查询词典 resorcinol

Under the optimized parameters,i.e.,resorcinol to potassium carbonate molar ratio of 1∶0.5,reaction temperature of 155℃-160℃,reaction time of 6 hours-7 hours,and dimethyl acetamide as solvent,the yield of 2,6-dihydroxybenzoic acid was up to 29.38%.

溶剂羧化法Kolbe-Schmitt反应，是在有机溶剂氛围中，由酚的成盐和酚盐的羧化两步完成，一直应用在农药、医药以及化肥的合成过程中。

Resorcinol-formaldehyde aerogel is made in a way similar to production of silica aerogel.

间苯二酚甲醛气凝胶是在一种类似生产白炭黑。

Dihydroxybenzoic acid was prepared by carboxylation of resorcinol in solvent under under atmospheric pressure was studied.

研究了间苯二酚常压羧化法制备2，6-二羟基苯甲酸。

Producted RF and CRF aerogels by process of sol-gel technics, dynamic-exchange, CO2 supercritical drying, and procedural increase in temperature carbonization methods, which have eximious capability and nanometer network structure; Systemic analysis various factors which effect gel course, such as ratio of reactants and the dosage of catalyst, and probed into the better experiments conditions(the concentration of resorcinol and formaldehyde is more than 2% and the value of R/C is between 50 and 300); During gel course , primary investigated the viscosity curve and particle size distribution of sol-solution, and analyzed the reason of catalyst dosage effects particle size of gel, and confirmed that the up-growth of gel follows the theory of " polymerize increase ".The experiment results indicated that ultrasonic with unvarying temperature disposal shortened gel time and optimized quality of gels, and the factors of ultrasonic effect gel reaction velocity were analyzed; Prepared organic aerogels using compounds of resorcin and hydroquinone substitute resorcinol reacts with formaldehyde the first time, and also optimized the proportion of resorcinol and hydroquinone (the proportion of hydroquinone in 10%～40%).

采用溶胶-凝胶工艺结合动态溶剂交换、CO2超临界流体干燥与程序升温碳化方法制备出性能优良、具有纳米网络结构的RF与CRF气凝胶；深入研究了反应物配比催化剂用量等条件对凝胶过程的影响，得到了较佳的RF凝胶制备条件(RF浓度应大于2%，R/C值取50～300)；初步研究了凝胶过程中的粘度、粒径变化情况，分析了催化剂用量影响凝胶中粒子尺度的原因，在实验上印证了凝胶生长遵循"聚增长"的理论；通过引入超声波改进了RF气凝胶的制备工艺，缩短了凝胶反应时间，提高了凝胶品质，并探讨了超声波促进RF凝胶反应作用的原因；首次用对苯二酚与间苯二酚复配制备了混合有机气凝胶，优化出复配比(对苯二酚含量为10%～40%)。2。

Based on the β-cyclodextrins' fluorescence enhancement to resorcinol, a new way of fluorescence analysis for resorcinol is presented in this paper.

利用β-环糊精对间苯二酚的包络作用，增敏间苯二酚的荧光强度，提出一种测定环境中间苯二酚的荧光检测新技术。

The sulfonation and oxidation processes for manufacture of resorcinol are compared in environment benefit and some suggestions on the development of resorcinol are proposed.

介绍了间苯二酚的主要用途和国内外生产现状，并对主要的生产方法磺化法和氧化法从环境效应上进行了比较，对今后我国间苯二酚的生产发展提出了建

The linear range for resorcinol is 5.0×10^(-9)~1.0×10^(-4) mol/L with the detection limit of 3.0×10^(-9) mol/L. The relative standard deviation is 3.5% for 1.0×10^(-6) mol/L resorcinol in 11 repeated measurements.

该法测定间苯二酚的线性范围为5.0×10^(-9)~1.0×10^(-4)mol/L，检出限为3.0×10^(-9)mol/L，相对标准偏差为35%（1.0×10^(-6)mol/L间苯二酚，n=11。

The application fields and market situation of resorcinol in the United State, west Europe and Japan were narrated in detail. Meanwhile, the domestic consumption of resorcinol in different fields, its import and export situation were analyzed. And the expansion, newly construction of resorcinol units in China were summarized.

详细概述了美国、西欧和日本间苯二酚的应用领域及市场现状；同时还分析了国内间苯二酚在各领域的消耗和近几年的进出口情况，并对国内扩建以及新建的间苯二酚装置情况进行了全面的总结。

Methods: In dilute H2SO4 medium, resorcinol could sensitively inhabit the gallocyanin solution descolorization reaction with KIO4 and H2O2, the optimal condition was investigated, based on which, an inhibition kinetic spectrophotometric method for the determination of resorcinol was established.

在硫酸介质中，间苯二酚能灵敏地阻抑高碘酸钾和过氧化氢氧化棓花青的褪色指示反应，在探讨了反应的优化条件和动力学参数后，建立了测定微量间苯二酚的阻抑动力学光度分析新方法。

From the results, it was found that sufficient resorcinol was needed for PRTF copolymer resins to have cold-setting property. The PRTF copolymer resins made from Taiwan acacia bark extractives with P/=1/1 had cold-setting capability at the ratio of resorcinol to bark extractives was 25/75, but 50/50 was needed for China fir bark extractives to have cold-setting property.

由试验结果得知，PRTF-B共聚合树脂中仍须有足够的间苯二酚始可具备常温硬化性，以相思树树皮萃取物为原料者，在P/=1/1时，间苯二酚与树皮萃取物之比例为25/75者具常温硬化性，而以杉木树皮萃取物为原料者，则间苯二酚与树皮萃取物之比例则须50/50始具有常温硬化性。

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了