Integrated process for producing tert.butyl alkyl ethers and but

Organic compounds -- part of the class 532-570 series – Organic compounds – Oxygen containing

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203 43, 203 44, 203 45, 203 46, 203 57, 585315, 585332, C07C 4106

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045131538

ABSTRACT:
Tert.butyl alkyl ethers are produced from a C.sub.4 hydrocarbon feedstock containing isobutene, and the butene-1 is recovered at high purity by extractive distillation of the isobutene-free C.sub.4 hydrocarbon stream in the presence of a solvent chosen from acetone, acetonitrile, dimethylformamide, methanol, n-methylpyrrolidone, formylmorpholine and furfural.
After removing the solvent, the extract is rectified, and the butene-1 separates as overhead product of high purity.

REFERENCES:
patent: 4287379 (1981-09-01), Brunner et al.
patent: 4320232 (1982-03-01), Volkamer et al.
Muddarris et al., Hydrocarbon Processing, Oct. 1980, 91-95.
Scheeline et al., Process Economic Reviews, Dec. 1978, pp. 1-4, 7-17, FIG. 3.1.
Choudhary, Chemical Industry Developments, 1974, pp. 32-41.

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