mechanism of distillation of coal tar
SCI LECTURE PAPERS SERIES A HISTORY OF TAR .
works to use tar as a fuel, burning it under the retorts. The alternative, distillation, did not become common practice until uses had been found for the products of distillation: naphtha, creosote and pitch. The first commercial use for crude tar was probably as a waterproof coating on wood or metals but it was not well adapted to this purpose.
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Coal tar Material DB RoHS Reach
Coal tar causes increased sensitivity to sunlight, so skin treated with topical coal tar preparations should be protected from sunlight. The residue from the distillation of hightemperature coal tar, primarily a complex mixture of three or more membered condensed ring aromatic hydrocarbons, was listed on 28 October 2008 as a substance of very high concern by the European Chemicals Agency .
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Final Report of the Cosmetic Ingredient Review Expert ...
The composition of Coal Tar is variable, but generally it consists of 2 to 8% light oils (benzene, toluene, xylene); 8 to 10% middle oils (phenols, cresols, and naphthalene); 8 to 10% heavy oils (naphthalene and derivatives); 16 to 20% anthracene oils (mostly anthracene); and about 50% pitch (Gosselin et al., 1984).
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Difference Between Bitumen and Tar | Difference Between
Formation of Tar. Tar can form in a variety of ways and tar will have different properties depending on how it forms. Two common types are coal tar and wood tar. Coal tar is distilled from petroleum and coal sources while wood tar is obtained from vegetation through a similar distillation process.
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Coal Tar |
Coal tar can be distilled into many fractions to yield a number of useful organic products, including benzene, toluene, xylene, naphthalene, anthracene, and phenanthrene. These substances, called the coaltar crudes, form the starting point for the synthesis of numerous products—notably dyes, drugs, explosives, flavorings, perfumes, preservatives, synthetic resins, and paints and stains.
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Carbonization of Coal Encyclopedia of Life Support Systems
Carbonization of coal, thermal decomposition of coals in the absence of air, represents one of the largest utilizations of coal, and is an essential process for production of a carbonaceous residue (coke), gas, and tar.
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Project Report on Coal Tar Distillation (Allied Chemical ...
coal tar distillation (eiri1092) Coaltar is produced by the dry distillation of coal and is therefore a by product in the manufacture of coal gas. For a considerable time after the discovery of coal gas, the tar produced was considered merely an encumbrance and was used mainly as a pigment or fuel.
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USA Continuous distillation of tar Google Patents
The invention aims at arranging the continuous distillation of coaltar in such a way as t obtain both the advantages of operation with high vacuum in the pitch distilling columns, namely the avoidance of decomposition reactions in the tar within the continuous heater (tubular oven), and the special advantages of distillation at atmospheric pressure, namely the smaller costs of construction of the .
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Novel Solvent Deasphalting Process by Vacuum Residue ...
The results revealed that the SDA process was improved by blending with coal tar. The yield of deasphalted oil (DAO) from VR blended with 10% CT was wt % higher than that obtained from VR alone. The contents of nickel and vanadium decreased by 5%, and the sulfur content also decreased, whereas the contents of carbon residue and nitrogen remained unchanged.
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How is Crude Coal Tar Derived 1
How is Crude Coal Tar Derived? Author: Mark MorrisCoopers Creek Chemical Corporation November 2005 INTRODUCTION Crude Coal Tar is a by product of the Coking process. Coking is the process of heating coal in coke ovens to drive volatile matter from it. .
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Coal Tar Refining Co
Coal Tar Refining Company (CTR) has established in 1997 with 100,000 MT annual production capacity. The company's operations focus in refining and distillation of Coal Tar in order to producing valuable chemical derivatives. CTR is the greatest Coal Tar Refining Company in Middle East and the most modern technology is applied by our refinery.
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Tar | definition of tar by Medical dictionary
tar [tahr] a dark brown or black viscid liquid from the wood of various species of pine, or found as a byproduct of the destructive distillation of bituminous coal (see coal tar). It is a complex mixture, the source of organic substances such as cresol, creosol, naphthalene, paraffin, phenol, and toluene. Formerly used as an oral medication in ...
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GC/MS ANALYSIS OF COAL TAR COMPOSITION PRODUCED .
The ester groups of coal tar (Table 6) contain main ly some oxygen compounds, such as ketone, acid, furan, as well as some small amount o f aromatics compound containing N and S, such as benzene sulfonic acid and nitrile, etc.
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Enhancement in graphitization of coal tar pitch by ...
graphitization degree are studied using transmission electron microscopy, and a mechanism for the graphitization of CTP, in the presence of CNTs, is proposed. Introduction Coaltar pitch (CTP) is the solid residue remaining a er the distillation of coal, and it is widely used in the molded graphite
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Full text of "Distillation of coal tar" Internet Archive
Full text of "Distillation of coal tar" See other formats iliinois institute of Tecimoiogy UNWERSJTV LIBRARIES AT 125 Wilsnack, G. C. Distillation of coal tar For Use In Ll^jranf Only :'jsiws«*ifcasa55*i il» A THESIS Presented by G. C. riLSNACK AND S. E. LUNAK To The PRESIDENT AND FACULTY OP ARMOUR INSTITUTE OF TECHNOLOGY For the Degree of Bachelor of Science in Chemical Engineering Having ...
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Creosote (Coal TarDerived) | OEHHA
Occurence (s)/Use (s) Wood preservative, waterproofing agent, antifouling agent, lubricant, animal repellent, insecticide, animal dip, fungicide; component of roofing pitch, fuel oil; distillation product of coal tar, product of incomplete coal combustion.
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Overview of CoalTar Products Poisoning Toxicology ...
Fragments of tar paper or other sources of coal tars found in the GI tract, or chemical detection of coaltar products in liver, kidney, serum, or urine, aid in confirming the diagnosis. Laboratory changes include hypoglycemia, and increases in serum liver enzymes, thymol turbidity, chloride, and phosphorus.
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Standard Specification for CoalTar Pitch Used in Roofing ...
This specification covers the testing and physical requirements of two types of coaltar pitch suitable for use in the construction of builtup roofing, dampproofing, and membrane waterproofing systems. The coaltar pitch shall be prepared from selected crudes using suitable refining processes, and shall be homogeneous and free of water.
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The characterization of woodpreserving creosote by ...
creosote is defined as a distillate from coal tar made by hightemperature carbonization of bituminous coal; the boiling range of the creosote is at least 125° C beginning at about 200° C. Various other creosotes may be defin ed, the physical and chemical characteristics of which are .
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