phosphorus pentoxide

Rapid Determination of Phosphorus Pentoxide in Extraction Paste by Acid-Base Titration

酸碱滴定法快速测定萃取料浆中五氧化二磷含量

Phosphorylation of high fatty alcohol with phosphorus pentoxide was studied with the aid of 31 P NMR spectrum .

采用31pNMR波谱对高碳脂肪醇与五氧化二磷的反应进行了研究，定量地表征了产物混合物中的各组分。

Determination of Phosphorus Pentoxide Content in Carbonate Rocks by Spectrophotometry

分光光度法测定碳酸盐岩石中五氧化二磷的含量

Methods for chemical analysis of aluminium oxide & The molybdenum blue photometric method for the determination of phosphorus pentoxide content

GB/T6609.17-1986氧化铝化学分析方法钼蓝光度法测定五氧化二磷量

Determination of Phosphorus Pentoxide in Phosphate Ore by Bismuth Salt - molybdenum Blue Parallax Photometric Method

铋盐-钼蓝示差光度法测定磷矿石中五氧化二磷

The structure and the acidic properties of H β zeolite were modified with phosphorus pentoxide added by using chemical vapour deposition method .

采用化学气相沉积法，研究了五氧化二磷对Hβ分子筛酸性和孔结构的改性。

The method is suited to determine the phosphorus pentoxide contents with the range of 5 % ~ 38 % in phosphate ores .

适用于磷矿石中5%～38%五氧化二磷的测定。

Beckmann rearrangement of cyclohexanone oxime into caprolactam catalyzed with phosphorus pentoxide

P2O5液相催化环己酮肟重排制己内酰胺

Note . ( 1 ) The dichloromethane is distilled from phosphorus pentoxide and stored over molecular sieves .

注意事项（1）二氯甲烷加入五氧化二磷蒸馏，加入分子筛储存。

Phosphorus-doped phenolic resin carbon was prepared by low temperature ( 700 ℃) pyrolysis of thermoplastic phenolic resin containing different amounts of phosphorus pentoxide after curing .

以添加不同含量五氧化二磷的热塑性酚醛树脂为前驱体，经热固化后升温至700℃裂解制备掺磷树脂裂解炭。

Aliphatic alcohol polyethenoxy phosphate is synthesized based on aliphatic alcohol polyethenoxy ether ( AEO 3 ) and phosphorus pentoxide .

以脂肪醇聚氧乙烯醚（AEO3）为原料，以P2O5为磷酸化试剂，合成了脂肪醇聚氧乙烯醚磷酸酯。

A series of new type phosphate amphoteric surfactants were synthesized by using ethylene glycol , epichlorohydrin , alkyl tertiary amine and phosphorus pentoxide as raw materials .

以乙二醇、环氧氯丙烷、烷基叔胺和五氧化二磷为原料，合成了一种磷酸酯两性表面活性剂。

Preparation p-n junction by phosphorus pentoxide sublimation , the most influence on square resistance is reaction time followed by flow and silicon reaction temperature , the least is phosphorus oxychloride diffusion .

五氧化二磷升华制备p-n结，对方块电阻影响最大的是反应时间，其次是气流量和硅片反应温度，P2O5升华温度影响较小。

Include the following parts : 1 . The hydroxyapatite with nano-crystalline structure was prepared by sol-gel method with mild conditions as the calcium nitrate tetrahydrate and phosphorus pentoxide used for raw materials .

主要包括以下几个内容：1.以四水硝酸钙和五氧化二磷为原料，采用实验条件比较温和的溶胶凝胶法制备具有一定结晶结构的纳米羟基磷灰石。

Tests proved that : arsenic is separated differently by putting different quantity sodium sulfide liquid and different static settlement time after stirring evenly , and it is not affecting defluorination , not reducing phosphorus pentoxide content .

试验证实，在萃取液中加入不同量的硫化钠溶液，搅拌均匀后静置不同的时间，能达到不同的除砷率，而且不会影响脱氟，不会增加磷损。

A new process is studied for the synthesis of alcohol ethoxylate phosphate prepared by esterifying alcohol ethoxylate ( AEO 3 ) with phosphorus pentoxide in the presence of water and hydrolyzing with steam .

建立了在水存在下的脂肪醇聚氧乙烯醚（AEO3）与五氧化二磷酯化再用水蒸汽进行水解合成高单酯含量磷酸酯的生产工艺。

Results : The linear range of phosphorus pentoxide in air of workplace was 0.0 ~ 4.0 μ g / ml with its correlation coefficent 0.9997.The detecting lower limit of the method was 0.5 μ g / ml.

结果：工作场所空气中五氧化二磷的线性范围为0~4.0μg/ml；相关系数为0.9997；

In the uniformity comparison of preparation p-n junction by phosphorus oxychloride diffusion and by phosphorus pentoxide sublimation , it is more uniformity that p-n junction preparation by phosphorus pentoxide sublimation .

三氯氧磷扩散与五氧化二磷升华制备p-n结的均匀性比较中，用五氧化二磷升华制备出的p-n结要更加均匀。