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    • 4. 发明授权
    • Method for the complete dissolution of mineral samples
    • 矿物样品完全溶解的方法
    • US4044116A
    • 1977-08-23
    • US692720
    • 1976-06-04
    • Kent J. EisentrautShib C. Chattoraj
    • Kent J. EisentrautShib C. Chattoraj
    • B01F1/00C22B3/06C22B34/32C22B35/00
    • C22B3/06B01F1/0005C22B34/32C22B35/00Y02P10/234Y10T436/25125
    • A method for the complete dissolution of "hard to dissolve" mineral samples, such as lunar and geological samples, wherein milligram amounts of a sample in particulate form is successively mixed while heating with small amounts of hydrofluoric acid and a mixture of sulfuric acid and distilled, demineralized water. Heating of the resulting solution is continued until its volume is reduced to about 2 milliliters after which the solution is rapidly cooled to room temperature. After adding a small amount of distilled, demineralized water, it is heated while swirling to provide a crystal clear solution. When dissolving lunar or other samples containing beryllium and chromium, an amount of a solution of sodium hydroxide is added to the crystal clear solution that is sufficient to bring the pH of the solution to about 2.5. The method makes it possible to completely dissolve mineral samples rapidly and efficiently for subsequent accurate chemical analysis.
    • 一种完全溶解“难溶解”的矿物样品(如月球和地质样品)的方法,其中将毫克数的颗粒状样品连续混合,同时用少量氢氟酸和硫酸和蒸馏的混合物加热 ,软化水。 继续加热所得溶液直到其体积减少至约2毫升,然后将溶液快速冷却至室温。 加入少量蒸馏水后,加热,同时旋转,提供清澈透明的溶液。 当溶解含有铍和铬的月球或其他样品时,将一定量的氢氧化钠溶液加入到足以使溶液的pH达到约2.5的透明溶液中。 该方法可以快速有效地完全溶解矿物样品,以便后续的精确化学分析。
    • 5. 发明授权
    • Galling resistant austenitic stainless steel
    • 耐磨奥氏体不锈钢
    • US4039356A
    • 1977-08-02
    • US552357
    • 1975-02-24
    • William J. SchumacherHarry Tanczyn
    • William J. SchumacherHarry Tanczyn
    • C22C38/58C22B35/00C22C38/40
    • C22C38/58
    • An austenitic stainless steel having excellent galling resistance by reason of a silicon-containing surface oxide film and a high work hardening rate, good wear resistance, good corrosion resistance in chloride-containing environmets, and excellent oxidation resistance, containing 10% to 25% chromium, 3% to 15% nickel, 6% to 16% manganese, 2% to 7% silicon, 0.001% to 0.25% carbon, 0.001% to 0.4% nitrogen, and balance iron except for incidental impurities. Up to 4% molybdenum, up to 4% copper, 0.09% maximum phosphorus, up to 0.25% maximum sulfur and up to 0.50% maximum selenium may be present. The steel is readily workable on ordinary equipment into plate, sheet, strip, bar, rod and like wrought products.
    • 奥氏体不锈钢由于含硅表面氧化膜而具有优异的耐烧蚀性,并且具有高的加工硬化率,良好的耐磨性,含氯环境中的良好的耐腐蚀性和优异的抗氧化性,含有10%至25%的铬 ,3%至15%的镍,6%至16%的锰,2%至7%的硅,0.001%至0.25%的碳,0.001%至0.4%的氮,以及余量的铁,除了偶然的杂质。 高达4%的钼,高达4%的铜,0.09%的最大磷,最多0.25%的最大硫和最多达0.50%的最大硒。 这种钢在普通的设备上很容易用于板,板,条,棒,棒等锻造产品中。
    • 9. 发明授权
    • Extraction of beryllium from ores
    • US3704091A
    • 1972-11-28
    • US3704091D
    • 1970-12-21
    • ANACONDA CO
    • GRUNIG JAMES KDAVIS WILLIAM BAITKENHEAD WILLIAM C
    • C22B35/00C22B59/00
    • C22B35/00
    • THE EXTRACTION AND THE RECOVERY OF BERYLIUM SUBSTANTIALLY DEVOID OF ZINC AND OTHER IMPURITES FROM LOW AND MEDIUM GRADE ACID-LEACHABLE BERYLLIUM BEARING ORES IS ACCOMPLISHED BY ACID-LEACHING AT A PH IN THE RANGE FROM ABOUT 1.2 TO ABOUT 2, PREFERABLY BETWEEN 1.3 AND 1.5, AND ADVANTAGEOUSLY WITH THE AID OF A SOLUBLE FLUORIDE ADDITIVE FOLLOWED BY RAISING THE PH OF THE LEACH LIQUOR INITIALLY TO ABOVE 3.0 BUT BELOW ABOUT 4.5 AND FINALLY TO ABOVE 7.5 BUT BELOW 9.0 TO PRECIPITATE BERYLLIUM HYDROXIDE THEREFROM. IN THE INITIAL PH RAISING STEP, ALUMINUM IS PRECIPITATED FROM THE LEACH SOLUTION. AFTER FILTRATION TO REMOVE THE PRECIPITATE, A CHELATING AGENT SUCH AS EDTA MAY BE ADDED TO THE FILTRATE PRIOR TO THE SECOND PH RAISING STEP FOR THE PRECIPITATION OF BERYLLIUM VALUES THEREFROM. THE PRECIPITATED BERYLLIUM HYDROXIDE IS FURTHER PURIFIED BY REDISSOLUTION HYDROLYSIS IN SODIUM HYDROXIDE SOLUTION. ALTERNATIVELY, IT MAY BE TREATED WITH STRONG AND HOT CONCENTRATED SULFURIC ACID PRIOR TO THE PRECIPITATION OF BERYLLIUM VALUES AS A HYDROXIDE. THE ZINC IS REMOVED FROM THE FINAL BERYLLIUM PRODUCT BY TREATING THE LEACH LIQUOR WITH A SOLUBLE SULFIDE AFTER THE INITIAL PH RAISING STEP OR BEFORE THE HYDROLYSIS OF THE REDISSOLVED BERYLLIUM HYDROXIDE.