SU1748854A1 - Method of producing catalyst for metathesis of olefins - Google Patents

Abstract

The invention relates to catalytic chemistry, in particular the preparation of a catalyst for the metathesis of olefins, which can be used in petrochemistry. The goal is to increase the activity of the catalyst. For this, the alumina is impregnated with an aqueous solution of bis- {aqua (/ L2-oxo) oxoaloxodibdenum (5+) dihydrazinate (5+) followed by treatment with ammonia, drying, and then treatment with ethanol - ethanol, n-propanol or isopropanol or their mixture, and drying. In this case, the activity of the catalyst in the reaction of metatheic propylene is higher by 9-10 times, hexene-1 is more than 2 times 1 tab.

Description

The invention relates to the production of catalysts for hydrocarbon conversion reactions, in particular for the preparation of olefin metathesis catalysts.

The aim of the invention is to obtain a catalyst with increased activity due to the additional treatment of the catalyst mass with an alcohol selected from a certain group, or their mixture, and subsequent drying.

Example 1. 20 g (DD-surface 200 cm2 / g) are impregnated with 30 ml of an aqueous solution containing 3.3 g of bis-aqua (/ y-oxo) oxo oxalo- molybde-de (V) dihydrazinate for 5 hours by heating in a water bath to 80 ° C, hereinafter referred to as molybdenum oxalate (V). Then the catalyst is washed with water, treated with 30 ml of a three percent ammonia solution for 5 hours at room temperature, then washed with water until neutral with ammonia, dried under an IR lamp at 100 ° C. The resulting catalyst contains (A1-0) 2

Mo202 (OH) 4 (H20) 2 - 9.6 May%, the rest.

Example 2 20 g (sp. Surface 200 cm 2 / g) are impregnated with 30 ml of an aqueous solution containing 3.3 g of molybdenum oxalate (V) for 5 hours while heating in a water bath to 80 ° C. Then the catalyst is washed with water and worked up. 30 ml of a 3% ammonia solution for 5 hours at room temperature, then washed with water until neutral with ammonia, dried under an IR lamp at 100 ° C. The catalyst obtained is impregnated with moisture for 1 hour with ethyl alcohol, then dried under an IR lamp at 100 ° C

The test conditions and activity values are listed in the table.

Example 3 The catalyst was prepared in a manner similar to Example 2, only the catalyst obtained after treatment with ammonia and dried at 100 ° C was impregnated with moisture capacity with isopropyl alcohol for 1 h, then dried under an IR lamp at 100 ° C.

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Example 4. The catalyst was prepared as in example 2, only obtained after treatment with ammonia and the dried catalyst is soaked in moisture capacity with n-propyl alcohol for 1 h, then dried under an IR lamp at 100 ° C.

Example 5. The catalyst was prepared as in example 2, only obtained after treatment with ammonia and the dried catalyst is impregnated by capacity with a mixture containing 50% vol. Ethyl alcohol and 50% vol. isopropyl alcohol for 1 h, then dried under infrared at 100 ° C.

Comparison of the data in the table shows that the catalysts obtained in accordance with the proposed method are 9-10 times more active than the catalyst of the prototype in the reaction of propylene metathesis

and more than 2 times in the reaction of gvksen-1 metathesis.

A considerable advantage of the method is the availability of used for processing

Claims (1)

alcohols and ease of working with them. Claims A method for preparing a catalyst for metathesis of olefins by impregnating alumina with an aqueous solution of bis aqua (de-oxo) oxo oxalato-molybdenum (V) dihydrazinate followed by treatment with ammonia and drying the catalyst mass, characterized in that, to obtain a catalyst with enhanced activity, The catalyst mass is further treated with an alcohol selected from the group consisting of ethyl, n-propyl, isopropyl, or their mixture, followed by drying.  Reaction CONDITIONS: static circulating setting, temperature 100 ° C, propylene pressure 120 fw.pT.CT., catalyst weight 0.05-0.1 g Reaction conditions: static liquid-phase installation, temperature 50 ° C, catalyst weight 0.05-0.1 g