摘要:
A flow device intended for a two-phase flow processing enclosure of the natural counter-flow type, in which an ascending gaseous flow and a descending liquid flow circulate. The device is formed by an appreciably horizontal tray having openings for the passage of the ascending gaseous flow, and a channel for recovering the descending liquid flow, the channel discharging into a flow orifice. The flow device includes a single guide device extending beneath the tray and connected to the flow orifice in such a way that the liquid flows on its outer wall. Also, a processing enclosure, particularly for processing a hydrocarbonated or aqueous type liquid flow, containing the flow device.
摘要:
The disclosure relates to a bitumen/polymer composition comprising at least one bitumen and at least one graft polymer, the grafts enabling the bitumen/polymer compositions to be thermoreversibly cross-linked. The disclosure also relates to the use of said bitumen/polymer compositions in fields of application relating to roads, especially in the production of asphalt binders, and in industrial fields of application. The disclosure further relates to the method for producing said thermoreversibly cross-linked bitumen/polymer compositions.
摘要:
The invention relates to a hydrocarbon hydroconversion catalyst comprising a carrier based on refractory oxide, a metal of the group VIII, and a metal of the group VIB. Said catalyst is characterised in that it also comprises at least one organic compound selected from the alkene diols of formula (I) wherein R1 represents a C2-10 alkenylene group, preferably C2-4 alkenylene, a C6-18 arylene group, or a C7-18 alkylene-arylene group, and each R2 independently represents a hydrogen atom or a C1-18 alkyl group, a C1-18 alkenyl group, a C6-18 aryl group, a C3-8 cycloalkyl group, or a C7-20 alkylaryl or arylalkyl group, or the two groups R2 together form a divalent C2-18 group, the carbonated chain of the R2 groups containing or carrying at least one heteroatom selected from S, N and O. The invention also relates to a method for preparing one such catalyst, and to the use of said catalyst for hydrotreatment or hydroconversion.
摘要:
The invention relates to a method for the catalytic hydrotreatment of a load based on a diesel fuel oil and a biological load based on plant oils and/or animal fats in a hydrotreatment unit. The invention is characterised in that the hydrotreatment unit comprises at least one hydrotreatment reactor operating on a countercurrent. The invention also relates to a hydrotreatment unit for implementing said method, and a corresponding hydrorefining unit.
摘要:
918,703. Soldering wiring boards. WESTERN ELECTRIC CO. Inc. June 29, 1960 [July 1, 1959], No. 22714/60. Classes 83 (2) and 83 (4). In apparatus for soldering conductors on the underside of a wiring board, comprising a channel through which a constant stream of molten solder is maintained and a carriage for removably holding the board, means are provided to move the carriage to position the conductors in the stream of solder and for removing the board from the stream by a tilting action. A tank 10, Fig. 7, contains molten solder 11 which is pumped through a chamber 30 into a downwardly sloping channel 20 in a continuous stream, the tank being mounted below a carriage 36. The carriage has angle members 37, Fig. 4, engaged between rollers 38 on a cradle 39 so that the carriage may be moved longitudinally from the soldering position shown in solid lines in Fig. 1 to the unloading and loading position in broken lines and carries fixed holders 45 for one edge of the board and movable holders 48 operated by a lever 53 for the other edge. The cradle 39 comprises the roller carrying side members secured by a rod 61 whose outer ends extend through bearings in the ends 62 of arms 63 fixed to rocking members 72 pivoted on the main frame and rockable by an air cylinder 78 through linkages to move the cradle vertically. Blocks 64 mounted on the extreme ends of the rod 61 have guide rods 66 which extend through bushings 67 in the frame and move vertically therein during movement of the cradle. The cradle which carries counterbalance weights 70 has a shaft 90 carrying a cam follower 92 for engagement with two pairs of transversely spaced cams in a housing on the frame. One of the rear pair has a short surface to engage the follower in its up position and the other has a straight surface 98. One of the front pair has a fixed cam surface 102 while the other cam 104 is pivoted at 105 and is normally spring urged into an inoperative position by a spring 108. In operation with the carriage pulled forward to the loading position a soldered board is released by operating the lever 53 and a new board having components on one side with their leads engaging conductors on or partially embedded in the other surface, is held in place. The carriage is pushed to the soldering position where a switch 85 is engaged by the carriage to cause the cylinder 78 to lower the cradle. The cradle is lowered with the cam follower 92 engaging the surface 98 to position the board in the solder stream. When the cradle nears its lowermost position a lever 121 is actuated by a bracket 116 on the arm 63 to move the cam 104 to its operative position where it is held by a latch 107. A switch 88 is operated at the start of the soldering operation and causes after a timed period the reverse action of the cylinder 78 and the cradle is returned slowly against a dash pot with cam follower 92 engaging cam surfaces 102, 103. Initially the board is tilted to raise the front end, the solder washing the underside of the board to wipe out air pockets, and during the remainder of the upward travel the cradle is returned to its level position. Finally, the latch 107 is released and the cam 104 returns to its initial position.
摘要:
The invention relates to the use, in a hydrocarbon distillate with a boiling temperature of between 150 and 450° C. and a crystallization onset temperature as measured by Differential Calorimetric Analysis of greater than or equal to −50° C., preferably of −5° C. to +10° C., of a homopolymer obtained from an olefinic ester of carboxylic acid of 3 to 12 carbon atoms and from a fatty alcohol containing a chain of more than 16 carbon atoms and optionally an olefinic double bond, as a compound for revealing the efficiency of filterability additives based on copolymer and/or terpolymers of ethylene and of vinyl ester of a carboxylic acid of 3 to 12 carbon atoms, and of a monoalcohol containing 1 to 10 carbon atoms. The invention is also directed to an additive composition comprising a conventional hydrocarbon filterability additive in combination with an efficiency reveal additive, and also to the combustion fuels, motor fuel and oil fuel that comprise these additive combinations.
摘要:
The invention relates to a method of making a theremorevsible bituminous composition. The method includes transferring an additive to a bitumen to form a mixture, and stirring the mixture until its appearance is homogenous. The additive can be an organogelator with general formula R″—(COOH)z, where R″ is a linear or branched, saturated or unsaturated chain having 4 to 68 carbon atoms and z is an integer varying from 2 to 4. The bituminous composition is hard at the temperature of use without increasing its viscosity when hot.
摘要:
The invention relates to a process for hydrodeoxygenation (HDO) of pyrolysis oil and also to a process for upgrading of pyrolysis oil implementing said HDO process, and also to processing of the aqueous phase resulting from the HDO by steam pre-reforming and then steam reforming.
摘要:
A catalyst usable in hydrotreatment processes: an alumina-based amorphous support, phosphorus, a C1-C4 dialkyl succinate, acetic acid and a hydro-dehydrogenizing function of at least one group VIII element and at least one group VIB element, preferably made up of cobalt and molybdenum, a catalyst whose Raman spectrum comprises the most intense bands characteristic of the Keggin heteropolyanions (974 and/or 990 cm−1), C1-C4 dialkyl succinate and acetic acid (896 cm−1). Preferably, the dialkyl succinate concerned is dimethyl succinate and its main band is at 853 cm−1.
摘要:
The disclosure includes the use in a bituminous composition of an organogelator derivative which has a molar mass no higher than 2,000 g/mol and includes at least one hydrogen bonds donor D, at least one hydrogen bonds acceptor A and at least one compatibilizer agent C in the bitumen, the compatibilizer agent C including a group selected among: at least one straight hydrocarbon chain including at least 4 carbon atoms, or at least one aliphatic cycle of 3 to 8 atoms, or at least one aromatic cycle, or at least one aliphatic or partly aromatic, or even entirely aromatic, condensed polycyclic system, each cycle including 5 or 6 atoms taken alone or as a mixture, to improve the resistance to aggressive chemical agents, in particular to hydrocarbons, such as gasolines, diesels and/or kerosenes, excluding N,N′-ethylene bis(stearamide) and excluding fatty-chains polyamines obtained by reacting polyalkylene fatty-chains polyamines of general formula (I) R—NH—(CH2—CH2—CH2—NH)n—H wherein R is a linear hydrocarbon chain, saturated and/or unsaturated, of 8 to 22 carbon atoms, n being an integer from 1 to 5, with formic acid.