查询词典 phosphorus oxychloride

With sodium acetate as catalyst, inosine was esterified with acetic anhydride in the yield of 92% to give 2',3',5'-triacetyl inosine, which was treated with pyridine and phosphorus oxychloride to form a pyridinium solution, followed by performing an amination at 40℃ and 0.25~0.30 MPa to achieve adenosine in the yield of 67%.

肌苷在醋酸钠存在下与醋酸酐发生酯化反应以92%的收率得到2'，3'，5'-三乙酰肌苷，其化合物经吡啶和三氯氧磷处理形成吡啶盐溶液，未分离直接在40℃、0.25~0.30 MPa压力下进行氨解反应以67%产率制得腺苷。

The dehydration of sulphonyl derivatives of N-alkylformamide using phosphorus oxychloride in the presence of triethylamine at 0-10℃ provides a useful method for the preparation on sulphonylmethyl isocyanides e.g.

光气同三乙胺或是嘧啶是一组有效的制取异氰基化合物的试剂，但是，由于光气在安全性方面的问题它不适宜在大规模上制取异氰基化合物。

Two types of P Br N contained flame retardant,O (2,4,6 1 trioxo 1 oxyphosphabiscyclooctane 4 methylene) O (2,3 dibromopropyl)phosphoric melamine salt and O (2,4,6 tribromophenyl)phosphoric melamine salt,were synthesized from phosphorus oxychloride,pentaerythritol,2,3 dibromopropanol,2,4,6 tribromophenol and melamine,etc.

以三氯氧磷、季戊四醇、2 ，3 二溴丙醇、2 ，4，6 三溴苯酚及三聚氰胺等为原料合成了两种含磷溴氮阻燃剂，即O (2 ，4，6 三氧杂 1 氧基磷杂双环 [2 。2 。2 ]辛烷 4 亚甲基) O 2 ，3磷酸三聚氰胺盐和O (2 ，4，6 三溴苯基)磷酸三聚氰胺盐。

The compound 3, 9-bis (2＇, 4＇, 6＇-tribromophoxy)-2, 4, 8, 10-traoxa -3, 9-dip- hosphospiro [5.5] undecane -3, 9-dioxide (HFR-1) was prepared with pentaeryth- ritol, phosphorus oxychloride and 2, 4, 6-tribromophenoxy soldium by esterifica- tion and condensation reaction.

以三溴苯酚钠、三氯氧磷、季戊四醇为原料，通过酯化和缩合两步反应合成了阻燃剂3，9-双(2'，4'，6'三溴苯氧基)-2，4，8，10-四氧代-3，9-二磷螺环-3，9-二氧[5.5]十一烷。

Objective:Triisopropylated phenyl phosphate ester was synthesized from isopropylphenol and phosphorus oxychloride.

目的 用三异丙基苯酚和三氯氧磷为原料合成三异丙苯基磷酸酯。

Keywords Phosphorus oxychloride;The air of workplace;Ion chromatography

三氯氧磷；工作场所空气；离子色谱法

With phosphorus oxychloride the high cross-linking corn starches were prepared. The noncrystallization of the starches with the increase of the degree of substitution was reported.

研究了以三氯氧磷为交联剂的高交联玉米淀粉的制备方法，报道了高交联玉米淀粉颗粒随反应取代度增加而逐渐非晶化的现象。

Results:The linear range of phosphorus oxychloride in air of workplace was 0.0~5.0 μg/ml with its correlation coefficient...

结果：工作场所空气中三氯氧磷的线性范围为0~5.0μg/ml；相关系数为0.9993；方法检出限0.030μg/ml，若采集10 L空气进行检测，则最低检出浓度为0.03 mg/m3，相对标准偏差为0.35%~1.59%，样品加标回收率为96.9%~103.2%，样品在室温下至少可保存1周。

Starch ; phosphorus oxychloride ; degree of cross-linking

淀粉；三氯氧磷；交联度

Another innovation in this thesis is that another cheap and safecomplexant—sodium chloride has been found, but pyridine, phosphorus oxychloride,and phosphoric anhydride etc mentioned in documents were given up.

本文另一创新点在于为反应找到了一种廉价安全的络合剂—氯化钠，摒弃了文献中常用的吡啶、三氯氧磷、五氧化二磷等络合剂。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。