1900, Society of Chemical Industry (Great Britain), Journal of the Society of Chemical Industry, page 652:
About 50 kilos of goudron from Romany oil were carefully cracked at about 400 °C., partly with steam an partly without. In the latter case, dark paraffin wax was obtained from the higher fractions, […]
1854, Auguste-Théodore Vidal, A Treatise on Venereal Diseases, page 377:
M. Ricord states that he has found benefit in the squamous form from the use of the ointment of goudron of M. Emery. This is the formula : OINTMENT OF GOUDRON. R. Goudron, 3 […]
1900, The Petroleum Review, with which is Incorporated "Petroleum", page 596:
... differs widely from Algerian deposits, including geological sections and that of Baku, and contains a large quantity of heavy specimens of strata, photographs of the oil fields and of goudron and heavy hydrocarbons.
1902, The Petroleum Review, with which is Incorporated "Petroleum", page 671:
He is unable to select his crude, and often has to be satisfied with a worse residuum; nor is he in a position to dispose of his goudron as the latter, and for all these reasons, such a refinery is compelled to secure as high a ...
1903, Great Britain. Patent Office, Patents for Inventions. Abridgments of Specifications, page 75:
The carbon electrodes rest on a layer f of goudron, which is tar boiled or evaporated to a density greater than that of ordinary tar.
1906, The Petroleum Review ..., page 156:
In some parts the oil soaks through river alluvia and forms small goudron deposits.
1909, Petroleum Review
For this purpose, the goudrons are diluted with a certain quantity of water, so as to reduce the acid to 50 °B.; at the same time, the mass is energetically blown with air, in order to separate and to bring to the surface of the ...
1923, Petroleum Times
(6) Natural liquid goudrons are solutions of more or less oxidized (resinified) solid hydrocarbons in liquid hydrocarbons, and are therefore thick and viscous.
1969, Periodica Polytechnica: Chemical engineering
Goudrons are treated in propane asphalt extraction units to yield bitumen and heavy paraffinic oils.
1982, V. P. Sukhanov, Petroleum Processing, Imported Publication
Typical characteristics of deasphaltization of goudrons are given in Table 18.
1991, Industrial Chemistry, Krishna Prakashan Media (→ISBN), page 365:
Acid goudrons are further processed to obtain demulsifiers, fuels and regenerated acid.