SU255203A1 - METHOD FOR PREPARING THE CATALYST FOR OBTAINING XYLIDINE - Google Patents
METHOD FOR PREPARING THE CATALYST FOR OBTAINING XYLIDINEInfo
- Publication number
- SU255203A1 SU255203A1 SU464521A SU464521A SU255203A1 SU 255203 A1 SU255203 A1 SU 255203A1 SU 464521 A SU464521 A SU 464521A SU 464521 A SU464521 A SU 464521A SU 255203 A1 SU255203 A1 SU 255203A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- catalyst
- xylidine
- preparing
- obtaining
- solution
- Prior art date
Links
- 239000003054 catalyst Substances 0.000 title description 15
- PNEYBMLMFCGWSK-UHFFFAOYSA-N AI2O3 Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 4
- 238000005755 formation reaction Methods 0.000 description 4
- FVHAWXWFPBPFOS-UHFFFAOYSA-N 1,2-dimethyl-3-nitrobenzene Chemical group CC1=CC=CC([N+]([O-])=O)=C1C FVHAWXWFPBPFOS-UHFFFAOYSA-N 0.000 description 3
- 239000010949 copper Substances 0.000 description 3
- 150000004992 toluidines Chemical class 0.000 description 3
- UXJVWJGDHIZPLD-UHFFFAOYSA-O Ammonium vanadate Chemical compound [NH4+].O=[V-](=O)=O UXJVWJGDHIZPLD-UHFFFAOYSA-O 0.000 description 2
- KBJMLQFLOWQJNF-UHFFFAOYSA-N Nickel(II) nitrate Chemical compound [Ni+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O KBJMLQFLOWQJNF-UHFFFAOYSA-N 0.000 description 2
- 239000006227 byproduct Substances 0.000 description 2
- 238000003776 cleavage reaction Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 125000003277 amino group Chemical group 0.000 description 1
- QGZKDVFQNNGYKY-UHFFFAOYSA-N ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 150000001879 copper Chemical class 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005470 impregnation Methods 0.000 description 1
- CTQNGGLPUBDAKN-UHFFFAOYSA-N o-xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000008096 xylene Substances 0.000 description 1
Description
По авт. св. № 14876 известен способ приготовлени катализатора дл получени ксилидина воссталовлением нитроксилола путем пропитки сформованного носител , «апример окиси алюмини , раствором ванадата аммони и затем - раствором азотнокислого никел с последующим орокаливанием катализатора при теМПературе 400 - 500°С.By bus. St. No. 14876 is a known method of preparing a catalyst for producing xylidine by reducing nitroxyne by impregnating a molded carrier, for example, alumina, with ammonium vanadate solution and then with a solution of nickel nitrate, followed by orodling the catalyst at 400-500 ° C.
Катализатор, приготовленный этим способом , способствует глубокому восстановлению- отщеплению аминогруппы с образованием аммиака, ксилола и отщеплению радикала СНз с образованием толуидинов, «/о:The catalyst prepared in this way contributes to a deep recovery - cleavage of the amino group with the formation of ammonia, xylene and cleavage of the CH3 radical with the formation of toluidines, "/ o:
при 300°С при 400°С Аммиак623at 300 ° C at 400 ° C Ammonia623
Ксилол3,69,5Xylene3,69,5
Толуидины3,65,7.Toluidine 3.65.7.
В процессе восстановлени нитроксилола при 250 - 300°С с применением катализатора, полученного известным способом, образуютс побочные продукты, которые уменьшают выход ксилидина.In the process of reducing nitroxylene at 250-300 ° C using a catalyst prepared in a known manner, by-products are formed which decrease the yield of xylidine.
Дл повыщени выхода ксилидина предлагаетс к катализатору добавл ть медь в количестве 3% от веса окиси алюмини .To increase the yield of xylidine, it is proposed to add copper to the catalyst in an amount of 3% by weight of alumina.
Дл получени катализатора восстанавливают нитроксилол пропиткой сформованного носител , например окиси алюмини , раствором ванадата аммони и затем раствором азотнокислого никел и раствором соли меди (из расчета 3;э/о Си от веса AlgOs). Затем катализатор прокаливают при температуре 400- 500°С.In order to obtain a catalyst, nitroxylene is reduced by impregnation of a molded support, for example alumina, with ammonium vanadate solution and then with a solution of nickel nitrate and a solution of copper salt (at the rate of 3; e / o Cu by weight of AlgOs). Then the catalyst is calcined at a temperature of 400-500 ° C.
Предлагаемый способ приготовлени катализатора позвол ет проводить количественное восстановление нитроксилола до ксилидина при температуре 250 - 300°С; сократить образование побочных продуктов в 3 - 6 раз; устранить отщепление радикала СНз и, следовательно , исключить образование толуидинов; увеличить выход ксилидина до 94о/о уже в первые часы работы катализатора; получить высокоактивный катализатор.The proposed method for the preparation of the catalyst allows the quantitative reduction of nitroxyne to xylidine at a temperature of 250-300 ° C; reduce the formation of by-products by 3-6 times; eliminate the splitting off of the CH3 radical and, therefore, eliminate the formation of toluidines; to increase the yield of xylidine to 94o / o already in the first hours of the catalyst; get a highly active catalyst.
Такой катализатор работает в процессе восстановлени нитроксилола до ксилидина более 1000 час, не снижа своей активности. Длительность периодов контактировани Such a catalyst works in the process of reducing nitroxylene to xylidine for more than 1000 hours, without reducing its activity. Duration of contact periods
200 - 220 час вместо 90 - 110 час с известным катализатором.200 - 220 hours instead of 90 - 110 hours with a known catalyst.
Предмет изобретени Subject invention
Способ приготовлени катализатора дл получени ксилидина восстановлением нитроксилола по авт. св. № 14876, отличающийс тем, что, с целью повышени выхода ксилидина , к катализатору добавл ют медь в количестве Зй/д от веса окиси алюмини .The method of preparation of the catalyst for the preparation of xylidine by reduction of nitroxyne according to the author. St. No. 14876, characterized in that, in order to increase the yield of xylidine, copper in the amount of Kg / d by weight of alumina is added to the catalyst.
Publications (1)
| Publication Number | Publication Date |
|---|---|
| SU255203A1 true SU255203A1 (en) |
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