Abstract: A process for denitrogenation of hydrocarbonated compounds containing basic and/or neutral nitrogenous hydrocarbonated compounds characterized by the fact that the hydrocarbonated compounds are placed in contact with a polymeric material including at least one polymer P obtained from at least one non-styrenic monomer A with at least one polar function generating hydrogen bonds with the nitrogenous hydrocarbonated compounds.

Abstract: The invention concerns a petroleum product and a process for the production of a petroleum product which can form part of a blend for an internal combustion engine fuel, the process comprisinga) hydrotreating a hydrocarbon feedstock at a partial pressure of hydrogen at the reactor outlet of about 0.5 MPa to about 6 MPa,b) separating a product (P) from step a) into a product (P1) with a final boiling point of about 300.degree. C. and a product (P2) with an initial boiling point greater than the final boiling point of product (P1),c) performing a liquid-liquid extraction with a solvent (S1), to produce an extract (E1) and a raffinate (R1) from product (P2),d) recovering solvent (S1) from raffinate (R1) to produce a product (Q1), depleted in solvent (S1), which has improved qualities and contains less than 500 ppm by weight of sulphur.

Abstract: The invention concerns a petroleum product and a process for the production of a petroleum product which can form part of a blend for an internal combustion engine fuel, the process comprisinga) hydrotreating a hydrocarbon feedstock at a partial pressure of hydrogen at the reactor outlet of about 0.5 MPa to about 6 MPa,b) separating a product (P) from step a) into a product (P1) with a final boiling point of about 300.degree. C. and a product (P2) with an initial boiling point greater than the final boiling point of product (P1),c) performing a liquid-liquid extraction with a solvent (S1), to produce an extract (E1) and a raffinate (R1) from product (P2),d) recovering solvent (S1) from raffinate (R1) to produce a product (Q1), depleted in solvent (S1), which has improved qualities and contains less than 500 ppm by weight of sulphur.

Abstract: A fuel for internal combustion engines having an improved cetane index and lower sulfur content is obtained from a hydrocarbon charge, by a process comprising a step (a) for distillation (D1) in which a bottom product (Q1) is obtained via a line 3 and in which a top product (T1) is obtained via a line 2, a step (b) of liquid/liquid extraction (LE) using a solvent (S1) to obtain a raffinate (R1), (line 5) an extract from which product (Q1) is obtained (line 6), a step c) separating (D2) the raffinate (R1) enabling a product (Q2) to be obtained via line 7, which product has a low solvent (S1) content, and a step (d) of hydrotreatment (HDS) in which the mixture of the products (T1) and (Q2) are subjected to hydrotreatment with a hydrogen partial pressure of less than 10 megapascals, to obtain a product (P) (line 9) which has improved qualities and which contains less than 500 ppm by weight sulphur.

Abstract: A process for obtaining a fuel for internal combustion engines from a hydrocarbon charge, comprising a step (a) for distillation (D1) in which a bottom product (Q1) is obtained via a line 3 and in which a top product (T1) is obtained via a line 2, a step (b) of liquid/liquid extraction (LE) using a solvent (S1) to obtain a raffinate to (R1), (line 5) and an extract from which product (Q1) an extract (E1) is obtained (line 6) and a raffinate, a step c) of separating (D2) the raffinate (R1) enabling a product (Q2) to be obtained via line 7, which product has a low solvent (S1) content, and a step (d) of hydrotreatment (HDS) in which the mixture of the products (T1) and (Q2) are subjected to hydrotreatment with a hydrogen partial pressure of less than 10 megapascals, to obtain a product (P) (line 9) which has improved qualities and which contains less than 500 ppm by weight sulphur.

Abstract: In a fluidized catalytic cracking (FLC) type unit for contacting of a hydrocarbon feedstock with hot solid particles in a fluidized bed in an upright tubular-type upflow hydrocarbon conversion reactor, there is provided, between the means for fluidization and the means for injection of the feedstock, a means for causing the fluidized phase at the periphery of the reactor to rotate about the axis of the reactor.

Abstract: A device for injection of a hydrocarbon feedstock into a catalytic cracking reactor comprising, from upstream to downstream in the direction of flow of the feedstock, an intake and mixing system (5) for the liquid hydrocarbon feedstock and steam, a venturi tube (6) whose entrance cone (10) is joined to said intake and mixing system (5), and a protective cap (7) that is integral with the discharge cone (14) of the venturi tube and is provided with an orifice (16) for injection of the feedstock into the reactor. The dimensions of the venturi tube (6) are such that the velocity of the mixture of liquid feedstock and steam attains therein sonic conditions at the level of the throat (13), and the rectilinear throat located between the discharge cone (14) and the entrance cone (10) is connected to such cones continuously by a curved section without making an angle exceeding about 5 degrees and about 15 degrees, respectively, with the axis of the venturi tube.

Abstract: The invention relates to a method for the continuous cleaning of the inside of a tube in which a fluid circulates, in which method there is continuously driven in rotation within the tube by the fluid a movable element, one end of which is fastened to one end of the tube through a mechanical linkage permitting it to rotate freely on itself about the axis of the tube. In accordance with the invention, the movable element comprises at least one sharp edge designed to scrape the inner surface of the tube, this edge being disposed so that during the rotation of the movable element it is, along every cross section of the tube, the portion of the movable element farthest removed from the axis of the tube.

Abstract: A process for improving the deasphalting of a heavy hydrocarbon feedstock with a solvent by subjecting the feedstock to shearing alternatively after and/or before the addition of at least a portion of the solvent to the feedstock is disclosed. Alternative means for effecting the shearing and desired ranges of shear are also disclosed.

Abstract: The invention relates to a device for maintaining in position one end of an element driven in rotation by a fluid circulating in a tube (12), the other end of said element being free, said device being of the type which comprises a part forming a bearing (1) and adapted to be rigidly attached to one end of the tube, and an element (4), mounted for rotation relative to the part forming a bearing (1) and adapted to be attached to one end of the movable element (13). In accordance with the invention, the part forming a bearing (1) is a one-piece part made of a rigid material that is capable of being elastically deformed, said one-piece part comprising at least two flanges (2) spaced apart by such a distance that they can be force-fitted into an open end of said tube (12) to bear elastically on its inner wall so as to rigidly join the part forming a bearing (1) to the tube.

Abstract: The invention concerns a positioning device for a tube cleaning element rotatably driven by fluid passing through the tube. This is particularly useful for heat exchanger tubes. This device includes an open-frame support member (1) having one or more parts (8a, 8b) (preferably of generally cylindrical shape) for mounting on the outside on one end of said tube, and further includes a spindle (2) mounted for rotation with respect to said frame (1) along the axis of the end of said tube and adapted to be fastened to said rotatable element.

Abstract: Apparatus for loading an enclosure with particulate solids includes a loading hopper, a discharge chute (integral with the hopper), and a movable member disposed below the outlet opening of the chute. The movable member includes a shaft driven in rotation by a motor and flexible, moderately hard deflecting strips, which are articulated to the shaft or to a structure rigidly integral with the shaft, so as to spread out from the shaft at an angle by the effect of centrifugal force when driven in rotation. At least one discharge opening is provided in the side wall of the hopper and/or of the chute in the direction of the rotating deflecting strips.

Abstract: The invention relates to a method for purifying a gas mixture containing at least one undesirable gas compound utilizing certain sulfonamide or sulfamide solvents.

Abstract: Dienic and/or aromatic hydrocarbons are separated from hydrocarbon fractions employing known liquid-liquid extraction and/or extractive distillation procedures and at least one sulfonamide solvent conforming to the general formula ##STR1## wherein R', R" and 4'" can be linear or branched, saturated or unsaturated, aliphatic groups possessing from 1 to 18 carbon atoms, wherein two or three of groups R', R" and R'" can be identical, wherein one of the groups R" and R'" can be replaced with a hydrogen atom, and wherein at least one of groups R', R" and R'" is unsaturated.

Abstract: Apparatus for distribution of particulate matter in a tank or similar enclosure, comprising a feed hopper, a discharge conduit integral with the hopper, a motor-driven rotating shaft disposed axially of the outlet opening of the conduit, and downstream of said outlet opening is at least one fairly soft deflecting means carried on the shaft and articulated thereto so as to diverge angularly by the effect of the centrifugal force when driven in rotation. The apparatus is for use particularly in charging a chemical reactor with catalyst particles and in the storage of grains in silos.

Abstract: Process for the extraction of diene or aromatic hydrocarbons from petroleum hydrocarbon fractions employing sulfonamides as solvents. Also described are new sulfonamides useful as solvents for the extraction process.