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Two-step salting-out extraction separation of 1,3-propanediol, involves dissolving soluble acidic inorganic salts in 1,3-propanediol fermentation broth, mixing hydrophobic organic solvent, oscillating, separating and extracting salt phase. 专利
申请日期: 2018-01-01, 公开日期: 2018-05-11
作者:  XIU Z LI Z YAN L SUN Y MU Y
收藏  |  浏览/下载:8/0  |  提交时间:2019/12/02
Mine rock drilling anti-reflection type gas plugging and drainage extraction method involves drilling coal seams to top or bottom plate rock body at set angle, connecting test probe, and pushing to designated pumping area. 专利
申请日期: 2018-01-01, 公开日期: 2018-03-06
作者:  LIANG Z SONG W ZHAO C MA T MA K QIA
收藏  |  浏览/下载:4/0  |  提交时间:2019/12/02
Ultra-low temperature environment based natural gas extraction recycling pressure energy temperature regulating system, has natural gas ejector realizes high speed jet injection, and vortex tube discharges hot gas to realize depressurizing. 专利
申请日期: 2018-01-01, 公开日期: 2018-04-20
作者:  ZHANG B GUO X
收藏  |  浏览/下载:5/0  |  提交时间:2019/12/02
Determining aflatoxin and flavoring agents simultaneously in vegetable oils based on liquid-liquid extraction-liquid chromatography-tandem mass spectrometry comprises e.g. liquid-liquid extraction and liquid-liquid distribution purification. 专利
申请日期: 2018-01-01, 公开日期: 2018-04-13
作者:  ZHAO H QU B JIANG J WANG Y
收藏  |  浏览/下载:6/0  |  提交时间:2019/12/02


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