查询词典 basic anhydride

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。

Based on green chemistry,the cleaner production of HPMA(hydrolyzed polymaleic anhydride) has been studied.

以绿色化学为基础，研究了水解聚马来酸酐的绿色合成工艺。

The characteristics of light sulfurized and esterified castor oil ①It's shown by the IR and LC-MSD that the sulfurized castor oil esterified with acid anhydride on 12-hydroxyl forms single, di and tri-esters.

流变性能：使0.5％S、1％S、2％S和3％S轻度硫化蓖麻油的粘度从327增加到545，粘度指数从135减小到100；倾点从-25℃上升到-15℃；碘值从90.6mgI／100g减小到88.5mgI／100g，测定实际的硫含量从0.412％增到2.6％；表明不饱和程度在减小。

Part I, the Friedel-Crafts acylation on DAA and methyl dehydroabietic acid was carried out with acetyl chloride, benzoyl chloride or phthalic anhydride as acylating regents, anh- ydrous aluminum chloride as catalyst and with different solvents to compare with, we have got t- hree new compounds.

第一部分，分别以脱氢松香酸和脱氢松香酸甲酯为底物，乙酰氯、苯甲酰氯、邻苯二甲酸酐为酰化试剂，无水三氯化铝作催化剂，采用不同的溶剂及反应条件进行傅克酰基化反应，得到3个新化合物。

Terpolymer of acrylic acid/acrylic amide/malefic anhydride was synthesized and mixed with polyepoxysuccinic acid in order to improve the scale and corrosion performance of the latter in this study.

为了提高PESA的阻垢缓蚀性能，合成了丙烯酸／丙烯酰胺／马来酸酐三元共聚物，与聚环氧琥珀酸进行物理复配，考察了温度、反应物配比及浓度对复配产品阻垢和缓蚀性能的影响。

The substrate functionality is usually grafted acid anhydride at up to 25 wt%.

基体官能团通常是接枝酸酐，酸酐比率高达25%。

Acid and anhydride functionalized PP, PE and EVA forms are available.

酸或者酸酐功能化 PP 、 PE 和 EVA 等形式都是有的。

First of all, analysis is particular carried out about market environment which is include present situation of market at home and abroad, project investment environment, main product market in acid anhydride industry.

用PEST方法，从政治、经济、社会、技术角度进行了投资项目的宏观环境分析；用波特的五种竞争力模型进行了投资项目行业结构分析；用SWOT分析方法确定了投资项目面临的优势、劣势、机会、威胁。

A new method of rapid measurement on the content of sulfuric acid anhydride in coal ash is described with its test principle, experimental material, procedures and comparative test data of the new and conventional methods.

介绍一种快速，准确地测定煤灰中三氧化硫含量的方法，阐述了该方法的试验原理、实验材料和操作步骤，并提供了新旧方法对比试验的数据。

An acid that is a partial anhydride of three molecules of phosphoric acid; known chiefly in the form of its salts and esters.

三个磷酸分子形成的部分脱水物，已知主要以其盐和酯的形式存在。

There are different types of personal loans available.

有许多不同类型的个人贷款优惠。

The above mentioned teaching model of spiral rising can be used to avoid rigidness in teaching.

上述螺旋式上升的教学模式，可以避免教学形成模式後的僵化现象。