查询词典 hexamethylenetetramine

In order to expand the utilization fields of wood and decrease the costs of carbon fiber,carbon fiber precursor from liquefied wood was prepared by soaking liquefied wood in the solution of hydrochloric acid and formaldehyde,after melt-spinning by adding hexamethylenetetramine.

为了扩大木材的应用领域和降低碳纤维的成本，以木材液化物为原料，加入六次甲基四胺熔融纺丝，经甲醛和盐酸溶液固化处理后获得木材液化物碳纤维原丝，利用IR、XRD、拉曼光谱分析仪等初步揭示了木材液化物碳纤维原丝在炭化过程中微结构的变化。

The optimum reaction conditions are obtained by orthogonal exptl. design; ring-opening reaction:n:n = 1:1.3, Hexamethylenetetramine catalyst 0.7%,reaction temp. is 80℃, reaction time is 7 h, and concentration of inhibitor is 0.3%. ring-closing reaction : n:n=1:0.9, reaction temp. is 40℃, reaction time is 5 h.

通过正交设计确定了最佳工艺条件为：开环反应：六次甲基四胺用量0.7%(占反应物总量的质量百分比)，阻聚剂用量0.3%(占反应物总量的质量百分比)，ECH：MAA的摩尔比为1.3：1，温度80℃，反应时间7h ；闭环反应：氯醇酯： NaOH的摩尔比为1：0.9，反应温度40℃，反应时间5h。

In the crystal structure of the title compound,the independent p-hydroxybenzoic acid and hexamethylenetetramine molecules are arranged alternately and constructed the three-dimensional hydrogen-b.

在标题化合物的晶体结构中独立的对羟基苯甲酸分子和六次甲基四胺分子组交错排列，借助多种氢键形式形成三维氢键网络结构，其中弱氢键扮演着重要的角色

Organization: Department of Mechanical Engineering, Qingdao Technological UniversityAbstract: In this paper, based on the tailoring and controlling of hydrofluoric acid, ZnO flower-like sphere micronanostructures were grown in an aqueous solution of zinc nitrate and hexamethylenetetramine.

摘 要：采用六水硝酸锌［Zn(NO3)2·6H2O］和六次甲基四胺(C6H12N4)作反应剂，基于氢氟酸的调控作用，利用低温液相技术制备了ZnO花-球微纳米结构。

The carbon fiber precursors were prepared from liquefied wood in phenol by adding hexamethylenetetramine and soaking in the solution containing hydrochloric acid and formaldehyde as the main components.

以木材苯酚液化物为原料，加入六次甲基四胺熔融纺丝后，经甲醛和盐酸溶液固化处理、炭化后得到木材液化物碳纤维。

Methods 4-Hydroxybenzonitrile (2) as the starting material was transformed to 4-hydroxy-thiobenzamide (3) via thioformylation. And ethyl 2-(4-hydroxyphenyl)-4-methylthiazole-5-carboxylate (4), which was synthesized via cyclization from 3, was treated with hexamethylenetetramine to generate the intermediate ethyl 2-(3-formyl-4-hydroxyphenyl)-4-methylthiazole-5-carboxylate (5). The target compound febuxostat (1) was obtained from 5 by etherification, cyanidation, hydrolysis.

以羟基苯腈为原料，经硫代甲酰化得到对羟基硫代苯甲酰胺(3)，3经环合得到2-（4-羟基苯基）－4-甲基－噻唑－5-羧酸乙酯(4)，4与乌洛托品反应，得到中间体2-（3-甲酰基－4-羟基苯基）－4-甲基－噻唑－5-羧酸乙酯(5)，之后再经醚化、氰化、水解得到目标产物(1)。

Our company Products: Plastic Products:(plastics, nylon, polyester, nylon, vinylon and cotton as raw materials, etc.) lines, rope, belt Chemical Products: hexamethylenetetramine, morpholine, starch, protein powder, glucose, citric acid, etc.

敝司产品：塑料产品：（塑料、尼龙、涤纶、锦纶、维纶及棉等为原料的）线、绳、带化工产品：六次甲基四胺、吗啉、淀粉、蛋白粉、葡萄糖、柠檬酸等

Synthesis and Crystal Structure of One Novel Three-dimensional Supramolecular Compound [Ni(H_2O)_6] ·2·4H_2Ofum= fumarate ; hmt=hexamethylenetetramine

一种新的三维超分子化合物[Ni(H_2O)_6·]2·4H_2O的合成和晶体结构(fum=反丁烯二酸根；hmt=六次甲基四胺)英文

In order to reduce the corrosion of acidic paint stripper to aeronautical metals and provide with better anti-corrosion additive for AIL4130, TC4, LY12, and 20(superscript #) steel, a series of inhibitors and their composite were investigated. Weight loss experiment, Tafel curves measurement and SEM observation were carried out for the above metals in the formic acid solution which was normally used in the paint stripper. The experimental results indicate that the optimizing composite inhibitor consists of sodium benzoate, 2-thiourea, hexamethylenetetramine, sodium laurylsulfonate and 1, 2, 3-benzotriazole.

为降低酸性脱漆剂对飞机金属材料的腐蚀，以脱漆剂中经常使用的甲酸水溶液为研究介质，以AIL4130、TC4、LY12、20钢等材料为研究对象，通过腐蚀失重法、塔菲尔曲线测量和SEM观察，筛选出对以上各金属材料缓蚀效果较好的复配缓蚀剂体系，即苯甲酸钠、硫脲、六次甲基四胺、十二烷基磺酸钠、苯并三氮唑等缓蚀剂的优化组合。

Using inorganic aluminous salts as precursors and hexamethylenetetramine as the catalyst, alumina nanonpowder was fabricated by sol-gel procedure and then incorporated in the preparation of body batch for thickly-glazed, thin-bodied celadon wares.

以无机铝盐为先驱体，六次甲基四胺为催化剂，采用溶胶－凝胶法制备了纳米氧化铝粉体，将纳米氧化铝粉体应用于薄胎厚釉青瓷瓷胎中，研究了粉体对青瓷瓷胎的增强作用。

Now, however, all children continue in "comprehensive" schools, and the eleven-plus determines which courses of study the child will follow.

然而现在，所有的孩子都要在综合学校继续学习，所以这次考试只是决定他们将要学习哪些课程。

Cultivatable land , and led to a general recognition that development must not be carried at the cost of agriculture .

城区的迅速扩大在很多情况下侵占了宝贵的可耕地，使人们普遍认识到发展不能以牺牲农业为代价。