Preparation of Coal Tar Pitch as Carbon Fibers Precursor from Coal Tar

Coal tars and coal tar pitches.

Numerous studies, mostly case reports, have found that occupational exposure to coal tars or coal-tar pitches (coal-tar distillates) is associated with skin cancer, including scrotal cancer; workers in these studies have included patent-fuel (coal-briquette) workers, pitch loaders, workers in electrical trades, and optical-lens polishers (IARC 1985, 1987). A 1946 study in the United Kingdom fou...

Cold Applied Coal Tar Paints

Carbon Foam Production from a Thermo- Chemically Modified Commercial Coal Tar Pitch

Introduction The unique properties of carbon foam mainly depend on the precursor features and synthesis conditions. For the highly thermal and electrical conductive carbon foam, an anisotropic pitch precursor is required [1, 2]. A lot of factors influence the foaming process, but temperature and pressure are the most critical aspects [3]. The aim of the present investigations is to adjust by ap...

Coal Tar Analysis by Lc/ms

The production of liquids from coal gives rise to complex intermediates which require detailed analysis to understand the processes occurring and to make effective use of the products. Analysis has hitherto been based on structural parameters from NMR methods (1) to give the average characteristics of the sample, supplemented by molecular information from GC and GC/MS. The gas chromatographic a...

Occupational Exposures during Coal-tar Distillation

Coal tar is obtained by cooling the gas that is formed during the destructive distillation of coal to approximately ambient temperature. It is a black, viscous liquid composed primarily of a complex mixture of condensed-ring aromatic hydrocarbons. It may contain phenolic compounds, aromatic nitrogen bases and their alkyl derivatives, and paraffinic and olefinic hydrocarbons. Coal-tar pitch is t...