亚磷酸

Mesitylene and phosphorous acid were the better solvent and catalyst,respectively.

筛选得到了用均三甲苯为溶剂和用亚磷酸为催化剂，并通过合成及精制试验得到了适宜的制备2，4′ BPS的制备条件，2，4′ BPS的总收率达18 4%，纯度大于95%。

The synthesis path of 2-phosphono-butane-1,2,4-tricarboxylic acid is studied by using alkyl phosphate,butendioic acid dialklesters and methyl acrylate with the catalyst of sodium methylate.

论文摘要本文以亚磷酸二甲酯，顺丁烯二酸二甲酯，丙烯酸甲酯为原料，甲醇钠为催化剂，合成了 2-膦酸丁烷-1，2，4-三羧酸并对中间物及产物进行了 IR、13C，31P 核磁，MS 表征。

The difference of ammonia, amido, amino group and quaternary ammonium salt, some common wrong expressions on them, and the valence state of phosphorus in some of its oxyacid were pointed out.

指出了氨、氨基、胺基及季铵盐的区别及其常见错误表述，以及磷的几种含氧酸中磷的价态，并着重指出没有"次亚磷酸"的叫法。

Main products are special acid, pentyl chloride, methyl chloride acid special, special acid methyl iodine, phosphorous acid, hydrochloric acid, dilute sulfuric acid, industrial naphthalene, coal tar, fuel oil, wash oil, naphtha, Anthracene oil.

主要产品为特戊酸、特戊酰氯、特戊酸氯甲酯、特戊酸碘甲酯、亚磷酸、盐酸、稀硫酸，工业萘、煤焦油、燃料油、洗油、轻油、蒽油等。

The typical process for the synthesis of Dimethyl Phosphite is the continuous process starting from methanol and trichloro phosphine.

亚磷酸二甲酯的合成工艺主要为以甲醇、三氯化磷为原料的无溶剂的连续化生产工艺。

With the rising demand for dimethyl phosphite, more attention was paid to its production process.

随着市场需求的增大，人们对亚磷酸二甲酯的生产工艺越来越关注。

The company has become the export phosphite products manufacturer.

公司现已成为出口亚磷酸产品的主要生产厂家。

The common phosphite antioxidants were introduced, and the application fields of them were pointed out.

列举了具有代表性的亚磷酸酯类抗氧剂，并介绍了其应用领域。

It discussed the characteristics and mechanism of phosphite antioxidant.

叙述了亚磷酸酯类抗氧剂的特征、作用机理。

Dimethyl phosphite is an important chemical intermediate, which has widespread availability in chemical industry.

亚磷酸二甲酯是一种重要的化工中间体，有着广泛的应用。

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。