摘要:
A process for manufacturing a mixture of saturated primary alcohols by reacting carbon oxides with hydrogen in the presence of a catalyst formed essentially of the following elements: copper, cobalt, zinc, at least one metal A selected from the group consisting of alkali and alkaline earth metals and optionally zirconium and/or at least one metal M selected from the group formed of scandium, yttrium and rare earth metals and/or at least one metal N selected from group VIII noble metals, the proportion by weight of each metal element being: copper: 15-55%, colbalt: 5-25%, zinc: 15-70%, metal A: 0.01-5%, zinconium: 0-55%, metal M: 0-20%, metal N: 0-1%, the total amount by weight of zinc and zirconium in percent by weight of all the metals being from 15 to 70% and the atomic ratios between these metals being: Cu/Co: 0.2:1 to 5:1 and Zn/(Zn+Zr): 0.05:1 to 1:1 and (Zn+Zr)/Co: 0.5:1 to 8:1.The catalyst may be prepared by complexing or by coprecipitating catalytic elements.
摘要:
The invention concerns a process for converting a stream of natural or associated gas into liquid fractions, comprising: a) a step for converting said stream of gas into a synthesis gas SG; b) a step FT for Fischer-Tropsch synthesis to convert the SG into liquid fractions; c) a step for fractionating the effluents from the Fischer-Tropsch synthesis into at least one relatively heavy fraction comprising waxes with a boiling point of 565° C. or more and at least one relatively light fraction; d) a step HCKI for isomerization hydrocracking of the relatively heavy fraction, in which at least 75% by weight of the fraction of the feed with a boiling point of more than 565° C. is converted into compounds boiling below 565° C.; e) at least one step for mixing at least the effluents from step HCKI (step d)), the light fraction from step c) and a crude oil P, to thereby produce an oil P*.
摘要:
The invention concerns the preparation of a catalyst comprising a support comprising at least one oxide of the element Si, Al, Ti, Zr, Sn, Zn, Mg or Ln (where Ln is a rare earth), cobalt, titanium, at least one element A selected from the group formed by copper, ruthenium, platinum, palladium, scandium and yttrium, and characterized in that it comprises at least the following successive steps: (1) forming a precursor comprising at least cobalt, element A and the support; (2) at least partial reduction of said precursor in the presence of at least one reducing compound; and (3) depositing titanium on the reduced precursor. The invention also concerns the catalyst which can be produced using this process and the use of the catalyst in a process for synthesizing C.sub.5.sup.+ hydrocarbons from synthesis gas.
摘要:
The invention concerns the preparation of a catalyst comprising a support containing at least one oxide of the element Si, Al, Ti, Zr, Sn, Zn, Mg or Ln (where Ln is a rare earth), cobalt, at least one element A selected from the group formed by ruthenium, platinum, palladium and uranium, and at least one element B selected from the group formed by molybdenum and tungsten, characterized in that it comprises at least the following successive steps: (1) formation of a precursor comprising at least cobalt and at least a portion of the support; (2) at least partial reduction of the precursor in the presence of at least one reducing compound; and (3) deposition of any part of compound present in the catalyst and not present in the precursor on the reduced precursor. The invention also concerns the use of the catalyst in a process for the synthesis of C.sub.5.sup.+ hydrocarbons from synthesis gas.
摘要:
Process for producing olefins from natural gas, the natural gas (2) is mainly fractionated (1) into methane (3) and higher hydrocarbons (4), the latter being then mainly fractionated (17, 20) into propane (9) and ethane (7). The methane (3), admixed with oxygen (6), passes through an oxidation reactor (5), receives the ethane (7) and the obtained mixture passes through a pyrolysis reactor (8). The effluent coming out of reactor (8) receives the propane (9) and the obtained mixture passes through a pyrolysis reactor (10). A hydrocarbon flow comprising olefins (12), more particularly ethylene and propene, is recovered.
摘要:
Process for producing olefins from natural gas. The natural gas is fractionated (1). The methane (3) mixed with oxygen (6) crosses the oxidizing reactor (5), receives the C.sub.2 + hydrocarbons (7) and the mixture crosses the pyrolysis reactor (8). A hydrocarbons flow containing olefins (10) is collected.
摘要:
Manufacture of catalysts containing at least four essential metals: copper, zinc, aluminum and at least one metal selected from the group formed of rare earths and zirconium.The process comprises the formation of a crystallized precipitate of the above-mentioned metals by intimate mixture of a crystallized precipitate of copper, zinc and aluminum, containing less than 0.06% by weight of sodium after washing, with a precipitate of at least one metal of the rare earths group and/or zirconium, containing less than 3% of nitrogen after washing.The catalysts are used in balanced reactions involving alcohols and synthesis gases, and particularly for methanol synthesis.
摘要:
The invention concerns the preparation of a catalyst comprising a support comprising at least one oxide of the element Si, Al, Ti, Zr, Sn, Zn, Mg or Ln (where Ln is a rare earth), cobalt, titanium, at least one element A selected from the group formed by copper, ruthenium, platinum, palladium, scandium and yttrium, and characterized in that it comprises at least the following successive steps: (1) forming a precursor comprising at least cobalt, element A and the support; (2) at least partial reduction of said precursor in the presence of at least one reducing compound; and (3) depositing titanium on the reduced precursor. The invention also concerns the catalyst which can be produced using this process and the use of the catalyst in a process for synthesising C5+ hydrocarbons from synthesis gas.
摘要:
A process for the preparation of essentially linear and saturated hydrocarbons from natural gas (1), comprising the following successive steps, the order of steps (b) and (c) being exchangeable or said steps being capable of being conducted simultaneously: (a) producing (6) synthesis gas (7) by treatment of said gas, (b) mixing an effluent comprising at least the synthesis gas (7) obtained from the preceding step and an effluent (4) comprising mainly C.sub.2 -C.sub.4 hydrocarbons, (c) cooling an effluent comprising at least the mixture obtained from the preceding step, (d) transforming the effluent (8) obtained from step (c) in a cracking zone (10), (e) separating (12) the effluent obtained at step (d) into an effluent comprising mainly water (13) and an anhydrous effluent (14), and (f) transforming (15) the effluent obtained from step (e) (14) by a Fischer-Tropsch synthesis.
摘要:
The invention concerns steps in a process for the synthesis of at least one alkyl tertiobutyl ether, preferably respectively MTBE or ETBE, from at least one alcohol and from isobutene, each synthesized at least partially from natural gas. The alcohol, preferably methanol or ethanol respectively, is synthesized at least partially from synthesis gas, a portion of said synthesis gas being prepared in a natural gas steam prereforming zone. The isobutene is synthesized in a series of processes which includes direct transformation of natural gas to ethylene, known as oxidative coupling of methane (OCM), dimerisation of ethylene to normal butene, isomerisation of n-butene to isobutene, and the separation units associated therewith.