Catalyst for oxidation of carbon monoxide
(57) Abstract:The invention relates to the field of oil refining, in particular the catalysts for oxidation of carbon monoxide into carbon dioxide in the catalytic cracking processes. The catalyst contains 0,02 - 0,07% platinum, 0.2 to 16% of oxides of rare earth elements and up to 100% alumina. The catalyst has a high activity, which can reduce the temperature in the regeneration zone of the cracking catalyst. table 1. The invention relates to the refining, in particular to obtain a catalyst used in catalytic cracking processes for the oxidation of carbon monoxide in the volume of the regenerator.Effective and reliable way of afterburning of CO to CO2in the volume of the regenerator is the regeneration of cracking catalyst in the presence of promoting additives oxidation catalysts [1, 2] the Most effective catalyst for the oxidation of CO are the platinum group metals deposited on an inert carrier 
Well-known domestic catalysts for the oxidation of CO to CO2 manufactured under the brand names of KO-9, Oxiperm-2, OTF-1. Depending on the brand, the catalysts contain 0.05 to 0.08 wt. platinum and the remainder alumina. Katalysatoren is the catalyst CF-3  the company Duvison Chemical, containing 0.07 wt. plate, the rest of the aluminum oxide of high frequency with a specific surface area of 100 m2/,All known catalysts are prepared by impregnation of a microspherical alumina with a solution of a platinum compound.Lack of catalysts KO-9, Oxiperm, CP-3 is their low bulk density, which increases the consumption of the catalyst due to its ash from the system of the regenerator. A common shortcoming of all existing catalysts for the oxidation of CO to CO2is their high operating temperature. The required conversion of CO to CO2achieved in the regeneration zone at 600-660oC, which accelerates deterioration of the equipment, with a low content of coke on the cracking catalyst requires additional heat input, and reduces the activity and reduces the service life of the catalyst for cracking and oxidation.Closest to the proposed catalyst is the catalyst of OTF-1, containing technical alumina and 0.05 wt. platinum 
The purpose of the invention increase the oxidation activity of the catalyst.The aim is achieved in that the catalyst additionally contains oxides of rare earth elements (RSO) and has the following chemical composition, wt.Pt 0,02-0,07
The specified contrast allows you to increase the oxidation activity of the catalyst and reduce its temperature by 50 to 100oC.The catalyst is prepared by impregnation of technical grades of aluminium oxide G-OS (GOST 6912-87) or GUM (TU 48-0101-7/0-90) a solution containing platinum and rare earth elements (REE), followed by drying of the product or sequential impregnation of the support dissolution of the active components with intermediate and final drying of the product.For preparation of the impregnating solutions used cerium concentrate on WUT-6685-01-71 (solution of nitrates of rare-earth elements) and a solution of hexachloroplatinic acid containing 1.0 g/l of platinum.Example 1. In the mixer propitiating load of 200 g of dry alumina G-00 with a particle size of 0.05-0.10 mm and impregnated with stirring, 100 ml of a solution containing 0.1 g of Pt and 0.4 g of oxide of rare earth elements. The mass is stirred for 1-5 min, unloaded and dried in an oven at 120-140oC for 4-5 hGet the catalyst, wt.Pt 0,05
Example 3. The catalyst prepared according to example 1, but the impregnating solution contains 0.1 g of Pt and 3 g of oxides of rare earth elements.Get the catalyst, wt.Pt 0,05
Example 4. The catalyst prepared according to example 1, but the impregnating solution contains 0.04 g of Pt and 1.6 g of oxides of rare earth elements.Get the catalyst, wt.Pt 0.02
Example 5. The catalyst prepared according to example 1, but impregnating solution containing 0.14 g of Pt and 1.6 g of oxides of rare earth elements.Get the catalyst, wt.Pt 0,07
Example 6. The catalyst prepared according to example 1, but the impregnating solution contains 0.1 g Pt.Get the catalyst (the prototype), wt.Pt 0,06
Example 7. The catalyst prepared according to example 1, but the impregnating solution contains 1.5 grams of oxides of rare earth elements.Get the catalyst, wt.RSO 0,8
The catalysts according to examples which are of high oxidative activity of the proposed catalyst compared to the prototype. High oxidative activity is achieved due to the composition of the proposed catalyst, since the catalyst containing only platinum or RSO (examples 6 and 7) high activity do not possess. It should be noted that at 30% activity and above according to this method, almost complete afterburning of CO in the regeneration of cracking catalyst at industrial installations.The catalyst eliminates the above disadvantages of existing catalysts oxidized and significantly improve the efficiency of catalytic cracking. Catalyst for oxidation of carbon monoxide to dioxide containing platinum and alumina, characterized in that it further comprises the oxides of rare earth elements in the following ratio, wt.Platinum 0,02 0,07
The oxides of rare earth elements 0,2 1,5
The aluminum oxide To 100,
FIELD: gas treatment.
SUBSTANCE: invention relates to adsorption separation of gases and provides carbon dioxide absorbent, which is prepared by impregnating porous alumina with potassium carbonate, alumina having been preliminarily treated with alkali solution, in particular solution of alkali metal hydroxides and/or carbonates. Alkali treatment is carried out at temperature above 40оС. Method of removing carbon dioxide from gas mixture, including adsorption separation of carbon dioxide from atmospheric air in cyclic processes under thermal regeneration or short-cycle heating-free adsorption conditions, is characterized by that process is conducted at 20 to 200оС with above indicated absorber.
EFFECT: increased dynamic capacity of absorber and increased carbon dioxide absorption velocity.
5 cl, 2 dwg, 9 ex
FIELD: gas treatment.
SUBSTANCE: invention is intended for fine purification of gases with removal of carbon dioxide at elevated pressures, in particular in hydrogen or ammonia production processes. Absorbent is an aqueous solution containing N-methyldiethanolamine, piperazine, potassium carbonate, and morpholine. Invention achieves reduced equilibrium pressure and increased carbon dioxide absorption at low degrees of carbonization (as low as 0.1 mole CO2 per mole tertiary amine) without appreciable N-methyldiethanolamine degradation rate.
EFFECT: enhanced carbon dioxide absorption efficiency.
2 dwg, 6 tbl, 2 ex
FIELD: chemical refining of waste gasses.
SUBSTANCE: the invention is dealt with a method of purification of waste gasses of heating and power stations from carbon dioxide by introduction in the waste gas stream of products of incineration of hydrocarbon fuel of an alkaline solution. At that the alkaline solution is fed in a dispersed form into the upstream of the waste gasses moving in a turbulent mode in the space of the stalk of the heating and power station. In the capacity of the alkaline solution they use circulating water of ash removal of the heating and power station. A dispersed alkaline solution is fed into the base part of the stalk of the heating and power station. Before use of the circulating water of ash removal increase its alkalinity by mixing it with the ash from consequent separation of the solution and the ash residue by settling and filtration. At that alkali is extracted from ash into the water. The invention ensures increased completeness and speed of interaction of the components at the expense of use of energy of the purified stream of the waste gasses.
EFFECT: the invention ensures increased completeness and speed of interaction of the components due to use of energy of the purified stream of the waste gasses.
FIELD: gas treatment.
SUBSTANCE: catalyst contains alumina-supported palladium oxide, 0.80-2.54%, copper salt, 3.09-11.79%, promoter represented by phthalocyanine complex with iron or cobalt, 0.10-1.00%, and 0.50-3.00% of polyatomic alcohol.
EFFECT: enhanced efficiency of removing carbon monoxide as well as accompanying sulfur-containing impurities.
1 tbl, 21 ex
FIELD: gas treatment catalysts.
SUBSTANCE: catalyst preparation method comprises depositing initially liquid soda glass onto metallic or glass-cloth surface, after which transition metal oxide mixture is sputtered onto wet surface, said transition metal oxide mixture containing, wt %: chromium (III) oxide 18-35, manganese (IV) oxide 18-35, alumina - the rest; or cupric oxide 5-15, chromium (III) oxide 10-15, alumina - the rest; or cupric oxide 12-35 and alumina - the rest. Resulting coating is dried in air during 1 day and then molded through stepwise heat treatment to temperature 400°C, which temperature is maintained for 2-2.5 h.
EFFECT: prolonged lifetime at the same catalytic efficiency.