Classifications

• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
  • C07C6/00—Preparation of hydrocarbons from hydrocarbons containing a different number of carbon atoms by redistribution reactions
  • C07C6/02—Metathesis reactions at an unsaturated carbon-to-carbon bond
  • C07C6/04—Metathesis reactions at an unsaturated carbon-to-carbon bond at a carbon-to-carbon double bond
• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
  • C07C1/00—Preparation of hydrocarbons from one or more compounds, none of them being a hydrocarbon
  • C07C1/02—Preparation of hydrocarbons from one or more compounds, none of them being a hydrocarbon from oxides of a carbon
  • C07C1/04—Preparation of hydrocarbons from one or more compounds, none of them being a hydrocarbon from oxides of a carbon from carbon monoxide with hydrogen
  • C07C1/0485—Set-up of reactors or accessories; Multi-step processes
• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
  • C07C2523/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group C07C2521/00
  • C07C2523/16—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group C07C2521/00 of arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium
  • C07C2523/24—Chromium, molybdenum or tungsten
  • C07C2523/28—Molybdenum
• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
  • C07C2523/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group C07C2521/00
  • C07C2523/16—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group C07C2521/00 of arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium
  • C07C2523/24—Chromium, molybdenum or tungsten
  • C07C2523/30—Tungsten

Definitions

• This invention relates to a high temperature metathesis process.
• the invention relates to the optimisation of the high temperature metathesis process to improve selectivity for a desired product range.
• olefins in the Cg to C 14 range may be used as detergent and plasticizer precursors as well as for alkylation of benzene, and that C15 to C18 olefin ranges may be used as drilling fluids and drilling fluid precursors, amongst other uses.
• linear olefins may be used to produce linear alkyl benzene and linear oxo-alcohols which could be used to produce detergents and plasticizers which were believed to be both bio-degradable and suitable for their intended purpose.
• linear oxo-alcohols and lineal alkyl benzene were used to produce detergents and plasticizers which were believed to be both bio-degradable and suitable for their intended purpose.
• metathesis process for the metathesis of Fischer-Tropsch olefins in the C 5 to C 15 range, said metathesis process including the step of
• olefin feedstock in the C5 to C 1 5 range to metathesis reaction conditions, said olefin feedstock including mono-methyl branched olefins.
• the high temperature metathesis process may be carried out at a
• the high temperature metathesis process is carried out at a
• the operating pressure of the high temperature metathesis process may be between 1 and 30 bar, or even higher.
• the high temperature metathesis process may use a tungsten or molybdenum based catalyst, for example, WO3 or M0O3, supported or unsupported, with or without co-catalysts.
• the support can typically be SiO 2 , AI2O3, ZrO 2 , TiO 2 , or mixtures thereof.
• the high temperature metathesis process Fischer-Tropsch olefinic feedstock in the C 5 to C 15 range may include linear alpha olefins, mono-methyl branched olefins, paraffins, dienes, aromatics, and the like.
• the Fischer-Tropsch olefinic feedstock includes one or more olefins selected from the C5 to Cg range.
• the product of the high temperature metathesis process may include one or more mono-methyl branched olefins in the Cg to C 1 8 range.
• the product of the high temperature metathesis process may include one or more linear olefins in the Cg to C ⁇ s range.
• the product of the high temperature metathesis process may include one or more mono-methyl branched olefins and one or more linear olefins in the Cg to C 18 range.
• the olefins of the product may be internal olefins.
• the product of the high temperature metathesis process may be used in the production of alkyl benzene, plasticizers, detergents, drilling fluids, and the like, having both a linear fraction and a branched fraction (for alkyl benzene the alkyl chain is branched or linear).
• the branched fraction will be mono-methyl branched.
• the branching may be di-methyl and/or ethyl.
• a high temperature metathesis process for the metathesis of olefins in the C5 to C15 range including the step of subjecting an olefinic feedstock in the C5 to C 15 range to metathesis reaction conditions, the process including the recycling of a part of the product of the metathesis reaction to the reaction to increase the selectivity for a desired product range.
• the olefinic feedstock may be a Fischer-Tropsch olefinic feedstock including mono-methyl branched olefins.
• the olefinic feedstock includes one or more olefins in the C5 to Cg range.
• the process includes a separation stage wherein a recycle fraction in the C5 to C 8 range is separated from the product and recycled to the reaction.
• the quantity of recycle in the feedstock may be selected to provide a C9 and higher selectivity of above 50%.
• the quantity of recycle in the feedstock is selected to provide a Cg and higher selectivity of above 50%.
• the recycle makes up between 20% and 80% of the reaction feedstock.
• the recycle makes up between about a third and three quarters of the reaction feedstock.
• the total yield of high temperature metathesis process product in the Cg to Ci8 range is above 40%.
• the total yield of high temperature metathesis process product in the Cg to C ⁇ s range is about 50%.
• the total feedstock conversion of the high temperature metathesis process of the invention is typically in the range of 60% to 90%, usually about 80%.
• the ratio of linear to branched high temperature metathesis process products is typically greater than 1 :1. Usually, the ratio of linear to branched high temperature metathesis process products is greater than 2:1.
• the ratio of linear to branched high temperature metathesis process products is about 3: 1.
• the branching of the high temperature metathesis process products is predominantly mono-methyl branching, although some di-methyl, and/or ethyl branching may also be present.
• the product of the high temperature metathesis process may be used in the production of alkyl benzene, plasticizers, detergents, drilling fluids, and the like, having both a linear fraction and a branched fraction (for alkyl benzene the alkyl chain is branched or linear), the ratio of linear to branched fractions being related to the ratio of linear to branched high temperature
• reference numeral 10 generally indicates a high
• the process 10 includes a reactor 12 operated at between 450°C and 550°C and at an operating pressure of between 1 and 30 bar.
• the feedstock 14 includes olefins in the C5 to Cg range.
• the feedstock 14 will be purified of oxygenates which may poison the catalyst by extractive distillation (not shown), prior to being fed to the reactor 12.
• the reaction product 16 includes both linear and branched internal
• the reaction product 16 is fed to a separator 18 where it is cut into a
• the recycle stream 22 is combined with the feedstock 14 to form the total feedstock of the reactor 12.
• the recycle stream 22 is between a third and three quarters of the feedstock 14.
• the total yield of heavy product stream 24 is about 50%, while the
• feedstream 14 conversion is about 80%, with a selectivity for Cg to C 1 8 of
• the ratio of linear to branched product in heavy product stream 24 is about 3:1
• the catalyst was activated by heating at 550°C in flowing air for 12

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• Organic Chemistry (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Engineering & Computer Science (AREA)
• General Chemical & Material Sciences (AREA)
• Oil, Petroleum & Natural Gas (AREA)
• Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
• Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)

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• 2000
  • 2000-07-06 AU AU65412/00A patent/AU6541200A/en not_active Abandoned
  • 2000-07-06 JP JP2001507769A patent/JP2003524682A/ja active Pending
  • 2000-07-06 EP EP00952771A patent/EP1196361A1/de not_active Withdrawn
  • 2000-07-06 WO PCT/ZA2000/000120 patent/WO2001002324A1/en active Application Filing

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