Sequential reaction of TBA and isobutylene with methanol

Details Sequential reaction of TBA and isobutylene with methanol Sequential reaction of TBA and isobutylene with methanol

1994-11-28

1996-10-08

Killos, Paul J.

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

Organic compounds

Oxygen containing

568671, C07C 4100

Patent

active

055633013

ABSTRACT:
Methyl tertiary butyl ether is sequentially prepared from tertiary butyl alcohol and methanol by:
passing tertiary butyl alcohol and methanol through a primary reaction zone to form a primary etherification reaction product comprising unreacted methanol, unreacted tertiary butyl alcohol, water, dimethyl ether, isobutylene and methyl tertiary butyl ether;
separating the primary etherification reaction product into a methanol recycle fraction, a tertiary butyl alcohol recycle fraction, an isobutylene fraction and a methyl tertiary butyl ether product fraction;
recycling the methanol recycle fraction and the tertiary butyl alcohol recycle fraction to the methyl tertiary butyl ether etherification reaction zone;
passing at least a portion of said isobutylene fraction together with added methanol through a secondary reaction zone to form a secondary etherification reaction product comprising water, methanol, isobutylene, DME, methyl tertiary butyl ether and tertiary butyl alcohol; and
recovering the methyl tertiary butyl ether from said secondary etherification reaction product.

REFERENCES:
patent: 5243091 (1993-09-01), Kruse
patent: 5292964 (1994-03-01), Gupta
patent: 5354912 (1994-10-01), Hwan
patent: 5386065 (1995-01-01), Kruse
patent: 5387721 (1995-02-01), Kruse
patent: 5387722 (1995-02-01), Knifton
patent: 5387723 (1995-02-01), Knifton
patent: 5395982 (1995-03-01), Cassata

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