查询词典 hydrochloric acid

STUDY ON THE EQUILIBRIUM AND COORDINATION COMPOUND OF IRONEXTRACTION WITH N,N-DI (1-METHYLHEPTYL)ACETAMIDE IN HYDROCHLORIC ACID

N，N-二(1-甲基庚基)乙酰胺在盐酸介质中对铁的萃取平衡及其配合物的研究-中国学术期刊网络出版总库

The resulting solution was cooled on an ice bath and 130 ml of concentrated hydrochloric acid was added drop wise.

将得到的溶液在冰水中冷却，并将130毫升浓硫酸逐滴滴入。

Dicalcium phosphate was formed by acidulation of phosphate rock with hydrochloric acid, and mixed with ammonium sulfate to obtain NP fertilizer product by decomposing reaction, the product is almost water soluble one.

按生成CaHPO4化学计量加入盐酸，反应完成后，加入硫酸铵进一步转化CaHPO4和CaCl2得到无水氮磷肥，该肥料中的磷几乎全部以水溶性P2O5存在。氮磷肥可作为基肥生产三元复混肥。

Reacted with metal oxide and alkali, hydrochloric acid can generate salt and water.

与金属氧化物、碱反应生成盐和水。

As one of principal raw materials, hydrochloric acid is consumed for production of poly aluminum chloride.

介绍聚合氯化铝的用途，性能，产品指标；用盐酸与铝酸钙粉生产聚合氯化铝的工艺技术，消耗及投资情况。

The products use pure materials (aluminum hydroxide, hydrochloric acid) are made with advanced technology.

聚合氯化铝是一种新型高效的无机高分子混凝剂，本产品选用纯净原料以先进工艺制成。

Crack and rupture There were 13 tank cracks, 2 body ruptures one roof hole and one flange crack resulting in 13 spillages including oils, hydrochloric acid, sulfuric acid, molten sulfur, and sodium cyanide solution, 3 fires and explosions, and the falling of one operator.

裂缝和破裂那里是13 坦克镇压、2 身体破裂一个屋顶孔和一个耳轮缘裂缝造成13 spillages 包括油，盐酸、硫酸、溶解的硫磺、和钠氰化物解答、3 火和爆炸，和下落一名操作员。

The correlations of the concentrations of Al in tea leaves with sorbed inorganic Al, Al oxide dissolved by hydrochloric acid and Al chelated by humic acid were all not significant, this indicated that the three forms of Al in soil were too stable to be assimlated by tea leaves.

通过成叶和嫩叶铝含量随土壤pH值的变化关系和土壤溶液中铝的存在形态与土壤pH值的关系之比较，初步推测茶叶吸收土壤的铝以Al〓离子为主；由于土壤pH值是影响茶叶吸收铝的主要土壤化学因素，因此，提高茶园土壤pH值，降低土壤酸度是降低茶叶铝含量的有效手段。

The optimum conditions of extracting cystine were confirmed, as follows: the waste wool pretreatment conditions are pH10, alkali solution temperature 50 ℃ and dry temperature 80 ℃; the waste wool hydrolysis conditions are hydrochloric acid concentration 32%, acid to hairs ratio 1.8:1, hydrolysis temperature 120 ℃, and hydrolys...

研究了预处理、酸解条件、脱色对羊毛胱氨酸提取量的影响，得出了最佳提取胱氨酸的条件，即在pH值为10、碱液温度50℃、烘干温度80℃预处理后的羊毛，在质量分数32%的盐酸、酸毛比1.8：1、水解温度120℃的条件下水解8h。经检测，按所优化工艺提取的胱氨酸符合标准。

Melting point 3410 ℃, boiling point 560 ℃, relative density of 1935, F the external electronic structure of 5d46s2, in the chemical reaction time is very easy to lose 1-6 electronic, but also can get 1-2 electronic, so oxidation number of 0,± 1,± 2, 3, 4 , 5 and 6, with 6 price of the most stable compounds, such as WO3 does not dissolve in water, the air will form in the tungsten trioxide thin protective layer of tungsten, tungsten with fluorine at room temperature, chemical combination, red hot when there is no moisture and Bromine iodide together, red hot when you can and water reaction WO3, at room temperature reaction of tungsten with aqua regia, but the hot concentrated hydrochloric acid and sulfuric acid can only be played with its weak response, but molten nitrate, nitrite, too Hydrogen peroxide, sulfur steam, steam and other phosphorus can play intense reaction, high temperature can not be carbon, boron and silicon reaction of binary compounds, widely used in industrial tungsten steel and tungsten carbide, pure tungsten filament is used to the system, and X-ray tube Tube heating components, semiconductor components can be prepared tungsten silicide, tungsten industrial production is white or black tungsten ore tungsten ore refining.

熔点3410℃，沸点560℃，相对密度1935，F外围电子结构为5d46s2，在化学反应时很容易丢掉1—6个电子，也能得到1—2个电子，所以氧化数为0、±1、±2、＋3、＋4、＋5和＋6，以＋6价化合物最稳定，如WO3不溶于水，空气中的钨会形成薄层三氧化钨保护层，钨能与氟在室温下化合，红热并无潮气时能与溴、碘化合，红热时还能和水反应生成WO3，室温下钨可与王水反应，但热的浓盐酸和硫酸只能与其起微弱反应，但对熔融的硝酸盐、亚硝酸盐、过氧化氢、硫蒸汽、磷蒸汽等能起激烈反应，高温下不能与碳、硼和硅反应生成二元化合物，工业上广泛使用钨钢和碳化钨，纯钨用来制灯丝、电子管和X射线管的发热元件，硅化钨可制半导体元件，钨工业生产是将白钨矿石或黑钨矿石精炼。

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。