Rhenium density of 21.04 g/cm 3, melting point is 3180 ℃, boiling point is 5627 ℃.Hexagonal dense lattice type.With platinum, a pure rhenium soft, good mechanical properties.Soluble in dilute nitric acid or hydrogen peroxide solution.Insoluble in hydrochloric acid and hydrofluoric acid.Under high temperature, and steam combine and form of sulfur vulcanization rhenium ReS2.Not with hydrogen, nitrogen, but can absorb H2.Valence has 3, 4, 6, and 7.Seven oxide can be oxidized to very stable rhenium Re2O7, this is the special nature of rhenium.
Discovery
Rhenium is scattered elements, find later.1872 russians mendeleev based on element periodic law predicts that exist in nature a yet to be discovered atomic weight of 190 manganese "class" element.In 1925, German chemist's tak with spectral method in niobium ferromanganese ore was found in this element, named after the name of the Rhine Rhein for rhenium.Later, mike found s.h. molybdenum rhenium mainly exist, and extracted the metal rhenium.Rhenium because of poor resources, the price is expensive, less research for a long time.1950 years later, the rhenium start application in modern technology, production development.China in the 60 s smoke extract rhenium from molybdenum concentrates roasting.
Source
Rhenium extraction of metallurgical rhenium extraction principle of metallurgical process rhenium extraction process mainly includes the principle of metallurgical processes including rhenium raw material production, the molybdenum rhenium separation, rhenium compounds from middle, coarse rhenium powder preparing and rhenium refining steps, such as densification of rhenium extraction technique principle flow chart shown in figure.Dense rhenium from industrial production of rhenium ingot or article rhenium method has two kinds of high temperature sintering and smelting method.
Element USES
Rhenium extraction of metallurgical rhenium extraction principle of metallurgical process rhenium extraction process mainly includes the principle of metallurgical processes including rhenium raw material production, the molybdenum rhenium separation, rhenium compounds from middle, coarse rhenium powder preparing and rhenium refining steps, such as densification of rhenium extraction technique principle flow chart shown in figure.Dense rhenium from industrial production of rhenium ingot or article rhenium method has two kinds of high temperature sintering and smelting method.
physical property
Rhenium is silvery white or gray to black metal powder, melting point 3180 ℃, boiling point 5627 ℃, relative density 20.53. Metal rhenium is very hard, wear-resisting, corrosion resistance.
Chemical property
Rhenium electron configurations for Xe 4 f145d56s2, oxidation state have 0, 1, + 1, + 2, + 3, + 4, + 5, + 6 + 7, mainly oxidation state to + 3, + 4, + 5, + 7.Rhenium chemical lively sex depends on his state of aggregation, powder metal rhenium and lively.Rhenium insoluble in hydrochloric acid, soluble in nitric acid, generate high rhenium acid: 3 re + 7 hno3 - > 3 hreo4 + 7 no + 2 h2o.It is soluble in ammonia containing hydrogen peroxide solution, generating high rhenium acid: re + 2 nh3 + 4 h2o2 nh4reo4 - > 2 + 3 h2. Seven oxide rhenium oxide rhenium Re2O7, rhenium dioxide ReO2, rhenium oxide ReO3, rhenium trioxide Re2O3 and oxide rhenium Re2O, etc.Seven oxide rhenium for yellow solid, soluble in water, forming high rhenium HReO4 acid.Three the rhenium oxide red, not soluble in water.Rhenium dioxide to black. Rhenium with sulfur compound generated rhenium disulfide vapor at high temperature.Rhenium with fluorine, chlorine and bromine reaction generated in halogen halide.Such as tetrafluoride rhenium ReF4, five fluorinated rhenium ReF5, rhenium hexafluoride ReF6, seven fluoride rhenium ReF7, pentachloride rhenium ReCl5, six chlorinated ReCl6 rhenium, trichloride rhenium ReCl3 and so on. Rhenium halide and halogen oxides are easy to hydrolysis.ReCl3 was 3 get together the red solid, covalent compound, electrolyte in solution.Tetravalent rhenium can form a variety of coordination compounds. Rhenium can Re formation of carbonyl compounds (CO) 5 and high rhenium M3ReO5 acid salt (M is a valence metal), manganese and technetium similar salt formation. Roasting molybdenite flue dust and refined copper anode mud contain seven oxide rhenium.Water leaching, filtering, adding potassium chloride makes high rhenium acid potassium KReO4 exhalation.At 800 ℃ after recrystallization with hydrogen reduction, can be obtained metal rhenium: 2 kreo4 + 7 h2 - > 2 re + 6 h2o + 2 koh.
Geological data
Biology data
Detailed information
Rhenium electron configurations for Xe 4 f145d56s2, oxidation state have 0, 1, + 1, + 2, + 3, + 4, + 5, + 6 + 7, mainly oxidation state to + 3, + 4, + 5, + 7.Rhenium chemical lively sex depends on his state of aggregation, powder metal rhenium and lively.Rhenium insoluble in hydrochloric acid, soluble in nitric acid, generate high rhenium acid: 3 re + 7 hno3 - > 3 hreo4 + 7 no + 2 h2o.It is soluble in ammonia containing hydrogen peroxide solution, generating high rhenium acid: re + 2 nh3 + 4 h2o2 nh4reo4 - > 2 + 3 h2. Seven oxide rhenium oxide rhenium Re2O7, rhenium dioxide ReO2, rhenium oxide ReO3, rhenium trioxide Re2O3 and oxide rhenium Re2O, etc.Seven oxide rhenium for yellow solid, soluble in water, forming high rhenium HReO4 acid.Three the rhenium oxide red, not soluble in water.Rhenium dioxide to black. Rhenium with sulfur compound generated rhenium disulfide vapor at high temperature.Rhenium with fluorine, chlorine and bromine reaction generated in halogen halide.Such as tetrafluoride rhenium ReF4, five fluorinated rhenium ReF5, rhenium hexafluoride ReF6, seven fluoride rhenium ReF7, pentachloride rhenium ReCl5, six chlorinated ReCl6 rhenium, trichloride rhenium ReCl3 and so on. Rhenium halide and halogen oxides are easy to hydrolysis.ReCl3 was 3 get together the red solid, covalent compound, electrolyte in solution.Tetravalent rhenium can form a variety of coordination compounds. Rhenium can Re formation of carbonyl compounds (CO) 5 and high rhenium M3ReO5 acid salt (M is a valence metal), manganese and technetium similar salt formation. Roasting molybdenite flue dust and refined copper anode mud contain seven oxide rhenium.Water leaching, filtering, adding potassium chloride makes high rhenium acid potassium KReO4 exhalation.At 800 ℃ after recrystallization with hydrogen reduction, can be obtained metal rhenium: 2 kreo4 + 7 h2 - > 2 re + 6 h2o + 2 koh.
