Process for preparing ethers

Details Process for preparing ethers Process for preparing ethers

1984-12-07

1988-04-26

Mars, Howard T.

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

Organic compounds

Oxygen containing

568699, C07C 4106, C07C 4134

Patent

active

047406313

ABSTRACT:
In the process for preparing methyl tert.-alkyl ether comprising the steps of (a) contacting and reacting in the liquid phase a reaction mixture formed by combining a stream consisting essentially of C.sub.4 -C.sub.5 hydrocarbons and containing at least some proportion of isoalkylene and a stoichiometric excess of methanol, with respect to the isoalkylene, to form a reaction product comprising methyl tert.-alkyl ether, unreacted methanol and unreacted C.sub.4 -C.sub.5 hydrocarbons; (b) isolating the methyl tert.-alkyl ether from the reaction product; and (c) recovering the unreacted methanol from the residual portion of the reaction product; the improvement which comprises selectively adsorbing the methanol constituent of said residual reaction product in a bed of crystalline molecular sieve adsorbent and recovering same by desorption using as a purge-desorption stream, the C.sub.4 -C.sub.5 hydrocarbon stream used to prepare the initial reaction mixture.

REFERENCES:
patent: 3726942 (1973-04-01), Louder
patent: 4371718 (1983-02-01), Hutson
patent: 4447653 (1984-05-01), Vora
patent: 4490563 (1984-12-01), Pool et al.
patent: 4504688 (1985-03-01), Herwig et al.

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