Strontium carbonate,nanometre
Strontium carbonate,nanometre
CAS: 1633-05-2;1633-55-2
Molecular Formula: CO3Sr
Strontium carbonate,nanometre - Names and Identifiers
| Name | Strontium carbonate,nanometre |
| Synonyms | C.I. 77837 strontianite Strontiumcarbonate Strontium carbonate strontiumcarbonate(srco3) strontiumcarbonate,granular Strontium carbonate,nanometre Strontium carbonate,high purity Strontium carbonate,electronic grade |
| CAS | 1633-05-2 1633-55-2 |
| EINECS | 216-643-7 |
| InChI | InChI=1/CH2O3.Sr/c2-1(3)4;/h(H2,2,3,4);/q;+2/p-2 |
| InChIKey | LEDMRZGFZIAGGB-UHFFFAOYSA-L |
Strontium carbonate,nanometre - Physico-chemical Properties
| Molecular Formula | CO3Sr |
| Molar Mass | 147.63 |
| Density | 3.7 g/mL at 25 °C (lit.) |
| Melting Point | 1494 °C (lit.) |
| Boling Point | 333.6°C at 760 mmHg |
| Flash Point | 169.8°C |
| Water Solubility | Soluble in ammonium chloride. Slightly soluble in ammonia and water. |
| Solubility | dilute aqueous acid: slightly soluble(lit.) |
| Vapor Presure | 2.58E-05mmHg at 25°C |
| Appearance | Colorless crystal |
| Specific Gravity | 3.7 |
| Color | white |
| Solubility Product Constant(Ksp) | pKsp: 9.25 |
| Merck | 14,8838 |
| Storage Condition | Inert atmosphere,Room Temperature |
| Stability | Stable. Incompatible with strong acids. |
| Sensitive | Easily absorbing moisture |
| MDL | MFCD00011250 |
| Physical and Chemical Properties | Colorless orthorhombic crystal system, or white fine powder. Insoluble in water, slightly soluble in ammonia, ammonium carbonate, insoluble in alcohol, soluble in ammonium chloride, ammonium nitrate. |
| Use | Basic powder for the production of nanomaterials, electronic components, fireworks materials, rainbow glass, preparation of other strontium salts, production of PTC thermistor elements (switch activation, degaussing, current limiting protection, constant temperature Fever, etc.) |
Strontium carbonate,nanometre - Risk and Safety
| WGK Germany | - |
| TSCA | Yes |
Strontium carbonate,nanometre - Nature
Open Data Verified Data
white powder. Odorless and tasteless. D3.50, melting point 1497 °c (in CO2 atmosphere). It is decomposed into strontium oxide and carbon dioxide at 1100 °c. Soluble in dilute hydrochloric acid, dilute nitric acid and release carbon dioxide, slightly soluble in carbon dioxide containing water and ammonium salt solution, almost insoluble in water, alcohol. Dissolved in water containing carbon dioxide to strontium bicarbonate.
Last Update：2024-01-02 23:10:35
Strontium carbonate,nanometre - Preparation Method
Open Data Verified Data
with high-grade Celite ore and sodium carbonate (or ammonium carbonate) solution reaction, the reaction of strontium carbonate with hydrochloric acid treatment to produce strontium chloride solution, and then sodium carbonate (or ammonium carbonate) precipitation, strontium carbonate
Last Update：2022-01-01 09:03:24
Strontium carbonate,nanometre - Introduction
No smell. Soluble in dilute hydrochloric acid and dilute nitric acid and release carbon dioxide; slightly soluble in water and ammonium salt solutions containing carbon dioxide; insoluble in water. Decompose into carbon dioxide and strontium oxide at 1100 ℃.
Last Update：2022-10-16 17:14:14
Strontium carbonate,nanometre - Use
Open Data Verified Data
is the basic raw material for the production of strontium salt. The glass made of strontium carbonate has strong X-ray absorption ability, and is mostly used for the production of cathode ray tubes of color TV. It is also used for electromagnets and strontium ferrite, which can be made into small motors, magnetic separators and speakers; as a support for palladium, can be
Used for hydrogenation. In addition, it is also used in the production of pyrotechnic, fluorescent glass, signal bomb, paper making, medicine, Analytical reagents, and the refining of sugar, metal zinc electrolyte refining, strontium salt pigment manufacturing.
Last Update：2022-01-01 09:03:24
Strontium carbonate,nanometre - Safety
Open Data Verified Data
packed in plastic woven bags or latex bags lined with polyethylene plastic bags, each with a net weight of 25kg or 50kg. Stored in a cool, ventilated, dry place, should prevent the rain damp caking, to prevent heavy pressure loading and unloading should be handled with light, to prevent packaging rupture; Transport to prevent rain, moisture. Toxicity and protection: inhalation of strontium compound dust can cause moderate diffuse interstitial changes in both lungs. The maximum allowable concentration is 6mg/m3. Work should wear masks to protect the respiratory organs, as when ammonia and inorganic acid into the air, it is appropriate to use B type filter gas masks to prevent inhalation of strontium compounds dust.
Last Update：2022-01-01 09:03:25
Strontium carbonate,nanometre - Reference Information
| update date: | 2022/11/12 8:54:38 |
| EPA chemical information | Information provided by: ofmpub.epa.gov (external link) |
| introduction | strontium carbonate, chemical formula SrCO3, colorless prismatic crystal or white powder. 926 ℃ to hexagonal crystal system. Melting point 1497 ℃(6.08 × 106Pa), relative density 3.70. Slightly soluble in water, slightly soluble in saturated solution of carbon dioxide, soluble in ammonium chloride, ammonium nitrate and carbonic acid solution. It reacts with dilute hydrochloric acid, nitric acid and acetic acid to release carbon dioxide. It starts to decompose at 820 ℃, and gradually loses carbon dioxide at 1340 ℃. It is completely decomposed into strontium oxide and carbon dioxide when it is white hot. The gas can reach 1.01 × 105Pa. |
| application | strontium carbonate is used to manufacture color TV cathode ray tubes, electromagnets, strontium ferrite, fireworks, fluorescent glass, flares, etc. It is also a raw material for the production of other strontium salts and is used as a basic powder for the production of special PTC thermistor elements. As a carrier of palladium, it can be used for hydrogenation. In addition, it is also used in papermaking, medicine, analytical reagents, sugar refining, metal zinc electrolyte refining, strontium salt pigment manufacturing, etc. Strontium carbonate is divided into two specifications: granular and powdery. Granular is mainly used for TV glass in China, powdery is mainly used for producing strontium ferrite magnetic materials, non-ferrous metal smelting, red fireworks and the manufacture of high-purity strontium carbonate for PTC and other advanced electronic components. Mainly used in TV glass and display glass 'production, strontium ferrite, magnetic materials and non-ferrous metal desulfurization and other industries. It is also used in the production of pyrotechnics, fluorescent glass, flares, papermaking, medicine, analytical reagents and other raw materials for the manufacture of strontium salts. |
| Chemical reaction | Strontium carbonate is heated to 1340 ℃ to decompose into strontium oxide and release carbon dioxide. SrCO3 = SrO CO2 strontium carbonate can also be dissolved in ammonium nitrate or ammonium chloride solution. SrCO3 2NH4NO3 (concentrated) = Sr(NO3)2 (NH4)2CO3SrCO3 2 NH4Cl (concentrated) = SrCl2 (NH4)2CO3 strontium carbonate can dissolve in dilute acid and release carbon dioxide. Strontium carbonate reacts with hydrogen cyanide solution of cobalt sulfate or water as follows: SrCO3 H2O (superheated steam) = Sr(OH)2 CO25SrCO3 2CoSO4 12HCN 15H2O = 2SrSO4 Sr3[Co(CN6)]2.20H2O 5CO2 H2 |
| natural resources | the main component of celestite ore is strontium sulfate, which is an important mineral source of strontium. Qinghai, Jiangsu, Sichuan, Yunnan, Xinjiang and other places are its main distribution areas, of which Qinghai has about 80% reserves and is now mainly used to produce strontium carbonate. China's celestite production peaked at 157,300 t in 2012 and fell to 61,600 t in 2018, a decrease of 60.8%. |
| toxicity | inhalation of strontium compound dust can cause moderate diffuse interstitial changes in both lungs. The maximum allowable concentration is 6 mg/m3. A mask should be worn at work to protect the respiratory organs. As when ammonia and inorganic acids are used to drain the air, it is advisable to use B- type filter gas masks to prevent the inhalation of dust from strontium compounds. |
| use | used to manufacture color TV cathode ray tubes, electromagnets, strontium ferrite, fireworks, fluorescent glass, flares, etc., and is also a raw material for the production of other strontium salts It is used as the basic powder for the production of special PTC thermistor components (switch start, degaussing, current limiting protection, constant temperature heating, etc.) is the basic raw material for the production of strontium salts. Glass made of strontium carbonate has a strong ability to absorb x-rays and is mostly used in the production of cathode ray tubes for color televisions. It is also used in electromagnets and strontium ferrite, and can be made into small motors, magnetic separators and speakers. As a carrier of palladium, it can be used for hydrogenation. In addition, it is also used in the production of pyrotechnics, fluorescent glass, flares, papermaking, medicine, analytical reagents, sugar refining, metal zinc electrolyte refining, strontium salt pigment manufacturing, etc. Used in the preparation of electronic components, fireworks materials, rainbow glass, other strontium salts, etc. Used in the production of strontium compounds, fireworks, red glass, medicine, magnetic materials and other industries Used in the production of nanomaterials, Electronic components, fireworks materials, rainbow glass, other strontium salt preparation, PTC thermistor components (switch start, degaussing, current limiting protection, constant temperature heating, etc.) production of basic powder making fluorescent glass, strontium salt to remove lead, dehydrogenating agent, purification of sugar. High purity strontium carbonate is used as thick film circuit material, and piezoelectric crystal is used to make rainbow glass. |
| production method | metathesis method pulverizes celestite and reacts with soda ash solution for 2 hours at a reaction temperature of 100 ℃. The initial concentration of sodium carbonate is 20%, the amount of sodium carbonate added is 110% of the theoretical amount, and the particle size of mineral powder is 80 mesh. Under this condition, the decomposition rate can reach more than 97%. After filtration, the concentration of sodium sulfate in the filtrate can reach 24%. Crude strontium carbonate is beaten with water, hydrochloric acid seasoning slurry is added to pH3, barium remover is added to remove barium at a temperature of 90~100 ℃ for 2~3 hours, ammonia water is used to adjust the slurry to pH6.8 ~ 7.2 to remove impurities, strontium carbonate is precipitated from the filtrate after filtration with ammonium bicarbonate or ammonium carbonate solution, ammonium chloride solution is filtered to remove, and the filter cake is dried to obtain strontium carbonate finished product. Its SrSO4 + Na2CO3 → SrCO3 + Na2SO4SrCO3 + 2HCl → SrCl2 + CO2 ↑ + H2OSrCl2 + NH4HCO3 → SrCO3 + NH4Cl + HCl coal reduction method celestite and pulverized coal are crushed, with 20-purpose coal as raw material, the ratio of ore to coal is 1:0.6~1:0.7, and the calcined product is leached twice and washed once at a temperature of 1100~1200 ℃ for 0.5~1.0 h, the leaching temperature is 90 ℃, each leaching is 3h, the total leaching rate can reach more than 82%, the leaching solution is filtered, the filter residue is further recovered after hydrochloric acid leaching, the filtrate is added with mirabilite solution to remove barium, and then ammonium bicarbonate or sodium carbonate solution is added to react to generate strontium carbonate precipitation (or directly carbonized with carbon dioxide), and then separated, dried, and ball milled to obtain the finished product of strontium carbonate. Its SrSO4 + 2C → SrS + 2CO22SrS 102H2O → Sr(OH)2 + Sr(HS)2Sr(OH)2 + Sr(HS)2+2NH4HCO3 → 2Sr(CO3 + 2NH4HS + 2H2O strontium ore pyrolysis method pulverizes strontium ore and coke, mixes them according to the ratio of ore: coke = 10:1 (weight ratio), and roasts at 1150~1250 ℃, the carbonate is decomposed to produce clinker containing strontium oxide and other metal oxides. Clinker is subjected to three-stage leaching, and the leaching temperature is preferably 95 ℃, 2. three-stage leaching can be performed. At 70-80 ℃. The concentration of strontium hydroxide in the leaching solution is 1mol/L, which is beneficial to the separation of impurities Ca2 + and Mg2 +. Ammonium bicarbonate is added to the filtrate for carbonization to obtain strontium carbonate, which is then separated, dried and crushed to obtain strontium carbonate finished product. Its SrCO3 → SrO + C02 ↑ SrO + H2O → Sr(OH)2Sr(OH)2 + NH4HCO3 → SrCO3 ↓ + NH3 · H2O + H2O comprehensive utilization method from underground brine containing bromine and strontium, the strontium-containing mother liquor after bromine extraction is neutralized with lime, concentrated and cooled by evaporation, sodium chloride is removed, calcium is removed by caustic soda, and ammonium bicarbonate is added to convert strontium hydroxide into strontium carbonate precipitation, after rinsing and drying, the finished product of strontium carbonate is produced. Its SrC12 + 2NaOH → Sr(OH)2 +2NaClSr(OH)2 + NH4HCO3 → SrCO3 + NH3 · H2O |
| toxic substance data | information provided by: pubchem.ncbi.nlm.nih.gov (external link) |
Last Update：2024-04-09 19:05:10
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