高纯八甲基环四硅氧烷制备工艺研究进展

高纯八甲基环四硅氧烷广泛应用于光通讯行业,更是集成电路等电子工业生产中不可缺少的基础和支撑材料之一。文章重点介绍了高纯八甲基环四硅氧烷(D4)的除杂提纯工艺,包括精馏法、络合精馏法、结晶-真空抽滤法、金属去除剂除杂法,分析了各个方法的优点及限制其广泛应用的制约因素,最后展望了高纯八甲基环四硅氧烷提纯除杂技术未来的发展方向。

Behaviour of Tributylamine as Entrainer for the Separation of Water and Acetic Acid with Reactive Extractive Distillation

A new separation method, reactive extractive distillation, was put forward for separating water and acetic acid. The separation mechanism was analyzed through infrared spectra technique. Isobaric vapor-liquid equilibrium (VLE) data at 101.33 kPa for the binary or ternary systems consisting of water, acetic acid and tributylamine were measured. The activity coefficients were correlated by using Wilson, NRTL, and UNIQUAC Equations.The VLE experiment showed that tributylamine could enhance the relative volatility of water to acetic acid. An extractive distillation experiment was carried out and proved that tributylamine was a good extractive solvent.

国内高纯八甲基环四硅氧烷的研究进展

高纯八甲基环四硅氧烷(D_(4))是制造光纤预制棒、中低介电常数集成电路薄膜的基础原料之一。随着国内5G、物联网、工业及军事现代化的逐步推进,高纯D_(4)已然成为国家战略性新材料。文中介绍了D_(4)的主要生产过程,综述了高纯D_(4)的制备方法,包括吸附精馏、络合精馏、蒸馏萃取、结晶精馏等方法。最后,展望了高纯D_(4)制备技术的发展趋势。