acetylation of anisole

Catalyst samples were recovered after various times on stream and the organic material which was retained in significant amounts on the zeolite was analysed by GC and GC/MS. Cu–Zn composite oxide catalysts were prepared by a co-precipitation method and used in the anisole acetylation reaction. The products were analyzed by a Shimadzu Gas Chromatograph GC-18 with FID (Column: Ultra-1 capillary column; Agilent Technologies, CA, USA). Table 1 gives the textural parameters of the MOR zeolite catalysts. do not need to formally request permission to reproduce material contained in this For reproduction of material from all other RSC journals and books: For reproduction of material from all other RSC journals. 0000005197 00000 n If you are the author of this article you do not need to formally request permission EXPERIMENTAL Acetylation of Anisole The reactions were carried out in the liquid phase both in a batch reactor at 60 in an inert atmosphere and in a 296 ACETYLATION OF ANISOLE OVER A HBEA ZEOLITE 297 fixed-bed reactor at 90 and a nitrogen flow of 12 ml/min. This indicates the leaching of Al atom locating at the acid site by the repetitive reactions, because the spectrum of the fresh MOR(200) (a) is not observable at 0 ppm and only tetrahedral framework of Al atom is detected at 57 ppm. Elemental analyses were per-. to reproduce figures, diagrams etc. How-. This result indicates that there is no amorphous silica formation from leaching Si atom during the reaction. lyst MOR(200). Kinetic measurements of the acetylation of anisole by acetic acid in the presence of boron trifluoride V. Gold and T. Riley, J. Chem. It is an ether.. 0000022720 00000 n The results of reusability by MOR(200) in Friedel-Crafts acylation of anisole (left) and powder-XRD charts of fresh (a) and after 30 times used MOR(200) (b) zeolite catalysts (right). x�[˒ܶ��+�J�$2M� I�"M�J\�$�&�E�Ici�H�����/�G9��d?H���\V���� �?�o�Of����4M�&�P;�����{�w�5�_����{Ӥ�޿–�v>�-_lh�z��X�z��s��1�-7���_ں1�ܼ6�0�/�Wƙ���� �ܦ���������|e��I��v��c��B�d�� n>�27?�`s��m�� ޟR�r�y�y���peZ�y�������R�J��$�۫ Solid- state 29Si magic angle spinning (MAS) NMR spectra, and 27Al MAS NMR spectra were recorded at ambient temperature by using 4 mm diameter zirconia rotor with a spinning rate of 6 kHz (ECA-500 NMR spectrometer, JEOL Ltd.). Other approaches have been also examined by using mesoporous catalysts [2] , MWW zeolitic material using nitrobenzene [10] , ZSM-5 zeolite [11] , ion-exchanged Y zeolite [12] [13] , clays [14] and resin composite silica catalysts [15] [16] [17] . 0000012313 00000 n Former studies have shown that HBEA exhibits a higher activity on the acetylation of toluene compared to HFAU, HMOR and HMFI, due to its large and interconnected channels , . Friedel-Crafts acylation of anisole by mordenite catalyst. 0000006180 00000 n or in a thesis or dissertation provided that the correct acknowledgement is given We use cookies to help provide and enhance our service and tailor content and ads. The product yield and selectivity of the isomers were estimated by GC compared with authentic samples. College of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing 211816, China Due to its high polarity, this reaction product is strongly retained in the large mesopore volume of the HBEA zeolite. 0000023012 00000 n 0000010880 00000 n Figure 4. We use cookies to help provide and enhance our service and tailor content and ads. Pore structure of mordenite zeolite [001] and [100] directions (left). These results obviously indicate that the reaction proceeds by high shape selective manner of mordenite zeolite catalysts, because mordenite has a straight pore channel composed by 12-membered ring along with [001] direction in Figure 2(left) [19] , thus it allows not only facile formation of the slimmest isomer (4-MA) but also to diffuse out smoothly rather than those of 2,6-ACMN. The crystal size and morphology were measured by field emission scanning electron microscopy (FE-SEM) (S-4800; Hitachi High-Technologies Co., Japan). (iv) Friedel - Crafts acetylation of anisole. Figure 3. 76 0 obj << /Linearized 1 /O 78 /H [ 1353 679 ] /L 563789 /E 438612 /N 13 /T 562151 >> endobj xref 76 45 0000000016 00000 n

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