This paper is mainly concerned about how to purify the industrial products of the antioxidant d and bht , how to determine their purities , determining their purities and the purities need to be more than 99 % . in order to attain this objective , the recrystalizing method is used to purify antioxidant d and antioxidant bht . the methods of high performance liquid chromatography ( hplc ) is used to determine the chemical composition of the antioxidant d and bht , it is qualitative analysis 本论文是以防老剂d与bht工业品为主要原料制备防老剂d与bht标准物质,首先进行了防老剂d与bht的提纯和熔点的测定试验,并通过实验确定了防老剂d与bht重结晶提纯工艺;然后设计区域熔融装置,拟定操作规程和技术条件,通过用区域熔融法提纯重结晶后的防老剂d和bht产品满足标准物质的纯度要求。
区域: area; beat; reach; domain; p ...熔融: melt; melt-out; diatexis; si ...区域熔融法: zone melting method; zone melting process; zonemeltingmethod六次区域熔融: six zone pass区域熔融结晶: zone melting crystallization区域熔融提纯: zone melting purification区域精炼法 区域熔化 区域熔融: zonemelting区域熔融法成长: zone melting growth无坩埚区域熔融: zone melting without crucible区域熔化: zone melting区域熔化法: zone melting区域熔炼: zonal melting; zone melting; zone refining; zoning区域熔炼法: zero recrystallization process; zone melting process区域熔炼炉: zone furnace区域熔炼器: zone refiner磁悬区域熔炼: magnetic suspension zone-melting电弧区域熔炼: arc zone-melting腐区域熔炼法: floating zone melting method固相区域熔炼: solid phase zone melting; solid-phase zone melting激光区域熔化: zone melting with laser简单区域熔炼: simple zone melting笼式区域熔化: cage zone melting区域熔化技术: zone-melting technique区域熔化结晶: zone melting crystallization区域熔炼提纯: zone melting purification