Distillation: processes – separatory – With disparate physical separation – Utilizing removing solid from liquid
Patent
1980-10-03
1981-12-29
Bascomb, Jr., Wilbur L.
Distillation: processes, separatory
With disparate physical separation
Utilizing removing solid from liquid
203 73, 203 92, 568753, B01D 338, C07C 3908
Patent
active
043081100
ABSTRACT:
Highly decolorized, purified hydroquinone and resorcinol can be separated from each other from a mixture containing hydroquinone and resorcinol and recovered by continuously rectifying the mixture, thereby obtaining rectification bottoms containing resorcinol and hydroquinone in a ratio by weight of resorcinol to hydroquinone of 0.1-1:1 while obtaining resorcinol as a distillate, redistilling the rectification bottoms, contacting hydroquinone vapor with water vapor, condensing the hydroquinone vapor in the presence of the water vapor, thereby recovering hydroquinone as an aqueous hydroquinone solution, and then recrystallizing the aqueous hydroquinone solution, if necessary, in the presence of an organic solvent, thereby separating hydroquinone from the aqueous solution.
REFERENCES:
patent: 1912628 (1933-06-01), Elliott
patent: 3900523 (1975-08-01), Tada et al.
patent: 3929910 (1975-12-01), Suda et al.
patent: 3968171 (1976-07-01), Burkholder et al.
patent: 4049723 (1977-09-01), Tanaka et al.
patent: 4119791 (1978-10-01), Hollingshead et al.
Hosaka Hirokazu
Morita Toshiharu
Shiota Katsuyuki
Tanaka Kunihiko
Ueda Yuji
Bascomb, Jr. Wilbur L.
Sumitomo Chemical Company Limited
LandOfFree
Process for separation and purification of dihydric phenols does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Process for separation and purification of dihydric phenols, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for separation and purification of dihydric phenols will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1017346