Coal, incompatibilities with

Incompatible with coal tar, ichthammol, phenol, and resorcinol. 

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. 

COAL OIL (8008-20-6) Forms explosive mixture with air (flash point 100-150 F/ 38-66°C). Violent reaction with oxidizers. Incompatible with nitric acid. Flow or agitation of substance may generate electrostatic charges due to low conductivity. 

Asphaltene constituents in coal liquids are important for several reasons (1) they contribute to many problems in the processing of crude oil (2) they contribute to instabilities in processing (3) they lead to excessive viscosity, contributing to pumping expense, clogging, and slow processing (4) the presence of asphaltene constituents can lead to incompatibility with some solvents used in petroleum processing and (5) asphaltene constituents lead to coke formation under some circumstances. 

Current concepts for refining the products of coal liquefaction processes rely for the most part on the already existing petrolenm refineries, although it must be recognized that the acidity (i.e., phenol content) of the coal liquids and the potential incompatibility of the coal liquids with conventional petroleum (or even heavy oil) feedstocks may pose severe problems within the refinery system (European Chemical News, 1981). 

The backup material must be unaffected by any solvent contained in the sealant. Backup material containing asphalt, coal tar, or polyisobutylene should never be used. These ex-trudable oils are incompatible with some sealants and may cause loss of adhesion. It is quite possible that these extrudables may cause staining of porous substrates. 

Deep mine excavations perturb the stresses in the surrounding rocks, reducing some components from values initially of the order of 100 MPa practically to zero. The resulting stress differences can exceed the strength of competent rock and cause earthquakes (often called rock bursts, coal bumps, etc.). Seismic data show clearly that many earthquakes at mines have non-DC mechanisms, usually with predominantly dilatational radiation patterns, that are incompatible with shear faulting. 

Precaution Wear safely glasses, PVC coaled gloves incompat. with strong oxidizers... 

Goal Tar. In roofing, coal tar is used as mopping bitumen in between 15 and 20% of the BUR roofs installed. Coal-tar pitch and asphalt are considered incompatible and should not be mixed. If mixed, an oily exudate is formed that plasticizes the bitumen, and the mixture remains soft and does not weather well. For this reason, if coal tar is used in BUR systems the felts must be coal-tar saturated. There has been some success using asphalt-coated fiber-glass mat felts with coal-tar pitch. However, this has only been done for a limited number of years so the actual compatibiHty is not fully known. 

In essence, all of the environmental problems associated with coal mining and the disposal of the lithic wastes to which it gives rise can be attributed to a single cause the incompatibility... 

DISPOSAL AND STORAGE METHODS contain and dispose of coal tar pitch as a hazardous waste dispose of in accordance with federal, state, and local regulations store in tightly closed containers in a cool, well-ventilated area separate from incompatible materials, such as strong oxidizers keep away from sources of ignition, such as smoking and open flames. 

Extreme visibility issues also exist with SCs. These ate also bidirectional vehicles in that they shuttle coal between the CM and the boot end of the conveyor belt without turning. An incompatibility between the steering wheel action and... 

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