Process for the production of hydrocarbons

• US 5,324,335 A
• Filed: 04/13/1992
• Issued: 06/28/1994
• Est. Priority Date: 05/08/1986
• Status: Expired due to Term

• Current Assignee: Rentech, Inc.
• Original Assignee: Rentech, Inc.
• Inventors: Benham, Charles B., Yakobson, Dennis L., Bohn, Mark S.
• Primary Examiner(s): Howard, Jacqueline V.
• Application Number:
  US07/867,456
• Time in Patent Office: 806 Days
• Field of Search: 44/436, 44/451, 44/452, 518/703, 518/704
• US Class Current: 44/452
• CPC Class Codes: B01J 23/78 with alkali- or alkaline earth metals
• CPC Class Codes: B01J 35/40 characterised by dimensions, e.g. grain size in a colloidal state B01J35/23; crystallite size B01J35/77
• CPC Class Codes: B01J 37/031 Precipitation
• CPC Class Codes: B01J 37/04 Mixing B01J37/0009, B01J37/0018 take precedence
• CPC Class Codes: B01J 37/14 with gases containing free oxygen
• CPC Class Codes: B01J 37/18 with gases containing free hydrogen
• CPC Class Codes: C01B 2203/0233 the reforming step being a steam reforming step
• CPC Class Codes: C01B 2203/0238 the reforming step being a carbon dioxide reforming step
• CPC Class Codes: C01B 2203/025 containing a partial oxidation step
• CPC Class Codes: C01B 2203/0405 Purification by membrane separation
• CPC Class Codes: C01B 2203/0415 Purification by absorption in liquids
• CPC Class Codes: C01B 2203/043 Regenerative adsorption process in two or more beds, one for adsorption, the other for regeneration
• CPC Class Codes: C01B 2203/0475 the impurity being carbon dioxide
• CPC Class Codes: C01B 2203/062 Hydrocarbon production, e.g. Fischer-Tropsch process
• CPC Class Codes: C01B 2203/0822 the fuel containing hydrogen
• CPC Class Codes: C01B 2203/0827 at least part of the fuel being a recycle stream
• CPC Class Codes: C01B 2203/1217 Alcohols
• CPC Class Codes: C01B 2203/1241 Natural gas or methane
• CPC Class Codes: C01B 2203/127 Catalytic desulfurisation
• CPC Class Codes: C01B 2203/148 involving a recycle stream to the feed of the process for making hydrogen or synthesis gas
• CPC Class Codes: C01B 3/38 : using catalysts
• CPC Class Codes: C01B 3/52 : by contacting with liquids; Regeneration of used liquids C01B3/508 takes precedence
• CPC Class Codes: C10G 2/332 : of the iron-group
• CPC Class Codes: C10L 1/026 : for compression ignition
• CPC Class Codes: C10L 1/18 : containing oxygen
• CPC Class Codes: C10L 1/1824 : mono-hydroxy
• CPC Class Codes: C10L 10/02 : for reducing smoke development
• CPC Class Codes: F02B 3/06 : with compression ignition compression ignition engines using air or gas for blowing fuel into compressed air in cylinder F02B13/02
• CPC Class Codes: Y02P 20/10 : Process efficiency
• CPC Class Codes: Y02P 20/52 : using catalysts, e.g. selective catalysts

Abstract

An oxygen-containing diesel fuel additive for reducing particulate airborne emissions which additive is produced in a Fischer-Tropsch synthesis reaction using a promoted iron-based catalyst. The additive contains alcohols having at least five carbon atoms, and is employed in diesel fuel in an amount sufficient to provide an oxygen content in the diesel fuel of up to about 2% by weight while maintaining diesel fuel specification limits for viscosity.

Claims

1. An oxygen-containing diesel fuel additive for reducing particulate airborne emissions comprising a synthetic naptha or synthetic diesel composition or mixtures thereof produced by a Fischer-Tropsch synthesis reaction using a promoted iron-based catalyst and containing alcohols having at least five carbon atoms, produced in said synthesis reaction said additive being employed in diesel fuel in an amount sufficient to provide an oxygen content in the diesel fuel of up to about 2% by weight while maintaining diesel fuel specification limits for viscosity.