SU1292823A1 - Catalyst for hydrating furfurol - Google Patents

Abstract

This invention relates to catalytic chemistry, in particular, skeletal catalysts (QD) for the hydrogenation of furfural, and can be used in a chemical industry. An increase in the CT activity is achieved by introducing an additional component at a certain ratio of substances. Composition of CT, wt.%: Copper 36.8-4.6.0, chromium 2, 10-2.23, iron 0.90-0.87, nickel 1.0-10.0, aluminum the rest. The tests show an increase in the productivity of CT from 22.9 to 37.5 g / g of CT-h, which indicates a better activity of CT. 1 tab. o (o

Description

one

This invention relates to skeletal catalysts for the hydrogenation of furfrole and can be used in the chemical industry.

The aim of the invention is to increase the catalyst activity by introducing an additional component and a certain ratio of catalyst components.

Example 1. For the preparation of the initial alloy, nondeficient ferrochrome (PC) is used, containing, in wt.%: Chromium 69.1; iron 29.04; impurities (silicon, carbon, phosphorus, sulfur) 0.96. During smelting, impurities are volatilized, as confirmed by X-ray spectral analysis. With this in mind, the initial alloys of gt are as follows.

To prepare 100 g of an alloy containing wt .-%: Cu 41.90; A1 50 PF 3.10; Ni 5.0, in a quartz crucible load 52 g of aluminum in the form of a piece; Cove 3-5 mm in size and heated in

high-frequency melting furnace up to 900-1000 ° С. Next, 41.9 g of copper, 3.1 g of PC and 5.0 g of Ni are introduced into the molten aluminum. As a result of the exothermic reaction, the melt temperature rises to 1700-1800 ° C. At this temperature, the melt is held for 5 minutes, after which the furnace is turned off and cast into graphite molds. The alloys are cooled in air, crushed, and leached with a 20% sodium hydroxide solution in a boiling water bath for 1 hour. Then, the catalyst is thoroughly washed with water from alkali to neutrality over flandalein. A catalyst prepared in this manner is used to hydrogenate furfural.

Similarly, samples of alloys of different composition are prepared.

Cu-Al-Fe-Cr-Ni 46-50-0.9-2.1-1.0

43.9-50-0, 95-2.15-3.0

I

I The table shows the composition of the original alloys.

Experiments to study the activity of catalysts are carried out in an autoclave with intensive displacement under hydrogen pressure. 200 cm of 10% aqueous is used for hydrogenation.

solution of freshly distilled furfural. The catalyst wedge is 2.5% by weight of the starting furfural. Temperature experience 60-120 ° C, hydrogen pressure of 6 MPa.

Hydrogenation products are analyzed on a Chrom-4 chromatograph using gas-liquid chromatography. The catalyst activity is determined by the rate of hydrogenation (W), expressed in g of furfurous alcohol (PS) per 1 g of catalyst per 1 h (W, g / g-h).

The results of the hydrogenation of furfural on copper-alumina (ominigellose oxidation catalysts are presented in the table. From these tables it follows that the hydrogenation of furfural on the studied catalysts is carried out selectively to furfuryl alcohol

From the data table shows that the activity of the catalyst according to the invention is higher than the known catalyst.

Claims (1)

Invention Formula The catalyst for hydrogenation of furfural based on leached copper and chromium iron-aluminum alloy, characterized in that, in order to increase the activity of the catalyst, the starting alloy additionally contains nickel in the following ratio of components, wt.%: Copper 36.8-46.0 Chromium 2,10-2,23 Iron0.90-0.97 Nickel1.0-10.0 Al Omini14 Else 59,075,030,6 76,592,037,5 92,098,540,2 56,072,029, 4 Table continuation