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Solvent refining of low-temperature tar with liquid ammonia

Journal Article:

Abstract

The middle fractions of low-temperature tar were treated with mixed solutions of H/sub 2/O and liquid NH/sub 3/ at 0/sup 0/ and 20/sup 0/, and with liquid NH/sub 3/ at -10, 0, + 10, and 20/sup 0/, and phase equilibrium between tar acids, neutral oil, and solvents were studied. The distribution ratio ranged from less than 1 to greater than 1 when the solvent contained about 20 percent (by weight) H/sub 2/O. When the solvent contained less than 85 percent (by weight) NH/sub 3/, the yield of extract was small but the purity of phenols in the extracted oil was above 90 percent. Solvent containing about 85 percent NH/sub 3/ (by weight) is considered optimum for separating tar acids from oils. A novel definition is proposed for solvent selectivity as the difference between the concentration of the solute in the extract layer, on a solvent-free basis, and the concentration in the raffinate layer.
Authors:
Publication Date:
Jan 01, 1953
Product Type:
Journal Article
Reference Number:
EDB-80-043552
Resource Relation:
Journal Name: Sci. Rep. Res. Inst., Tohoku Univ., Ser. A; (Japan); Journal Volume: 5
Subject:
01 COAL, LIGNITE, AND PEAT; COAL TAR; PROCESSING; COAL TAR ACIDS; PHASE STUDIES; COAL TAR OILS; ORGANIC SOLVENTS; AMMONIA; PHENOLS; SEPARATION PROCESSES; WATER; YIELDS; AROMATICS; HYDRIDES; HYDROGEN COMPOUNDS; HYDROXY COMPOUNDS; NITROGEN COMPOUNDS; NITROGEN HYDRIDES; OILS; ORGANIC ACIDS; ORGANIC COMPOUNDS; OTHER ORGANIC COMPOUNDS; OXYGEN COMPOUNDS; SOLVENTS; TAR; 010500* - Coal, Lignite, & Peat- Products & By-Products
OSTI ID:
5631912
Country of Origin:
Japan
Language:
English
Other Identifying Numbers:
Journal ID: CODEN: SRTAA
Submitting Site:
TIC
Size:
Pages: 377-394
Announcement Date:
Apr 01, 1980

Journal Article:

Citation Formats

Ishida, K. Solvent refining of low-temperature tar with liquid ammonia. Japan: N. p., 1953. Web.
Ishida, K. Solvent refining of low-temperature tar with liquid ammonia. Japan.
Ishida, K. 1953. "Solvent refining of low-temperature tar with liquid ammonia." Japan.
@misc{etde_5631912,
title = {Solvent refining of low-temperature tar with liquid ammonia}
author = {Ishida, K}
abstractNote = {The middle fractions of low-temperature tar were treated with mixed solutions of H/sub 2/O and liquid NH/sub 3/ at 0/sup 0/ and 20/sup 0/, and with liquid NH/sub 3/ at -10, 0, + 10, and 20/sup 0/, and phase equilibrium between tar acids, neutral oil, and solvents were studied. The distribution ratio ranged from less than 1 to greater than 1 when the solvent contained about 20 percent (by weight) H/sub 2/O. When the solvent contained less than 85 percent (by weight) NH/sub 3/, the yield of extract was small but the purity of phenols in the extracted oil was above 90 percent. Solvent containing about 85 percent NH/sub 3/ (by weight) is considered optimum for separating tar acids from oils. A novel definition is proposed for solvent selectivity as the difference between the concentration of the solute in the extract layer, on a solvent-free basis, and the concentration in the raffinate layer.}
journal = {Sci. Rep. Res. Inst., Tohoku Univ., Ser. A; (Japan)}
volume = {5}
journal type = {AC}
place = {Japan}
year = {1953}
month = {Jan}
}