Synthesis of poly(oxymethylene) dimethy ethers catalyzed by acidic functionalized ionic liquids

LI Wei-min; ZHAO Qiang; ZUO Tong-mei; WEI Guo-hui; LU Zhao-yang; PU Guo-jia

Volume 42 Issue 04

Apr. 2014

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Article Navigation > Journal of Fuel Chemistry and Technology > 2014 > 42(04): 501-506

LI Wei-min, ZHAO Qiang, ZUO Tong-mei, WEI Guo-hui, LU Zhao-yang, PU Guo-jia. Synthesis of poly(oxymethylene) dimethy ethers catalyzed by acidic functionalized ionic liquids[J]. Journal of Fuel Chemistry and Technology, 2014, 42(04): 501-506.

Citation:

LI Wei-min, ZHAO Qiang, ZUO Tong-mei, WEI Guo-hui, LU Zhao-yang, PU Guo-jia. Synthesis of poly(oxymethylene) dimethy ethers catalyzed by acidic functionalized ionic liquids[J]. Journal of Fuel Chemistry and Technology, 2014, 42(04): 501-506.

Citation:

LI Wei-min, ZHAO Qiang, ZUO Tong-mei, WEI Guo-hui, LU Zhao-yang, PU Guo-jia. Synthesis of poly(oxymethylene) dimethy ethers catalyzed by acidic functionalized ionic liquids[J]. Journal of Fuel Chemistry and Technology, 2014, 42(04): 501-506.

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Synthesis of poly(oxymethylene) dimethy ethers catalyzed by acidic functionalized ionic liquids

School of Petro Chemical Engineering, Changzhou University, Changzhou 213164, China

Received Date: 2013-08-15
Rev Recd Date: 2013-10-24
Publish Date: 2014-04-30

Abstract

Abstract

Poly(oxymethylene) dimethyl ethers (PODE n, n>1) were synthesized by the condensation of trioxymethylene (TR) and methanol (MeOH) over the functionalized ionic liquids like [Hnmp]HSO₄, [Hnmp]H₂PO₄, [Hnmp]PTSA and [PyN(CH₂)₃SO₃H]HSO₄; the effects of the catalyst amount, raw materials ratio, temperature, pressure and time on the reaction behaviors were investigated. The results showed that the catalytic activity of ionic liquid is related to its acidity. [PyN(CH₂)₃SO₃H]HSO₄ exhibits the highest catalytic activity; under the optimum reaction conditions, i.e. [PyN(CH₂)₃SO₃H]HSO₄ amount of 2.0%, molar ratio of MeOH to TR of 2.0, 110 ℃, 2.0MPa and reaction time of 6h, the conversion of TR and selectivity to PODE_3~8 reach 97.69% and 32.54%, respectively. Moreover, the ionic liquid [PyN(CH₂)₃SO₃H]HSO₄ can be spontaneously separated from product phase after the reaction.
- ionic liquid,
- trioxymethylene,
- methanol,
- poly(oxymethylene) dimethy ethers

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References(14)

References

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