摘要:
A catalyst, which can be used in the Fischer-Tropsch process, and contains cobalt oxide having crystals with an average size ranging from 20 to 80 Å supported on an inert carrier of alumina. A preparation process for the catalyst and a Fischer-Tropsch process utilizing the catalyst are also provided.
摘要:
The preparation is described of a Fischer-Tropsch catalytic precursor based on cobalt supported on alumina, optionally containing up to 10% by weight of silica, which comprises: a) treatment of the alumina with a silicon compound selected from those having general formula (I) Si(OR)4-nR′n (I) wherein n ranges from 1 to 3 wherein R′ is selected from primary hydrocarbyl radicals having from 1 to 20 carbon atoms; wherein R is selected from primary hydrocarbyl radicals having from 1 to 6 carbon atoms; b) drying and subsequent calcination of the modified carrier obtained at the end of step (a) thus obtaining a silanized carrier; c) subsequent deposition of cobalt on the silanized carrier obtained at the end of step (b); d) drying and subsequent calcination of the supported cobalt obtained at the end of step (c) thus obtaining the final catalytic precursor; the above final catalytic precursor having a content of SiO2 deriving from the compound having general formula (I) ranging from 4.5 to 10% by weight.
摘要:
Process for preparing catalytic systems consisting of: a vanadium oxide; a bismuth oxide; and a carrier consisting of magnesium oxide, comprising: preparing of solutions based on derivatives of the components of the catalytic system; mixing the solutions and optional aging; drying the solution; first heating, in the presence of air, of the solid obtained from the drying at a temperature ranging from room value to a temperature of between 290 and 310° C., for a time ranging from 1 to 3 hours; additional heating, in the presence of air, of the solid for a time ranging from 2 to 4 hours at the calcination temperature ranging from 600 to 850° C.; calcination, in the presence of air, of the solid at a constant temperature, ranging from 600 to 850° C., reached in the additional heating, for a time ranging from 8 to 16 hours.
摘要:
Process for preparing activated charcoal by means of the thermal treatment of potassium humates or humic acids, deriving from coal oxidation, in the presence of an activating agent.
摘要:
Catalyst for steam cracking reactions consisting of pure mayenite having the general formula: 12CaO.7Al2O3 having an X-ray diffraction spectrum as indicated in Table I, obtained with a preparation process comprising the following steps: dissolution of salts containing calcium and aluminum with water; complexing of the dissolved salts by means of polyfunctional organic hydroxyacids; drying of the solution resulting from the completing in order to obtain a solid precursor product; calcination of the solid precursor product at a temperature ranging from 1300 to 1400° C. for at least two hours.
摘要:
A process for preparing activated charcoal having a high surface area is described, including a thermal treatment, in the presence of phosphoric acid, of regenerated humic acids.
摘要:
Catalytic system for the oxidative dehydrogenation of alkylaromatics (in particular ethylbenzene) or paraffins to the corresponding alkenylaromatics (in particular styrene) or to the corresponding olefins, consisting of: a vanadium oxide; a bismuth oxide; and a carrier based on magnesium, wherein the vanadium, expressed as V2O5, is in a quantity ranging from 1 to 15% by weight, preferably from 2 to 10%, the bismuth, expressed as Bi2O3, ranges from 2 to 30% by weight, preferably from 5 to 25% by weight, the complement to 100 being the carrier.
摘要翻译:将烷基芳族化合物(特别是乙苯)或链烷烃氧化脱氢至相应的烯基芳族化合物(特别是苯乙烯)或相应的烯烃的氧化脱氢催化体系,包括:氧化钒;氧化铋;和基于镁的载体,其中 以V 2 O 5表示的钒的量为1〜15重量%,优选为2〜10%,Bi 2 O 3表示的铋为2〜30重量%,优选为5〜25重量% ,补充100作为载体。