一二三四区视频,亚洲少妇熟女色,日本久热无码视频网,欧美国产日韩大尺度,亚洲a视频,久久少妇一区二区,日韩999无码视频,刺激久久久久久久,啊啊啊啊不要啊在线

Welcome to chemicalbook!
Chinese English Japanese Germany Korea
010-86108875
Try our best to find the right business for you.
Do not miss inquiry messages Please log in to view all inquiry messages.

Welcome back!

ChemicalBook CAS DataBase List ETHANOL-D
925-93-9

ETHANOL-D synthesis

9synthesis methods
ETHANOL-D is a deuterated NMR solvent,it can be prepared by reacting tetraethylorthosilicate with deuterium oxide.
-

Yield:-

Reaction Conditions:

with [D]-sodium hydroxide;water-d2 at 75;Inert atmosphere;

Steps:

5-6

Add 60mL (0.608mol, purity 99%) of ethyl acetate and 60mL of NaOD solution with a concentration of 11mol/L (containing 0.66mol of NaOD, the abundance of NaOD is 99.9%) into a flat-bottomed flask with a capacity of 500mL, and then add 111g (5.54 mol, abundance 99.9%) of heavy water, filled with nitrogen, stirred and refluxed at 75°C until ethyl acetate was completely hydrolyzed, the stirring speed was 550r/min, then the reaction product was transferred to an atmospheric distillation device, and replaced with nitrogen in the device The air, and then heated to collect the distillate at 165 ° C,Obtain the alcohol-water mixture of 164.4g, then the alcohol-water mixture is heated and collected the distillate under 85 , obtains the monodeuterated ethanol of 88.8g (the deuterated rate is 68.9%, and purity is 27.8%, and heavy water content is 72.2% , yield by ethanol is 51.9%, deuterium atom utilization rate is 64.7%), and the remaining liquid of distillation is reclaimed, obtains the recovery heavy water of 69.1g.

References:

CN115572211,2023,A Location in patent:Paragraph 0056-0065

ETHANOL-D Related Search:

嘉黎县| 阜宁县| 静乐县| 卓资县| 阜阳市| 沿河| 凯里市| 佛山市| 和田县| 凤凰县| 香河县| 昌乐县| 清涧县| 土默特左旗| 阿瓦提县| 抚顺县| 桃江县| 韶山市| 盈江县| 若羌县| 寻乌县| 达州市| 增城市| 上蔡县| 宝山区| 朝阳县| 灵山县| 绥阳县| 嵊泗县| 灵石县| 广饶县| 四川省| 济南市| 资溪县| 蓝田县| 敦煌市| 金溪县| 彭山县| 禄劝| 获嘉县| 东港市|