Process for the preparation of aluminum oxide carboxylate polyme

Details Process for the preparation of aluminum oxide carboxylate polyme Process for the preparation of aluminum oxide carboxylate polyme

1990-05-03

1991-12-24

Dees, Jose G.

Organic compounds -- part of the class 532-570 series

Organic compounds

Aluminum containing

C07F 506

Patent

active

050754734

ABSTRACT:
The invention relates to a novel process for the preparation of aluminum oxide carboxylate polymers containing at most 2% by weight of ester by reacting an aluminum alkoxide of the general formula Al(OR).sub.3, wherein R stands for a C.sub.2-5 alkyl group, dissolved in an aromatic or aliphatic hydrocarbon with a solution of a C.sub.8-22 aliphatic or alicyclic monocarboxylic acid or carboxylic acid mixture and water in a C.sub.2-5 alkanol and removing the alkanol(s).
The process according to the invention comprises introducing the solution of the aluminum alkoxide to a tube reactor having a 10 to 200 length/diameter ratio at a temperature exceeding by 15.degree.to 50.degree.C. the boiling point of the higher boiling alkanol among that corresponding to the alkanol component of aluminum alkoxide and that used as solvent; then feeding in the alkanolic solution containing the monocarboxylic acid and water, wherein the aluminum/monocarboxylic acid mole ratio is at least 10:1 and the aluminum/water mole ratio is at least 10:1; removing the alkanol formed in the reaction; returning the reaction mixture into the tube reactor; repeating this operation until the mono-carboxylic acid/aluminum mole ratio reaches 0.95 to 1.05 and the water/aluminum mole ratio reaches 0.9 to 1.0; and then making the product obtained free from alkanol.

REFERENCES:
patent: 2744074 (1956-05-01), Theobald
patent: 2925430 (1960-02-01), Stedehouder et al.
patent: 2979497 (1961-04-01), Jacobus Rinse
patent: 3054816 (1962-09-01), Jacobus Rinse
patent: 4069236 (1978-01-01), Hutchinson et al.

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