Removal of group VIII metal catalyst from polymer cements by ext

Details Removal of group VIII metal catalyst from polymer cements by ext Removal of group VIII metal catalyst from polymer cements by ext

1990-04-16

1991-12-17

Schofer, Joseph L.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Treating polymer containing material or treating a solid...

528486, 528490, 528491, 528499, C08F 608

Patent

active

050736213

ABSTRACT:
A process is provided for removing Group VIII metal hydrogenation catalyst residue from a polymer which comprises oxidizing the hydrogenation catalyst residue in the polymer, contacting the polymer with an aqueous solution of dicarboxylic acid and separating the hydrogenation catalyst residue from the polymer. Preferred dicarboxylic acids include adipic and azelaic acids. The amount of water contacted with the polymer cement is less than that which would form an aqueous phase. Solid particulates comprising hydrogenation catalyst metal form within minutes upon the addition of the aqueous dicarboxylic acid to the polymer cement.

REFERENCES:
patent: 2893982 (1959-07-01), Campbell
patent: 4595749 (1986-06-01), Hoxmeier

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