TH3469B - Process for preparing hydrocarbons - Google Patents

Abstract

C+5 hydrocarbons are prepared from C-4 hydrocarbons by a two-step process consisting of steam reforming. This was followed by a Fisser-Tropsch synthesis on a special catalyst. with cobalt The gaseous fractions containing unmodified H2 and CO and C-4 hydrocarbons and COP2 formed as by-products are separated from the product. synthesized and circulated back into the reformer by steam

Claims (1)

1. Process for the preparation of C+5 hydrocarbons from One or more C-4 hydrocarbons that share the characteristics that in the first step, C-4 hydrocarbons are converted by Reformed by steam to a mixture of carbon monoxide and hydrogen, which is subsequently converted to a The second to hydrocarbon mixtures composed mainly of C+5 hydrocarbons by exposure of the first step mixture to catalysts containing 3-60 parts by weight of cobalt. and at least other metals One species selected from a group containing 0.1-100 parts by weight of zirconium, titanium, ruthenium and chromium per 100 parts by weight of silica, alumina, or silica-alumina. high temperature and pressure which catalysts were prepared by Massage and/or diffusion and which is led to a reduction process, in which the reaction products of the second stage are divided into gaseous fractions mainly composed of hydrogen and Unmodified carbon monoxide C-4 hydrocarbons that Occurs in the form of by-products and the resulting carbon dioxide formed in the form of by-products and the liquid part mostly with C+5 hydrocarbons and water which is at least some The fraction takes place as a by-product in the second stage, where the gaseous portion which has removed hydrogen is recirculated back into the first stage and where excess hydrogen is produced. It is formed in the first step and the steam is separated. 2. The process as claimed in Claim 1 shows that the process applies to where C-4 hydrocarbons are composed mainly of methane 3. The process as claimed in Claim 2 that characterizes that the process applies to natural gas as a feedstock 4. The process as claimed in one of the claims Claims 1 - 3 that feature that first step It is performed at 700 - 1000°C, 2 - 25 bar pressure and a steam/hydrocarbon ratio of 1.5 - 5 g mol/C H2O 1 g atom and using nickel-containing catalysts. that holds the right to any of the rights Claims 1 - 3 that feature that step Second, the corresponding catalyst (3-4R)>L/S > (D.3 + 0.4R) is used where L = total amount of cobalt present on the catalyst shown. in milligrams of Co/ml of catalyst S = surface area of catalyst displayed as a table m/mL of catalyst and R = volume weight ratio by cobalt settled on kneading support to the total amount of cobalt available on the catalyst. Claims 1-5 characterize that in the second step, a catalyst containing 15-50 parts by weight of cobalt and another metal 0.1- 5 parts by weight if during Prepare cobalt to bind first and then with another metal. or there is another metal 5 -40 by weight if in Prepare another metal binding first and then add cobalt per 100 parts by weight of the substrate. Claims 1-6 characterizes that in step two, zirconium-containing catalysts are used as another metal. and silica as a backing agent. Claims 1-7 expressing the characteristics that in step The second is to be performed at 125-350 °C and at a pressure of 5-100 bar. Claims 1-8 expressing the feature that the dehumidification It is done by cooling and the removal of hydrogen is done by Separation by membrane or by pressure change adsorption 1 0. The process as claimed by one of the Claims 1-9 showing the feature of dehumidification It is performed only/after the second step and that rooting. The hydrogen out will proceed from the gas/liquid separator after the second step 1. 1. C+5 hydrocarbons prepared according to the aforementioned process at has held the right to one of the claims 1-11 (11 claims, 3 pages, 0 pictures)