查询词典 formic acid

Methods 4-Hydroxy- benzonitrile was treated with sodium hydrogen sulfide and anhydrous magnesium chloride in dimethyl formamide to give thioamide, which was then directly cyclized with ethyl 2-chloroacetoacetate without separation to give ethyl 2-(4-hydroxyphenyl)-4-methylthiazole-5-carboxylate(2) in one-pot; then 2 was formylated with Duff reaction adopting hexamethylenetetramine in trifluoroacetic acid to give ethyl 2-(3-formyl-4-hydroxyphenyl)-4-methylthiazole-5-carboxylate(3); finally, the target compound was obtained by the treatment of 3 with hydroxylamine hydrochloride and sodium formate in formic acid.

采用"一勺烩"方法，以4-羟基苯甲腈为起始原料，首先与硫氢化钠和无水氯化镁在N，N-二甲基甲酰胺中反应，所得中间体不经分离，直接加入2-氯乙酰乙酸乙酯进行环合反应，得到2-(4-羟基)苯基-4-甲基-5-噻唑甲酸乙酯（2）；然后通过六亚甲基四胺/三氟乙酸进行Duff反应，得到2-(3-甲酰基-4-羟基)苯基-4-甲基-5-噻唑甲酸乙酯（3）；再经盐酸羟胺/甲酸/甲酸钠体系脱水得到目标化合物。

The paper introduces method and step of determination formic acid and acetic acid in exhaust gas by ion chromatography.

阐述了离子色谱法测定废气中甲酸、乙酸含量的方法和步聚。

N-formyl morpholine was synthesized using morpholine and formic acid as starting materials,phosphorous acid as catalyst and cyclohexane as water carrying agent.

以吗啉和甲酸为原料，磷酸为催化剂，环己烷为带水剂合成了N-甲酰吗啉。

N-formylmorpholine was synthesized using morpholine and formic acid as starting materials,phosphorous acid as catalyst and cyclohexane as water carrying agent.

马西功，于世涛，季开慧，刘福胜，N-甲酰吗啉的合成以吗啉和甲酸为原料，磷酸为催化剂，环己烷为带水剂合成了N-甲酰吗啉。

Are the main products are: yellow phosphorus, phosphoric acid, sodium salt (one, two, three, four, five, six sodium), formic acid, sodium, a potassium, dispersants, S Lida triazine and more than 300 chemical reagent Products.

现主要产品有：黄磷、磷酸、磷酸钠盐（一、二、三、四、五、六钠）、甲酸、甲酸钠、甲酸钾、分散剂、硫利达嗪和300多个化学试剂产品。

The azeotropism -fractionation process for recovering formic acid from acid wastewater in cyclohexanol/ cyclohexanone production was studied,and the feasible kind and dosage of entrainment reagent for was determined.

采用共沸—分馏组合法从环己醇和环己酮生产装置产生的酸性废水中回收甲酸，确定了适宜挟带剂的种类及加入量。

Benzothiophene was selected as model sulfide and dissolved in n-octane to form model diesel, hydrogen peroxide/formic acid/sulfuric acid were used as the oxidative system.

在苯并噻吩／正辛烷配成的模拟柴油中，以过氧化氢／甲酸／硫酸作氧化脱硫体系，考察了硫酸的催化性能以及反应条件对氧化脱硫率的影响。

The main products are formic acid, propionic acid, methyl acetate, morpholine, imidazole, methyl chloroformate, 1,2-pentanediol, nylon and engineering plastic.

代理BASF和HONEYWELL优质产品散水化工品：甲酸，丙酸，醋酸甲酯中间体：吗啉，咪唑，氯甲酸甲酯，1，2－戊二醇，尼龙和工程塑料。

Test solution of pyrogallic acid was prepared by adding formic acid as antionxidative stabilizer, thus the measuring instability due to the oxidability of pyrogallic acid was overcome.

通过加入甲酸作为焦性没食子酸试液的抗氧化保护剂，解决了由于试样的氧化而导致测定值不稳定的问题。

Test solution of pyrogallic acid was prepared by adding formic acid as antionxidative stabilizer, thus the measuring instability due to the oxidability of pyrogallic acid was overcome.

研究了用紫外分光光度法测定焦性没食子酸含量的一种新方法。

Singer Leona Lewis and former Led Zeppelin guitarist Jimmy Page emerged as the bus transformed into a grass-covered carnival float, and the pair combined for a rendition of "Whole Lotta Love".

歌手leona刘易斯和前率领的飞艇的吉他手吉米页出现巴士转化为基层所涵盖的嘉年华花车，和一双合并为一移交&整个lotta爱&。

This is Kate, and that's Erin.

这是凯特，那个是爱朗。