Abstract: A device for taking a sample of fluid from a drum includes a dip-tube having at its lower end a closure member, a piston having at the end of a rod a disk adapted to slide in the dip-tube, to which it is sealed, and members for temporarily positioning the piston disk in the heightwise direction. A support ring is adapted to rest on the periphery of the filler orifice of a substantially horizontal wall of the drum and has a passage in which the dip-tube slides and to which the dip-tube is sealed, the disk remains inside the dip-tube at all times, and the closure member is in the form of a fixed end-piece in which is provided an orifice provided with non-return means enabling fluid to be aspirated into the tube but preventing the fluid from escaping under it own weight.

Abstract: The present invention relates to a device for simultaneously projecting a liquid or pasty product and a powdery, granulous or fibrous filler to make a reinforced plastic wall coating, in which the product is brought by pumping to a centrifugal projection member with central supply channel, wherein it comprises, for projecting the product, a revolving spray device with its central supply channel and, for projecting the powdery filler, a centrifugal wheel and a means for supplying the filler to the centrifugal wheel, the revolving spray device and the centrifugal wheel being mounted on the same shaft in the vicinity of each other.

Abstract: A process for the facile isolation of distillation by-products of coking operations, which include dusts and tars, comprising cooling said distillation by-products with ammoniacal waters and adjusting the dust:tar ratio between 1.3 and 1.6, thereby allowing separation of substantially clarified ammoniacal waters and a substantially solid product of said tars and dusts.

Abstract: Pulverulent coke and granular reactive coke are produced, respectively, from fines and grains of coal of grades which are not normally usable for coking, containing more than 15% of volatile matter and having a swelling index between 1 and 8, by carbonization between 600.degree. C and 1100.degree. C, wherein combustion air in excess of that which would be necessary to bring the coke to the desired coking temperature is introduced into a slightly inclined rotary tubular oven through which the coal passes during its conversion into coke, the air introduction being effected between the coke outlet and the zone in which the product reaches its maximum temperature and being controlled so that the temperature of the gases issuing from the oven is kept above 600.degree. C. At least 60% of the air is preferably introduced at the downstream end of the oven, and further air may be introduced at intermediate points along the oven length.