Distillation: processes – separatory – Distilling to separate or remove only water – From organic compound
Patent
1993-03-09
1994-03-15
Bascomb, Jr., Wilbur
Distillation: processes, separatory
Distilling to separate or remove only water
From organic compound
203 26, 203 49, 203 70, 203 78, 203 80, 203DIG13, 568916, 568918, B01D 340
Patent
active
052943046
ABSTRACT:
This invention relates to a process for the production of absolute alcohol from aqueous alcohol, whereby saving of energy to a greater extent is rendered possible in a more simple process, as compared with the prior art azeotropic distillation method using benzene or cyclohexane. That is, aqueous alcohol is subjected to extractive distillation in a first distillation column under such a condition that a liquid and gas of a solvent simultaneously coexist using low pressure propane, propylene and butane as the solvent, absolute alcohol substantially free from water is recovered from the bottom of the distillation column and subjected to stripping of hydrocarbons in a second distillation column, during which the gaseous phases of the first and second distillation columns are mixed and compressed, utilized through recompression as a heat source of a reboiler of the first distillation column, subjected to separation of water content and recycled to the upper parts of the first and second distillation columns. In accordance with the process, the energy required can largely be reduced.
In Examples, the energy required for producing 1 kg of absolute alcohol is reduced to 1/5 to 1/10 of the prior art azeotropic distillation method, which shows the advantages of the present invention.
According to the process of the present invention, installations such as compressors, heat exchangers, decanters, etc. can be omitted and the installation cost can be reduced by about 30%.
REFERENCES:
patent: 2619814 (1952-12-01), Kniel
patent: 3187066 (1965-01-01), Nathan
patent: 4303478 (1981-12-01), Field
patent: 4340446 (1982-07-01), Crawford
patent: 4428798 (1984-10-01), Zudkevitch et al.
patent: 4600477 (1986-07-01), Higashi et al.
patent: 4636284 (1987-01-01), English et al.
patent: 4718986 (1988-01-01), Comiotto et al.
patent: 4956052 (1990-09-01), Hirati et al.
patent: 5035776 (1991-07-01), Knapp et al.
Horizoe Hirotoshi
Kano Yoshikazu
Tanimoto Tetsuya
Yamamoto Itsuo
Bascomb, Jr. Wilbur
Ministry of International Trade and Industry
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