Process for the manufacture of ethanol from ethylene

Details Process for the manufacture of ethanol from ethylene Process for the manufacture of ethanol from ethylene

1980-06-09

1981-10-20

Evans, Joseph E.

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

Organic compounds

Oxygen containing

568888, 568889, C07C 2912

Patent

active

042962617

ABSTRACT:
A process for the manufacture of C.sub.2 -C.sub.5 alcohols from C.sub.2 -C.sub.5 olefins by the indirect hydration method is disclosed. The process comprises the steps of (a) treating a C.sub.2 -C.sub.5 olefin in an absorption zone in admixture with a C.sub.2 -C.sub.5 alkyl hydrogen sulfate at conditions to form a C.sub.2 -C.sub.5 dialkyl sulfate; (b) treating said dialkyl sulfate in a hydrolyzing zone in admixture with a measured amount of water at conditions effecting the partial hydrolysis of said dialkyl sulfate and the formation of a C.sub.2 -C.sub.5 alkyl hydrogen sulfate and a C.sub.2 -C.sub.5 alcohol; (c) separating the alcohol; and (d) recycling the alkyl hydrogen sulfate to said absorption zone, and treating said C.sub.2 -C.sub.5 olefin in admixture therewith in accordance with step (a). The practice of this invention substantially obviates the formation of sulfuric acid and the required reconcentration thereof.

REFERENCES:
patent: 2045616 (1936-06-01), Sargent
patent: 2081166 (1937-05-01), Brooks
patent: 2474568 (1949-06-01), Bannon et al.
Horie et al., "Hydrocarbon Processing", vol. 49, Mar. 1970, pp. 119, 120.
Schrage et al., "J. Ind. & Eng. Chem.", vol. 42, 1950, pp. 2550-2553.

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