GB652830A - Improvements in and relating to insoluble poly-quaternary resins - Google Patents

Abstract

Insoluble polyquaternary resins having ion-exchange properties are made by reacting substituted hydrocarbon compounds, the molecules of one containing at least two halide groups with the halogen atoms not closer together than the 1 : 4 position, and those of the other containing at least two tertiary amino groups, there being on the average more than two such functional groups per molecule. The reaction may also be a polymerization of the molecules of a single compound containing both functional groups in the proportions and position specified. The resins are salts which on treatment with an alkali such as caustic soda give the hydroxide which may be used for the absorption or removal of acids or acid vapours. In examples: (1) tri - (dimethylamino -ethyl) - amine is reacted with pentamethylene dibromide; (2) hexa (N-methyl) triethylene tetramine is reacted with tetramethylene dibromide; (3) an aqueous solution of the polyamine of (2) is emulsified with tetramethylene dibromide and heated; (4) the product of (3) is washed with caustic soda; (5) tris-b -bromoethyl-methane is reacted with hexa - (N - methyl) - triethylene tetramine; (6) tetrakis-bromoethyl-ethane is reacted with N,N,N1,N1 - tetramethyl - hexamethylene diamine; (7) para-xylylene dibromide is emulsified with an aqueous solution of hexa - (N-methyl)-triethylene-tetramine and heated; (8) N,N1 - tetramethyl - 4 - hydroxy - 4 - tetrahydropyranyl - heptamethylene - diamine is heated with excess anhydrous HBr to replace the 4-hydroxy group by Br and to displace the oxygen atom from, and break, the pyrane ring and substitute a bromine atom at each of the carbon atoms previously directly bonded to the oxygen atom, the resulting compound being made alkaline, extracted and polymerized by heating.ALSO:In example VIII, a bromine-containing tertiary amine which may be polymerized to give a polyquaternary resin (see Group IV (a)), is made by heating N,N1 - tetramethyl - 4 - hydroxy - 4 - tetrahydropyranyl - heptamethylene-diamine with excess anhydrous HBr to replace the 4-hydroxy group by Br and to displace the oxygen atom from, and break, the pyrane ring and substitute a bromine atom at each of the carbon atoms previously directly bonded to the oxygen atom.