SU597744A2 - Electrode with active layer - Google Patents

Description

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The elimination refers to the design of electrodes used in the processes of producing organic compounds, and is an improvement of the known electrode described in auth.-No. 247250 1.

In the main invention of auth. St. No. 247250 describes an electrode with an active layer used in processes for producing organic compounds, in particular, by reducing organic substances. The electrode has an active layer of a catalytic ferromagnetic powder and is supplied with a magnetic field source that serves to hold the active layer on the electrode surface.

The known electrode is ineffective in the processes: recovery of hardly soluble organic substances.

This is due to the fact that the process of recovering sparingly soluble substances proceeds at low speeds due to insufficient contact of organic matter with the active layer — the catalyst. Usually these difficulties are overcome by the use of organic matter or by intensive mixing of the electrolyte.

Since the introduction of organic solvent reduces the emissivity of the system, it tends to achieve an intensification of the process due to intensive mixing. However, intensive mixing with the use of a known electrode does not give the expected effect, it only greatly increases the speed of the recovery process, since the active layer is detached from the electrode and leaves the reaction zone.

The aim of the invention is to create an electrode structure that would allow for significantly more intensive drying of the process of recovering hardly soluble organic substances.

This goal is achieved by the fact that radially emitting dielectric strips, connected by an annular bridge, are located on the electrode surface.

FIG. 1 shows the proposed electrode; in fig. 2 shows a cell

for the restoration of organic matter, equipped with the proposed electrode.

The electrode is a smooth metal disk 1. On the surface of the disk 1 there is an active layer 2 of a catalytic ferromagnetic powder. On the same surface of the disk 1 there are radially dispensing strips 3 connected by an annular bridge 4, Planks 3 and a circular bridge 4 are made of a dielectric.

The electrochemical cell for the reduction of organic compounds (Fig. 2) consists of two communicating vessels 5 and 6, filled with electrolyte, between which is located an aaaaaa U. In vessel 5 there is an anode 8, and in vessel 6 a cathode 9. Cathode 9 is the proposed electrode.

Under the metal disk 1 magnet 1O is placed. The stirrer 11 serves to intensively mix the electrolyte,

In the electrochemical cell shown in FIG. 2, electrocatalytic reduction of various organic compounds is carried out. Skeletal nickel is used as the active layer. The latter is prepared by leaching in a boiling water Md-g-AE alloy bath (50%) for 2 hours, followed by washing the catalyst with distilled water.

In one case, the restoration is carried out without mixing the electrolyte, in the other case with mixing the electrolyte at a known electrode, in the third case with mixing the electrolyte and absorbing the proposed electrode.

The results of scavenging are shown in FIG. 3, 4, 5 in the form of graphs. Along the axis of the abscissa, the number of hull catches is postponed, and along the axis of the coordinates - the speed of recovery is 111i.

Curve 1 corresponds to the process without mixing the electrolyte.

Curve 2 - carrying out the process with the mixing of the electrolyte and using a known electrode.

Curve the 3rd by mixing the electrolyte and using the proposed electrode.

FIG. 3 - data on the electroreduction of mesityl oxide are presented; in fig. 4 - data on the electroreduction of methyl propyl ketone; in fig. 5 - data on the electroreduction of pseudo-ionone (6, 10, 1O-trimethyl decene-3, 5, 9-OH2).

As can be seen from the above data, speed. The recovery rate when using a geptagand electrode is 1.2-1.4 times higher than that using a known electrode.

At the same time, the amount of catalyst that is necessary to achieve the maximum reduction rate with electrolyte mixing with the use of the proposed electrode is 8-1 O times less than when using the known electrode,

invention formula

Electrode with an active layer according to the author's certificate No. 24725О, characterized in that, in order to intensify the recovery process of sparingly soluble organic substances, radially divergent strips, connected by an annular bridge, are located on the electrode surface.

Sources of information taken into account 1FN examination:

1. USSR author's certificate: No 247250, cl. From 25 VTs / On, dated January 8, 1996.

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