Porous polymeric separation material

Abstract

The present invention relates to a mesoporous polymeric separation material comprising one or more functional groups bound to metal ions from Cu, Zn, Ag, or Pd. Methods of producing the material, as well as methods for its preparation, and use of said material in separation of pesticides from food or feed products is disclosed.

1 . A porous polymeric separation material characterized by
 containing pores in the mesoporous region;   having a total surface area >50 m 2 g material and a pore volume between 0.2 and   1.2 ml/g material, as determined by BET analysis and the material comprises one or more functional group(s) bound to one or more metal ion(s) selected from the group consisting of Cu + , Ag + , Pd 2+ , Cu 2+  or Zn 2+ .   
     
     
         2 . The porous polymeric separation material according to  claim 1 , wherein the metal ion is selected from the group consisting of Ag +  or Pd 2+ . 
     
     
         3 . The porous polymeric separation material according to  claim 1 , wherein the pores in the mesoporous region have a pore surface area >50 m 2 g material determined by BET analysis. 
     
     
         4 . The porous polymeric separation material according to  claim 1 , wherein said one or more functional group(s) are selected from the group consisting of sulphonic acid, carboxylic acid and tertiary alkylamine. 
     
     
         5 . The porous polymeric separation material according to  claim 1 , wherein the material has a capacity between 0.2 and 1.0 mmol/g material. 
     
     
         6 . The porous polymeric separation material according to  claim 1 , wherein the porous polymeric separation material is a copolymer of divinylbenzene and styrene substituted with one or more functional group(s) selected from the group consisting of sulphonic acid and carboxylic acid; or a copolymer of divinylbenzene and a polymerisable tertiary alkylamine. 
     
     
         7 . The porous polymeric separation material according to  claim 1 , wherein said one or more functional group(s) is sulphonic acid. 
     
     
         8 . A method of preparing a porous polymeric separation material according to  claim 1  by
 providing a functional monomer, a cross-linking monomer, optionally an initiator, and a porogen; 
 polymerizing; 
 obtaining a porous polymeric material; 
 contacting said porous polymeric material with one or more metal ion(s) selected from the group consisting of Cu +, Ag   +, Pd   2+, Cu   2+or Zn   2+; and    
 obtaining a porous polymeric separation material. 
 
     
     
         9 . The method according to  claim 8 , wherein
 a. the functional monomer is selected from the group consisting of vinylbenzenesulphonic acid, such as 4-vinylbenzenesulphonic acid; vinylbenzyliminodiacetic acid, such as 4-vinylbenzyliminodiacetic acid; polymierzable derivatives of tertiary alkylamines; or a combination or salts thereof; and/or   b. the cross-linking monomer is selected from divinylbenzene, ethylene glycol dimethacrylate, trimethylolpropane trimethacrylate or any combination thereof.   
     
     
         10 . The method according to  claim 9 , wherein the functional monomer is an ammonium salt of vinylbenzenesulphonic acid or an ammonium salt of vinylbenzyliminodiacetic acid. 
     
     
         11 . The method according to  claim 10 , wherein the ammonium salt is tributyl ammonium salt or tetrabutyl ammonium salt. 
     
     
         12 . A method of separating a pesticide from a food or feed product by contacting the food or feed product with a porous polymeric separation material according to  claim 1 . 
     
     
         13 . The method of  claim 12  further comprising
 forming a ternary complex between the porous polymeric separation material and the pesticide; 
 collecting the purified food or feed product; and 
 eluting said pesticide. 
 
     
     
         14 . The method according to  claim 12 , wherein said pesticide is selected from organophosphate pesticides, organothiophosphate pesticides, or pesticides containing aryl groups containing heteroatoms selected from nitrogen and sulphur, or any combination thereof. 
     
     
         15 . The method according to  claim 12 , wherein said product is an essential oil or a combination of essential oils. 
     
     
         16 . The method according to  claim 15 , wherein said essential oils are made from citrus, sweet orange, lemon, lime, bergamot, mandarin and tangerine and grapefruit, or any combination thereof. 
     
     
         17 . A food or feed product essentially free from pesticides obtained by bringing a food or feed product comprising one or more pesticide(s) in contact with a porous polymeric separation material according to  claim 1 .