Process for removing polymer from reaction mixture

Details Process for removing polymer from reaction mixture Process for removing polymer from reaction mixture

1975-09-15

1977-08-16

Woodberry, Edward M.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

260 13, 260 47P, 260 49, C08L 8900

Patent

active

040425428

ABSTRACT:
The recovery of a polymer product formed by condensing an organo-phosphonic acid dichloride or dibromide, a dihydroxy aromatic compound and, optionally, a crosslinking momomer in an organic solvent reaction medium, as a granular solid is accomplished by combining said organic solvent containing the polymer product and an aqueous solution which contains an effective amount of suspending agent to later induce precipitation of said polymer product and by thereafter agitating the solution while removing the solvent therefrom to affect precipitation of said granular polymer product.

REFERENCES:
patent: 2572076 (1951-10-01), Toy
patent: 2636876 (1953-04-01), Zenftman et al.
patent: 2716100 (1955-08-01), Coover et al.
patent: 3058971 (1962-10-01), Miller et al.
patent: 3541062 (1970-11-01), Dierendonck
patent: 3828012 (1974-08-01), Arndt et al.
patent: 3830883 (1974-08-01), Sturt

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