Synthesis of polyoxymethylene dimethyl ethers over zeolite catalysts

CAO Jian; ZHU Hua-qing; WANG Hui; HUANG Li-zhi; QIN Zhang-feng; FAN Wei-bin; WANG Jian-guo

Volume 42 Issue 08

Aug. 2014

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Article Navigation > Journal of Fuel Chemistry and Technology > 2014 > 42(08): 986-993

CAO Jian, ZHU Hua-qing, WANG Hui, HUANG Li-zhi, QIN Zhang-feng, FAN Wei-bin, WANG Jian-guo. Synthesis of polyoxymethylene dimethyl ethers over zeolite catalysts[J]. Journal of Fuel Chemistry and Technology, 2014, 42(08): 986-993.

Citation:

CAO Jian, ZHU Hua-qing, WANG Hui, HUANG Li-zhi, QIN Zhang-feng, FAN Wei-bin, WANG Jian-guo. Synthesis of polyoxymethylene dimethyl ethers over zeolite catalysts[J]. Journal of Fuel Chemistry and Technology, 2014, 42(08): 986-993.

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Synthesis of polyoxymethylene dimethyl ethers over zeolite catalysts

1.
State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, China;
2.
University of Chinese Academy of Sciences, Beijing 100049, China

Received Date: 2014-01-27
Rev Recd Date: 2014-04-11
Publish Date: 2014-08-30

Abstract

Abstract

Synthesis of polyoxymethylene dimethyl ethers was carried out on HMCM-22, Al-YNU-1 and MOR zeolites by the condensation of trioxane and methanol or methylal. The crystal structures and surface acidity of the catalysts were characterized by XRD, SEM and NH₃-TPD. It was found that DMM_2~8 selectivity was influenced by the acid strength and density of zeolites and reaction conditions. HMCM-22 showed much higher selectivity to DMM_2~8 than Al-YNU-1 and MOR. Under the optimal conditions, the DMM_2~8 selectivity reached 65.1% and 90.6% in ME/TRIox and DMM/TRIox systems respectively. It was shown that the moderately strong acid sites were probably responsible for the formation of long chain DMM_n, while the strong acid sites werefor DMM.
- HMCM-22,
- polyoxymethylene dimethyl ethers,
- methylal,
- methanol,
- trioxane

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References(16)

References

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