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Amino-6-nitrobenzodifuroxan was prepared through a three-step reaction from starting material 3, 5-dinitrobenzoic acid:(1)3, 5-dinitroaniline (1) was synthesized from the reaction of DNBA and hydrazoic acid in inert solvent 1, 2-dichioroethane through Schmidt rearrangement with yield of 89.6%;(2) 1 was subjected to nitration to prepare pentanitroaniline (2) with yield of 51.1%;(3) The title compound was prepared from 2 and sodium azide in acetic acid through denitrogenation and then Schmidt rearrangement with yield of 86.8%, m.p.204℃~206℃.

以3,5-二硝基苯甲酸为原料经过3步反应合成了7-氨基6-硝基苯并二氧化吠咱:第1步反应,在二氯乙烷惰性溶剂中,DNBA与叠氮酸反应并发生Schmidt重排反应生成3,5-二硝基苯胺(1),产率89.6%;第2步反应,1在含100%硫酸的硝硫混酸中硝化生成五硝基苯胺(2),产率51.1%;第3步反应,2与叠氮酸反应,不经分离直接进行热解脱氮、Schmidt重排反应,得到目标化合物, m.p.204℃~ 206℃,产率86.8%。

The research that this research runs parameter design of structure of material of sort of vaccinal to reactor mud , electrode , reactor and each to turned over the influence of nitrify function to undertake many sided to its and discuss .

本研究对反应器接种污泥种类,电极材料,反应器结构设计及各项运行参数对其反硝化性能的影响进行了多方面的研究和探讨。

Amino 5 nitrophenol was synthesized using o aminophenol and urea as raw materials through cyclocondensation ,nitration and alkaline hydrolysis in turn.

以邻氨基苯酚和尿素为原料,对环合、硝化、碱性水解的传统工艺进行改进,合成了 2 氨基 5 硝基苯酚。

An ammonia-oxidizing bacterial strain A5 was isolated from the activated sludge of A/O process,and identified as Nitrosomonas sp.

从厌氧好氧工艺的废水处理系统活性污泥中分离出亚硝化细菌A5 ,鉴定为亚硝化单胞菌 Nitrosomonassp。

NITROSTARCH, WETTED with notless than 20% water, by mass

硝化淀粉,湿的,按重量含水不低于

This process put the anaerobic tank and secondary settlings and the recirculation of nitrified wastewater and the recirculation of sludge and Orbal oxidation ditch inyto together at the basement of Orbal oxidation ditch and the secondary settlings which the inlet and outlet were both circumjacent. This process had many advantages such as the small taking-up area and lower investment and consuming of energy and strong adaptability to raw influent.

介绍了一种新型一体化Orbal氧化沟,该池以Orbal氧化沟和周进周出辐流二沉池为基础,将厌氧池、二沉池、硝化液回流、污泥回流系统与Orbal氧化沟组合为一体,具有占地面积小、投资省、能耗低、原水适应能力强、运行管理更方便的突出优点。

The sludge of autotrophic denitrifying process is flocculent、 dispersal、irregularity-shape, existing a number of sphaerotilus.

9自养反亚硝化系统污泥呈絮状、絮体分散、形状不规则,存在一定数量的丝状菌。

With water-alcohol as solvent, 1-amino-2-naphthol-4-sulfonic acid was prepared from β-naphthol by nitrosotion, addition, and sulphonation.

摘 要:以β萘酚为原料,在水醇混合溶剂存在下,经亚硝化、加成、磺化制得 1 氨基 2 萘酚 4 磺酸,考察了原料配比、混合溶剂配比、反应时间、反应温度及过滤等因素对反应的影响,确定了优惠工艺条件。

The results showed that granular urea amended with dicyandiamide and N- thiophosphoric triamide induced the highest soil nitrate-reductase activity, granular urea brought about the highest soil urease activity and microbial biomass C a...

结果表明,施用硝化抑制剂和脲酶抑制剂涂层大颗粒尿素肥料的土壤硝酸还原酶活性最高;施用大颗粒尿素,脲酶活性最强,微生物量碳、氮最高。

Results The mixing, loading and storing processes of the construction, might generate lots of occupational hazards, including toluene, dimethylbenzene, trimethylbenzene, isopropanol, butyl alcohol, propanol, methyl methacrylate, butyl acetate, methyl isobutyl ketone, methyl ethyl ketone, acetic ether, nitro-cotton, n-hexane, n-heptane, carbinol, ethanol, ethyl propionate, diisobutyl ketone, glycol ether, isoamyl acetate, 2,4-toluene diisocyanate, isophorone, noise, power frequency electric fields.

结果 该项目在混兑生产和装卸、仓储过程中,可能产生的职业病危害因素主要有甲苯、二甲苯、三甲苯、异丙醇、丁醇、丙醇、甲基丙烯酸甲酯、乙酸丁酯、甲基异丁基甲酮、丁酮、乙酸乙酯、硝化棉、正己烷、正庚烷、甲醇、乙醇、乙酸丙酯、二异丁基甲酮、乙二醇乙醚、乙酸异戊酯、2,4甲苯二异氰酸酯、异佛尔酮、噪声、工频电场。

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