 wherein the extractant is a phosphinoxide.
9.
The process as claimed in claim 1 wherein the extractant is a phosphonate.
10.
The process as claimed in claim 1 wherein the extractant is a diphosphonate.
11.
The process as claimed in claim 1 wherein the extractant is a phosphinate.
12.
The process as claimed in claim 1 wherein the extractant is a sulphonium salt.
13.
The process as claimed in claim 1 wherein the extractant is a ketone

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