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Title: Refining Lurgi tar acids

Abstract

There is disclosed a process for removing tar bases and neutral oils from the Lurgi tar acids by treating the tar acids with aqueous sodium bisulfate to change the tar bases to salts and to hydrolyze the neutral oils to hydrolysis products and distilling the tar acids to obtain refined tar acid as the distillate while the tar base salts and neutral oil hydrolysis products remain as residue.

Inventors:
Publication Date:
OSTI Identifier:
6521629
Patent Number(s):
US 4443636
Assignee:
Koppers Company Inc. EDB-84-162558
Resource Type:
Patent
Resource Relation:
Patent File Date: Filed date 14 Jul 1982; Other Information: PAT-APPL-398074
Country of Publication:
United States
Language:
English
Subject:
01 COAL, LIGNITE, AND PEAT; COAL TAR ACIDS; LURGI PROCESS; PURIFICATION; RECOVERY; REFINING; AQUEOUS SOLUTIONS; CHEMICAL REACTION YIELD; DISTILLATION; HYDROLYSIS; OILS; RESIDUES; SALTS; SODIUM SULFATES; ALKALI METAL COMPOUNDS; CHEMICAL REACTIONS; COAL GASIFICATION; DECOMPOSITION; DISPERSIONS; GASIFICATION; LYSIS; MIXTURES; ORGANIC ACIDS; ORGANIC COMPOUNDS; OTHER ORGANIC COMPOUNDS; OXYGEN COMPOUNDS; PROCESSING; SEPARATION PROCESSES; SODIUM COMPOUNDS; SOLUTIONS; SOLVOLYSIS; SULFATES; SULFUR COMPOUNDS; THERMOCHEMICAL PROCESSES; YIELDS; 010404* - Coal, Lignite, & Peat- Gasification; 010500 - Coal, Lignite, & Peat- Products & By-Products

Citation Formats

Greco, N.P. Refining Lurgi tar acids. United States: N. p., 1984. Web.
Greco, N.P. Refining Lurgi tar acids. United States.
Greco, N.P. 1984. "Refining Lurgi tar acids". United States. doi:.
@article{osti_6521629,
title = {Refining Lurgi tar acids},
author = {Greco, N.P.},
abstractNote = {There is disclosed a process for removing tar bases and neutral oils from the Lurgi tar acids by treating the tar acids with aqueous sodium bisulfate to change the tar bases to salts and to hydrolyze the neutral oils to hydrolysis products and distilling the tar acids to obtain refined tar acid as the distillate while the tar base salts and neutral oil hydrolysis products remain as residue.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = 1984,
month = 4
}
  • Methods are provided for refining natural oil feedstocks and producing dibasic esters and/or dibasic acids. The methods comprise reacting a terminal olefin with an internal olefin in the presence of a metathesis catalyst to form a dibasic ester and/or dibasic acid. In certain embodiments, the olefin esters are formed by reacting the feedstock in the presence of a metathesis catalyst under conditions sufficient to form a metathesized product comprising olefins and esters, separating the olefins from the esters in the metathesized product, and transesterifying the esters in the presence of an alcohol to form a transesterified product having olefin esters.
  • Methods are provided for refining natural oil feedstocks and producing dibasic esters and/or dibasic acids. The methods comprise reacting a terminal olefin with an internal olefin in the presence of a metathesis catalyst to form a dibasic ester and/or dibasic acid. In certain embodiments, the olefin esters are formed by reacting the feedstock in the presence of a metathesis catalyst under conditions sufficient to form a metathesized product comprising olefins and esters, separating the olefins from the esters in the metathesized product, and transesterifying the esters in the presence of an alcohol to form a transesterified product having olefin esters.
  • Methods and systems for making dibasic esters and/or dibasic acids using metathesis are generally disclosed. In some embodiments, the methods comprise reacting a terminal olefin ester with an internal olefin ester in the presence of a metathesis catalyst to form a dibasic ester and/or dibasic acid. In some embodiments, the terminal olefin ester or the internal olefin ester are derived from a renewable feedstock, such as a natural oil feedstock. In some such embodiments, the natural oil feedstock, or a transesterified derivative thereof, is metathesized to make the terminal olefin ester or the internal olefin ester.
  • Methods are provided for refining natural oil feedstocks and producing isomerized esters and acids. The methods comprise providing a C4-C18 unsaturated fatty ester or acid, and isomerizing the fatty acid ester or acid in the presence of heat or an isomerization catalyst to form an isomerized fatty ester or acid. In some embodiments, the methods comprise forming a dibasic ester or dibasic acid prior to the isomerizing step. In certain embodiments, the methods further comprise hydrolyzing the dibasic ester to form a dibasic acid. In certain embodiments, the olefin is formed by reacting the feedstock in the presence of amore » metathesis catalyst under conditions sufficient to form a metathesized product comprising olefins and esters, separating the olefins from the esters in the metathesized product, and transesterifying the esters in the presence of an alcohol to form a transesterified product having unsaturated esters.« less