CAS号 [138911-67-8] 生产工艺。 6-硝基邻氨基甲苯-4-磺酸
CAS名:Benzenesulfonic acid, 3-amino-4-methyl-5-nitro- 历史参考文献:Beil. 14, 730.
用途:有机合成。LookChem网未登录,数量是零。 反应类别:二个硝基部分还原。
BIOS 1153, 191-193.(=胶卷PB 85687)。 6-Nitro-o-toluidine-4-sulphonic
acid. (Leverkusen)。 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。(因为本人收录的胶卷目录有限!)。
Outline: 2,6-Dinitrotoluene-4-sulphonic acid
is reduced with NaSH in the presence of MgO.
Plant: 设备:抄录不再分项。 1 Iron reduction vessel, 7,000 l. with hot and
cold cooling coils, gate stirrer, 52 r.p.m.。
1 Small filter press。
2 Iron vats of 1,000 l., with
lead cooling coils。 1 Centrifugal pump。
1 Rubber-lined nutsche, 4 cu.m.,
tile-lined。 1 H2S
absorption vessel。
Materials: 所投物料: 抄录不再分项。 2,6-Dinitrotoluene-4-sulphonic
acid (paste) Approx. 1,000 kg. ≈120 kg. NaNO2 。
Magnesium sulphate crystals 275
kg。 Soda ash
40 kg。 Sodium hydrogen sulphide 20.2% 610 kg. ≈123 kg. H2S。
Sulphuric acid 50% 100 kg。
Caustic soda liquor 30% 250 kg。
Hydochloric acid 19.50Be’ 600 l.
Process:
操作步骤: The reduction vessel is charged with 3,700 l.
of water, and about 20 kg. of soda is added, together with 11/2 batches (≈120
kg. NaNO2) of the 2,6-dinitrotoluene-4-sulphonic acid. The amount of soda should be just not
sufficient to neutralize the mixture. The
crystalline magnesium sulphate is next added and the sodium hydrogen sulphide siphoned
in. The temperature is not allowed to exceed
35℃.
When reduction is complete, a violet coloration
should be obtained with sodium nitroprusside and after 1 hour an aqueous sample
is tested in this manner. The end point
usually is reached when about 610 kg. of NaSH (≈123 kg. H2S) have been added. An excess of NaSH must be avoided. After this stage has been reached, the
product is slowly neutralized with 50% sulphuric acid and the liberated H2S is
absorbed. The product is now filtered
from dirt, sulphur, MgO, etc., and the clear liquors returned to the vat and
made strongly acid with hydrochloric acid.
The crude product is precipitated and is
filtered off, and well washed. The paste
is taken back to the vat with 2,000 l. of water and about 250 kg. of caustic
liquor at 45-50℃. At higher temperatures the sulphur goes back
into solution. It is again filtered from
sulphur and magnesia, the filtrate made acid with more hydrochloric acid (200
l.), the product filtered at 20℃., washed, and dried at 60-70℃.
Yield: 400 kg. paste ≈80 kg. NaNO2 i.e. 65%
theory. Diamine formation 4.8%. Note: In order to avoid using excess caustic
soda when redissolving, it is better to complete the neutralization with 20 kg.
of soda ash. In this way the Mg is
precipitated in a better filterable form.
A drop when heated up should not show any turbidity.
张澍声 《精细化工中间体工业生产技术》1996年。 P. 60. 6-硝基邻氨基甲苯-4-磺酸。 译自BIOS 1153,
191.
在7000 L铁还原釜中加入3700 L水,约20 kg碳酸钠和相当于120 kg NaNO2的2,6-二硝基甲苯-4-磺酸滤饼(约1000 kg),碳酸钠的数量正好不足以中和混合物。加入275 kg结晶硫酸镁,吸入610 kg 20%硫氢化钠溶液(相当于123 kg H2S),温度不超过35℃。
当还原完成后,遇硝普酸钠(Sodium nitroprusside)应为紫色溶液,1小时后水溶液样品用这种方法检验。当加入约610 kg硫氢化钠时,通常可以达到终点,必须避免硫氢化钠过量。这一阶段已经达到后,产品用50% 硫酸缓缓中和,并将释出的硫化氢吸收。产品过滤与杂质,硫和氧化镁等分离,清晰的溶液回到容器中,加盐酸使呈酸性。 粗产品沉淀出来,过滤,很好洗涤。将滤饼放回容器中,加入2000 L水和250 kg氢氧化钠溶液,加热到45-50℃。在较高温度下硫黄回到溶液中。再过滤分离硫和氧化镁。滤液用200 L盐酸酸化,产品在20℃过滤,在60-70℃干燥。得到400 kg滤饼,相当于80 kg 亚钠。收率为65%,约形成4.8% 二胺。
新年有所想:今天是“除夕”。最近又是讨论“垃圾分类”!一些垃圾还可以利用。上网已3年了,主要是介绍一些历史资料,也多次提出如何利用进口的历史资料。当然今天上网的资料已是过时的历史资料,用处不大。LookChem网也未登录。问题是为什么其CAS号是[138911-67-8]。再说,至少按单元反应类别,还是可供参考的!据本人所知,有的单位已把胶卷处理了,上海染料研究所,因为单位变动,其进口的胶卷和到北京放大复制的资料,也不知去向了?“垃圾”可以分类处理,为什么“进口资料”不可以分类处理?当然,我还在做,春节放假还会做下去,因为今后可以休息的时间是无限的!这是自然规律!正因为可以利用,所以我没有把过去的资料当废纸,而留到现在。今天仍要谢谢公司,当然你见到应该是2月11日了!
陈忠源 2019年2月4日星期一。除夕,继续清理资料!