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    • 1. 发明公开
    • 페닐유레아로부터 4-니트로디페닐아민 및 4-니트로아닐린을 제조하는 방법
    • 从苯乙烯生产4-硝基苯胺和4-硝基苯胺
    • KR1020010009318A
    • 2001-02-05
    • KR1019990027623
    • 1999-07-08
    • 금호석유화학 주식회사
    • 주영제김진억황금의이지윤
    • C07C201/08
    • PURPOSE: A process for preparing the title compound by reaction of phenylurea capable of easily manufacturing from urea and aniline with nitrobenzene using an alkali metal base such as sodium hydroxide or an alkali earth metal base is provided, which can prevent generation of ortho compounds such as 2-NDPA and phenazine and azoxybenzene as byproducts by passing oxygen and air through a reaction atmosphere. The process can also generate no harmful material such as chlorine and reduce an amount of waste. CONSTITUTION: In a process for manufacturing 4-nitrodiphenylamine and 4-nitroaniline using an aromatic hydrogen nucleophilic reaction, phenylurea and nitrobenzene are reacted at 20 to 150deg.C in the presence of a base and a polar organic solvent. The base is used in an amount of 1 to 10 times by molar ratio based on the phenylurea and selected from sodium hydroxide, sodium hydride, potassium hydride, potassium hydroxide, t-butoxy potassium and sodium amide.
    • 目的:提供一种使用碱金属碱如氢氧化钠或碱土金属碱使能够容易地从尿素和苯胺与硝基苯制备的苯脲反应制备标题化合物的方法,其可以防止产生诸如 2-NDPA和吩嗪和偶氮氧苯作为副产物,通过氧气和空气通过反应气氛。 该方法也不会产生有害物质如氯,并减少浪费。 构成:在使用芳香族氢亲核反应的4-硝基二苯胺和4-硝基苯胺的制造方法中,在碱和极性有机溶剂的存在下,使苯脲和硝基苯在20〜150℃下反应。 碱的用量为1〜10倍,基于苯脲,选自氢氧化钠,氢化钠,氢化钾,氢氧化钾,叔丁氧基钾和氨基钠。
    • 2. 发明公开
    • 요소와 니트로벤젠으로부터 4-니트로소아닐린을 제조하는방법
    • 从尿素和硝基苯中制备4-硝基苯胺的方法
    • KR1020000017757A
    • 2000-04-06
    • KR1019990050965
    • 1999-11-16
    • 금호석유화학 주식회사
    • 주영제김진억원정임황금의
    • C07C209/02
    • C07C209/00C07C211/52
    • PURPOSE: A preparation method of 4-nitrosoaniline by reacting urea and nitrobenzene with a base in a polar solvent is provided which generates almost no side-products and has a short reaction time and needs not special device for anhydrous state. CONSTITUTION: 4-Nitrosoaniline is manufactured by reacting urea and below 1 mole ratio of nitrobenzene based on urea with 1-10 mole ratio of base based on urea in a polar solvent at room temperature to 150°C. The polar solvent is selected from a mixture solvent incorporated an organic solvent selected from dimethylsufoxide, dimethylformamide, N-methyl-2-pyrrolidone or xylene, and dioxane into dimethylsulfoxide. The base is selected from NaOH, KOH, NaH, t-BuOK and TMA. The compound is useful as basic raw material for aramid, a functional fiber having chemical resistance, heat resistance and high strength.
    • 目的:提供在极性溶剂中使尿素和硝基苯与碱反应的4-亚硝基苯胺的制备方法,几乎​​不产生副产物,反应时间短,不需要特殊的无水状态装置。 构成:4-硝基苯胺是通过尿素和低于1摩尔比的硝基苯(基于尿素)与1-10摩尔的碱(基于尿素)在极性溶剂中在室温至150℃下反应制得的。 极性溶剂选自掺入选自二甲基亚砜,二甲基甲酰胺,N-甲基-2-吡咯烷酮或二甲苯和二恶烷的有机溶剂和二恶烷的混合溶剂。 碱选自NaOH,KOH,NaH,t-BuOK和TMA。 该化合物可用作芳族聚酰胺的基本原料,芳族聚酰胺是具有耐化学性,耐热性和高强度的功能性纤维。