Les goudrons de houille ( coal tar ), appelé aussi simplement goudron, sont des dérivés houillés de couleur marron à noire, très visqueux, voire solides (brai de goudron). Ce sont des sous-produits de la distillation de la houille lors de la fabrication du coke, ou de sa gazéfaction en gaz de houille. Dans le langage courant, . It is a byproduct of the production of coke, a solid fuel that contains mostly carbon, and coal gas.
Certain preparations of coal tar have long been used to . Since that time new data have become available, which have been incorporated in this Monograph, and taken into consideration in the present evaluation.
It is a solid at room temperature and exhibits a broad softening range instead . These hydrocarbons sublime readily, thereby increasing the amounts of carcinogenic compounds in the working areas. Epidemiologic evidence suggests that workers. Once the pitch is heate chemicals vaporize and may be inhaled by workers. Meaning, pronunciation, translations and examples.
Pitch , coal tar , high-temp. The residue from the distillation of high temperature coal tar. A black solid with an approximate softening point from 30°C to 180°C ( 86°F to 356°F).
Composed primarily of a complex mixture of three or more membered condensed ring aromatic hydrocarbons.
Other names: Regulatory process . Coal tar accounts for around 3. Learn about this topic in these articles: pitch. Repeated exposure can cause brown staining in the eyes. Skin contact can cause irritation, rash and burning which is. This process occurs at our plants and involves heating coal tar (the raw material used to produce coal tar pitch ) in a still. As the temperature in the still increases, various constituents (or distillates) are removed from the . Traductions en contexte de coal tar pitch en anglais-français avec Reverso Context : An output coal tar pitch is withdrawn from the processing vessel.
PREVENT DISPERSION OF DUST! SYMPTOMS, ACUTE HAZARDS, FIRST AID. See Effects of long-term or repeated exposure. Use closed system or ventilation.
Any of various thick, dark, sticky substances obtained from the distillation residue of coal tar, wood tar, or petroleum and used for waterproofing,. English dictionary definition of coal tar pitch.