CAS号 [778-94-9] 生产工艺。 3-硝基-4-氰基三氟甲苯
CAS名:Benzonitrile, 2-nitro-4-(trifluoromethyl)- 历史参考文献:待检索。
用途:还原蓝21。有机合成等。LookChem网登录生产与经营单位62家。 反应类别:Sandmeyer反应。
BIOS 1153, 158-159.(=胶卷PB 85687)。 3-Nitro-4-cyanobenzotrifluoride (“Nitril”). Hoechst). 英国人译自德文(无资料来源)。
反应式:本人有加注,暂未找到德文原件。请读者注意:萘-1,5-二磺酸的作用!
207.5 kg. of
3-nitro-4-aminobenzotrufluoride is diazotized in the usual way at ordinary
temperature with 350 kg. of 15% nitrosylsulphuric acid and the silution, after
diluting with 200 kg. of ice, poured into 300 kg. of water containing 465 kg.
of 72% naphthalene-1,5-disulphonic acid.
The addition compound is filtered off and pulled as dry as possible.
Meanwhile 250
kg. of copper sulphate crystals, 225 kg. of rock salt and 1200 kg. of water are
stirred together. When dissolved, 135
kg. of sodium bisulphite 380Be’ is added and the mixture boiled until no more
SO2 is evolved. To the still hot mixture
there is added 200 kg. of caustic soda liquor 360Be’. The egg-yellow mixture, which should react
only weakly acid or neutral, is cooled to 10℃. and mixed with a cyanide solution prepared
from 165 kg. of sodium cyanide. The
temperature rises, but not exceed 35℃. The
water-clear solution is now neutralized with 75 kg. of acetic acid 100%, 220
kg. of sodium bicarbonate added, and the whole cooled down to 5℃.
The diazo
compound is now pasted with water and stirred into the cuprous cyanide, keeping
the temperature at 5-10℃. After stirring one hour, it
is filtered and washed free from inorganic products. Yield = 147 kg. “Nitril”.
After removal
of the crude “Nitril”, the filtrate is fortified by the addition of 82.5 kg. of
sodium cyanide, 75 kg. of glacial acetic acid, and 225 kg. of sodium
carbonate. The strengthened solution may
be used three times. It is eventually
destroyed with 90 kg. of sodium sulphide and run to drain.
细田豊 《理论制造染料化学》 1957年。 P. 504. 3-ニトロ-4-シアノ- ベンゾトリフルオリド. 译自PB 85687.
3-ニトロ-4-アミノ化合物207.5 kg を15% ニトロジジルスルホン酸350 kgで常温でジアゾ化し冰200 kgでうすめた後水300 l + 72% ナフタリン-1,5-ジスルホン酸465 kgに注加し,附加化合物を滤過する。
硫酸铜结晶250 kg + NaCl
225 kg + 水1.2 tを溶し,NaHSO3 380Be’ 135 kgを加えSO2が出なくなるで煮沸し,NaOH 360Be’ 200 kgを加え100に冷しNaCN 165 kgを350以下で加え,酢酸75 kgで中和し,NaHCO3 220 kgを加え50に冷す。
ジアゾ化合物を水とペ- ストにして前记cuprous cyanide に5-100で加え,1 h 搅拌後滤洗する。 147 kg。
滤液はNaCN 82.5 kg,
酢酸75 kg およびNa2CO3 225 kgを追加して次回の反应に用い,かくして3回繰返した後Na2S 90 kgを加えて捨てる。
张澍声 《精细化工中间体工业生产技术》 1996年。 P. 67. 3-硝基-4-氰基三氟甲苯。 译自BIOS 1153, 156.
207.5 kg 3-硝基-4-氨基三氟甲苯在常温下用通常方法与350 kg 15% 亚硝酰硫酸重氮化,将重氮溶液用200 kg 冰稀释,倾入含有456 kg 72% 萘-1,5-二磺酸的300 kg 水中,将偶合物过滤,并尽可能抽干。 另将250 kg 硫酸铜结晶,225 kg食盐和1200 kg水一起搅拌。
溶解后加入135 kg比重1.355的亚硫酸氢钠溶液,混合物沸腾,直至不再有SO2释出。向仍保持热的混合物中加入200 kg 30% 氢氧化钠溶液,该蛋黄色化合物应呈弱酸性或中性,将其冷却到10℃。然后将其与165 kg 氰化钠制得的溶液混合,温度有所上升,但不可超过35℃。该清晰的溶液用75 kg 100% 醋酸中和,加入220 kg 碳酸氢钠,整个冷却到5℃。
重氮化合物用水打浆,搅拌加入到上述氰化亚铜溶液中,保持温度在5-10℃,搅拌1小时后,过滤,水洗至不含无机物。得到147 kg Nitril。
在除去粗品Nitril后,向滤液中加入82.5 kg 氰化钠,75 kg冰醋酸和225 kg 碳酸钠,使溶液强化。强化的溶液可以使用3次,最后用90 kg 硫酸钠破坏,排放。 抄注:本书是内部出版物。
抄注:未见国内有出版物对 [778-94-9] 进行报道.Do you known? Naphthalene-1,5-disulfonic acid: as stabilizer for
diazo solutions.
陈忠源 2018年9月10日