SU1033431A1 - Method for producing carbon oxide - Google Patents

Abstract

1. A method of producing carbon monoxide by decomposing formic acid at an elevated temperature in the presence of a phosphate-containing catalyst, characterized in that, in order to increase the degree of conversion of formic acid and the selectivity of the process, 5-49.3 Calcium oxide 42.5-47.5 P phosphorus thioxide 0.05-1.0 Chlorine. Water or calcium boron phosphate catalyst composition, wt% 48.96-52.23 Calcium oxide 42.8-45.03 Phosphorus pentoxide 0.10-0.90 chlorine. } 0.005-0.15 Boron oxide The rest is water 2. The method according to claim 1 is about tons of l to h agus and with the fact that the process is carried out at 200-500s and the feed rate of formic acid is 3.7-7.5 g per 1 g W catalyst per hour.

Description

00

with

four

WITH

The invention relates to the production of carbon monoxide and can be used in industrial dispersion, in particular for the oxo-synthea process and other carbon monoxide-based syntheses.

A known method for producing carbon monoxide by decomposing formic acid on alumina at 200300 ° C. In this case, the conversion of formic acid is 99.6-100%, the yield of carbon monoxide is 98.8-99.7 Ij.

The disadvantage of this method is low activity of alumina oxide, so the ratio of formic acid supplied to a unit weight of the catalyst is 0.07-0.1 g / gH.

The closest to the proposed, technical essence and the achieved result is a method of producing carbon monoxide by decomposition of formic acid on boron phosphate (BP04J at 100-ZO. T2j.

The disadvantage of this method is sintering of the catalyst, as a result of which the conversion is reduced from 93% to 70-50% after 100–200 h of operation.

The purpose of the invention is to increase the degree of conversion of formic acid and the selectivity of the process.

The goal is achieved according to the method of producing carbon monoxide, which includes decomposition of formic acid at elevated temperature in the presence of a calcium phosphate catalyst of composition, wt.% 8 CaO 44.5-49.3; g 47.5; C6 0.05-1%; water - the rest, or calcium boron phosphate catalyst composition, wt.%: GaO 48,96-52,23; 42.8-45.03; ce 0.10-0.90; BjiOT, 0.005-0.15; water - the rest.

The process of decomposition of formic acid is expediently carried out at 200-500 0 and the feed rate of an acid of another 3.7-7.5 g per. 1 g of catalyst per hour. These parameters ensure the optimal course of the process, the highest conversion of formic acid and the yield of carbon monoxide.

Example 1 {prototype). 100 ml of phosphate are loaded into a flow-type reactor with electrical heating.

boron (BRO4). Thermal treatment of the catalyst is carried out at 800 ° C for 20 hours. Then 200 ml / h of formic acid (or 3.7 g / g of catalyst, are continuously supplied with

hour). Obtain 110 l / h of gas of the following composition, vol.%: CO 95.5; COj 2.0; Nd 2.5. Conversion 93%, selectivity 95.5%. However, after 100 hours the conversion drops sharply and then completely

0 The decomposition of formic acid is stopped. The spin-off catalyst has a sintered appearance.

 Example 2. A 100 ml of catalyst of the following composition, wt.%, CaO 44.5; 47.5; every 0.05; water - the rest. When continuously fed 200 ml / h of formic acid (or 3.7 g / g of catalyst per hour). Get 118.5 l / h of gas of the following composition,%: CO-99/6; CO2 2.0; On. 0.2. Conversion 99, 7%, selectivity 99.6% for 600 hours without change. Example Z. In a flow-type reactor with electrical heating, Z. loading, 100 ml of a catalyst of the following composition, wt.%: CaO 48.96; 45.03; ce 0.10; VdRz 0.15; water - the rest. When continuously feeding 300 ml / h of formic acid (or 5.6 g / g of catalysts per hour). Get 177.7 l / h of gas of the following composition, vol.%: CO 96, Jj CC 1.9; ,9. Conversion 99.7%, selectivity 96.2% for 800 hours without change.

Etc. Imer 4. Into a flow reactor with a catalyst of the following composition,%: CaO 49.3; 42.5; All water is the rest, at 500 ° С 400 ml of formic acid (or 7.5 g / g of catalyst per hour) is continuously fed. Get 236.4 l / h gaea of the following composition, vol.%: SC 96.5; SOC 2.0; H ,, 5. Conversion 99.5%;; selectivity of 96.50% for 1000 unchanged.

The use of calcium-based catalysts containing phosphorus or phosphorus and boron to produce carbon monoxide makes it possible to increase the yield of carbon monoxide. Over 1000 hours, the conversion is 99% with a selectivity of 96-99%.

Claims (2)

1, METHOD FOR PRODUCING CARBON OXIDE by decomposition of formic acid at elevated temperature in the presence of a phosphate-containing catalyst, characterized in that, in order to increase the degree of conversion of formic acid and the selectivity of the process, a calcium phosphate catalyst of the composition is used in the decomposition of formic acid, May.%: Calcium Oxide 44.5-49.3 Phosphorus Pentoxide 42.5-47.5 Chlorine 0.05-1.0 Water Else or calcium borophosphate catalyst composition, wt.% 5 Oxide calcium 48.96-52.23 Phosphorus pentoxide 42.8-45.03 Chlorine 0.10-0.90 Oxide bora .Ts 0.005-0.15 Water Rest 2. The method according to π. 1, l and m of h and w · d and I th with the fact that the process is conducted at 200-500 C and ^a feed rate of mu- 'ravinoy acid 3,7-7,5 g per 1 g of catalyst per hour. >