The method of preparation of the catalyst for purification of olefins from carbon monoxide

 

(57) Abstract:

Usage: in the methods of preparation of the catalyst for purification of olefins from carbon monoxide. The proposed method for menominees catalyst is that when using the method of preparation menominees catalyst by mixing a solution of ammonium carbonate complex copper compound of magnesium with a subsequent heat treatment, as compounds of magnesium is used activated by treatment with an aqueous solution of ammonia by heating magnesium oxide. table 1.

The invention relates to methods of making catalysts, in particular Menominee catalysts for purification of olefins and can be used in the chemical and petrochemical industries.

Known [1] a method of obtaining menominees catalyst deposition from solutions of copper salts and magnesium alkali solution followed by heat treatment sludge. This method allows to obtain a highly active catalyst. The magnitude of the sorption capacity in the process of purification of ethylene at 150aboutWith was 50 l WITH/kg of catalyst. The disadvantage of this method of preparation of the catalyst is the large number of stones ammonia-carbonate complex of copper and a suspension of magnesium oxide at elevated temperature followed by heat treatment sludge.

The advantage of this method is the lack of wastewater and gas emissions. But the catalyst has a lower sorption capacity and poor reproducibility of properties with multiple receive.

Closest to the claimed method is the preparation of the catalyst by mixing at 75-93aboutWith solutions of ammonium carbonate complex of copper and magnesium bicarbonate followed tarmoola - processing sludge [2]. This method allows to obtain a catalyst with a high sorption capacity, 49-52 l WITH/kg of catalyst a good reproducibility of properties with multiple receive. The disadvantage of this method is hampering its industrial implementation is the low solubility of magnesium bicarbonate and, a consequence, large volumes of the fluids used, which requires the use of complex large-sized equipment.

The aim of the invention is to obtain menominees catalyst for olefins purification process from carbon monoxide with high sorption capacity and good reproducibility of the sorption properties with multiple cooking using simple technology.

For the preparation of the catalyst used method of mixing ammonium carb is I by pre-activation of magnesium oxide by treatment with an aqueous solution of ammonia when heated.

The proposed method of preparation menominees catalyst has a significant difference from the known, which consists in the fact that magnesium oxide before mixing with the ammonia-carbonate complex of copper, undergoes activation and activation is carried out by processing of magnesium oxide with an aqueous solution of ammonia when heated.

The use of a suspension of activated magnesium oxide is provided by the formation of compound required phase composition and, as a result, a catalyst with high activity and reproducibility.

P R I m e R 1. The catalyst composition of siof 0.85Mgof 0.15O prepared as follows.

In the reaction apparatus equipped with a stirrer and heating load of 0.9 l of 2% ammonia solution and 80.6 g of magnesium oxide. The suspension is heated with stirring at 60aboutC for 1 h Then the suspension is added 6.0 liters (120 g copper/l) solution of ammonium carbonate complex of copper. The suspension is heated to 93aboutWith and lead the process with continuous stirring, and continuously removing gases at 93aboutTo complete decomposition of ammonia-carbonate complex of copper. The formed precipitate is filtered off, dried at a prepared analogously to example 1 to demonstrate the reproducibility of properties with multiple receive.

P R I m m e R 2. The catalyst composition of si0,98Mg0,02O prepared analogously to example 1, but of 10.25 g of magnesium oxide suspension in 120 ml of 5% ammonia solution and add 6,6 l (120 g C/l) ammonia-carbonate complex.

P R I m e R 3. The catalyst composition Cu0,5Mg0,5O prepared analogously to example 1, but 335,1 g of magnesium oxide suspension 3.8 l of 2% ammonia solution and add a 4.4 l (120 g Cu/l) solution of ammonium carbonate complex of copper. The temperature of annealing 380aboutC.

P R I m e R 4. The catalyst composition of si0,55Mgof 0.15O prepared analogously to example 1, but the decomposition temperature of the mixture of ammonium carbonate complex of copper and a suspension of magnesium oxide 75aboutC.

P R I m e R 5. The catalyst composition Cuof 0.85Mgof 0.15O prepared analogously to example 1, but a suspension of magnesium oxide is heated at 90aboutC for 30 minutes

P R I m e R 6. The catalyst composition Cu0,55Mgof 0.15O prepared analogously to example 1, but magnesium oxide suspension in 0.9 l of 10% ammonia solution.

P R I m e R 7 (well-known). Composition Cuof 0.85Mgof 0.15O.

In the apparatus, equipped with a stirrer and heated, continuously served the solutions containing copper and magnesium. Take 6,0 l (120 g Cu/l) speeds ensuring the formation of a catalyst of a given composition. The process is conducted at 93aboutC. the Resulting suspension is continuously filtered. The precipitate is dried at 100aboutC for 10 h and calcined at 350aboutC for 4 h

The catalysts are experiencing in the process of purification of ethylene from carbon monoxide.

The results of the tests at 150aboutPresented in the table.

Thus, the data show that the proposed method of obtaining menominees catalyst for olefins purification process from carbon monoxide allows to obtain a catalyst with high capacity and reproducibility of properties with multiple cooking. Sorption properties of the catalysts prepared according to the invention are the same as for the known catalyst obtained by the application of a solution of magnesium bicarbonate. But the technology of preparation of the catalyst is much easier in comparison with the known method. Does not require bulky equipment for preparation of a solution of magnesium bicarbonate, excluded the stage of preparation of magnesium bicarbonate, activation of magnesium oxide is produced in the deposition reactor.

The METHOD of PREPARATION of the CATALYST FOR PURIFICATION of OLEI the sa copper compound of magnesium with a subsequent heat treatment, characterized in that a solution of ammonium carbonate complex of copper is introduced into the pre-activated by treatment with an aqueous solution of ammonia by heating magnesium oxide.

 

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