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 Disperse Blue 14
2475-44-7

Disperse Blue 14 synthesis

5synthesis methods
1,4-Dihydroxyanthracene-9,10-dione?by under pressure,?With aqueous Methanamine?and sodium hydrosulfite or zinc processing. Leuco sulfate nitrobenzene oxidation or thermal
-

Yield:2475-44-7 95.1%

Reaction Conditions:

with 1-methyl-1H-imidazole;tetrafluoroboric acid;bromobutyric acid in methanol at 50 - 55;Large scale;Temperature;

Steps:

1-5 Example 1:
This embodiment provides a method for producing low-pollution diarylamino anthraquinone solvent blue 78 dye. The reaction mechanism is shown in Figure 1, and the process flow is shown in Figure 2, which includes the following steps:(a) Add 800 kg of methanol and 800 kg of N-methylimidazole to the reaction vessel, then slowly add 1200 kg of 4-bromobutyric acid dropwise under stirring and cooling, and slowly dropwise add 50% sodium hydroxide solution under stirring and cooling at 50°C To pH>9, add 50 kg of fluoroboric acid, stir for 5 hours to dissolve and then remove methanol under reduced pressure to obtain the first mixture;(b) Raising the temperature of the above-mentioned first mixture to 50°C,Put in 1,4-dihydroxyanthraquinone 1,200 kg,1,4-Dihydroxyanthraquinone leuco body 300 kg, monomethylamine 580 kg,Stir evenly and then continue to heat up to 55°C and react to the end point; use HPLC to determine the end point of the reaction; then lower the temperature to 35°C and open the bottom valve to discharge the material into the filter tank, drain the mother liquor to obtain a filter cake and filtrate;(c) Wash the filter cake with 500 kg of hot water, collect the washing liquid and the filtrate, and distill to recover the solvent; then wash the filter cake with hot water at 90-100°C until it is neutral, then dry, crush, and package 1582 kg of the finished product of Solvent Blue 78 was obtained; the yield was 95.1%. △C 2.714 is slightly brighter, and the pressure is 0.23.

References:

CN112661658, 2021, A Location in patent:Paragraph 0024-0040

FullText

Disperse Blue 14 Related Search:

新竹市| 阜新市| 兴仁县| 修文县| 宝坻区| 永定县| 伊川县| 遵义市| 吴江市| 建湖县| 井冈山市| 巨野县| 儋州市| 永城市| 原阳县| 永定县| 巫山县| 荥阳市| 南江县| 武平县| 英山县| 邢台县| 禄丰县| 大庆市| 那曲县| 绥棱县| 阿拉善左旗| 安远县| 武定县| 正定县| 腾冲县| 寿阳县| 诸暨市| 珠海市| 墨脱县| 宁都县| 青龙| 军事| 台中县| 金塔县| 揭阳市|