Scientific journal

European Journal of Natural History

ISSN 2073-4972

ИФ РИНЦ = 0,301

The butynediol-1,4 hydrogenation kinetic regulations study is very significant in the practical relations, as, especially, this reaction has already been laid in the basis of the butanediol-1,4 obtaining industrial process.

So, it should quite necessary to be developed and to be implemented the most efficient and the most stable catalysts for the organic synthesis in the production for the modern production development. The high - performance steady - state and the stationary catalysts development for the hydrogenation process at the modern requirements level in the industry is the most significant, while, at the same time, it is the complex technical challenge, the final solution of which is resulted in the butanediol-1,4 increase in its yield and, in general, its obtaining process efficiency. That is why, it should be necessary the highly - efficiently catalysts, due to the special requirements just to the obtained substances purity for this process carrying out [1-3]. In this connection, the butindiol hydrogenation process study on the modified nickel catalysts is the most actual and relevant [4-6].

So, the laboratory researches have been shown, that, developed by us, the SКN-39 alloyed catalyst is displayed the highest activity, its selectivity, and its stability, and the MNX and the NX industrial catalysts - the smallest ones at the butindiol-1,4 hydrogenation NХ [4]. At present, the SNK-39 from the alloyed catalyst has its industrial applications in a number of the hydrogenation processes, such as the oil aldehydes hydrogenation and the others. In this connection, the catalytic properties on the pilot installation have already been investigated by us, for the SKN-39 alloyed catalyst early introduction, which is also the highly - efficient catalyst in the butindiol-1,4 hydrogenation process. Thus, the MNX, NX, and SKN-39 catalysts enlarged and the integrated testing final results have already been given in the Tables 1-3.

Table 1. The MNX Various Catalysts Enlarged Tests Results, in the Butindiol-1,4 Hydrogenation Process. The Test Conditions: The Raw Materials Volume Flow Rate - 1 l./h., the Hydrogen Flow - 3 NM/h, pH - 7,0 - 9,...

　Table 2. The NX Industrial Catalyst Enlarged Tests Results in the Butindiol-1,4 Hydrogenation Process. The Test Conditions: The Raw Materials Volume Flow Rate - 1 l./h., the Hydrogen Flow - 3 NM/h

　Table 3. The SKN-39 Industrial Catalyst Enlarged Tests Results in the Butindiol - 1,4 Hydrogenation Process

Note: BAD - butanediol-1,4; BID - butynediol-1,4; BED - butenediol-1,4; ОМА - oxibutyl aldehyde.

So, it can be seen from the Tables 1-3 data, that the selectivity by the butanediol-1,4 at the butynediol-1,4 hydrogenation on the SKN-39 alloyed catalyst has been made up 86,9%, which is 18% higher, than at the MNX industrial catalyst. So, the selectivity by the butanediol is equal to 68,4%, under the similar conditions of the last catalyst work. For all this, the SKN-39 catalyst work duration has been made up 320 hours, while the MNX industrial catalyst operation time is much less, that is why, it has been made up only 200 hours. The butynediol-1,4 hydrogenation products chromatographic analysis has been shown, that the butanol yield, having had the production by - product, with the hydrogenation process duration increase, to the greatest extent, is being increased on the MNX (e.g. nickel/kaolin) and the HX (e.g. nickel/Cr₂O₃) catalysts. So, at the process duration, which is equal to 288 hours, the butanol yield on the NX catalyst has been made 16,2, and on the SKN-39 - 8,0%. At the same time, the butanol yield on the MNX catalyst is being increased up to 30,6% at the butynediol hydrogenation during 200 hours. So, the tests have been shown, that the butanol yield is being grown much slower, e.g. from 2,3 up to 8,0%, at the working with the SKN-39 alloyed catalyst. Having compared the SKN-39 alloyed catalyst data with the MNX industrial catalyst, it is clearly observed the first catalyst advantage. Their application in the production is quite able to be increased the process selectivity by the butanediol for 18-27%, and its stability in 1,5-2 times. So, the SKN-39 catalyst is possessed a higher hydrogenating capacity, than the MNX industrial one. The γ-hydroxybutyric aldehyde has been absent, and the butenediol - the intermediate product, and the butynediol - the raw materials have been, or have been absent, at butynediol-1,4 hydrogenation at the alloyed catalysts with the hydrogen low flow in the hydrogenation product. At the same time, in the hydrogenation product, having obtained after the butynediol-1,4 hydrogenation, the γ-hydroxybutyric aldehyde, the BED, and the BID have been present at the industrial catalyst.

Thus, the process performance is being increased in 1,5-2,0 times, the selectivity - for 15-30% at the butynediol hydrogenation at the SKN-39 catalyst, and the end product has a higher quality (e.g. the product purity is being increased by, at least, for 2-3%, in comparison with the MNX industrial catalyst).

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