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Recovery of Phenolics From Tar Distillation Waste Liquors Via Solvent Extraction W. M. Reiter, Engineer A. N. Heller, Supervisor Industrial Waste Division The Barrett Division, Allied Chemical and Dye Corp. New York, N. Y. In a paper presented at the 12th Purdue Industrial Waste Conference the authors reviewed some of the major factors to be considered in the selection of either solvent extraction or steam stripping, as the process of choice in the dephenolization of phenolic waste liquors. This presentation will deal principally with the development aspects, and some of the operating experiences incident to the Barrett phenol recovery process located in Detroit, Michigan. The Detroit Plant of the Barrett Division, Allied Chemical Corporation, is essentially a tar distillation plant. Coke oven tars, a primary raw material, are distilled to produce such intermediate fractions as carbolic oil, high flash solvent, creosote oil, and various types of pitches. The carbolic oil is scrubbed with caustic soda for removal of tar acids and fractionated for recovery of crude naphthalene. Coke oven tars may vary in water content from 2 to 10 per cent by volume. Modern practice usually requires the dehydration of tar prior to distillation. This procedure usually obviates the need for the separation of water from the distillates, and results in a reduction of both the volume and phenolics to be processed. At Detroit tar dehydration is accomplished by feeding the heated crude tar into the lower section of a stainless steel fractionating tower operating at atmospheric pressure. The tower bottoms flow to a reboiler and then to a vapor or flash box for final removal of water. The dehydrated or "DH" tar is then transferred to a tar still for separation into creosote oils, naphthalene oil and pitch. The water vapor combined with some organics exits the vapor box and is returned to the dehydration or "DH" tower. The overhead vapor from the "DH" tower is a mixture of light solvent and water. This stream is condensed and the phases separated. A portion of the light solvent is returned as reflux to the tower; the water containing 194
Object Description
Purdue Identification Number | ETRIWC195818 |
Title | Recovery of phenolics from tar distillation waste liquors via solvent extraction |
Author |
Reiter, W. M. Heller, A. N. |
Date of Original | 1958 |
Conference Title | Proceedings of the thirteenth Industrial Waste Conference |
Conference Front Matter (copy and paste) | http://earchives.lib.purdue.edu/cdm4/document.php?CISOROOT=/engext&CISOPTR=5739&REC=1 |
Extent of Original | p. 194-208 |
Collection Title | Engineering Technical Reports Collection, Purdue University |
Repository | Purdue University Libraries |
Rights Statement | Digital object copyright Purdue University. All rights reserved. |
Language | eng |
Type (DCMI) | text |
Format | JP2 |
Date Digitized | 2008-09-22 |
Capture Device | Fujitsu fi-5650C |
Capture Details | ScandAll 21 |
Resolution | 300 ppi |
Color Depth | 8 bit |
Description
Title | page 194 |
Collection Title | Engineering Technical Reports Collection, Purdue University |
Repository | Purdue University Libraries |
Rights Statement | Digital object copyright Purdue University. All rights reserved. |
Language | eng |
Type (DCMI) | text |
Format | JP2 |
Capture Device | Fujitsu fi-5650C |
Capture Details | ScandAll 21 |
Transcript | Recovery of Phenolics From Tar Distillation Waste Liquors Via Solvent Extraction W. M. Reiter, Engineer A. N. Heller, Supervisor Industrial Waste Division The Barrett Division, Allied Chemical and Dye Corp. New York, N. Y. In a paper presented at the 12th Purdue Industrial Waste Conference the authors reviewed some of the major factors to be considered in the selection of either solvent extraction or steam stripping, as the process of choice in the dephenolization of phenolic waste liquors. This presentation will deal principally with the development aspects, and some of the operating experiences incident to the Barrett phenol recovery process located in Detroit, Michigan. The Detroit Plant of the Barrett Division, Allied Chemical Corporation, is essentially a tar distillation plant. Coke oven tars, a primary raw material, are distilled to produce such intermediate fractions as carbolic oil, high flash solvent, creosote oil, and various types of pitches. The carbolic oil is scrubbed with caustic soda for removal of tar acids and fractionated for recovery of crude naphthalene. Coke oven tars may vary in water content from 2 to 10 per cent by volume. Modern practice usually requires the dehydration of tar prior to distillation. This procedure usually obviates the need for the separation of water from the distillates, and results in a reduction of both the volume and phenolics to be processed. At Detroit tar dehydration is accomplished by feeding the heated crude tar into the lower section of a stainless steel fractionating tower operating at atmospheric pressure. The tower bottoms flow to a reboiler and then to a vapor or flash box for final removal of water. The dehydrated or "DH" tar is then transferred to a tar still for separation into creosote oils, naphthalene oil and pitch. The water vapor combined with some organics exits the vapor box and is returned to the dehydration or "DH" tower. The overhead vapor from the "DH" tower is a mixture of light solvent and water. This stream is condensed and the phases separated. A portion of the light solvent is returned as reflux to the tower; the water containing 194 |
Resolution | 300 ppi |
Color Depth | 8 bit |
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