摘要:
A process for hydrotreating a hydrocarbon feed, comprising subjecting said feed to hydrotreating conditions in the presence of a catalyst comprising an essentially alumina-based extruded support, essentially constituted by a plurality of juxtaposed agglomerates, optionally at least one catalytic metal or a compound of a catalytic metal from group VIB (group 6 of the new periodic table notation) and/or optionally, at least one catalytic metal or a compound of a catalytic metal from group VIII (group 8, 9 and 10 of the new periodic table notation), in which the sum S of the group VIB and VIII metals, expressed as the oxides, is 0% to 50% by weight, and wherein each of these agglomerates is partly in the form of packs of flakes and partly in the form of needles, said needles being uniformly dispersed both about the packs of flakes and between the flakes, in which the alumina agglomerates are obtained by forming a starting alumina originating from rapid dehydration of hydrargillite and in which the amount of alumina from boehmite decomposition is 5% to 70% by weight.
摘要:
The present invention relates to a process and a device for manufacturing synthesis gas. The reactor according to the invention comprises within a single housing: A non catalytic combustion chamber (1) comprising at least one device (2) for injecting a fuel and at least one device (3) for injecting an oxidizer so as to achieve a partial combustion in said chamber, and at least one catalytic bed (4) which the gases coming from combustion chamber (1) run into, and also comprising at least one device (6) for injecting an additional oxidizer. The reactor and the process according to the invention may be applied to any chemical manufacturing utilizing synthesis gas, such as the manufacturing of ammonia, urea, methanol, higher hydrocarbons, etc.
摘要:
A process for sweetening a petroleum cut containing mercaptans, wherein said petroleum cut is subjected to oxidation conditions by its being passed in the presence of air in contact with a porous catalyst said process being characterized in that said catalyst comprises 10 to 98% by weight of at least one mineral solid phase constituted of analkaline aluminosilicate with a Si/Al atomic ratio less than or equal to 5, 1 to 60% by weight of active carbon, 0.02 to 2% by weight of at least one metal chelate and 0 to 20% by weight of at least one organic or mineral binding agent, has a basicity determined according to the 2896 ASTM standard with 20 milli-equivalents of potash per gram and a total BET surface area of 10 m.sup.2 g.sup.-1, and contains inside its pore structure a permanent aqueous phase representing 0.1 to 40% by weight of dry catalyst.
摘要:
A reactor for manufacturing synthesis gas as a single housing, equipped with a non-catalytic combustion chamber having at least one device for injecting a fuel and at least one device for injecting an oxidizer so as to achieve partial combustion in said chamber, and at least one catalytic bed from which the gases coming from the combustion chamber discharge into, said catalytic bed being equipped with at least one device for injecting an additional oxidizer. A process for operating the reactor may be applied to any chemical manufacturing utilizing synthesis gas, such as the manufacturing of ammonia, urea, methanol, higher hydrocarbons, etc.
摘要:
The invention concerns a process for the elimination of mercury from hydrocarbons by passage of the feedstock with hydrogen over a catalyst then bringing the product obtained into contact with a mercury retention bed, the catalyst comprising at least one element selected from the group constituted by iron, nickel, cobalt, molybdenum, tungsten, palladium, wherein at least 5% is in the sulphide state. Any arsenic present in the feedstock is also eliminated.In accordance with the invention, the catalyst is simultaneously presulphurated and reduced.The invention results in a considerable reduction in operation period and high retention efficiency at temperatures between 120.degree. C. and 250.degree. C. and in the presence of 0-1000 mg of sulphur/kg of feed.
摘要:
For removing mercury and any arsenic in hydrocarbon charges containing mercury and sulfur, the charge is contacted with an arsenic collecting material having catalytic properties ("catalyst") in hydrogen, the material containing at least one metal selected from the group consisting of nickel, cobalt, iron, palladium, and platinum; at least one metal selected from the group consisting of chromium, molybdenum, tungsten, and uranium; and an active phase carrier. Downstream of the catalyst or mixed therewith is a mercury collecting material containing a sulfide of at least one metal selected from the group consisting of copper, iron, and silver or sulfur, and an active phase carrier.
摘要:
A gas containing carbon oxysulfide or carbon disulfide is passed in admixture with oxygen through a catalyst formed of a carrier, vanadium oxide and silver, the proportion of iron oxide, if any, being lower than 1% by weight. The amount of vanadium oxide may be 0.5 to 10% by weight and that of silver 0.05 to 4% by weight.
摘要:
Catalyst for the decomposition of nitrogen oxides, particularly for use in catalytic exhaust boxes in view of decomposing the nitrogen oxides contained in the exhaust gases from internal combustion engines, comprising, deposited on a carrier, from 3 to 20% of an active phase of the formula Ni.sub.x (Fe.sub.y Cr.sub.z)O.sub.t, in which x has a value from 0.5 to 1.5, y + z a value from 1.5 to 3, the ratio ##EQU1## A VALUE FROM 0.01 TO 0.9 AND T A VALUE LOWER THAN 10.
摘要:
The invention relates to a personal weapon, intended for semi-automatic and automatic firing of caseless ammunitions, provided with an electronic fire controller with biometric identification of the person firing. The weapon has a sealing device for the chamber based on using segments or corollas with variation of bore size mechanically or with gas pressure. A delay in opening the barrel/breech unit may be introduced using spigots driven by propellant gases. A device for sequencing compartments in tandem of the magazine uses the volume reduction of ammunition to double the power of the firearm. A removable locker permits the integral locking of breech unit, trigger, magazine and dismantling bolt for an absolute weapon safety. A telescopic extension device for the barrel increases the power of the ammunition and a gas bleed in the chamber permits the stabilisation of the firing.
摘要:
A process is described for synthetizing hydrocarbons from a mixture comprising carbon monoxide and hydrogen in the presence of a catalyst comprising at least one group VIII metal supported on a silica-alumina prepared by co-precipitating and calcining at a temperature in the range from about 500° C. to about 1200° C. for at least 6 hours such that said silica-alumina has a specific surface area of less than 260 m2/g. Said catalyst is used in a fixed bed or in suspension in a liquid phase of a three-phase reactor.