Process for making polyoxyethylene surfactants with desirable lo

Details Process for making polyoxyethylene surfactants with desirable lo Process for making polyoxyethylene surfactants with desirable lo

1989-01-25

1991-12-03

Lovering, Richard D.

Compositions

Preservative agents

Anti-corrosion

568608, 568616, 568618, 568621, 210778, 252DIG1, B01F 1742, C07C 4103, C07C 4134

Patent

active

050698176

ABSTRACT:
A process for the production of alkyl polyoxyethylenes showing improved low-temperature behavior, by reaction of alcohols with ethylene oxide at elevated temperature in the presence of basic alkali metal compounds as catalysts and subsequent neutralization of the alkaline catalyst with acids, which under prior art practice was impractical because of clogging of reaction vessels and equipment associated with precipitation of salts during neutralization, is made practical by adding a finely divided solid to serve as a precipitation control agent during neutralization. The finely divided solids used are, in particular, organic and/or inorganic materials known in the prior art as filter aids, such as kieselguhr and sawdust or other finely divided cellulose.

REFERENCES:
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patent: 4129718 (1978-12-01), Muzzio
patent: 4306943 (1981-12-01), Mori et al.
patent: 4456773 (1984-06-01), Fock
patent: 4507475 (1985-03-01), Straehle et al.
patent: 4528364 (1985-07-01), Prier
patent: 4967017 (1990-10-01), Schmid et al.
Foust, Alan S. et al., Principles of Unit Operation, (John Wiley & Son, New York, 1980), p. 516, 665-666.

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