从洗油中分离精制β甲基萘

综述了β-甲基萘分离方法及其研究进展,并就当前工业生产技术中存在的问题,提出了采用连续法减压精密精馏的新工艺。选择合适的汽液平衡模型,利用PRO/Ⅱ软件对新工艺进行模拟计算,计算结果表明这种新工艺具有显著优越性。新工艺对从洗油中分离精制β甲基萘具有显著的工业意义。     

从煤焦油回收洗油中提取联苯的研究

从煤焦油回收洗油中利用减压精馏、二次结晶的工艺路线,先减压精馏去除部分β-甲基萘和α-甲基萘等前馏分,获得纯度为70%左右的富集联苯馏分,进一步结晶去除二甲基萘和吲哚等杂质获得高纯度的联苯产品.研究结果表明在不影响公司物料平衡的基础上可获得99%联苯,并具有较高的产品回收率.该工艺路线,不但回收了宝贵联苯资源,使企业效益最大化,而且使洗苯能力强的有效组分甲基萘等得以浓缩,提高了洗苯洗油的质量,有利于洗苯工序生产.     

重苯精馏工艺技术的开发与应用

由于重苯中成分复杂,分离提取较为困难,国内大多数厂家只进行初加工。潍焦集团利用重苯中各组分的熔沸点性质不同,应用精馏技术开发出一种重苯加工装置,分离出溶剂油、工业萘、α-甲基萘、β-甲基萘以及洗油等质量稳定的产品,实现了较好的经济效益。     

分离β甲基萘的新方法

苏联某焦化厂提出用甲基萘馏分的熔融物与液体冷却剂直接接触进行连续分级结晶,以分离出β甲基萘。试验中采用连续对流结晶塔,用含60～86％β甲基萘的甲基萘馏分作原料,用23％氯化钠的水溶液作冷却剂。研究了在结晶塔中结晶的形成过程。塔下部的分散相主要由熔融液滴组成。随熔融液滴上升其温度降低,开始形成结晶相,部分液滴凝结形成结晶     

GB/T6699焦化萘国家标准述评

介绍了原ＧＢ６６９９与ＧＢ６７００合并为新标准ＧＢ／Ｔ６６９９焦化萘的起草过程,分析了我国不同时期萘标准技术条件,重点介绍了焦化萘标准中几项技术指标修订情况,并对各国标准进行对比。     

用接触结晶法分离β甲基萘

用甲基萘馏分的熔融物与液体冷却剂直接接触进行连续分级结晶,以分离出β甲基萘。试验中采用了用连续对流结晶塔,用含60～86%β甲基萘的甲级萘馏分作原料,用23%氯化钠的水溶液作冷却剂。研究了在结晶塔中结晶的形成过程,塔下部的分散相主要由熔融液滴组成。随着熔融液滴上升其温度降低,开始形成结晶相,部分液滴凝结形成结晶混合物,进一步冷却时,结晶混合物的数量增加,颗粒变     

从工业甲基萘馏分中分离、提纯α－甲基萘和β－甲基萘的研究

叙述了两种从工业甲基萘馏分中分离和提纯α－甲基萘和β－甲基萘的方法，即蒸馏、洗涤、蒸馏法和去杂质、蒸馏、结晶法。与原工艺的主要不同之处是；预先除去了影响产品富集的主要杂质，使产品的收得率和纯度都较原工艺方法有不同程度的提高，是目前我国一些工厂提取该两种产品的较好的替代工艺。     

云南厚壳桂叶脂溶性成分分析

[目的]分析云南厚壳桂叶脂溶性化学成分,为合理利用云南厚壳桂资源提供科学依据.[方法]用GC-MS分析云南厚壳桂叶脂溶性成分.[结果]鉴定出54种化合物,占挥发油总量的89.47%.主要成分为δ-杜松烯(20.55%)、β-古芸烯(16.66%)、匙叶桉油烯醇(8.09%)、α-可巴烯(3.16%)、1,2,3,4,6,8α-六氢-1-异丙基-4,7-二甲基萘(2.36%)和杜松-1,3,5-三烯(2.33%)等.[结论] 云南厚壳桂叶脂溶性化学成分主要为倍半萜类、芳香族和烷烃类物质,该研究为合理利用云南厚壳桂叶提供了科学依据.     

环境中羰基化合物分析方法研究进展

作为环境中重要的挥发性有机污染物,羰基化合物受到了广泛的关注,多种分析技术被应用于其相关环境样品的监测.笔者从羰基化合物的前处理技术研究和仪器分析进展两个方面,概述了近年来国内外的相关研究成果.从研究前景来看,高灵敏、高选择性的液相双质谱结合特殊衍生试剂分析空气、水、食品及植物中的痕量高分子量羰基化合物前景较好,而一些新型羰基化合物前处理技术的研制方面也有较大的研究空间.     

焦化废水处理技术现状与研究进展

焦化废水是煤制焦化产品回收过程中产生的废水,是一种含氨氮和有机物浓度较高的难生化降解的有机废水.焦化废水的污染控制一直是国内外工业废水污染控制的重大难题,文章分析焦化废水治理的现状,介绍了传统常用的和当前先进有效的几种焦化废水处理技术,并详细叙述了各种技术的原理和处理效果,比较了各种处理方法的优劣,并对焦化废水处理的前景进行了展望.     

Acceleration of Electricity Reform Brings Benefit to Big Electricity Users,Aluminum Manufacturers Can Save Costs Up to Several Hundred Million

<正>Recently the National Commission of Development and Reform again assembled experts to solicit opinions,and discussed new electricity reform program.According to information disclosed by experts attending the meeting,in the future electricity reform will undergo top-down design,possibly a     

Qinghai's Aluminum Processing Capacity to Rise at the End of the Year

正Since the release of Implementation Opinions on Carrying out‘Guiding Opinions of the State Council on Resolving Serious Production Overcapacity Conflicts’,according to the actual situation of industry,Qinghai has focused on electrolytic aluminum,cement,ironsteel(including iron alloy and silicon carbide),     

Recent Trends in China's Copper Scrap Market-Part Ⅱ

<正>2.Tianjin Scrap Metal Market In Tianjin,we mainly visited Jinghai Ziy Town scrap market and Binhai New Area’some copper scrap enterprises and enterprise using copper scrap.In Ziya we felt the coppe scrap market was particularly deserted,mos copper scrap enterprises in the town wer closed,industry insiders said in 2012 the plac here was bustling with activity.According to     

Shanghai Clearing House to Roll out Renminbi-denominated Copper Clearing Operations in Free Trade Zone

正Clearing House Financial Markets Co.,Ltd.(Shanghai Clearing House)General Manager Xie Zhong told the media recently at the briefing of the international symposium of"Reform Deepening and Mechanism Innovation of the Post-crisis Kerb Market",Shanghai Clearing House will explore the feasibility of carrying out bond business in     

Development and Application of New Materials for Copper Processing in China

正After over 60 years of developmnt,a system for RD and production of copper processing materials has already taken shape in China.After the reform and opening-up,the application of copper processing materials has gradually expanded from the military industry to civil field.The annual output of copper     

China’s Mineral Exploration Market Downturn Causes Decline of Investment in Bauxite

<正>According to a survey report conducted recently by China Geological Survey Development Research Center,in the first half of 2014,China’s mineral exploration market continued to decline,with the investment in exploration of non-fuel minerals dropping by13.7%and drilling workload dropping by21.7%.According to statistical analysis of the Center,     

Fabricated Copper Production by Province or City in 2014

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Zinc Production by Province in 2014

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China's Aluminum Alloy Cable Market has Taken Shape

正Aluminum alloy cable is a mature product and technology that has been used for nearly fifty years in the U.S.Through six years’promotion,it has been widely recognized and accepted in the China market since 2013,which laid the foundation for the development of the aluminum alloy cable market.Aluminum alloy cable is widely applied in the fields of civil construction and industrial and mining enterprises,especially in real estate,steel and metallurgy.     

Qinghai to Build a 100 Billion Yuan Lithium Industry Base

正At 2014 China Qinghai Trade Fair for Green Development Investment,Qinghai EV Rally2014 was introduced for the first time.With electrical vehicles’eco-friendly features,Qinghai manifested its determination on green development.Introducing Qinghai EV Rally was just a signal.By leveraging its rich salt lake resources