Öz
Polietilen tereftalat (PET)’a alternatif ve özellikleri PET’den daha iyi olan polietilen naftalat (PEN)’in üretiminde 2,6-Dimetil naftalin (2,6-DMN) önemli bir birleşiktir. 2,6-DMN, PEN’in monomerlerinden birisi olan 2,6-naftalindikarboksilik asitin ( 2,6-NDCA) sentezinde ana girdi maddesidir (Zhang 2010). 2,6-DMN üretimi bir çok araştırmacı tarafından çalışılmıştır (Lin 2006). 2,6-DMN üretiminde en önemli sorun, yüksek seçimlilikte ve yüksek dönüşümde ürün veren katalizör geliştirilmesidir. Bu çalışmada, Y zeolit katalizörü üzerinde 2-metil naftalinin (2-MN) disproporsiyonu ile dimetil naftalinlerin üretimi araştırılmıştır. Deneylerde besleme olarak molar bileşimi 1:1 olan 2-MN:Benzen karışımı kullanılmıştır. Reaktöre 2cm3 katalizör yerleştirilmiş ve bu katalizör azot ortamında aktivasyon ve test işlemine tabi tutulmuştur. Elde edilen gaz ürünler, soğuk etilen glikol sirküle edilen bir yoğuşturucu ile yoğunlaştırılmıştır. Yoğuşturucuda toplanan sıvı ürünler 60 metre uzunluğa sahip kapiler kolonlu GC-MS ile analiz edilmiştir.
Anahtar Kelimeler
: Polietilen naftalat (PEN); 2 6-Dimetil naftalin (2 6-DMN); Y Zeolit; Disproporsiyon
Kaynakça
- Li, C., Li, L., Wu, W., Wang, D., Toktarev, A. V., Kikhtyanin, O. V. and Echevskii, G. V. (2011). Highly Selective Synthesis of 2,6-Dimethylnaphtalane Over Alkaline Treated ZSM-12 Zeolite, Procedia Engineering, 18, 200-205.
- Lin, L., Fang, Y. and Hu, H. (2006). Selective Synthesis of 2,6-Dimethylnaphthalene by Methylation of 2-Methylnaphthalene with Methanol on Zr/(Al)ZSM-5, Catalysis Communications, 7, 255-259.
- Lucas, N., Bordoloi, A., Amrute, A.P., Kasinathan, P., Vinu, A., Bohringer, W., Fletcher, J.C.Q. and Halligudi, S.B. (2009). A Comparative Study on Liquid Phase Alkylation of 2-Methylnaphthalene with Long Chain Olefins using Different Solid Acid Catalysts, Applied Catalysis A: General, 352, 74-80.
- Matsuda T., K. Yogo, T. Nagaura, Kikuchi E. (1990). Disproportionation of Methylnaphthalenes Over Zeolite Cataysts, Sekiyu Gakkaishi, 33, 214-220.
- Millini, R., Frigerio, F., Bellussi, G., Pazzuconi, G., Perego, C., Pollesel, P. and Romano, U. (2003). A Priori Selection of Shape-Selective Zeolite Catalysts for the Synthesis of 2,6-Dimethylnaphtalane, Journal of Catalysis, 217, 298-309.
- Park, J. N., Wang, J., Hong, S. I. and Lee, C.M. (2005). Effect of Dealumination of Zeolite Catalysts on Methylation of 2-Methylnaphthalene in a High-pressure Fixed-bed Flow Reactor, Applied Catalysis A: General, 292, 68-75.
- Pu, S. B. and Inui, T. (1996). Synthesis of 2,6-Methylnaphthalene by Methylation of Methylnaphthalene on Medium and Large-pore Zeolite Catalysts, Applied Catalysis A: General, 146, 305-316.
- Robert B. and Wincenty S. (2003). Disproportionation of Isopropylnaphtalene on Zeolite Catalysts, J. of Catalysis, 220, 13-22.
- Shuo C. and George M. (2004). Study of Coke and Coke Precursors During Catalytic Cracking of n- hexane and 1-hexene Over Ultrastable Y zeolite, Catalysis Letters, 96.
- Tsutsui, T, Ljichi, K., Inomata, T., Setiadi, Kojima, T. and Sato, K. (2004). Enhancement of Conversion and Selectivity by Temperature-swing Unsteady-state Reaction Method in Shape-selective Methylation of Methylnaphthalene with ZSM-5, 59, 3993-3999.
- Zhang, C., Guo, X., Song, C., Zhao, S. and Wang, X. (2010). Effects of Steam and TEOS Modification on HZSM-5 Zeolite for 2,6-Dimethylnaphthalene Synthesis by Methylation of 2- Methylnaphthalene with Methanol, Catalysis Today, 149, 196-201.
- Zhang Y., Junpeng F., Zhanjun L. and Xuekuan L. (2014). Improved Stability and Shape Selectivity of 2,6-Dimethylnaphthalene by Methylation of with Methanol on Modified Zeolites, Modern Research in Catalysis, 3, 19-25.
- Zhao, Z., Wang, W., Qiao, W., Wang, G., Li, Z. and Cheng, l. (2006). HY Zeolite Catalyst for Alkylation of α-Methylnaphthalene with Long-chain Alkenes, Microporous and Mesoporous Materials, 93, 164-170.
Öz
2,6-dimethyl naphthalene (2,6-DMN) is an important compound for polyethylene naphthalate (PEN) production which is an alternative for polyethylene teraphtalate (PET) and has better qualities than PET. 2,6-DMN is a precursor for 2,6-naphthalenedicarboxylic acid (2,6-NDCA) synthesis which is one of the monomers of PEN (Zhang 2010). Synthesis of 2,6-DMN have been studied by many workers (Lin 2006). In the production of 2,6-DMN, the most important problem is to develop catalysts giving products with high selectivity and high conversion. In this study, the production of dimethyl naphthalene via disproportionation of 2-methyl naphthalene (2-MN) over Y zeolite catalyst was investigated. In the experiments a solution which’s molar composition was 1:1 2-MN:benzene was used. 2 cm3 of catalysts were placed in the reactor and this catalysts were activated and tested under nitrogen medium. In exit of the reactor, obtianed gas products were condensed with a condenser circulating cold ethylene glycol. Liquid products obtained in condenser were analysed with GC-MS which has 60 meter capilar column
Anahtar Kelimeler
Polyethylene naphthalate (PEN) 2 6-Dimethyl naphthalene (2 6-DMN) Y Zeolite Disproportionation
Kaynakça
- Li, C., Li, L., Wu, W., Wang, D., Toktarev, A. V., Kikhtyanin, O. V. and Echevskii, G. V. (2011). Highly Selective Synthesis of 2,6-Dimethylnaphtalane Over Alkaline Treated ZSM-12 Zeolite, Procedia Engineering, 18, 200-205.
- Lin, L., Fang, Y. and Hu, H. (2006). Selective Synthesis of 2,6-Dimethylnaphthalene by Methylation of 2-Methylnaphthalene with Methanol on Zr/(Al)ZSM-5, Catalysis Communications, 7, 255-259.
- Lucas, N., Bordoloi, A., Amrute, A.P., Kasinathan, P., Vinu, A., Bohringer, W., Fletcher, J.C.Q. and Halligudi, S.B. (2009). A Comparative Study on Liquid Phase Alkylation of 2-Methylnaphthalene with Long Chain Olefins using Different Solid Acid Catalysts, Applied Catalysis A: General, 352, 74-80.
- Matsuda T., K. Yogo, T. Nagaura, Kikuchi E. (1990). Disproportionation of Methylnaphthalenes Over Zeolite Cataysts, Sekiyu Gakkaishi, 33, 214-220.
- Millini, R., Frigerio, F., Bellussi, G., Pazzuconi, G., Perego, C., Pollesel, P. and Romano, U. (2003). A Priori Selection of Shape-Selective Zeolite Catalysts for the Synthesis of 2,6-Dimethylnaphtalane, Journal of Catalysis, 217, 298-309.
- Park, J. N., Wang, J., Hong, S. I. and Lee, C.M. (2005). Effect of Dealumination of Zeolite Catalysts on Methylation of 2-Methylnaphthalene in a High-pressure Fixed-bed Flow Reactor, Applied Catalysis A: General, 292, 68-75.
- Pu, S. B. and Inui, T. (1996). Synthesis of 2,6-Methylnaphthalene by Methylation of Methylnaphthalene on Medium and Large-pore Zeolite Catalysts, Applied Catalysis A: General, 146, 305-316.
- Robert B. and Wincenty S. (2003). Disproportionation of Isopropylnaphtalene on Zeolite Catalysts, J. of Catalysis, 220, 13-22.
- Shuo C. and George M. (2004). Study of Coke and Coke Precursors During Catalytic Cracking of n- hexane and 1-hexene Over Ultrastable Y zeolite, Catalysis Letters, 96.
- Tsutsui, T, Ljichi, K., Inomata, T., Setiadi, Kojima, T. and Sato, K. (2004). Enhancement of Conversion and Selectivity by Temperature-swing Unsteady-state Reaction Method in Shape-selective Methylation of Methylnaphthalene with ZSM-5, 59, 3993-3999.
- Zhang, C., Guo, X., Song, C., Zhao, S. and Wang, X. (2010). Effects of Steam and TEOS Modification on HZSM-5 Zeolite for 2,6-Dimethylnaphthalene Synthesis by Methylation of 2- Methylnaphthalene with Methanol, Catalysis Today, 149, 196-201.
- Zhang Y., Junpeng F., Zhanjun L. and Xuekuan L. (2014). Improved Stability and Shape Selectivity of 2,6-Dimethylnaphthalene by Methylation of with Methanol on Modified Zeolites, Modern Research in Catalysis, 3, 19-25.
- Zhao, Z., Wang, W., Qiao, W., Wang, G., Li, Z. and Cheng, l. (2006). HY Zeolite Catalyst for Alkylation of α-Methylnaphthalene with Long-chain Alkenes, Microporous and Mesoporous Materials, 93, 164-170.
Ayrıntılar
| Birincil Dil | Türkçe |
|---|---|
| Bölüm | Araştırma Makalesi |
| Yazarlar | |
| Yayımlanma Tarihi | 13 Kasım 2015 |
| Yayımlandığı Sayı | Yıl 2015 Cilt: 16 Sayı: 2 |
