共查询到20条相似文献,搜索用时 203 毫秒
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《丙烯酸化工与应用》2006,19(2):48
中国石油吉林石化分公司电石厂建成于1955年。占地面积118公顷,固定资产原值13.11亿元。工厂分为焦化、氯碱、有机、精细化工四大生产系统。拥有焦化、乙醛、醋酸、醋酐、电解、氯磺化聚乙烯、有机硅、丙烯酸及酯、醇醚、AES等13套装置,生产冶金焦、乙醛、醋酸、醋酐、DMC(有机硅)、AES、醇醚、丙烯酸、丙烯酸甲/乙仃酯等29种主要产品。 相似文献
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《化工中间体》2007,(9):53-53
氯乙酸钠,分子式CH2C1C00Na,分子量116.48。性状:白色结晶粉末。溶于水,溶于甲醇,不溶于丙酮、苯醚和四氯化碳,干燥的氯乙酸钠相当稳定,在湿空气中易潮解。规格:一级品含量≥98.0%二级品含量≥96.0%。用途:氯乙酸钠是一种重要的精细化工产品,广泛用于石油化工、有机化工、合成制药、农药、染料用化工,金属加工等工业生产。合成制药:氨基酸、镇静药合成、维生素、。肾上腺素、H1受体拮护剂等。有机化工:粘合剂、巯基乙酸合成。染料:印染助剂、中性艳兰。日用化工:羧甲基纤维素、羧甲基淀粉、化妆品添加剂、表面活性剂、洗发香波浴液等。金属加工:防锈、清洗电镀。包装:25公斤袋装。 相似文献
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膨胀石墨与活性炭对工业油吸附性的对比研究 总被引:4,自引:0,他引:4
选用膨胀体积为150、250、350 mL/g的膨胀石墨和活性炭为吸附剂,以汽油、煤油、柴油、真空泵油和汽机油为吸附质,采用重量法测定了吸附剂对吸附质的吸附性能,实验结果表明:膨胀体积为350 mL/g的膨胀石墨对吸附质的吸附量分别为40、47、52、64、70 g,活性炭的吸附量分别为3.02、3.04、3.08、3.1、3.4 g;膨胀石墨的滞留吸附量分别减少至8、10、17、24、30 g,活性炭的滞留吸附量变化不大.对比了不同膨胀体积的膨胀石墨和活性炭对吸附质的吸附性能,膨胀体积越大,吸附量越大.用SEM和TEM对膨胀石墨的形貌进行了表征,探讨了吸附和滞留吸附的机理. 相似文献
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采用RKS-BM物性方法,以Aspen Plus工程软件对马来酸二甲酯催化加氢生产1,4-丁二醇、四氢呋喃和γ-丁内酯等产品的精馏分离过程进行模拟计算.结果表明,精馏操作工况与工业化装置吻合,产品中1,4-丁二醇、四氢呋喃、γ-丁内酯的质量分数分别达到9.5%、99.99%、99.56%,1,4-丁二醇的回收率≥99.... 相似文献
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The effects of the operating pressure, cross flow velocity, feed concentration, and temperature on the streaming and Zeta potential of the membranes were studied. The permeate flux and the retention rate under different nanofiltration operating conditions were also investigated. The results show that the higher pressure, feed concentration, temperature, and lower cross flow velocity lead to the higher absolute value of streaming and Zeta potential. The permeate flux of the nanofiltration decreases with the feed concentration and increases with not only the pressure but also the cross flow velocity and temperature. The higher the pressure and the cross flow velocity, the higher the retention rate. The lower feed concentration and higher temperature leads to lower retention rate. The effects of the operating conditions on the permeate flux and the retention rate were explained by the variation of the membrane charge property. 相似文献
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Immobilization of Candida rugosa lipase onto modified and unmodified bentonites is described. The effect of hydrophilic or hydrophobic nature of the support, the reuse efficiency, and kinetic behavior of immobilized lipase were studied. The modified bentonite with monolayer surfactant (BMS), was the best support, for immobilization. The activity of the immobilized enzyme was examined under varying experimental conditions. The effect of various factors such as concentration of enzyme solution, pH and temperature, stirring and various thermodynamic parameters were also evaluated. The activity of lipase on Na-bentonite, on BMS and on bentonite with bilayer surfactant (BBS) at the optimum pH was 7.2%, 56.6% and 3.6%, respectively. The adsorption isotherm was modelled by the Langmuir equation. The amounts of immobilized lipase on Na-bentonite, BMS and BBS at the highest activity were 42.6%, 61.2% and 28.3%, respectively. The effect of substrate concentration on enzymatic activity of the free and immobilized enzymes showed a good fit to the Michaelis–Menten plots. The immobilized enzyme exhibited an activity comparable to the free enzyme after storage at 30 °C. The thermal stability of free and immobilized lipase were also studied. 相似文献
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采用分子动力学方法研究纳米尺度下液氩在过热基板上的沸腾过程。通过调节固液间相互作用的方式改变壁面润湿性,模拟并分析了壁面润湿性对沸腾过程中能量传递和液体运动情况的影响。结果表明:不同润湿性表面均会发生固液分离的现象,但是固体表面附近吸附的氩原子数密度随润湿性增强而增大;润湿性较强时,液体的能量上升快,热通量高,液体内部温度梯度大,发生固液分离时间早,系统中氩的温度和能量低,上升过程中液氩密度、厚度变化小;润湿性较弱时,液体的能量上升慢,热通量小,液体内部温度梯度小,发生固液分离时间延后,系统中氩的温度、能量更高,上升过程中液氩密度、厚度变化较大。下部气体压力整体上大于上部气体压力,发生固液分离时润湿性越强的表面上液体上下压差越大,首次上升过程能达到的高度越高,所需时间越短。 相似文献
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Zhenming Zhang He Zhao Xiaohui Wang Weiming Ni Fengsheng Gao Jianrong Wang Minjin Liu Yongli Li 《中国化学工程学报》2021,33(5):112-117
The microreactor based hydroxylation process of 1,2,4-trichlorobezene for producing 2,5-dichlorphenol, the key intermediate of dicamba, is energy efficient and cost effective. But the 2,5-dicholorphneol is pre-sent in a mixed state after production. The reaction mixture contained the main by-product 2,4-dichlorophneol, low-content by-product 3,4-dichlorophneol, and other impurities. The difficulty in sep-aration and analysis limits the application of this process widely. The current work aimed at establishing effective analysis methods by gas chromatography (GC) and high performance liquid chromatography (HPLC). The GC method was not able to separate 2,5-dichlorophenol and 2,4-dichlorophenol completely, but the developed HPLC method worked efficiently. The linear correlation coefficients of 2,5-dichlorophenol and 2,4-dichlorophenol were both higher than 0.999, and the average recovery was 100.33% for 2,5-dichlorophenol and 100.13% for 2,4-dichlorophenol, respectively. The relative standard deviations from precision tests were both less than 1%. The contents of 2,5-dichlorophenol and 2,4-dichlorophenol were determined with external standard method. The HPLC method has the advantages of simple operation, good separation efficiency, high accuracy and precision, and was successfully applied for both qualitative and quantitative analysis of 2,5-dichlorophenol and 2,4-dichlorophenol of the sample solution. 相似文献
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采用实验观测与图像处理相结合,对CCl4液滴在水下撞击凹壁面后的动态特性进行了系统研究。结果表明,液滴撞击凹壁面的过程经历了下降、扩散、松弛、滚动和润湿五个阶段。液滴与凹壁面间的撞击角θ对液滴拉伸特性的影响大于液滴初始直径和壁面曲率半径。当θ=90°时液滴垂直撞击壁面最低点,液滴迅速弹跳并强烈回缩,铺展时间短且变形率最小。在θ=100°~150°时,随着撞击角增加液滴变形幅度增大,相邻时刻滑动变形率小于滚动变形率。110°<θ<130°时液滴以滑动和铺展为主。θ>130°时液滴沿壁面滚动现象更容易发生。θ=154.2°时液滴接近纯滚动状态。增大撞击角,液滴沿凹壁面滚动下滑有效降低壁面黏附和液滴破碎。 相似文献
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碳纤维增强复合材料接头研究进展 总被引:4,自引:0,他引:4
本文综合叙述了碳纤维增强复合材料接头的设计、成型工艺、强度分析、试验方法及其研究进展,重点介绍了碳纤维增强复合材料耳片接头的尺寸设计、铺层设计和承载设计,以模压法和三维编织法为例介绍了耳片接头的工艺流程,对用于接头强度分析的有限元法、解析法及其相关的强度理论进行了叙述,探讨了复合材料接头拉伸、弯曲和剪切的试验方法,指出了接头设计和试验中存在的问题和今后的研究方向。研究表明,碳纤维增强复合材料接头一般优先选择增强型层压式结构形式,三维编织呈厚度方向增强结构以及关于接头疲劳的研究是今后研究和发展的方向。 相似文献