查询词典 phosphorous acid

Owing to phosphorous acid is produced from phosphorus trichloride in industry by hydrolysts, inspissation and crystallization, if we use phosphorus trichloride directly on synthesize N- iminodiacetic acid, not only can simplify operation, but also can reduce the cost and save energy.

草甘膦是一种高效、广谱的灭生性除草剂，尽管已问世30多年，但由于其卓越的除草性能和不断扩展的应用领域，使其在世界农药市场上和研究领域一直独领风骚，迄今为止已报道了十余种不同合成路线和上百种不同的工艺方法。

Owing to phosphorous acid is produced from phosphorus trichloride in industry by hydrolysts, inspissation and crystallization, if we use phosphorus trichloride directly on synthesize N- iminodiacetic acid, not only can simplify operation, but also can red.

原工艺采用的是在酸性条件下高温时将甲醛滴加到亚磷酸与亚氨基二乙酸一钠盐混合溶液中进行反应，考虑到工业上亚磷酸的合成一般采用三氯化磷水解、提浓、结晶制得，直接将三氯化磷用于双甘膦的合成，不仅可以简化操作过程，而且对于降低生产成本和能耗有明显意义。

Originally techniques dropped formaldehyde into the mixture of phosphorous acid and monosodium of imino diacetic acid in high temperature. Owing to phosphorous acid is produced from phosphorus trichloride in industry by hydrolysis, inspissation and crystallization, if we use phosphoros trichloride directly on synthesize N- iminodiacetic acid, not only can simplify operation, but also can reduce the cost and save energy.

原工艺采用的是在酸性条件下高温时将甲醛滴加到亚磷酸与亚氨基二乙酸一钠盐混合溶液中进行反应，考虑到工业上亚磷酸的合成一般采用三氯化磷水解、提浓、结晶制得，直接将三氯化磷用于双甘膦的合成，不仅可以简化操作过程，而且对于降低生产成本和能耗有明显意义。

N-formyl morpholine was synthesized using morpholine and formic acid as starting materials,phosphorous acid as catalyst and cyclohexane as water carrying agent.

以吗啉和甲酸为原料，磷酸为催化剂，环己烷为带水剂合成了N-甲酰吗啉。

N-formylmorpholine was synthesized using morpholine and formic acid as starting materials,phosphorous acid as catalyst and cyclohexane as water carrying agent.

马西功，于世涛，季开慧，刘福胜，N-甲酰吗啉的合成以吗啉和甲酸为原料，磷酸为催化剂，环己烷为带水剂合成了N-甲酰吗啉。

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。

In acidic medium,ammonium vanadate and ammonium molybdate are added,which,with phosphorous acid,form yellow ternary acid of phosphor,vanadium and molybdenum,by which the content of phosphor can be determined.

试样经盐硝混合酸溶解，以过氧化氢将亚磷酸氧化成正磷酸，在酸性介质中，加入钒酸铵和钼酸铵与磷酸形成黄色的磷钒钼三元杂多酸，从而进行磷的测定。

The phosphorous acid industry in China is now facing the problems of shortage of energy sources and run-up of power price,and the market competition ability of phosphorous chemicals which use phosphorous acid from furnace process as the material is going down gradually.

我国磷酸工业生产面临能源短缺，电价攀升等问题，以热法磷酸为原料的磷化工产品的市场竞争能力逐渐降低。

Strong corrosion fluid sulfuric acid, nitric acid, phosphorous acid, hydrochloric acid, caustic sodium and organic solvent, etc.

强腐蚀性流体(硫酸、硝酸、磷酸、盐酸类、苛性钠及有机溶剂等)。

The phosphorous acid industry in China is now facing the problems of shortage of energy sources and run-up of power price,and the market competition ability of phosphorous chemicals which use phosphorous acid from furnace process as the material is going down gradually.

采用正交实验，研究了高倍半氧化物含量的中低品位磷矿在磷酸与硝酸混酸中的酸解行为，并确定了实验室最佳工艺条件：反应温度65℃，液固比14∶1，磷酸浓度(P2O5)20%，硝酸浓度9.50g/L，添加物KDD浓度5.50g/L，反应时1h。

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。