Chinese Academy of Sciences

Sabic Global Technolgoies B.v.

Yunpeng Xu

Zhongmin Liu

Danhua Yuan

Jiacheng Xing

Kunyuan Wang

Wei Huang

Dawei He

Haitao Liu

Mingzhi Li

Peng Xie

Guangye Liu

Zhijia Song

Xinglong Dong

Yanan Liu

Changmin Bai

Zhaoan Chen

Shiying Li

The present application discloses a method for preparing a hierarchical porous TS-1 molecular sieve, which uses a silicon-titanium ester polymer as both titanium source and silicon source. In the method, silicon and titanium are uniformly connected to a same polymer, and the hydrolysis rates thereof are equivalent during hydrolysis, which can prevent TiOprecipitation and reduce the generation of non-framework titanium. Further, the silicon-titanium ester polymer is not only used as both silicon source and titanium source, but also can be used as mesoporous template in the synthesis process. The obtained TS-1 molecular sieve has mesoporous structure with narrow pore size distribution, which plays an important role in promoting the application of TS-1 molecular sieve in the field of catalysis.

Method for preparation of hierarchical TS-1 molecular sieve

The present application discloses a method for preparing a hierarchical porous TS-1 molecular sieve comprising using a silicon-titanium ester polymer as both titanium source and silicon source. In the method, silicon and titanium are uniformly connected to a same polymer, and the hydrolysis rates thereof are equivalent during hydrolysis, which can prevent TiOprecipitation and reduce the generation of non-framework titanium. Further, the silicon-titanium ester polymer is not only used as both silicon source and titanium source, but also can be used as a mesoporous template in the synthesis process. The obtained TS-1 molecular sieve has mesoporous structure with narrow pore size distribution.

Method for preparing TS-1 molecular sieve with hierarchical pores

The present application discloses a method for preparing polyester polyol comprising performing transesterification of raw materials containing inorganic oxyacid ester and polyhydric alcohol to obtain the polyester polyol. The polyester polyol obtained by the method described in the present application has higher heat resistance.

Method for preparing polyester polyol

A process for converting naphtha, lower olefin, light aromatic hydrocarbon, and gasoline with a high octane number by combining catalytic cracking of naphtha with steam cracking of lower alkane and catalytic cracking of higher alkanes and higher olefins. The process increases the yield of product with high value and significantly decreases the yield of low value product. At the same time, the power consumption is decreased as a whole since most reactants are converted in catalytic cracking at a lower temperature.

Process for converting naphtha

Provided is a method for preparing a Y type molecular sieve having a high silica-to-alumina ratio, comprising: mixing deionized water, a silicon source, an aluminum source, an alkali source, and a tetraalkylammoniumcation source as a template agent to obtain an initial gel mixture; after aging the initial gel mixture at an appropriate temperature, feeding the gel mixture into a high pressure synthesis kettle for crystallization; separating a solid product, and drying to obtain the Y type molecular sieve having a high silica-to-alumina ratio. The method provides a phase-pure Y type molecular sieve having a high crystallinity, the SiO/AlOthereof being not less than 6.

Method for preparing Y type molecular sieve having high silica to alumina ratio

A method for preparing a NaY molecular sieve having a high silica-to-alumina ratio, wherein deionized water, a silicon source, an aluminum source, an alkali source, and ILs as a template agent are mixed to obtain an initial gel mixture; the initial gel mixture is maintained at a proper temperature and aged, then fed into a high pressure synthesis kettle for crystallization; the solid product is separated and dried, to obtain the NaY molecular sieve having a high silica-to-alumina ratio, wherein the ILs is a short-chain alkylimidazolium ionic liquid, the template agent is less volatile, and the resultant high-silicon Y molecular sieve has a high crystallinity and a silica-to-alumina ratio of 6 or more.

Method for preparing NaY molecular sieve of high silica-alumina ratio and product thereof

The present invention relates to a method for producing cresol from phenol and methanol via gas phase alkylation, in which phenol and methanol are preheated and mixed with diluent gas, then the mixture continuously go through a catalyst bed comprising the catalyst for alkylation of phenol with methanol, to produce cresol by gas phase reaction at the reaction temperature of 200&#x2dc;500&#xb0; C. and the weight hourly space velocity of 0.5&#x2dc;20 h. The catalyst for alkylation of phenol with methanol is obtained by modification steps and using ZSM-5 zeolite, MCM-22 zeolite or Beta zeolite as an active composition. Using phenol and methanol as feedstock, the cresol selectivity can reach to 90%, and the p-cresol selectivity can reach to 58%. The catalyst is environmental friendly and non-corrosive to the equipment with a good stability and a broad prospect in industrial application.

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Dalian, China

Yunpeng Xu