SU1351647A1 - Catalyst for hydrating furfural - Google Patents

Abstract

The invention relates to catalytic chemistry, in particular to catalysts (QD) for the selective hydrogenation of furfural to furfuryl alcohol. The increased CT activity is achieved by adding an additional ingredient to it. CT in its composition contains the following components, wt%: copper 41.92-43.96; chromium 1.5378-1.5569; iron 1,6322-2,8781 ;. silicon 2.4820-2.4902; titanium .0.3880-1.1584; aluminum - the rest. Tests show that the rate of hydrogenation of furfural in the presence of CT is 40.0 g of furfuryl alcohol with 1 g of CT in 1 h versus 34.3 g in the known case. 1 tab. i ate 1

Description

 113

This invention relates to catalysts for the selective hydrogenation of furanol to furfuryl alcohol.

The aim of the invention is to increase the activity of the catalyst by adding an additional ingredient thereto.

Example. To obtain 100 g of an alloy for a catalyst of composition 2 (see table), 52 g of aluminum in the form of 3–5 mm pieces and heating is charged into a quartz crucible from a high-frequency melting furnace to 900–. 37.84 g of copper, 5.16 g of ferrosilicochrome and 7.0 g of ferrotitanium containing iron, 61.05 wt.%, Titanium, 38.7 wt.% And 0.25 wt.% Impurities are introduced into the molten aluminum. in the form of silicon, phosphorus and sulfur. As a result of the exothermic reaction, the melt temperature is heated to 1700-1800 ° C, the melt is kept for 5 minutes, the furnace is turned off, the melt is poured into graphite molds.

The alloy is cooled in air, crushed in a metal mortar, choose a fraction of 0.25 mm.

The catalyst is prepared by leaching it with a 20% sodium hydroxide solution. From the calculation: for 1 g of the alloy 60 m solution. Leaching is carried out for 1 h in a boiling water bath.

The catalyst is washed with distilled water until neutral with phenolphthalein.

Electron microscopic analysis shows that the average size of a part of the leached catalyst is 0.38 - 0.44 µm, while their size of the leached known catalyst based on non-promoted skeletal copper is 0.18 µm.

X-ray microanalysis showed that the alloys consist of eutectics (Al + CuAl) and the intermetallic compound CuAl, which contain dissolved additives of Cr, Fe, Si, Ti. In addition, small inclusions (50–10 µm) with higher alloying metal-2 contents were found in the alloy.

fishing It is shown that these inclusions are not completely destroyed by the alkali solution and enter the leachate products, thus forming qualitatively new active substances.

centers on the surface of catalysts. The presence of alloying metals in catalysts was also confirmed by chemical analysis.

The study of the activity of the obtained catalyst in the reaction of hydrogenation of furfural to furfuryl alcohol is carried out in an autoclave with vigorous stirring under a hydrogen pressure of 6 MPa and a temperature of 90 C. They take

0.5 g of catalyst and 200 cm of YuH-aqueous solution of freshly distilled furfural. Experience lead 60 min.

Products are analyzed by chromatography.

The catalyst activity is estimated by the rate of hydrogenation (expressed in g of furfuryl alcohol) per g of catalyst per 1 hour. The speed is calculated from the total yield of the product in 60 minutes, including the output at zero time (time to reach the working temperature).

The remaining catalyst compositions are prepared analogously to the example by changing the ratio of the starting components. The initial composition of the catalyst and the results of the hydrogenations of furfural on it are given in the table.

Formula of invention.

Catalyst for hydrogenation of furies of furol based on leached copper-chromium-iron-aluminum alloy, characterized in that, in order to revive the activity of the catalyst, the starting alloy additionally contains tntan at the following content of components, May. %: Copper 41.92-43.96 Chromium 1.5378-1 5569 Iron 1.6322-2.8781 Silicon 2.4820-2.4902 Titanium 0.3880-1.1548 Aluminum Remaining

N

CM

vO

):

f.

CM

Claims (1)

Claim. A catalyst for hydrogenation of furfural based on leached copper-chromium-iron-silicon-aluminum alloy, characterized in that, in order to increase the activity of the catalyst, the initial alloy additionally contains titanium at the following component content, May. %: Copper 41.92-43.96 Chromium 1, 5378-1.5569 Iron 1.6322-2.8781 Silicon 2.4820-2.4902 Titanium 0.3880-1.1548 Aluminum Rest 3 1351647 Joint venture With eh about with • joint venture <04 • h well 04 l 04 Joint venture - “ 04 about with <r with cp cm Joint venture <· Joint venture Joint venture 1 eleven 1 40 i * “ about l about *1 about ABOUT g " about l ABOUT ABOUT) 1 o 1 G * Joint venture 00 ‘ W <r at f 40 100 Gh gh 04 04 04 00 16 ^ 1 eleven 1-1 g 1 1 o <r about about ABOUT <R f 1 about 1 1 liter 1 1 m e. 04 l l *> 1 1 n 1 about 1 40 Joint venture 40-. 00 00 mp SM | 1 a 1 1 40 40 mn Gh 00 00 Γχ 1 1 s 1 1 I 1 η | 1 1 1 o "1 1 1 1 SI 1 1 1 o 21 1 o about cp about about ABOUT ! 1 U. I 1 ' 0h l 01 l * 1 1 o ^l 1 about 1 KO cm oo 40 40 cp About 1 1 η Joint venture! CM 1 <g Joint venture MP 40 40 mp 1 I about <υι 1 1 1 E £ at 1 1 | 5 $ i 1 1 1 a 1 1 1 1 £ » t 1 UH Joint venture about 04 about xt W 1 14+ 1 1 *· 04 *4 * *1 * I 1 a 1 about 1 o g — 1 gh oo 00 <r SP 1 1 >> 1 - < I cp cp cm Joint venture sf SP 1 14+ 1 I 1 1 1 1 - + 1 i 1 1 1 1 o 1 ! W about about about about about ABOUT ! 1m 1 I ^l l 0h 01 L 0h * 1 ! /I 1 1 <t cm g * "- · 04 SP 1 ΙΜ 1 1 1 1 1 about 1 - 1 mid - 1 f 1 I 1 1 1 1 1 1 1 1 1 1 s 2 1 1 1 1 1 o about about ' about about about 1 1 1 1 1 1 I § Ή 04 • 0h 0h 04 * h 1 1 1 in ΐ 1 o about about about about about O- 1 1· 1 <i I w mn ΜΊ un mn. mp 1 I < Gh ABOUT· with I ! 04 "M cm 00 <r 4— < "in 1 About Uh 00 un Γχ 1 04 40 Gh Joint venture ♦ GC. S ! * 0h "H l 04 0h n 1 -. CM cp about - about 1 fr «1 • 1 ί ’§ 1 I 1 <f 04; about mid ΪΜ 1 1 mid 1 and 1 I 1 - about mid about 40 CM I rt 1 12 1 midrange <r 40 00 04 00 40 1 2 1 1 <and 1 MP un MP * cf <r <I 1 a I * • h 04 04 r> 04 * 1 * 1 1 midrange mid mid mid mid cm Mid 1 1 f CD 1 S 1 about joint venture 1 04 1 40 00 CM about CM CM co About w - 1 CM ί 1 TO 1 <and 1 CM 04 ** co Γχ W mr 1 t ¢ 8 1 h 1 CO co 40 co CM about 1 1 6 " 1 <and 1 04 04 04 ' 04 04 04 "H ! ^I 1 C0 1 % 1 <r un Gh CM CM ί a 1 I X 1 I 1 1 f 1 AND 1 1 1 f ¢ 0 1 1 Joint venture <r 40 00 04 co b Gh 1 a 1 b 1 1 CM 4 © Gh 40 Gh S Midrange ! " 1 and 1 2 1 40 Γχ 00 co UO <1 ¢ - CM 1 1 about 1 ABOUT 1 Mh W W in in un about MP 1 <and 1 ω 1 a 1 04 04 04 04 04 •4 R * 1 d 1 1 X 1 ABOUT • m 1 ί)! f 1 1 a 1 L 1 1 1 TO {§ 1 1 f 00 about 40 CM <r about 1 n 1 1 L 1 co oo 00 04 04 04 AND about 1 i 1 1 Ef I 04 04. •4 04 04 04 04 1 i 1 1 F 1 04 Γχ co V <m CM ¹ B I 1 1 S 1 1 m co co <r <r 1 <in ί a i t ί υ 1 1 I f t ! * ! t X X 1 1 & I 1 CM co <r UO 4 © Γχ 1