硝化

Aminobenzothiazoleswere diazotized and then coupled with active methylenecompounds to form a kinds of new hydrazones.

苯基硫脲在浓硫酸中，先在溴作用下氧化合环，再直接硝化，得到产率95％，纯度98％的2-氨基-6-硝基苯并噻唑。

Shandong Zhiqiang Group is a private enterprise, founded in 1994, I unit after more than 10 years of development, set up a refined cotton Limited, Nitrocellulose Limited, distempers Mastics tablets Limited, Yan Milling Co., Ltd., seasoning food Limited, strong Clothing Co., Ltd., Biological Technology Co., Ltd., Tongda Technology Co., Ltd.

山东志强集团是一家民营企业，创立于1994年，我单位经过10余年的发展，成立了精制棉有限公司、硝化棉有限公司、硝基漆片有限公司、天雁制粉有限公司、调味食品有限公司、强盛制衣有限公司、生物科技有限公司、通达工艺地毯有限公司等分公司。

Methods: 2ethyl aniline was used as starting material of the synthesis and was processed by acetic anhydride acylation, strong nitric acid nitraction at low temperature, and desacyl synthesis to produce 2ethyl5nitro aniline. The product was then synthesized to 3methyl6nitro1Hindazole by using ringclosing reaction in the presence of NaNO2, and then ethylated to obtain 2,3diethyl6 nitro2Hindazole. The latter compound was then reduced by SnCl2/Hcl to get target compound 2,3diethyl6nitro2Hindazole.

以2乙基苯胺为原料经醋酐酰化、浓硝酸低温硝化及去酰基保护合成2乙基5硝基苯胺，后用亚硝酸钠关环得3甲基6硝基1H吲唑，经硫酸二甲酯甲基化得2，3二甲基6硝基2H吲唑，最后用氯化亚锡将其还原得到目标产物，通过1H NMR确定结构与目标产物一致。

Methods: 2-ethyl aniline was used as starting material of the synthesis and was processed by acetic anhydride acylation, strong nitric acid nitraction at low temperature, and desacyl synthesis to produce 2-ethyl-5-nitro aniline. The product was then synthesized to 3-methyl-6-nitro-lH-indazole by using ring-closing reaction in the presence of NaNO2, and then ethylated to obtain 2, 3-diethyl-6- nitro-2H-indazole. The latter compound was then reduced by SnC12/Hcl to get target compound 2, 3-diethyl-6-nitro-2H-indazole.

以2-乙基苯胺为原料经醋酐酰化、浓硝酸低温硝化及去酰基保护合成2-乙基－5-硝基苯胺，后用亚硝酸钠关环得3-甲基－6-硝基－1H-吲唑，经硫酸二甲酯甲基化得2，3-二甲基－6-硝基－2H-吲唑，最后用氯化亚锡将其还原得到目标产物，通过1HNMR确定结构与目标产物一致。

Testing of paints, varnishes and similar products; determination of nitro cellulose content of lacquers

涂料的检验。漆中硝化棉含量的测定

Moreover, copper ions were isolated as hydroxides, which is beneficial to the separation of copper from nitrated products.

而且，硝化过程中铜以氢氧化物固体沉淀的形式析出，便于与硝基化产物分离。

The discrimination of five nitrated products was accomplished by molecular symmetry considerations and 1H NMR analysis.

通过对五种硝化产物分子的对称性和1H NMR分析，可方便准确地鉴定各个产物。

The 3,4-dimethoxybenzene was nitrated by mixed acid of HNO3-H2SO4 under the reaction temperature of 0~5℃. 3,4-dimethoxynitroben-zene was obtained by filtration, and its yield reached over 97%.

在0~5℃低温条件下，以硝酸和硫酸按比例配成的混酸进行硝化，反应结束后过滤得到3，4-二甲氧基硝基苯，该步反应的收率有97%。

Ted Elsasser is a scientist at the United States Agricultural Research Service. He is studying possible signs of stress on animals. He says changed proteins called nitrated proteins may serve as an early warning system for the problem.

特德。埃尔萨瑟，他是美国农科所的科学家，他的研究方向就是动物焦虑的征兆，他说，改变了的蛋白质即硝化蛋白对预防该问题有很大帮助。

Organic compounds used as solvents include aromatic compounds and other hydrocarbon s, alcohols, esters, ethers, ketones, amines, and nitrated and halogenated hydrocarbon s.

有机化合物作为溶剂的有芳香族化合物及其它烃类、醇、酯、醚、酮、胺，还有硝化与氯化的烃类。

I can not make it blossom and suits me

我不能让树为我开花

When temperatures are above approximately 80 °C discolouration of the raceways or rolling elements is a frequent feature.

当温度高于 80 °C 左右时，滚道或滚动元件褪色是很常见的特征。