Химическая технология/ кинетика и катализ

 

Catalitical hyryroving of aromatical carbo-hydrogen  to modified alloyed catalizator.

 

Shagrayeva B.B.   Omarbekova B.E.

 

International Kazakh-Turkish University named H.A.Yessevi,Shymkent,

Kazakhstan Republican.

 

            Nowadays obtaining organical industrial products founds in catalyzed hyryred furfurol .

         One of  the main direction in development of  chemical industry and obtains  main chemical products  is using of  local cheap, accessible vegetable and natural raw materials.

         One of the perspective direction is obtaining furfurol with acidic hydrolyzed wood, cotton pusk and another agricultural wastes. More needs to people’s farm observer in half-fulled (furfurol alcohol FC) and in au catalyzed  reconstruction (tetrahydrofurfurolled alcohol TGFC) according to their  application to get different kinds of resen, which connects materials in foundary production in another main branches of chemical industry.

         To the first view the process of catalytically reconstruction FF-FC→TGFC, is a simple process, however if we bake into consideration the formation of  product like methyfuran (sylvan), pentadid, amylalcohd, dimethylfuran etc, like resin half-finished products on high temperature.

         In virtue of literature survey, lighted modern condition problems, of hyryred furfurol in physical-chemical property, modified catalyzator could improve the skeleton catalyzator in basis of  Cu by selectical hyryred FF in FC, and to improve the quality of TGFC on bas of  Ni.

            Furfurol and tetrahydrofurfurolled alcohol (FC and TGFC) founds wide using in different branches of industry, that is why the continuation of a new  attempts, modified famous catalizators and the way of to get this alcohol by hyryred furfurol.

This view define the actual subjects to elaborate anew catalyzators to this  process, although there is no enterprises to get furfurol  alcohols in Kazakhstan.

             This work first used modified adds: ferrosilicomolibolen (FeSiMo), ferromolibolen (Fe Mo), ferrosilicocalsium (FeSiCa) which contains the main components Mo,Fe, Si,Ca.

             In this work with the help of the X-ray graphic analyses learned physical-chemical properties Cu-Al allays and catalyzators.

 

             The results of investigation shows in Table 1.                                                                             

SHihtovy composition of the alloy,

%

Property of phaseol alloys

Catalizators

 

Phase property

Parometr of lattice nm

Sizes of crystals nm

Specific surface,

 m2/g

Cu-Al

30-70

CuAl2, evthetic

(Al+CuAl2)

Cu, Cu2O, CuO γ-Аl2O3

0.361

9.3

17.1

Cu-Al-FSiCa

29-70-1.0

 

CuAl2, evthetic

(Al+CuAl2) FSiCa

Cu, Cu2O, CuO γ-Аl2O3, FX, Fe2O3, Fe3O4

0.361

7.2

44.5

Cu-Al-FMo

27-70-3.0

 

CuAl2,evthetic

(Al+CuAl2)FX

Cu, Cu2O, CuO γ-Al2O3, FX, Fe2O3, Fe3O4

0.361

9.5

22.7

Cu-Al-FSiMo

29-70-3.0

 

CuAl2,evthetic

(Al+CuAl2)FX

Cu, Cu2O, CuO γ-Al2O3, FX

0.361

8.0

36.5

        

From given materials in table-1 we could see that the adds FSiCa, FMo, FSiMo in Cu-70%  Al alloys formed X-ray graphic from  not dispered phase.  Also, all alloys contains intermetals-CuAl2 and evthetic (Cu+CuAl2). Catalyzators contains from skeleton copper, oxides: CuO, Cu2O, y-Al2O3, y-Fe2O3, Fe3O4. Adds of ferroalloys  not  influenced to the parameter of crystalic copper. The size of  modified ferro alloyed catalyzators is 6.5-10.5, the surface of catalyzators than skeleton Cu (70%Al) without adding is 17.5-45.0 m2/g. The more size surface have Cu(70%Al), then Cu-3% FSiMo and Cu-FMo catalyzators.

         By this way Ferro alloys which contains copper (70%Al) catalyzators represents the difficult system, contained skeleton copper, oxydes: CuO, Cu2O, y-Al2O3, y-Fe2O3, Fe3O4 free metal-chrome, etc., which prompted to make small the crystals skeleton copper , to form new center of activation (Cu, Fe), to increase the size of surface catalyzator.

 

Literature

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3. Shagrayeva B.B., Turtabayev C.K., Bitemiroba A.E., Koblanova O.N. -Восстановление фурфурола на сплавных катализаторах в жидкой фазе //Наука образование Южного Казакстана, Шымкент, 2001, №23, с. 25-29.

4. Turtabayev C.K., Kedelbayev B.Sh., Ashirov A.M., Shagrayeva B.B. -Исследование технологических свойств гидрирования фурфурола //Межд.науч.прак.конф. ”Ауэзовские чтения-3’’, Шымкент, 2001, с. 28-30.