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四氟化硅 [sì fú huà guī]
[无化] silicon tetrafluoride
- 该磷肥生产车间的空气污染物主要为氟化物（氟化氢和四氟化硅），其次还有少量的氨和二氧化硫。
Fluorides are main pollutants in this factory, there is also ammonia and sulfur dioxide in small amounts. - 以5-氟尿嘧啶为原料经硅醚化、和四乙酰核糖缩合、皂化、酮缩醇形成、碘化、氢解及水解等反应合成了去氧氟尿苷。本法工艺简便、条件缓和、原料易得、成本低，总收率达54.6。
Doxifluridine was facilely synthesized from 5-fluorouracil in overall yield of 54.6% via trimethyl silylation, condensation, saponification, ketal formation, iodation, hydrogenolysis and hydrolysis. - 本发明最终可将粗四氟化硅的纯度提纯至99.5％以上，完全满足电子和半导体行业的使用要求。
The coarse silicon tetrafluoride can be finally purified to the purity of more than 99.5% by the invention, thereby the use requirements of electron and semiconductor trades are completely satisfied.
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