Heat integration process

Details Heat integration process Heat integration process

1988-10-28

1990-04-17

Mars, Howard T.

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

Organic compounds

Oxygen containing

203 21, C07C 4106

Patent

active

049182439

ABSTRACT:
A portion of the best of vaporization, required to separate and recover methanol from wash water used to remove methanol from a C.sub.4 raffinate resulting from the reaction of isobutene containing C.sub.4 hydrocarbons and methanol to produce MTBE is recovered by conducting the distillation of the methanol/water mixture at a pressure of 40 to 60 psig, thereby increasing the temerature of the methanol overhead to 104.degree. to 114.degree. C. and using the reaction effluent from the MTBE reactor to cool and condense the methanol overhead, said reactor effluent being correspondingly heated prior to entry into a debutanizer tower where unreacted C.sub.4 's and methanol are removed as a raffinate and MTBE product recovered. It is this raffinate that is washed with water to recover the unreacted methanol, with the methanol/water mixture being distilled as set forth above. In another embodiment a stream having a lower temperature than the methanol overhead is withdrawn from the debutanizer and used to cool the methanol overhead, then the correspondingly heated stream returned to the debutanizer.

REFERENCES:
patent: 4198530 (1980-04-01), Wentzheimer
patent: 4324924 (1982-04-01), Torck et al.

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