静态混合器在丁辛醇缩合废水处理中的应用研究

静态混合器是高效的化工单元设备.静态混合器用于液/液萃取体系时,分散相形成的液滴大小比较均匀,这个特点不但有利于用作萃取器时提高萃取效率,而且也有利于萃取后两相的重新分离.作者通过间歇及连续的实验室探索实验,确定了采用静态混合器萃取处理丁辛醇缩合废水的可行性,提出了静态混合器萃取处理丁辛醇缩合废水的操作参数：采用SK型静态混合器,流速0.8 m/s以上,L/D≥7～10,V（油）∶V（水）=1.7∶1～3∶1.为下一步工程放大奠定了基础.     

微型离心萃取器在萃取工艺实验研究中的应用

微型离心萃取器是一种新型高效液-液萃取实验设备,具有许多显著优点。介绍了微型离心萃取器的基本结构、工作过程及其在一些萃取新工艺实验研究中的应用。     

规整填料塔萃取回收母液中咖啡因的应用研究

为降低生产能耗和便于生产操作,采用规整填料塔对某咖啡因生产企业萃取工序进行设备改造,其中氯仿为连续相。中试试验中,在相同工况条件下,对往复筛板萃取塔和规整填料塔的处理能力进行了比较,系统地考察了填料萃取塔(塔径600 mm,填料实际有效高度7 m)对不同质量分数、不同类型的咖啡因母液的处理能力和最佳流比。中试结果表明,规整填料萃取塔的处理能力比往复筛板萃取塔大,萃取塔在S/F为0.8,甲化母液最大处理量为5 m3/h,咖啡因的萃取率为99.8%,残液中咖啡因质量分数和氯仿残留满足工业生产的要求。     

技术服务

静态混合器系列产品静态混合器是一种新型的单元设备。它适用于混合,乳化和溶解过程。凡是传统上使用搅拌器和均质器的地方,原则上都可用静态混合器来代替。静态混合的特殊作用使表面更新加剧,适用于吸收和解吸过程、液-液萃取过程,以及气液、液液反应等过程相界面接触和强化作用。静态混合器可取代传统的混合、沉清器,用于萃取具有广阔的前景。静态混合器可用作气液反应器、制成高效管道反应器、可使管道长度大大缩短。用于中     

乱堆和整堆填料萃取塔设计的新方法

一、引言 液液萃取是医药和化工生产中一个重要的单元操作,根据不同的生产要求和处理物料的特性,近年来,国内外开发和使用了许多新型的萃取设备。若装有波纹板的澄清器和具有快速兼慢速传质过程的离心萃取器等。文献还介绍了Lugrgi多盘澄清器、IMI型混合澄清器、Denver型混合澄清器、Holmes低型澄清器、Ke(?)ics静态混合器以及Karr往复板柱、Graesser萃取器等设备。Mersmann和Bender等人对Karr型萃取器、ARD(不对称转盘塔)和RDC(转盘萃取塔)亦做了较详尽地报导。     

逐级式萃取设备的发展及其经济效益

探讨用逐级式萃取设备混合澄清槽和圆筒式离心萃取器替代传统萃取设备--分液漏斗、反应釜、萃取塔的可能性.     

圆筒式离心萃取器性能研究

以煤油—水—丁酸为体系,通过实验,研究了HL—20型离心萃取器的水力学及传质性能。一、概述圆筒式离心萃取器是60年代后期发展起来的一种离心萃取设备,与其它离心萃取器相比,圆筒式离心萃取器有其自己的特点,即结构简单,适应性强。在离心萃取器的加工中,技术要求最严格的是转鼓。不同规格的转鼓,生产能力可以从每小时几升到100m3/h,且其转鼓是上悬的,浸在液体部分的转动件没有密封的问题,消除了液体的漏液。在圆筒式离心萃取器中由于     

φ230环隙式离心萃取器的流体力学性能研究

研制了一种φ230环隙式离心萃取器。在1500和2090rpm两种转速下,用水-煤油和食盐水-煤油两种体系做了流体力学性能实验。 实验表明设备的机械性能和水力学性能都很好。这种萃取器可以单级或多级串联用于液-液萃取的工业生产。     

正丁基硫代磷酰三胺的连续萃取工艺研究

采用单级D20环隙式离心萃取器,用水做萃取剂,对正丁基硫代磷酰三胺合成过程中的胺化液进行连续萃取实验。流速比(反应液:水)1～7:1,总流量50～110mL/min萃取器转速1500～5000r/min,环隙为5.5mm;调整条件后,盐的单级萃取率高达97%。     

反胶团萃取蛋白质设备

综述了反胶团萃取蛋白质设备的研究进展.按设备形式和操作方式的不同将反胶团萃取设备分为膜萃取器、离心萃取器、混合澄清槽和微分萃取器,指出了各自的优缺点,强调了萃取设备的基础研究和开发新型反胶团萃取设备的必要性.     

乙烯酮(双乙烯酮)下游产品废水的治理技术

乙烯酮(双乙烯酮)是十分重要的化工中间体,其下游产品较多。江苏某化工厂开发生产乙烯酮(双乙烯酮)下游产品三十多个,年生产规模三万多吨,是国内以乙烯酮(双乙烯酮)为中间体生产精细化学品的综合骨干企业。针对乙烯酮(双乙烯酮)下游产品废水特点,该厂结合企业实际,开展了产品优化,结构调整,清洁生产,资源循环利用,节水降耗等工作,从源头削减了污染物的生产。同时投资二千多万元新建预处理装置三套,6000m3/d废水生化处理装置一套,使全厂乙烯酮(双乙烯酮)下游产品的废水得到了有效的治理。     

几种乙炔加压设备性能的比较

阐述并比较了几种加压设备在乙炔加压清净过程中的性能和特点。     

三种煤样燃烧热的测定

本文通过三个厂家提供的三种煤样燃烧热的测定,由测定结果综合得出3号煤样燃烧最完全、燃烧热也最大,是三个煤样中最好的一种。     

Semi-empirical equation of state of metals. Equation of state of aluminum

A semi-empirical equation of state for metals is described. Its capabilities are demonstrated by the example of the equation of state for aluminum. New experimental data are presented on the location of the isentrope of aluminum for unloading from the state at p = 229.71 GPa on the shock adiabat to an aerogel (SiO₂) of density 0.08 g/cm³. __________ Translated from Fizika Goreniya i Vzryva, Vol. 44, No. 2, pp. 61–75, March–April, 2008.     

小议汽车涂装工艺设计对涂装成本的影响

论述了涂装工艺设计对涂装设备投资、涂装生产成本的影响。     

水泥水化热测定方法综述

水泥水化热是中、低热水泥和核电工程用水泥的一项关键的技术指标。全球范围内测定水泥水化热的方法有溶解法、直接法/半绝热法、等温传导量热法三种。本文总结了中、美、欧相关方法标准,对其测试原理、仪器设备、试验过程等方面进行了比对,并对其在领域的应用做了简单的概括。     

Measurement of the gradient of viscosity with composition of mixtures of non-ideal gases

A perturbation viscometer is a differential capillary viscometer that measures the logarithmic viscosity gradient of the viscosity-composition curve for gas mixtures. Measurements are made at different gas mixture compositions. Integration of the logarithmic viscosity gradients measured over the full composition range gives the mixture viscosity relative to the viscosity of one of the pure components of the gas mixture. This method is attractive because, for measurements of equal precision, integration of the gradients is potentially an order of magnitude more precise than measurement of the viscosities directly. It can also work at high and low temperatures and perhaps high pressures.The perturbation viscometer has been used to make measurements on ideal gas mixtures at ambient and elevated temperatures. The situation is more complicated when the gas mixtures are non-ideal. Extra effects due to density differences, molar volume change on mixing and differential thermal expansion may be measured in addition to the desired viscosity change producing systematic errors in the results. Thus, a more sophisticated apparatus is required. The standard perturbation viscometer has been modified to separate out the extra effects to permit measurement of the true change in viscosity. In addition, the theoretical operation of the modified apparatus has been revised to account for the design changes to permit calculation of the viscosity-composition profiles from the results.The apparatus has been tested using helium-HFC-125 mixtures and two new viscosity-composition profiles are presented for these mixtures at 23 and . Internal consistency tests have been used to confirm that the data produced are of high quality with an estimated uncertainty in the viscosity ratio data at of 0.9% and at of 1.5%.     

Calorimetric and Computational Study of Enthalpy of Formation of Diperoxide of Cyclohexanone

A thermochemical rather simple experimental technique is applied to determine the enthalpy of formation of Diperoxide of ciclohexanone. The study is complemented with suitable theoretical calculations at the semiempirical and ab initio levels. A particular satisfactory agreement between both ways is found for the ab initio calculation at the 6–311G basis This set level. Some possible extensions of the present procedure are pointed out.     

塔设备改造选型的分析

就当前扩产增容中塔设备设计和改造时板式塔和填料塔的选型问题加以分析。在评述目前国内常用的几种塔板和新型填料之后，着重介绍一种新型塔板（导向梯形浮阀塔板）和一种新型填料（波环填料——乾隆帕克）。     

Effect of degree of deacetylation of chitin on the properties of chitin crystallites

In the present article, chitin from crab shell was systematically deacetylated using a NaOH treatment with control of the reaction time. The degree of deacetylation, monitored using solid-state NMR, revealed that the reaction was pseudo-first order. Based on this, swollen and NaOH-saturated particles are proposed as the reaction system. The weight loss of the partially saponified and neutralized samples after HCl hydrolysis increased linearly with the degree of deacetylation. The crystallinity of the samples was found to increase after acid hydrolysis. According to conductimetric titration, the surface charge density of the crystallites, after acid hydrolysis, was found to increase with base treatment time. The effect of surface charge on the formation of a chiral nematic phase, due to the rodlike nature of the crystallites, was explored. These results show that because the contribution of charged particles to the ionic strength was significant the double layer compression was affected, especially since the surface charge density was close to the Manning limit. © 1997 John Wiley & Sons, Inc. J Appl Polym Sci 65:373–380, 1997