Polyphosphoric acid

Comparation of Nessler Tube Method and Traditional Method for Determination of Polyphosphoric Acid

新型Nessler管粘度法和传统方法测定多聚磷酸浓度的比较

Study found that : ① Adding polyphosphoric acid to reduce the penetration of asphalt , Softening point , viscosity increases , the 5 ℃ ductility than the value of asphalt is slightly lower .

研究发现：①多聚磷酸的掺加使沥青针入度减小，软化点、粘度升高，而5℃延度比基质沥青的延度值稍有降低。

Research on the Synthesis for Alkyl Phosphate by Polyphosphoric Acid

多聚磷酸法烷基磷酸酯的合成研究

The Dynamic Rheological Behavior of Cellulose / Phosphoric Acid / Polyphosphoric Acid Liquid Crystalline Solutions

不同乙酸浓度对聚磷菌厌氧释磷的影响纤维素/磷酸/多聚磷酸液晶溶液的动态流变性能

This paper introduced the method that the thiabendazole was synthesized by polyphosphoric acid as solvent .

介绍多聚磷酸作为4羧酸噻唑与邻苯二胺溶剂兼脱水剂，合成噻苯咪唑&食品保鲜剂的方法。

Properties of asphalts modified with polyphosphoric acid / styrene-butadiene rubber

多聚磷酸与丁苯橡胶复配改性沥青的性能

Preparation of HMX from DPT by using polyphosphoric acid

多磷酸法由DPT制备HMX研究

Application of polyphosphoric acid on acylation of aromatic amines

聚磷酸在芳胺中芳环酰化反应中的应用

PREPARATION OF FRESH PRESERVATION FOR FLOWERS AND FRUIT Development on the Synthesis of Preservative for Food with Polyphosphoric Acid as Solvent

鲜花水果保鲜剂的研制多聚磷酸为助剂合成食品保鲜剂

Adding polyphosphoric acid , the high temperature performance of asphalt mixtures increased , reduce the stability of water , no significant effect on low temperature performance .

多聚磷酸的掺加，使沥青混合料的高温性能提高，水稳定性降低，低温性能无显著影响。

The Dynamic Rheological Behavior of Cellulose / Phosphoric Acid / Polyphosphoric Acid Liquid Crystalline Solutions Rheological research of gelatin and gelatin-PEG spinning solution

纤维素/磷酸/多聚磷酸液晶溶液的动态流变性能明胶溶液及明胶-PEG复合纺丝液流变性研究

Adding polyphosphoric acid , the colloidal structure of asphalt changes , structure of the asphalt from the sol-gel into a sol-gel-type .

多聚磷酸的掺加使沥青胶体结构发生变化，使沥青的胶体结构由原来的溶胶型转变为溶胶一凝胶型。

Compared with the above encapsulated physical coated process , the salification reaction between melamine and polyphosphoric acid before compounding with brucite was investigated .

为与以上微胶囊化物理包覆过程形成对比，我们考察了三聚氰胺先与多聚磷酸化学成盐后再与水镁石复配形成复合阻燃剂的情况。

Polyphosphoric acid to the asphalt mixing is a physical blending process , and with good compatibility with asphalt , even distributed in the asphalt , which has good heat storage stability .

多聚磷酸掺加到沥青中是一个物理共混过程，而且与沥青具有很好的相容性，能均匀的分布于沥青中，从而具有良好热储存稳定性。

Cyclizations of 2 , 6-Disubstituted Acetophenone Phenylhydrazones in the Presence of Polyphosphoric Acid

2,6-二取代苯乙酮苯腙在多聚磷酸（PPA）存在下的成环反应

Considering the low corrosiveness of polyphosphoric acid to the stainless steel , the combustion chamber , which was made of stainless steel without inner lier , was used in the two-step method process .

利用多聚磷酸对不锈钢的低腐蚀特性，在二步法工艺中采用无衬里不锈钢燃磷塔。

Discussion of the effect of reaction time , the concentration of polyphosphoric acid ( PPA ), fatty alcohol ( ROH ) / PPA mole ratio to the ROH conversion and MAP content .

讨论了反应时间、聚合磷酸的浓度、脂肪酸／聚合磷酸的摩尔比等因素对脂肪醇的转化率和单烷基磷酸酯含量的影响。

Poly ( p-phenylene benzobisoxazole )( PBO ) was synthesized by polycondensation reaction of 4,6-diamino-1,3-benzenediol dihydrochloride and terephthalic acid in the presence of polyphosphoric acid .

以4,6-二氨基-1,3-苯二酚盐酸盐和对苯二甲酸为原料，多聚磷酸为介质，缩聚得到聚对苯撑苯并二恶唑（PBO）。

The acetylation of the hydrocarbon fraction of cedar wood oil with acetic anhydride ~ polyphosphoric acid and the prins reaction of d & limonene with acetic anhydride ~ paraformaldehyde have been studied .

本文研究了柏木萜烯与醋酐～多聚磷酸的乙酰化反应和d-芋烯与醋酐～多聚甲醛的Prins反应，经正交试验结果，柏木萜烯乙酰化反应得率为70%。

Our work was carried out as followed : 1 . A series of 2-substituted benzimidazoles were synthesized by the reaction of o-phenylenediamine with corresponding acid in polyphosphoric acid under microwave . 11 Compounds were synthesized in this way first time .

以邻苯二胺及相应的羧酸为原料，微波辐射下，合成了18种2-取代苯并咪唑衍生物，其中11种化合物的微波合成未见文献报道，研究并优化了反应条件。