Carbolic Oil

Carbolic Oils and Tow Temperature Tar Middle Oil, TarMcids. The fractions of some coke-oven tars, distilling in the range of 180—240°C, and the middle oil fraction (180—310°C) from low temperature tars are treated for the recovery of tar acids (19). 

Carbol. carbolic, carbolized, carbolated. kalk, n. carbolated lime. >dl( n. carbolated oil. salbe,/. Pharm.) ointment of phenol. carbolic acid, phenol. ldsung, /. carbolic acid solution. seife, /. carbolic acid soap. 

Synonyms AI3-01814 AIDS-352 Baker s P and S liquid and ointment Benzenol BRN 0969616 Carbolic acid Carbolic oil Caswell No. 649 CCRIS 504 CRS EINECS 203-632-7 EPA pesticide chemical code 064001 FEMA No. 3223 Fenosmolin Fenosmoline Hydroxy-benzene IPH Izal Monohydroxybenzene Monophenol NA 2821 NCI-C50124 NSC 36808 Oxybenzene Phenic acid Phenic alcohol Phenol alcohol Phenyl hydrate Phenyl hydroxide Phenylic acid Phenylic alcohol RCRA waste number U188 UN 1671 UN 2312 UN 2821. 

Compound Name Hydrogen, Liquefied Camphor Oil Nitrogen, Liquefied Nitrogen Tetroxide Oxygen, Liquefied Oil Mineral Carbolic Oil Litharge... 

CARBOLIC OIL Middle Oil, Liquefied Phenol Poisonous Liquid or Solid, Class B 3 2 0 ... 

Phenols and Cresols Carbolic Oil Creosote, Coal Tar Cresols... 

First, the tar acids were removed from the naphtha fractions of light oils and, in the case of CVR tars, carbolic oil. The oils were then mixed with 25—35% sulfuric acid. After separation of the sulfates, the aqueous solution was diluted with water and the resinous material skimmed off. The diluted sulfate solution was boiled to expel any neutral oils, dried by the addition of solid caustic soda or azeotropically with benzene, and fractionated to yield pyridine, 2-methylpyridine (a-picoline), and a fraction referred to as 90/140 bases, which consisted mainly of 3- and 4-methylpyridines and 2,6-dimethylpyridine (2,6-lutidine). Higher boiling fractions were termed 90/160 and 90/180 bases because 90% of the product distilled at 160 and 180°C, respectively. 

Creosote. In coal-tar refining, the recovery of tar chemicals leaves residual oils, including heavy naphtha, dephenolated carbolic oil, naphthalene drained oil, wash oil, strained anthracene oil, and heavy oil. These are blended to give creosotes conforming to particular specifications. 

These materials are extracted from the dephenolized oil with aqueous solutions of mineral acids. This operation may be carried out on the entire neutral oil, or it may be done on the solvent naphtha fraction. In the latter case, only the lowest-boiling bases (picolines and lutidines) are recovered, and die higher-boiling bases (mostly qninoline and isoquinolinc) can be recovered firom postnapthalene fractions or left in the residue for disposal. In European practice, the topping is carried out so that several fractions are obtained carbolic oil, which yields the phenols and lower-boiling bases and naphthalene oil, from which naphthalene is recovered by crystallization. 

Carbolic Oil Fresh air mask for confined areas rubber gloves protective clothing full face shield. Remove victim to fresh air, keep quiet and warm. If breathing stops, start artificial respiration. Remove contaminated clothing wash skin with soap and water. Flush eyes with water for 15 minutes or until physician arrives. 

Carbolic Oil 117 No data No data Foam, carbon dioxide, dry chemical Not pertinent The solid often evaporates without first melting 466 No ... 

Ibe use of slaked lime to regenerate caustic soda by causticising sodium carbonate is a feature of a number of other processes (e.g. the Bayer alumina process — section 31.15 and the processing of carbolic oil [31.24]). 

Primary distillation of crude tar produces pitch (residue) and several distillate fractions, the amounts and boiling ranges of which are influenced by the nature of the crude tar (which depends upon the coal feedstock) and the processing conditions. For example, in the case of the tar from continuous vertical retorts, the objective is to concentrate the tar acids, (phenol, cresols, and xylenols) into carbolic oil fractions. On the other hand, the objective with coke oven tar is to concentrate the naphthalene and anthracene components into naphthalene oil and anthracene oil, respectively. 

Products recovered from light oil and carbolic oil include phenols and pyridines (see Chapters 5.3.3 and 14.2.1), from naphthalene oil, naphthalene (see Chapter 9.2.1), from wash oil, acenaphthene (see Chapter 10.3) and from anthracene oil, anthracene, phenanthrene and carbazole (see Chapters 11.1, 12.1, 14.5.5). The pitch residue is further processed to yield industrial carbon products (see Chapter 13). 

In the tar refining process, phenol is recovered from the carbolic oil fraction after primary distillation (see Chapter 3.2.3). 

Table 5.4 shows the composition of a carbolic oil obtained by refining of high-temperature coal tar its processing scheme is depicted in Figure 5.17. 

Carbolic oil, with a phenol content of around 25%, is extracted in the first stage with caustic soda. The bases and neutral oils are driven off from the crude pheno-late lye by steam distillation ( steam stripping ). In the next step of the process, a two-stage neutralization ( springing ) of the refined phenolate lye with CO2 is carried out, to recover the crude phenol. The crude phenol can be further refined by extraction with diisopropyl ether, and then worked up to phenol and alkylphenols by distillation and crystallization. 

Carbolic oil extraction 2 Steam stripping 3 Caustidzation 4 Limekiln 5 Acidification (liberation of crude phenols) 6 Soda lye extraction 7 Crude phenol extraction 8 Distillation... 

Figure 5.17 Flow diagram for the recovery of crude-phenol from carbolic oil...

The proportion of cresols in the tar acids of coal tar is between 40 and 50% cresols are recovered jointly with phenol from the carbolic oil fraction of coal tar. A second source of cresols are refinery waste streams, arising during processing of heavy naphtha fractions from crackers, which contain about 60% cresol. 

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