SU698647A1 - Catalyst for hydrogenation of potassium maleite and dimethylcarbonal - Google Patents

Description

I

The invention relates to catalysts for the hydrogenation of potassium maleate and dimethyl ethyl carbinol.

Catalysts for the hydrogenation of unsaturated compounds are known on the basis of the metals of the periodic group of the yiil, including nickel-based l.

The closest technical solution of the invention is a nickel catalyst for the hydrogenation of unsaturated compounds, comprising an oxide compound of iron and alumina with the following content of components, wt.%:

Nickel.78-94

Alumina 2,3-7

Iron oxide 2.6-15 2.

The catalyst is prepared by leaching a nickel-iron-aluminum alloy.

The disadvantage of this catalyst is the relatively low catalytic activity in the hydrogenation of potassium maleate (8-28 ml of hydrogen / min nickel) and weak ferromagnetic catalyst, due to the low iron content.

Due to the low ferromagnetism, difficulties arise in the magnetic separation of the catalyst from the reaction mixture.

The purpose of the invention is to increase the activity of the catalyst and its ferromagnetic.

This is achieved by the fact that the catalyst contains nickel and iron hydroxide with the following content of components, wt.%:

Nickel5-10

Iron hydroxide 9O-95.

Distinctive features of the invention are the use and quality of the oxide compound of iron, iron hydroxide and the ratio of components.

The catalyst is prepared by reducing the nickel salts in an alkaline solution with ferrous iron salts from GO C to the boiling point solution.

Example 1. In 5OO ml a glass of Pyrex glass is added with 5 ml of an aqueous solution containing mg HI and 13OO mg REVOD. 7N.O. . ≪ r < 2 > r, chg gpor are brought to 50 ml with water and heated to 60 ° C. Then 50 ml of a saturated solution are poured in and the contents of the stack are heated to boiling. As a result of the reaction, a black flocculent precipitate appears. The catalyst is precipitated with an electromagnet and the solution above the precipitate is decanted. Washing is continued until the C6 ions are negatively reacted. Chemical analysis showed that the catalyst contained nickel and iron oxide in the following ratio, wt.%: Nickel 10 Iron hydroxide 90 Example 2. In 5OO ml of pyrex glass, add 5 ml of NiCC2 solution containing 500 mg of NI and 1800 mg. Most advanced operations Comparison of the composition of the catalyst on its activity in the hydrogenation of potassium mateate and dimethylethynylcarbinol in 0.1 n KOH at 40 ° C. examples 1. The catalyst according to the analysis contains 8% nickel and 92% iron hydroxide. Example 3. In a 500 ml glass of Pyrex, make 5 ml of an aqueous solution of NiCSg) containing 50 ml of Ki and 2600 mg. Further operations are similar to example 1, the catalyst according to the analysis contains 5% nickel and 95% ferric hydroxide. The washed catalysts prepared by the above methods are transferred into a catalytic duck, half an hour is saturated with hydrogen and potassium maleate (fAKK) and dimethylethylcarbinol (DMEK) are hydrogenated with 0.1 n KOH at 40 ° C. The results of the experiments on the hydrogenation on catalysts are given in the table.

obtained by the proposed method

Ni-lO-Fe (OH) -90

(OHI -92

at

(OH) -95

The catalysts obtained by the proposed method are almost 10 times more active than the known catalysts. The high ferromagnetic nature of the catalyst makes it easy to separate it from the products of hydrogenation of magnetic separation.

Claims (1)

Invention Formula Catalyst for the hydrogenation of potassium maleate and dimethylethynylcarbinol, including 295 170 25O 200 186 nickel and oxide compound of iron, characterized in that, in order to increase the activity and ferromagnetic catalyst, as an oxide 56986476 iron compounds it contains hydro-1. Sokolsky, D.V., et al. Catalysis of iron oxide with the following ratio of hydrogenation. Alma-Ata, Science, Research Institute of components, wt.%: 1975, s, 12. Nickel5-10 Iron hydroxide 90-95. Rayenina F.I. and others. DepositedThe sources of information, on the manuscript Me 7003-73, 1973, taken into account during the examination of the type.