Nankai University

Chinese Academy of Geological Sciences

Guangzhou Marine Geological Survey

Hainan Hualon Pharmaceutical Co., Ltd.

Jinqiang Liang

Wei Huang

Peng Zhao

Annan Guo

Xiaohang Liu

Xiaoyang Li

Yongqin Zhang

Cheng Luo

Feng Peng

Jun Ying

Yuping Wang

Suiwei An

Beimei Liang

Qingchun Ni

A method for administering a composition for exploiting natural gas hydrates. The method includes the following steps: injecting the reagent A into the tube A; injecting the reagent B into the tube B; stretching the tube A and the tube B into a hydrate reservoir by using a reagent injection instrument; regulating a flow rate according to a proportion of each component; allowing the reagents to react at a preset reservoir position; and allowing water in the reservoir to participate in the reaction at the same time, wherein a reaction product is used for supporting the reservoir.

Composition for exploiting natural gas hydrates and application method thereof

The present invention relates to a reagent for exploiting natural gas hydrates, which includes a regent A and a regent B. The reagent A is PEG400-polyurethane prepolymer; the reagent B includes PEG400 and an initiator; and a volume ratio of the PEG400-polyurethane prepolymer, the PEG400 and the initiator is (1-3000):(1-1000):(1-2000). The reagent of the present invention has excellent performance and high stability, and can effectively 'replace' the 'water' of the natural gas hydrate; and moreover, the reaction is exothermic reaction to effectively increase the reaction rate, which reduces the energy loss on the one hand, and reduces the blockage of a gas passage caused by the secondary generation of the natural gas hydrates in a low-temperature high-pressure pipeline during transferring on the other hand.

Reagent for exploiting natural gas hydrates and application method thereof

Anti-infection levorotatory optically active compound (S-configuration) of prulifloxacin represented by the following formula (1) and preparation method thereof are disclosed. Said method utilizes levorotatory ulifloxacin as the raw material and the reaction is conducted in organic solvent in the presence of alkaline materials, wherein the reaction temperature is &#x2212;20&#xb0; C.&#x2dc;60&#xb0; C. and the reaction time is 15 minutes to 24 hours. 

Optically active compound of prulifloxacin for treating infection and preparation method thereof

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Guangzhou, China

Jinqiang Liang