Tars, liquid

The separation of the components of a liquid mixture by treatment with a solvent in which one or more of the desired components is preferentially soluble is known as liquid-liquid extraction — an operation which is used, for example, in the processing of coal tar liquids and in the production of fuels in the nuclear industry, and which has been applied extensively to the separation of hydrocarbons in the petroleum industry. In this operation, it is essential that the liquid-mixture feed and solvent are at least partially if not completely immiscible and, in essence, three stages are involved ... 

To improve processing and to plasticize the mbber compound, numerous processing agents have been used over the years, eg, petroleum and ester plasticizers, resins and tars, liquid mbber peptizers, peptizers, fatty acids and derivatives from vegetable oils, and polyethylene and hydrocarbon waxes. 

Tars, liquid, including road asphalt and oils, bitumen and cut backs 1999... 

When coal is heated in a closed vessel, it cannot bum because oxygen is lacking. Coal decomposes into a variety of substances like coal gas (gas), tar (liquid) and coke (solid). 

COAL TAR NAPHTHA or COAL TAR OIL, HEAVY DISTILLATE (8030-30-6) Highly flammable liquid. Forms explosive mixture with air [explosion limits in air (vol %) 1.0 to uel unknown flash point 100 to 107°F/37 to 42°C Fire Rating 2]. Violent reaction with strong oxidizers concentrated nitric acid. Incompatible with strong acids, nitrates. May attack some plastics, mbber, and coatings. On small fires, use dry chemical powder (such as Purple-K-Powder), foam, or CO2 extinguishers. COAL TAR OIL or COAL TAR, BROWN or COAL TAR EXTRACT or COAL TAR OINTMENT (8007-45-2 69912-81-8 91722-33-7 101316-83-0) see tar, liquid. 

LAVATAR (8007-45-2 69912-81-8 91722-33-7 101316-83-0) see tar, liquid. LAWN-KEEP (94-75-7) see 2,4-dichlorophenoxyacetic acid. LAWRENCITE (7758-94-3) see ferrous chloride. 

A number of fluids mentioned throughout the text that are of importance in physicochemical hydrodynamics do not behave in the Newtonian fashion outlined in Section 2.2. That is, the stress tensor is not a linear function of the rate of strain tensor. Such nonlinear fluids are termed non-Newtonian and the study of their behavior falls under the science of rheology, which deals with the study of the deformation and flow of matter. The materials encompassed by this broad subject cover a spectrum from Newtonian fluids at one end to elastic materials at the other with such fluids as tars, liquid crystals, and silly putty in between. Among the fluids we have discussed in the text that do not exhibit a Newtonian behavior are some polymeric liquids, some protein solutions, and suspensions. 

Asphalt, cut back Cut-backs Bitumen Pencil pitch Pitch prill Road asphalt Road asphalt or tar liquids Tars, liquid, 3.2, 3.3 Tars, liquid, including road asphalt and oils, bitumens and cut backs, 3... 

Salts, see Terminology, Salts, p.247 Solid, see Terminology, Solid, p.247 Solvent, see Solvents, p.224 Sponge, see Terminology, Sponge, p.248 Tars, liquid, see Bituminous Products, p.32... 

The primary intent of the process is to hydrogenate the tar liquid to produce a low sulfur fuel oil or possibly a synthetic crude oil. 

Twu, C.H. An Internally Consistent Correlation for Predicting the Critical Properties and Molecular Weight of Petroleum and Coal-Tar Liquids, Fluid Phase Equilibria. vol. 16, p. 137,1984. 

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