Patent
Method for preparing polyoxymethylene dimethyl ether from paraformaldehyde
Gao Xiaochen,Yang Weimin,Liu Zhicheng,Gao Huanxin +3 more
- 07 May 2014
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TL;DR: In this article, a method for polyoxymethylene dimethyl ether from paraformaldehyde was proposed, which solved the problem that the cost is relative high when triformol is adopted as a raw material to synthesize polyoxide-methylene-dimethyl ether.
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Abstract: The invention relates to a method for preparing polyoxymethylene dimethyl ether from paraformaldehyde, and mainly solves the problem in the prior art that the cost is relative high when triformol is adopted as a raw material to synthesize polyoxymethylene dimethyl ether. According to the invention, methanol, dimethoxymethane, and paraformaldehyde are adopted as raw materials, wherein the mass ratio of methanol : dimethoxymethane : paraformaldehyde is (0-10) : (0-10) : 1, wherein the quantities of methanol and dimethoxymethane cannot both be 0; the catalyst is chosen from at least one component of the following tombarthite modified solid superacid: SO4 /ZrO2-La2O3, SO4 /ZrO2-Ce2O3, Cl /TiO2-La2O3, Cl /TiO2-Ce2O3, Cl /Fe2O3-Ce2O3, SO4 /Al2O3-La2O3 or S2O8 /ZrO2-La2O3. The technical scheme excellently solves the problem, and can be applied to the industrial production of polyoxymethylene dimethyl ether.
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Citations
Patent
Method for producing PODE (polyoxymethylene dimethyl ethers) through paraformaldehyde
Yang Weimin,Gao Xiaochen,Gao Huanxin,Shi Zhu,Wang Can,Jian Zhou,Chen Jian +6 more
- 03 Feb 2016
TL;DR: In this paper, a method for polyoxymethylene dimethyl ethers (PODE) through paraformaldehyde was proposed, which solved the problem that a catalyst is low in reaction efficiency and the cost is relatively high.
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Patent
Method for synthesizing polyoxymethylene dimethyl ether through paraformaldehyde
Yang Weimin,Gao Xiaochen,Gao Huanxin,Shi Zhu,Liu Zhicheng,Yang Heqin,Jia Yinjuan +6 more
- 02 Mar 2016
TL;DR: In this paper, a method for synthesizing polyoxymethylene dimethyl ether through paraformaldehyde was proposed, which mainly solves the problems that catalysts in the past are low in reaction efficiency, and cost is high as trioxylene serves as a raw material.
References
Patent
Synthesis method of polyformaldehyde dimethyl ether
Feng Li,Weiliang Feng,Gao Huanxin,Hongmin Sun,Weimin Yang +4 more
- 04 May 2011
TL;DR: In this paper, a synthesis method for polyformaldehyde dimethyl ether with trioxymethylene as a raw material has been proposed, where methanol, methylal and paraformaldehyde are used as raw materials.
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Patent
Aluminium oxide catalyst for preparing dimethy ether by methanol gas phase dewatering
Zhigang Zheng,Zhijie Zhao,Xingjian Li,Ze Wang,Fan Zhang,Qingwei Guo +5 more
- 16 Jun 2010
TL;DR: In this article, an aluminum oxide catalyst used in the making of dimethyl ether by the gas phase dehydration of methanol is described, which has the advantages of moderate acidity, wide range of active temperature area, a small amount of carbon deposition, and high capability to prevent the alkaline materials from poisoning.
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Patent
Synthetic soybean oil-based polyol catalyst, preparation method and application thereof
Kang Maoqing,Nan Li,Wang Junwei,Yuhua Zhao,Yin Ning,Qifeng Li,Feng Yuelan,Zhen Dong +7 more
- 04 Jul 2012
TL;DR: In this article, a synthetic soybean oil-based polyol catalyst with a composition of SO4 /ZrO2-MOx was proposed, where SO4 is a sulfate radical.
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