本发明涉及一种制备Ｌ－肉碱的方法，其包括如下步骤；步骤１（如图）步骤２（如图）其中，步骤１采用不对称催化氢化反应，步骤２采用相转移反应、碱性催化剂和低温反应条件，从而大大提高了产物Ｌ－肉碱的收率，总收率高达７０％
[更多]
An electric field instrument comprises a detection device, a signal processing device and a data analysis device. The detection device sends electric field signals to the signal processing device; a movable sheet, a drive device thereof, two groups of fixed sheets and a sensor are arranged in the de.....
[更多]
The present invention relates to a carbon nanotube / nanoclay nano composite material and its preparation method, the method comprising the steps of: mixing a metal salt solution and nano clay to make the metal salt of nanoclay intercalated between layers, wherein The metal as a catalyst for the gro.....
[更多]
The invention discloses a catalytic asymmetric hydrogenation reaction. Of the present invention is the role of chiral catalyst, H2 of the prochiral unsaturated compounds to addition reaction to obtain the chiral product, wherein the solvent used in the reaction liquid polyethylene glycol compound. T.....
[更多]
Having a shape memory fabric finishing agent and its preparation method, which is to enhance the silicone-modified polyurethane resin emulsion, a crosslinking agent, deionized water in the catalyst under reaction and made. Wherein the silicone-modified polyurethane resin emulsion is to enhance the q.....
[更多]
| |< <- | [1] [2] [3] [4] [5] [6] [7] [8] [9] [10] [11] | -> >| |
