摘要:
The hydroconversion of a heavy hydrocarbon charge containing asphaltenes and metal, sulfur and nitrogen impurities is performed in the presence of a catalyst comprising:(a) soot particles of the cenosphere type(b) a compound of a metal selected from the groups V B, VI B, VII B and VIII of the periodic classification.
摘要:
A steam-cracking process with a very high degree of severity of a feedstock that comprises at least 20% by weight of hydrocarbons of the group that is formed by ethane and propane in which the feedstock that is diluted with water vapor is circulated in the radiation zone of a furnace, in at least one pipe with a length L≧14 m and a hydraulic diameter that is greater than or equal to 34 mm in the end portion of the pipe at least, is described under the following conditions of dwell time &tgr; and furnace output temperature COT: 120 ms≦&tgr;≦2800 ms and 858° C.≦COT≦1025° C. to obtain a conversion of at least 77% of ethane of the feedstock if the feedstock contains ethane and/or a conversion of at least 96% of the propane of the feedstock if the feedstock contains propane, and to maintain this conversion for a cycle time that is greater than or equal to about 8 days.
摘要:
Described in a process for hydrotreating (HDT) a petroleum feedstock (1) that contains sulfur and nitrogen are the catalytic cracking of the ammonia, produced by the hydrotreating process, in a catalytic cracking furnace (F), the cooling (E2) and separating of the cracking effluent to produce an H.sub.2 S containing gas phase, the extraction of the hydrogen sulfide from said gas phase and from the hydrotreating purge gas in an amine washing unit (20), and the separation (SM) of the hydrogen from the resultant effluent. The recovered hydrogen is recycled to hydrotreating unit (HDT) via a pipe (17).
摘要:
A process for converting liquid or semi-liquid hydrocarbon charges to lighter fractions comprises a first step (a) heating droplets jets of the charge introduced into a pyrolysis chamber by surrounding them with parallel jets of hot solid particles, of relatively large size, of a heat carrier material, not substantially in contact with the droplet jets, so as to maintain a temperature of 700.degree.-1600.degree. C., and introducing a gas so as to obtain a pressure from 1 to 150 bars. A second step involves (b) separating the gaseous fraction from the solid particles. Thereafter (c) at least a portion of the solid particles are heated and fed back to step (a). The gaseous fraction is (d) cooled by means of a cold gas so as to recover light hydrocarbons therefrom.
摘要:
A process for the thermal pyrolysis of hydrocarbons in a reactor (1) of elongate shape comprising at a first end supply means (5) for a gaseous mixture containing at least one hydrocarbon, at the opposite end discharge means (10) for the effluents produced and between these two ends supply means (9) for effluent cooling fluid, the reactor comprising in a first part (first end side) a plurality of electric heating means (3) enclosed by casings (4) disposed in substantially mutually parallel layers perpendicular to the axis of the reactor, in such a way as to define between the casings and/or the casings and the walls (22), spaces or passages for circulation of the gaseous mixtures and/or effluents. The heating means heat the passages in successive, individual, transverse sections which are substantially perpendicular to the axis of the reactor. The reactor comprises means for introducing into the casings (4) a gas G known as a casing gas which preferably contains water vapour and/or hydrogen. The permeability of the casings is sufficient to permit diffusion, at least at certain points, of at least a part of the gas G from inside the casings to the outside of the casings, the gas G then being diluted in the gaseous mixture.
摘要:
An oxidation reactor having elongated shape includes in combination, a mixing member including a pipe for feeding oxidizing gas and a pipe for feeding oxidizable charge; a reaction member, arranged subjacent the mixing member, and a discharge member associated with a discharge pipe for the products of the reaction. The reaction member includes a central zone which has a first lining and the reactor includes at least one peripheral zone which has a second lining, passages in the second lining being smaller than passages in the first lining so that the pressure loss in the second lining is greater than that of the first lining. The second lining forms a sleeve surround the first lining and this sleeve is formed of at least one refractory heat insulating material. The oxidation reactor is provided with an external sleeve steel jacket, a concrete wall and a steel element surrounding the mixing member arranged above the reaction member. The reaction member includes a series of single elements which form juxtaposed channels.
摘要:
Method and apparatus for thermal conversion of methane to hydrocarbons of higher molecular weight, comprising a reactor 1 of elongated shape, connected at a first end to means 5 for supplying gas mixture containing methane (process gas), and connected at the opposite end to discharge means 10, the reactor having a plurality of electric heating means 3 surrounded by sheaths 4 over a first part (towards the first end). The heating means, which are substantially parallel, are arranged in sheets which are substantially parallel and perpendicular to the axis of the reactor, so that spaces or passages for circulation of the process gas and/or effluent are defined between the sheaths and/or between the sheaths and the walls 22 separating two consecutive sheets. The heating means are adapted to heat the passages by successive independent cross sections substantially perpendicular to the axis of the reactor. In a second part 8 (towards the opposite end) adjoining the first part, the reactor further comprises means 9 for cooling the effluent, connected to the means for supplying cooling fluid. The reactor also has means for introducing a gas containing hydrogen into the space surrounding the heating means inside the sheaths 4, at an appropriate pressure. The reactor and particularly the sheaths 4 are designed so that hydrogen is diffused from inside the sheaths to outside them and can then be diluted in the process gas.
摘要:
The invention relates to an improved hydrocarbon steam-cracking method intended to produce more particularly ethylene and propylene.The method is based on the utilization of a multi-channel system made of ceramic material, in which the charge and heat exchange fluids or refrigerants alternatively pass through the channels or rows of channels constituting the continuous assembly comprising a pyrolysis zone followed by a quenching zone.The method according to the invention is applicable to charges ranging from ethane to vacuum gas oils.
摘要:
A process for producing methylacetylene and propadiene in a reaction zone which is elongate in one direction (one axis) comprises a heating zone and a cooling zone following said heating zone, in which a gas mixture comprising at least one hydrocarbon containing at least three carbon atoms e.g. propane and/or propylene from stream cracking, and at least one diluent is circulated in the heating zone, under super-atmospheric pressure, in a flow direction substantially parallel to the direction (to the axis) of the heating zone, wherein the heating zone comprises at least one preheating zone in which the temperature of said gas mixture increases by about 50° C. to 120° C. per {fraction (1/10)} of the length of the heating zone, at least one pyrolysis zone for the feed in which the temperature rises by about 20° C. to 50° C. per {fraction (1/10)} of the length of the heating zone and at least one methylacetylene-propadiene formation zone in which the temperature climbs by about 70° C. to 150° C. per {fraction (1/10)} of the length of the heating zone, the products formed at the end of the heating zone being cooled in the cooling zone then recovered at the of the reaction zone.
摘要:
A process for the pyrolysis of hydrocarbons in a reactor with at least two rows which are parallel to each other in which at least one row is supplied with a non hydrocarbon fluid containing steam to decoke the reaction zone at least in part. At least one other row is supplied with a gaseous mixture containing at least one hydrocarbon and water, to pyrolyze said mixture.