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US3395975A - Precipitation of beryllium from ores

Precipitation of beryllium from ores Download PDF Info Publication number US3395975A. US3395975A US31647463A US3395975A US 3395975 A US3395975 A US 3395975A US 31647463 A US31647463 A US 31647463A US 3395975 A US3395975 A US 3395975A Authority US United States Prior art keywords beryllium leach liquor filtrate acid

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US3699208A - Extraction of beryllium from ores -

The extraction and the recovery of beryllium substantially devoid of zinc and other impurities from low and medium grade acid-leachable berllium bearing ores, e.g., bertrandite, is accomplished by acid leaching at a pH below about 2 but above about 1.2, preferably between 1.3 and 1.5, and advantageously with the aid of a soluble fluoride additive to recover the beryllium in solution with relatively small

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EXTRACTION OF BERYLLIUM FROM ORES -

In the beryllium precipitation (deberyllization) step, boiling for two hours is generally adequate. The precipitate, which is readily filtered because it is granular in character, is subjected to a series of decantings, washings, and filterings as shown in the accompanying flow sheet to

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Precipitation of beryllium from homogeneous

It has been possible to determine beryllium accurately in 60 mg of beryllium oxide in the Precipitation of beryllium from homogeneous solution 1519 presence of 0-7 g of calcium, 0-3 g of magnesium and 0-12 g of manganese. Co- precipitation is reduced to about a third of that found in the standard precipitation with ammonia.

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SOLVENT EXTRACTION, RECOVERY, AND

27-03-2021  Abstract. An investigation was made of the selective solvent extraction of beryllium from sulfate liquors by means of esters of orthophosphoric acid. The sulfate liquors were obtained from the treatment of beryl flotation concentrates. The preferred extractant is di- (2-ethylhexyl) phosphoric acid dissolved in kerosene.

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Beryllium‐10 and beryllium‐7 in precipitation in

Beryllium‐10 and beryllium‐7 have been measured in monthly precipitation samples at a high (Jungfraujoch, 46.32°N 7.59°E, 3580 m) and a low (Dübendorf, 47.25°N 8.27°E,

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Beryllium - Properties, History, and Applications

15-01-2020  Beryllium is extracted from two types of ores; beryl (Be 3 Al 2 (SiO 3) 6) and bertrandite (Be 4 Si 2 O 7 (OH) 2). While Beryl generally has a higher beryllium content (three to five percent by weight), it is more difficult to refine than bertrandite, which on average contains less than 1.5 percent beryllium.

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Environment - Be Responsible – Beryllium Product

Beryllium in sediment is primarily adsorbed to clay, but some beryllium may be in sediment as a result of the formation and precipitation of insoluble complexes. At neutral pH, most soluble beryllium salts dissolved in water will be hydrolysed to insoluble beryllium hydroxide, and only trace quantities of dissolved beryllium will remain.

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Standard Test Methods for Chemical Analysis of

4.1 These test methods for the chemical analysis of beryllium metal are primarily intended as referee methods to test such materials for compliance with compositional specifications. It is assumed that all who use these test methods will be trained analysts capable of performing common laboratory procedures skillfully and safely.

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The study of the process of alkaline precipitation ...

The study of the process of alkaline precipitation purification of solutions from silicon macroscales in the ammonium-fluoride processing of beryllium-containing materials

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SOLVENT EXTRACTION, RECOVERY, AND

27-03-2021  Abstract. An investigation was made of the selective solvent extraction of beryllium from sulfate liquors by means of esters of orthophosphoric acid. The sulfate liquors were obtained from the treatment of beryl flotation concentrates. The preferred extractant is di- (2-ethylhexyl) phosphoric acid dissolved in kerosene.

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Precipitation of beryllium from homogeneous

CONCLUSION Beryllium can be precipitated as a dense and easily filterable precipitate by the hydrolysis of urea in the presence of sulphate. The method can be applied to the Precipitation of beryllium from homogeneous solution 1523 determination of beryllium as

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Beryllium‐10 and beryllium‐7 in precipitation in

The amount of precipitation was between 0.5 and 10 kg month −1. Errors due to evaporation are not taken into account. However, the amount of precipitation measured agrees generally well with precipitation data in Zürich measured by the Swiss Federal

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EXTRACTION OF BERYLLIUM FROM ORES -

In the beryllium precipitation (deberyllization) step, boiling for two hours is generally adequate. The precipitate, which is readily filtered because it is granular in character, is subjected to a series of decantings, washings, and filterings as shown in the accompanying flow sheet to

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Standard Test Methods for Chemical Analysis of

Beryllium. 97.5 to 100 Beryllium Oxide 0.3 to 3 Carbon 0.05 to 0.30. Copper 0.005 to 0.10. Chromium 0.005 to 0.10. Iron 0.05 to 0.30. Magnesium 0.02 to 0.15. Nickel 0.005 to 0.10. Silicon 0.02 to 0.15

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Beryllium - Properties, History, and Applications

15-01-2020  Beryllium is extracted from two types of ores; beryl (Be 3 Al 2 (SiO 3) 6) and bertrandite (Be 4 Si 2 O 7 (OH) 2). While Beryl generally has a higher beryllium content (three to five percent by weight), it is more difficult to refine than bertrandite, which on average contains less than 1.5 percent beryllium.

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The study of the process of alkaline precipitation ...

The study of the process of alkaline precipitation purification of solutions from silicon macroscales in the ammonium-fluoride processing of beryllium-containing materials

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Beryllium Ores Article about Beryllium Ores by

The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased. Beryllium Ores mineral formations that contain beryllium in quantities such that its extraction is feasible at modern technical and economic levels. Beryllium is found in the ores mainly in the form of the minerals themselves, as well as in ...

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Fluorination of beryllium concentrates with

New method for processing of beryllium ores to beryllium oxide was suggested and studied. The method is based on decomposition of bertrandite or phenacite with ammonium chloride, with the subsequent leaching of ammonium tetrafluoroberyllate and precipitation from a beryllium hydroxide solution. The thermodynamic characteristics were calculated and a thermogravimetric analysis of the

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Physics and chemistry of beryllium - Materion

lution to 95°C causes nearly quantitative precipitation of beryllium basic carbonate 2 BeCO3 Be(OH)2. After filtration and repulping in deionized water, further heating to 165°C yields a beryllium hydroxide product.

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Precipitation of beryllium from homogeneous

CONCLUSION Beryllium can be precipitated as a dense and easily filterable precipitate by the hydrolysis of urea in the presence of sulphate. The method can be applied to the Precipitation of beryllium from homogeneous solution 1523 determination of beryllium as

More

Beryllium‐10 and beryllium‐7 in precipitation in

The amount of precipitation was between 0.5 and 10 kg month −1. Errors due to evaporation are not taken into account. However, the amount of precipitation measured agrees generally well with precipitation data in Zürich measured by the Swiss Federal

More

Physics and chemistry of beryllium - Materion

lution to 95°C causes nearly quantitative precipitation of beryllium basic carbonate 2 BeCO3 Be(OH)2. After filtration and repulping in deionized water, further heating to 165°C yields a beryllium hydroxide product.

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GRAVIMETRIC DETERMINATION OF SMALL

osti.gov journal article: gravimetric determination of small amounts of beryllium in ores and the products of their treatment

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Beryllium Be - PubChem

Beryllium enters the environment principally from coal combustion. Be contents in the ashes from a Czechoslovakian power plant were determined (coarse > 20 mm) and fine (2.0 to 0.2 mm) fraction from dump, and fine (0.2 mm) fraction from electrostatic precipitators).

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Beryllium Ores Article about Beryllium Ores by

The minor beryllium minerals are bavenite (6–7 percent BeO), euclase (16–20 percent), beryllium-containing margante (1–3 percent), and leucophanite (10–12 percent). The beryllium minerals are extracted from ores manually as well as by concentration from finely disseminated ores—chiefly by flotation—obtaining standard concentrates with 10, 8, and 5 percent BeO.

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Beryllium‐7 in soils and vegetation along an arid ...

An annual precipitation map published by Danskin was the most detailed interpretation of precipitation patterns applicable to this study. Across our ∼30 km study area on the valley floor, precipitation varies from approximately 10 to 16 cm per year, but our high elevation site above the valley floor receives approximately 25 cm of precipitation per year, mostly occurring as snowfall.

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REFINING LOW-GRADE BERYLLIUM ORES BY

The present invention contemplates a simple, relatively inexpensive and efficient process for the recovery of beryllium from low-grade beryllium-containing ores, wherein the low-grade ore in a substantially dry condition is reacted directly with anhydrous sulfur trioxide at a temperature below 350° C., preferably in the range from 50° to 350° C., to form water soluble beryllium sulfate.

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The study of the process of alkaline precipitation ...

The study of the process of alkaline precipitation purification of solutions from silicon macroscales in the ammonium-fluoride processing of beryllium-containing materials

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Precipitation Hardening Copper Alloys -

The cause for precipitation hardening of CuBe materials is the rapidly diminishing solubility of beryllium in copper as temperature decrease. As the phase diagram for CuBe shows, 2.4 wt% of Be are soluble in Cu at 780°C Figure 1. In this temperature range annealed CuBe alloys are

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Release of beryllium from mineral ores in artificial

Exposure to some manufactured beryllium compounds via skin contact or inhalation can cause sensitization. A portion of sensitized persons who inhale beryllium may develop chronic beryllium disease (CBD). Little is understood about exposures to naturally occurring beryllium minerals.

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Beryllium Ores Article about Beryllium Ores by

The minor beryllium minerals are bavenite (6–7 percent BeO), euclase (16–20 percent), beryllium-containing margante (1–3 percent), and leucophanite (10–12 percent). The beryllium minerals are extracted from ores manually as well as by concentration from finely disseminated ores—chiefly by flotation—obtaining standard concentrates with 10, 8, and 5 percent BeO.

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Beryllium-7 Wet Deposition in Open

Short-lived cosmogenic isotopes, such as beryllium-7 (7Be), are increasingly used in forested watersheds as tracers of erosion and sediment movement. Beryllium-7 is produced in the atmosphere and is delivered to Earth's surface primarily in precipitation. However, relatively little published data are available to document the influence of tree canopy on the 7Be activity that reaches the soil ...

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Comparative chronic inhalation toxicity of

Comparative chronic inhalation toxicity of beryllium ores, bertrandite and beryl, with production of pulmonary tumors by beryl. Wagner WD, Groth DH, Holtz JL, Madden GE, Stokinger HE. PMID: 4307951 [PubMed - indexed for MEDLINE] MeSH Terms. Adenocarcinoma, Papillary/chemically induced* Adenoma/chemically induced* Aluminum Silicates/analysis

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Beryllium and compounds National Pollutant

Mining of ores containing beryllium can contribute to higher levels in air, soil and water, i.e. small quantities of beryl are produced as a by-product of feldspar mining at Broken Hill (NSW). Emissions to air can result from combustion of coal and oil in power plants.

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Mineral Commodity Report 19 - Beryllium, Gallium, Lithium ...

Two processes are used to extract beryllium oxide or hydroxide from beryl ore. In the first the beryllium is selectively extracted by roasting beryl with sodium fluorosilicate at 700-750oC and leaching the product with water to extract soluble beryllium fluorides (Copaux process). Beryllium is recovered from the fluoride leach liquors by precipitation

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REFINING LOW-GRADE BERYLLIUM ORES BY

Process for the recovery of beryllium from a substantially dry beryllium-containing ore which comprises reacting said ore directly with anhydrous sulfur trioxide at a temperature below 350° C. to form beryllium sulfate, leaching the reacted ore with an aqueous medium to dissolve the beryllium sulfate, separating the resulting solution from the insoluble residue, and recovering beryllium from the leach solution.

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3. HEALTH EFFECTS

Beryllium is a lightweight metal that has many uses, including some in the aerospace industry. Beryllium is present in the earth as beryllium ores, such as beryl and bertrandite. Most beryllium compounds are poorly soluble in water. The most common compound is beryllium

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Beryllium‐7 in soils and vegetation along an arid ...

1. Introduction [2] Cosmogenic 7 Be (T 1/2 = 53 d) is formed primarily in the stratosphere and upper troposphere as neutrons spallate gas molecules [Lal et al., 1958].Most 7 Be is delivered to the surface by wet deposition, and inventories on temperate and tropical land are 200 to 1000 Bq m −2 [Kaste and Baskaran, 2011].Meteoric isotopes of Be (7 Be and 10 Be) are being applied more ...

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HTS Code of Beryllium Ores And Concentrates is

HTS code of Beryllium ores and concentrates is 2617900030 in USA.

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