Feedstock dewatering and etherification of crude ethanol

Details Feedstock dewatering and etherification of crude ethanol Feedstock dewatering and etherification of crude ethanol

1990-03-28

1992-09-01

Mars, Howard T.

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

Organic compounds

Oxygen containing

C07C 4106

Patent

active

051440857

ABSTRACT:
Improved process techniques and equipment for reacting crude aqueous ethanol feedstock with iso-olefinic hydrocarbons to produce C.sub.6.sup.+ ethyl t-alkyl ethers, which comprises: distilling the aqueous ethanol feedstock; contacting ethanol rich distillate overhead containing a minor amount of water with a liquid hydrocarbon extractant rich in C.sub.4.sup.+ isoalkene under liquid extraction conditions; recovering an aqueous phase containing water introduced from the overhead; recovering an organic extract phase comprising the hydrocarbon extractant and a major amount of ethanol introduced in the feedstock; and reacting the extracted ethanol and C.sub.4.sup.+ isoalkene in contact with an acid etherification catalyst under catalytic reaction conditions to produce ether product.

REFERENCES:
patent: 4334890 (1982-06-01), Kochar et al.
patent: 4409406 (1983-10-01), Feldman
patent: 4665237 (1987-05-01), Arakawa et al.
patent: 4814519 (1989-03-01), Harandi et al.
patent: 4827045 (1989-05-01), Harandi et al.
patent: 4831195 (1989-05-01), Harandi et al.

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