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    • 4. 发明授权
    • Removal of nitrocresols from dinitrotoluene waste streams using fentons
reagent
    • 使用芬太斯试剂从二硝基甲苯废物流中除去硝基酚
    • US4604214A
    • 1986-08-05
    • US766849
    • 1985-08-16
    • Richard V. C. CarrCarl J. MartinRoland GonzalezThomas A. Albanese
    • Richard V. C. CarrCarl J. MartinRoland GonzalezThomas A. Albanese
    • C02F1/72C02F9/00C07C201/16
    • C07C201/16C02F1/722C02F2101/38C02F2103/36Y10S210/909
    • This invention relates to a process for removing trinitrocresols and picric acid contaminants from a wastewater stream generated in the production of nitroaromatics, particularly dinitrotoluene, by the mixed acid technique. The process involves contacting the crude dinitrotoluene generated by the mixed acid technique with an alkaline medium to generate an alkaline wash water containing water soluble nitrocresols and picric acid therein. This wastewater then, is separated from the organic component or may be recycled for contact with further quantities of crude dinitrotoluene product from the reactor. When the concentration of the water soluble salts of trinitrocresols and picric acid is of sufficient concentration, the wash water is treated with aqueous acid in sufficient proportion to reduce the pH to a level from 3-4. After pH adjustment, the medium is contacted with hydrogen peroxide and a ferrous ion under conditions to effect oxidation of a substantial portion of the trinitrocresol to carboxylic acid, nitric acid and carbon dioxide.
    • 本发明涉及通过混合酸技术从硝基芳族化合物,特别是二硝基甲苯的生产中产生的废水中除去三硝基甲酚和苦味酸污染物的方法。 该方法包括将由混合酸技术产生的粗二硝基甲苯与碱性介质接触,以产生含有水溶性硝基甲酚和苦味酸的碱性洗涤水。 然后,该废水与有机组分分离,或者可以再循环用于与来自反应器的另外量的粗二硝基甲苯产物接触。 当三硝基甲酚和苦味酸的水溶性盐的浓度足够浓度时,用酸水溶液以足够的比例处理洗涤水,将pH降至3-4。 在pH调节之后,使介质与过氧化氢和亚铁离子接触,以使大部分三硝基甲酚氧化成羧酸,硝酸和二氧化碳。
    • 7. 发明授权
    • Propoxylation and reductive alkylation of diethylenetriamine
    • 二亚乙基三胺的丙氧基化和还原烷基化
    • US5430190A
    • 1995-07-04
    • US259721
    • 1994-06-14
    • Richard V. C. CarrCraig R. Williams
    • Richard V. C. CarrCraig R. Williams
    • C07C209/26C07C213/04C07C213/08
    • C07C213/04C07C209/26C07C213/08
    • A one-pot reaction process for the coproduction of two polyurethane catalysts which comprises reacting excess diethylenetriamine (DETA) in a reaction vessel with propylene oxide in the presence of a hydrogenation catalyst under conditions and for a period of time to essentially completely react the propylene oxide to give a mixture of DETA and N-2-hydroxypropyldiethylenetriamine (HPDETA), adding formaldehyde and hydrogen to the reaction vessel, reacting the DETA and HPDETA with the formaldehyde and hydrogen under conditions to effect permethylation of the DETA and HPDETA to afford N,N,N',N',N"-pentamethyldiethylenetriamine (PMDETA), a polyurethane catalyst, and N-2-hydroxypropyl-N,N',N',N"-tetramethyldiethylenetriamine (HPTMDETA) a nonfugitive polyurethane catalyst.
    • 用于共同生产两种聚氨酯催化剂的一锅反应方法,其包括在氢化催化剂存在下,在一定时间内使过量的二亚乙基三胺(DETA)与环氧丙烷反应,使基本上完全反应环氧丙烷 得到DETA和N-2-羟丙基二亚乙基三胺(HPDETA)的混合物,向反应容器中加入甲醛和氢气,使DETA和HPDETA与甲醛和氢气在使DETA和HPDETA发生全甲基化的条件下反应,得到N,N ,N',N',N“ - 五甲基二亚乙基三胺(PMDETA),聚氨酯催化剂和N-2-羟丙基-N,N',N',N” - 四甲基二亚乙基三胺(HPTMDETA)。