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CAS号 [6343-76-6] 生产工艺。 N,N’-二苯基氰基甲脒 |
CAS号 [6343-76-6] 生产工艺。 N,N’-二苯基氰基甲脒
CAS名:Methanimidamide, 1-Cyano-N,N’-diphenyl-, 历史参考文献:Beil. 待检索。
用途:还原蓝1。还原黑2。颜料蓝66。 LookChem网登录5家。 反应类别:硫氰代。
BIOS 986, 190-191.(=胶卷PB 77764)。N,N’-Diphenylicyanoformamidine (Hydrocyancarbodiphenylimid) (I.G.
Hoechst).
反应式:本人有加注。英国人译自德文,无资料来源。[102-08-9] 已上网。所抄录的PB报告号,未该对!
Materials usages per batch: 每批投料量:
Thiocarbanilide 20 6 kg. (M.
P. 153℃).。
Soap 3 kg.。
Basic lead carbonate 250 kg.
(white lead).
Sodium cyanide 57 kg. = 47 kg.
100%.。 Caustic soda 20kg.
Plant Description: 设备:
1. 500 l. Conche with explosion
proof motor. (500 升壳型混合器,装有防爆马达)。
2. 4.5 cu. m. reaction kettle,
homogeneously lead-lined, with steam/ water jacket and spade agitator at 30
r.p.m.。 3. Monstre press.
Plant Capacity: 设备生产能力:
3 bx./week = about 540 kg. = about 25 connes per year hydroimid rein. (抄注: Hydroimid = 二苯基甲脒)
Process Description: 操作步骤:
206 kg. thiocarbanilide, 3 kg. soap and 250 kg. white lead are mixed
in a conche in three lots and added to 500 l. water in the batch kettle. 57 kg. sodium cyanide and 20 kg. caustic soda
are added. Cool to 10℃. and stir for 24 hours at 10-12℃.
Test: Filter 100 g., wash
neutral and dry. Extract part of the
dried material with hot alcohol, filter and treat the filtrate with white lead
and a little sodium cyanide at boiling.
The white lead must remain white and form no lead sulphide. If thiocarbanilide is still present filter
another sample. If the filtrate gives no
Berlin Blau reaction insufficient sodiaum cyanide is present. Extract the nutsche residue with excess hot
2% hydrochloric acid and filter. If no
lead sulphitde is formed on adding sodium sulphide to the filtrate there is a
deficiency of white lead. If
thiocarbanilide is still present and sufficient sodium cyanide and white lead
are present, add more caustic soda.
When the reaction is complete add 5 kg. ferrous sulphate as 10% water
solution.
Test: To a half test tube full
of the filtrate from a sample add 2-3 drops potassium iodide solution (10%) and
then 1 drop silver nitrate 1% solution.
If a precipitate forms there is no excess sodium cyanide.
Filter on a press or nutsche and wash neutral (12 hours). Dry the press cake in a vacuum dryer at 69-70℃. taking precaustions against firing – release vacuum with nitrogen. Clean the oven after every drying. The product is a black powder.
Yield: About 440 kg. of a mixture of hydroimide and lead sulphide =
186 kg. hydroimid pure.= 87 % v.E. = 90% theory.
Actual Plant Yields: 实际设备产率:1935
92.2%; 1936 90.2%.
Pure: 精制: Crude about 1,050 kg. – 21/3
bx. – 420 kg. 100%. Ethylene dichloride
8,000 kg. (free from chloroform). Plant
Description: 设备:略。
Process Description: 精制操作步骤:
Extract the crude materials in 11 parts by decantation from the lead
sulphide. The first three extractions
are converted to anilide, and the next eight are used for the next
extraction. After the eleventh
extraction the lead sulphide is transferred to the distillation vessel and the
ethylene dichloride driven off with steam and the lead sulphide filtered in a
press. The lead sulphide was sold to
white lead works. The distilled ethylene
dichloride was separated from water and pumped to storage. There were no difficulties in the
manufacture, but during cold weather the extraction vessel was heated with warm
water to prevent crystallization. The
product was crystalline and of M.P. 138℃. The hydroimid content of the eleventh
extraction must not exceed 0.2%.
Yield: 407 kg. pure as about an 8% solution in ethylene dichloride. 643 kg. lead sulphide.
细田豊 《理论制造染料化学》。技報當 出版。 1957年。 P. 471. N,N’-Diphenylcyanoformamidine
(Hydrocyancarbodiphenylimid).
チオカ-バニリド206 kg,石ケン3 kg,盐基性碳酸铅250 kg,水500 lをまぜ, NaCN 57 kgとNaOH 20 kgを加え,10-120で24 h搅拌する。硫酸第一铁5 kgを10% 溶液として加え,滤洗,60-700で真空亁燥する。440 kg = 186 kg イミドとPbSの混合,收率90%。
3 m3コニカル分离机で,上记粗制品1050 kgをジクロルエチレン8 tで11 回に分けて抽出する。初めの3回はアニリドの制造に用い後8回は次の抽出に用いる。残つたPbSの部分は水蒸汽蒸馏した後滤過し铅白の制造に向ける。407 kg pure(8%溶液),硫化铅643 kg。
张澍声《精细化工中间体及产品生产工艺》。 2006年。 P. 687. 二甲基氰基甲脒。 译自BIOS 986, 190-192.
在带防爆马达的500 L 壳型混合器中,分三批加入206 kg 对二苯硫脲,3 kg 肥皂和250 kg 铅白,并进行混合,然后加到装有500 L水的4500 L反应釜中,加入57 kg 氰化钠和20 kg 氢氧化钠,冷却到10℃,在10-12℃搅拌反应24小时。
取样检验:取100 g样品,过滤,洗至中性并干燥。用热乙醇萃取部分干燥产品,过滤,洗涤,用铅白和少量氰化钠在沸腾下处理。铅白必须保持白色,并且不形成硫化铅。如果存在二苯硫脲,过滤另一样品。如果滤液没有普鲁士蓝反应,表明氰化钠是不充分。用过量2% 热盐酸萃取滤饼并过滤。如果加硫化钠到滤液中不形成硫化铅,则是缺少铅白。如果二苯硫脲仍然存在,并有足够的氰化钠和铅白,加入更多氢氧化钠溶液。
反应完成后加入5 kg 硫酸亚铁(做成10 % 水溶液)。
取样检验:试管的一半体积充满滤液样品,加入2-3 滴10% 碘化钾溶液,然后加入1滴1% 硝酸银溶液。如果形成沉淀,就没有过量氰化钠。
压滤或抽滤,并洗至中性(12小时),在60-70℃真空干燥滤饼。注意防火,用氮气释放真空,每次干燥后清洗干燥箱。
产品为黑色粉末。约440 kg 二苯基氰基甲脒和硫化铅的混合物,相当于186 kg 纯二苯基氰基甲脒,收率90%。
粗品精制:
用8000 kg 二氯乙烷(不含氯仿)分11份萃取1050 kg 粗产品,是从硫化铅中倾析出来的。第一份萃取物转化为酰替苯胺,其后的8份用于下次萃取。第11次萃取后硫化铅转移到蒸馏锅中,用蒸汽赶出二氯乙烷,硫化铅压滤。硫化铅出售给铅白工厂。蒸出的二氯乙烷与水分离,贮存供下次应用。在冷天时,萃取锅要用热水加热防止结晶。 产品熔点138℃。
二苯基氰基甲脒含量在第11次萃取中应不超过0.2%。 得到407 kg 纯的二苯基氰基甲脒,为8% 的二氯乙烷溶液。另有643 kg 硫化铅。
PB 73377, 2178-2183. Hydroimide
crude and pure. 未抄录,上海染料研究所有放大本。
PB 73484, 1073-1075. “Hydoimid”crude and pure. 1934年德文生产工艺,未抄录。中科院图书编号:MO 3527.
国内染料专业出版物。
何岩彬 主编 《染料品种大全》。沈阳出版社 出版。 P. 1851-2038. “染料中间体及可合成的染料”
因为还原染料结构式中,不含染料合成工艺,所以漏缺中间体。请读者按分子式增补在p. 1988上。
陈忠源 2019年10月31日星期四。
文章作者:陈忠源 |