Chemistry of carbon compounds – Miscellaneous organic carbon compounds – C-metal
Patent
1975-04-11
1976-05-25
Mars, Howard T.
Chemistry of carbon compounds
Miscellaneous organic carbon compounds
C-metal
260615R, C07C 4100
Patent
active
039593916
ABSTRACT:
A method of increasing the yield of diethers from polyethylene glycols utilizing sodium hydroxide and an alkyl halide as condensing reactants. A normal yield of 70-75% of the diether at the end point of the reaction may be increased to 95-99% by separating out the sodium chloride product and then adding in a supplemental reaction lesser incremental amounts of from 20-25% each (based upon theoretical) of sodium hydroxide and alkyl halide reactants together with elimination of water of reaction by a condensation trap or binary azeotropic distillation. The organic phase of the azeotropic pair is selected preferably from organics of the BTX series such as toluene, which reagents are free from functional groups which would interfere later with the use of the diether product as a Grignard reagent solvent in the Nalco Freeport Process for the production of organolead additives using a sacrificial lead anode. [Encyclopedia of Chemical Technology (ECT) II, Volume 12, Interscience, 1967, pages 292-293].
REFERENCES:
patent: 2271873 (1942-02-01), Perkins et al.
patent: 2520611 (1950-08-01), Roberts et al.
patent: 2520733 (1950-08-01), Morris et al.
patent: 2575298 (1951-11-01), Ryznar
patent: 2596091 (1952-03-01), Benneville
patent: 2919293 (1959-12-01), Weisse
Mars Howard T.
Nalco Chemical Company
Premo John G.
Roberts John S.
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