| METHOD OF PROCESSING AMMONIUM POLYFLUORIDE AND METHOD OF PRODUCING NITROGEN TRIFLUORIDE USED THEREIN | |
| 2024-03-28 | |
| 专利权人 | NOVYE KHIM PRODUKTY LLC (NOVY-Soviet Institute) |
| 申请日期 | 2024-03-28 |
| 专利号 | RU2829882-C1 |
| 成果简介 | NOVELTY - Invention relates to methods of processing ammonium polyfluoride and producing nitrogen trifluoride NF3 by fluorination of ammonium polyfluoride with fluorine. Method of processing ammonium polyfluoride involves fluorination of molten ammonium fluoride with fluorine, neutralization and drying of the gas stream, and removal of volatile impurities. After separating excess liquid ammonium polyfluoride from the fluorination reactor, it is directed for flaking or reacted with oxygen, or with oxygen and carbon, or with oxygen and hydrogen-containing substances, or with oxygen, and with carbon, and with hydrogen-containing substances, or with fluorine, or with fluorine and hydrogen-containing substances with separation of low-boiling substances and extraction of hydrogen fluoride or hydrofluoric acid. Method of producing nitrogen trifluoride involves fluorination of molten ammonium polyfluoride with fluorine, neutralization and drying of gas flow, removal of volatile impurities. Fluorine is fed to the fluorination step, while maintaining acidity of ammonium polyfluoride in the range from NH4F·1,2HF to NH4F·2HF by adding ammonia. Nitrogen trifluoride is purified from difluoroamine, tetrafluorohydrazine and dinitrogen difluoride in a thermocatalytic reactor into which a fluorine stream is fed. Nitrogen trifluoride is purified from fluorine, hydrogen fluoride, silicon tetrafluoride, sulfur-containing acid gases and carbon dioxide with an alkaline solution. Gas flow is dried by zeolite. Impurities with boiling point lower than that of nitrogen trifluoride are removed by low-temperature rectification. Carbon tetrafluoride is separated from nitrogen trifluoride by absorption. USE - Chemical or physical processes. ADVANTAGE - Invention enables to create an integrated, low-waste, explosion-proof technology of producing TPA and a group of inorganic fluorides—nitrogen trifluoride, carbon tetrafluoride, carbon difluoride-oxide, hydrogen fluoride, high-purity hydrofluoric acid. 8 cl, 1 dwg, 11 ex |
| IPC 分类号 | C01B-011/24 ; C01B-021/083 ; C01B-032/10 ; C01B-007/19 |
| 国家 | 俄罗斯 |
| 专业领域 | 化学化工 |
| 语种 | 英语 |
| 成果类型 | 专利 |
| 文献类型 | 科技成果 |
| 条目标识符 | http://119.78.100.226:8889/handle/3KE4DYBR/17485 |
| 专题 | 中国科学院新疆生态与地理研究所 |
| 作者单位 | NOVYE KHIM PRODUKTY LLC (NOVY-Soviet Institute) |
| 推荐引用方式 GB/T 7714 | PASHKEVICH D S,ALEKSEEV YU I,PETROV V B,et al. METHOD OF PROCESSING AMMONIUM POLYFLUORIDE AND METHOD OF PRODUCING NITROGEN TRIFLUORIDE USED THEREIN. RU2829882-C1[P]. 2024. |
| 条目包含的文件 | 条目无相关文件。 | |||||
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