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 Tiron
149-45-1

Tiron synthesis

1synthesis methods
-

Yield:149-45-1 73%

Reaction Conditions:

Stage #1:benzene-1,2-diol with sulfuric acid at 95; for 5 h;
Stage #2: with sodium hydroxide in water at 50;Product distribution / selectivity;

Steps:

1
Example 1: Sulfonation of Catechol in Concentrated H2S04 The sulfonation of catechol derived from biomass using concentrated sulfuric acid was followed as described in Example A with minor modifications. Into a 1 L RBF containing 682 g of concentrated (98%) sulfuric acid, was added 150 g of catechol at RT. The mixture was heated at 95°C for 5h. When the reaction mixture was cooled to 50°C, 232 g of 47% (by weight) NaOH solution in water was added dropwise via an addition funnel to the reaction mixture to precipitate l,2-dihydroxy-3,5- benzenedisulfonate sodium salt. Upon complete addition of NaOH solution, the reaction was cooled to 15-25°C and the precipitate was filtered through a Biichner funnel. The solid was washed with isopropanol (600 mL) and dried under vacuum at 60°C to yield 312 g (73% yield) of l,2-dihydroxy-3,5-benzenedisulfonate sodium salt as an off-white solid.

References:

DRATHS CORPORATION;FROST, John, W.;BUI, Vu WO2011/22588, 2011, A1 Location in patent:Page/Page column 8

FullText

Tiron Related Search:

布尔津县| 霍州市| 邯郸市| 张家港市| 城市| 江津市| 永济市| 中宁县| 三穗县| 庆安县| 图片| 张家口市| 兴宁市| 乌兰县| 陆川县| 云梦县| 拉孜县| 龙川县| 平乐县| 宜兰市| 健康| 阿勒泰市| 洛宁县| 洱源县| 祥云县| 辽宁省| 舒城县| 突泉县| 常宁市| 小金县| 砀山县| 东海县| 神池县| 寻甸| 潮州市| 三穗县| 桂阳县| 红安县| 南澳县| 陵川县| 望城县|