PTA常压酯化技术及其应用

ＰＴＡ常压酯化技术及其应用童本进（扬子石油化工公司，南京２１００４８）舒新华（扬子石油化工公司研究院，南京２１００４８）ＴｏｎｇＢｅｎｊｉｎ（ＹａｎｇｚｉＰｅｔｒｏｃｈｅｍｉｃａｌＣｏｍｐａｎｙ，Ｎａｎｊｉｎｇ２１００４８）ＳｈｕＸｉｎｈｕａ（Ｒｅｓ...     

Interaction between bubbles and fibre optic probes in a bubble column

Spherical bulb fibre optic probes, developed and applied for bubble characterization in a bubble column and a slurry bubble column at high temperature, were investigated. The principle of operation of these new optical fibre probes is based on the difference in refractive indices between the gas and the liquid phases. The interaction between the gas bubbles and the fibre optic probes in a bubble column was studied using photographic techniques. The first objective of these experiments was to study the response of the sensors upon contact with gas bubbles of various sizes. The second objective of this study was to establish, under controlled situations, the optical probe bubble detection performance and ability for local quantitative measurements of the bubble rise velocity and the gas hold-up.     

Kinetics of oxygen absorption in aqueous sodium dithionite solutions

The absorption and reaction of oxygen in aqueous alkaline solutions of sodium dithionite has been experimentally investigated in a novel gas-liquid contactor. The novel gas-lift bubble column contactor was used to study the kinetics over wide ranges of reactant concentrations, temperature, and pH. The oxygen-sodium dithionite reaction was found to be first-order with respect to dithionite in the range of dithionite concentration < 0.1 M, and second-order in the range of dithionite concentration > 0.1 M. The reaction with respect to oxygen was found to be zero-order for all dithionite concentrations. These results and experimental investigations of the effect of solution alkalinity and temperature on the reaction rate are consistent with previous findings obtained in different gas-liquid contactors. The results thus confirm the feasibility of using the gas-lift bubble column for the kinetics of gas-liquid reactions.     

热镀锌渣真空蒸馏回收锌

在钢件热镀锌过程中，产出约占锌总量１０％的热镀锌渣，渣中含锌和少量铁，铅，铜，铝等杂质。用直空蒸馏方法从热镀锌渣中提取锌；具空度１．３３×１０＾２－１．３３×１０＾３Ｐａ，温度９００℃，作业时间１１ｈ／炉，电耗约２０００度／ｔ锌，试验表明，锌的直收离可达８４％，为热镀锌渣中锌的回收提供了一英经济而合理的方法。     

异丁醛氧化制丙酮热导气相色谱分析

本工作用２米４０１有机担体填充柱，在带四臂热导检测器的国产１０３型气相色谱仪上，仅８分钟将原料异丁醛、产物丙酮及水进行良好分离，并采用内标法定量，其最大平均偏差在±２％以内。方法简单、快速、准确     

Erosion-corrosion of a stainless steel distillation column in food industry

Unusual extended corrosion phenomena were detected in a distillation column made in AISI type 316 stainless steel (UNS S31600) of a plant for natural pectins extraction from citrus. The column was the first of a series of two distillation columns representing the unit core. Corrosion problems were observed only in that column and mainly along the surface of the trays located in the lower section of the column. The phenomenon was observed subsequently to a modification of the original plant layout that caused an increase of the operating temperatures and turbulence of the process stream inside the column.     

甲醇与碳酸二甲酯共沸液的分离研究进展

综述了DMC-CH_3OH二元共沸液的各种分离方法。讨论了共沸精馏和萃取精馏的工艺流程。     

萃取精馏回收环己烷的双组分溶剂的研究

在研究萃取精馏分离回收环己烷的单溶剂的基础上，研究了双组分溶剂。当剂油比为7:1时，环己醇和四甘醇双组分溶剂可以将正庚烷对环己烷的相对挥发度由单溶剂时的小于1提高到1．11；将2，3—二甲基戊烷对环己烷的相对挥发度由单溶剂时的小于1．07提高到1．21。用该溶剂在小型萃取精馏实验装置上运行，结果表明，环己烷的纯度为98．5％，收率为80％。     

第二套常减压装置低温热回收技术的应用

常减压装置低温余热较多.利用较少,造成热量损失。利用初顶油气、稳定石脑油等低温余热加热除盐水建立热水站,在节汽、节电等方面取得了较好的效果。