亚磷酸盐

A process based upon solvent extraction has been developed for the recovery of phosphoric acid from a leaching liquor obtained by decomposition of phosphate rock with sulfuric acid.

本文采用二丁基亚砜作为萃取剂，对于用硫酸分解磷矿而得的粗磷酸进行多级逆流萃取及反萃取，以获得高纯度的磷酸和磷酸盐。

The study manirests that 4,6-diaminoresorcinol diphosphate is stable for oxidization after being placed one month.

以次亚磷酸为还原剂对磷酸盐单体进行稳定化的研究表明：稳定后的磷酸盐在室温条件下储藏一个月后，基本不发生氧化。

Chart3: variation of water nutrition value in aquaculture pools,infall and outfall

图3为无机盐（硝酸氮，亚硝酸氮，氨氮，非离子氨）和磷酸盐含量变化图。

Determination of dissolved fluoride, chloride, nitrite, orthophosphate, bromide, nitrate and sulfate ions, using liquid chromatography of ions.

液态离子色谱法测定溶解的氟化物、氯化物、亚硝酸盐、亚磷酸盐、溴化物、硝酸盐和硫酸离子。

In this thesis, we described the synthesis,crystal structure and some properties of a series of metal phosphite compounds.

在这篇论文中，详细地描述了一系列金属亚磷酸盐的合成、结构特点以及一些化学性质。

More than 10 varieties: the phosphate series; phosphite and organic phosphorus products; and type catalyst and pharmaceutical intermediates.

十多个品种：即磷酸盐系列；亚磷酸和有机磷类产品；和类催化剂及医药中间体。

More than 10 varieties: the phosphate series; phosphite and organic phosphorus products; and the type of catalyst and pharmaceutical intermediates.

十多个品种：即磷酸盐系列；亚磷酸和有机磷类产品；和类催化剂及医药中间体。

To investigate the pitting and metastable pitting rules of type 304 stainless steel, potentiodynamic polarization method was employed to study the behavior of metastable pitting and stable pitting on 304 stainless steel in sodium bromide solution and borate/phosphate buffered bromide solutions. The influence of the concentration of Br-、the pH value、the buffer capacity and general environmental factor to pitting potential and metastable pitting was studied as well.

为了更深入地了解304不锈钢的稳态及亚稳态孔蚀规律，本文采用动电位慢扫描法测得了304不锈钢的阳极极化曲线，研究了不锈钢在纯溴化钠溶液及含溴化钠的硼酸盐或磷酸盐缓冲溶液中的亚稳态孔蚀以及稳态孔蚀行为，分析了溴离子浓度、pH值、缓蚀性阴离子、以及缓冲容量和综合环境因子对孔蚀电位以及亚稳态孔蚀特征参数中的形核数目、峰值电流、生长寿命的影响。

The polymeric sol is obtained by process of preparing a calcium salt solution, containing calcium ethoxide dissolved in organic acid, and a phosphate solution, containing triethyl phosphite or triethyl phosphate dissolved in the organic acid, mixing the calcium salt solution with the phosphate solution to produce a mixed solution, and aging the mixed solution.

本发明的磷酸钙化合物的聚合物溶胶是通过如下步骤制备的：制备含有溶解在有机酸中的乙醇钙的钙盐溶液和含有溶解在该有机酸中的亚磷酸三乙酯或磷酸三乙酯的磷酸盐溶液；及将该钙盐溶液和该磷酸盐溶液混和制得混合溶液，并老化该混合溶液。

In addition to cationic gold complexes bearing bulky biphenyl phosphines, a gold complex with tris(2,6-di-tert-butylphenyl)phosphite is exceptionally reactive as a catalyst for this reaction.

在与有大体积连苯基膦配体的金正配合离子加成反应中，三(2，6－二叔丁基苯)亚磷酸盐的金配合物异常活泼并充当该反应的催化剂

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。