Chemical process

Details Chemical process Chemical process

2008-05-13

2008-05-13

Drodge, Joseph (Department: 1797)

Liquid purification or separation

Processes

Liquid/liquid solvent or colloidal extraction or diffusing...

C210S634000, C210S909000, C568S749000

Reexamination Certificate

active

10332107

ABSTRACT:
A process for extracting from aqueous solution the alkali metal or ammonium salt of a phenol, naphthol, anthrol or phenanthrol or the corresponding thiol, which comprises contacting an aqueous alkaline or neutral solution of the alkali metal or ammonium salt, in which is dissolved an alkali metal or ammonium fluoride, chloride, bromide, hydroxide, nitrate, nitrite, sulphate, sulphite, sulphide, thiosulphate, phosphate, hydrogen phosphate, carbonate, bicarbonate, cyanate, cyanide, thiocyanate, borate, chlorate, chlorite, hypochlorite, perchlorate, chromate, dichromate or permanganate, with a partially water-miscible organic solvent so as to transfer aqueous solution of the alkali metal or ammonium salt of the phenol, naphthol, anthrol or phenanthrol or corresponding thiol into the solvent while retaining separate aqueous and solvent phases, and thereafter separating the solvent phase containing the alkali metal or ammonium salt and water from the aqueous phase, the ratio of solvent to water in the separated solvent phase being from 0.5:1 to 10:1 w/w.

REFERENCES:
patent: 3355456 (1967-11-01), Sexton
patent: 3609158 (1971-09-01), Torba
patent: 3869499 (1975-03-01), Heath et al.
patent: 4179365 (1979-12-01), Sumi
patent: 4208280 (1980-06-01), Naylor
patent: 4208350 (1980-06-01), Hearon et al.
patent: 4370483 (1983-01-01), Papenfuhs
patent: 4400553 (1983-08-01), Aneja
patent: 4986917 (1991-01-01), Adams et al.
patent: 5705074 (1998-01-01), Brient
patent: 5801241 (1998-09-01), Lim et al.
patent: 6071409 (2000-06-01), Bondy et al.
patent: 763626 (1952-12-01), None
patent: 941544 (1956-03-01), None
patent: 2112095 (1998-03-01), None
patent: 716886 (1954-10-01), None
patent: 2305174 (1997-04-01), None
patent: 58154561 (1983-09-01), None
patent: 60084194 (1985-05-01), None
patent: 11347536 (1999-12-01), None
patent: 1883861 (1966-10-01), None
patent: 1786018 (1993-01-01), None
patent: 9729088 (1997-08-01), None
patent: 9840355 (1998-09-01), None
patent: 0014068 (2000-03-01), None
Korenman Ya I: “Extraction of Phenol with Cyclohexanone from Aqueous Salt Solutions”, Russian Journal of Applied Chemistry, vol. 71, No. 3, 1998, pp. 532-534.
Korenman, Ya I, et al.: “Derivatization as a Method for Improvement of the Efficiency of Extraction of Naphthols and Their Sulfo Derivatives”, Chemical Abstracts, vol. 132, No. 7, Feb. 12, 2000.
Schramm, K.W. et al.: “A New Method for Extraction of C.I. Reactive Red 4 and its Derivates From Water”, Water Research, vol. 22, No. 8, 1988, pp. 1043-1045.
Korenman, Ya I. et al.: “Study of Extraction of Naphthols and Nitrosonaphthols with Ethers”, Chemical Abstracts, vol. 95, No. 20, Nov. 16, 1981.
Korenman, Ya I. et al.: “Extraction-photometric Determination of Phenol, Chlorophenols, and Naphthols in Drinking Water”, Chemical Abstracts, vol. 97, No. 22, Nov. 29, 1982.
Korenman, Ya I. et al.: “Extraction and Photometric Determination of 1-naphthol in 2-naphthol-containing Aqueous Solutions”, Chemical Abstracts, vol. 118, No. 10, Mar. 8, 1993.
Korenman, Ya I. et al.: “Extraction Preconcentration and Photometric Determination of Chlorophenol and Naphthols in Aqueous Media”, Chemical Abstracts, vol. 122, No. 16, Apr. 17, 1995.
Korenman, Ya I. et al.: “Extraction of Naphthols from Aqueous Media”, Journal of Applied Chemistry of the USSR, vol. 64, No. 7, 1991, pp. 1343-1346.
Korenman, Ya I. et al.: “Correlation Dependence of Distribution Coefficients in Aromatic Hydroxy Compound-water Extraction Systems”, Chemical Abstracts, vol. 123, No. 6, Aug. 7, 1995.
Ermolaeva, T.N. et al.: “Extraction of Sterically Hindered Butylphenols by Hydrophobic and Hydrophilic Solvents”, Chemical Abstracts, vol. 122, No. 24, Jun. 12, 1995.
Ermolaeva, T.N. et al.: “Extraction of Phenol and its p-homologs by hydrophilic solvents”, Chemical Abstracts, vol. 123, No. 14, Oct. 2, 1995.
Patent Abstracts of Japan, vol. 007, No. 277 (C-199), Dec. 9, 1983.
Shiao, Min Jen, et al., “Demethylation of Methoxypyridines with Sodium Trimethylsilanethiolate”, HETEROCYCLES (1993), 36(2), 323-8, examples 2E, 2F.
G.R. Newkome, et al., “Chemistry of Heterocyclic Compounds, 17, Improved Synthesis of 2-Pyriodones”, SYNTHESIS, vol. 10, 1974, p. 707.
Ya I. Korenman, Russian Journal of Applied Chemistry, vol. 71, No. 3 (1998), p. 532-534.

Affiliated with

Also associated with

Rating

Chemical process does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Chemical process, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Chemical process will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3918023