ADC发泡剂生产中加酸工艺的改进

介绍了中平能化集团开封东大化工有限公司ADC发泡剂生产中氯化洗水循环利用的试验情况,用氯化洗水与浓硫酸混合后与水合肼反应生成联二脲,解决了加入浓硫酸瞬时肼尿液局部分解的问题,采用n（浓硫酸）：n（氯化洗水）=1：2的配比可使联二脲收率达到94．70％。     

硫酸法生产白炭黑的技术改造

硫酸法生产白炭黑存在设备利用率低、白炭黑的粒度较粗等问题 ,使产品质量难以保证。本文介绍了硫酸法生产白炭黑的生产线改造成采用酸溶胶法生产线的方案 ,改造后产品质量明显提高 ,产量增产 2 5 % ,设备单产、劳动生产率等均有提高     

PA6生产中热水制备装置的改进

对PA6生产中热水制备装置进行设计改进,改进后流程简洁,节省了设备投资和安装投资,热损失减少,节省了运行费用。     

PVC生产过程优化控制系统工程

介绍了以计算机、DCS为核心设备,以网络为信息平台,把PVC生产过程中工业优化过程控制和优化生产管理结合,构建PVC生产过程优化控制系统工程的情况。     

连续化回收黄磷尾气副产甲酸的新系统研究

针对现有黄磷尾气回收利用技术的不足,开发了将黄磷尾气资源化回收与甲酸生产相结合的新型连续化工艺,该工艺以甲酸钠磷酸酸化法为核心,充分考虑了物系的高粘变粘特性和系统用能的合理性,能生产高品质低成本的甲酸产品。同时开发了多级酸化反应器,它采用反应、加热、冷凝回流于一体的集成式结构,分室操作且配置了与介质粘度相匹配的不同类型的搅拌器,具有结构紧凑、节能高效、适应面广的特点。     

基于环境友好的盐酸生产吸收系统研究

针对盐酸生产中吸收系统设置不合理造成环境污染这一技术问题,通过分析工艺及设备结构特点.提出设计方法、数学模型和实验方案,基于环境友好对5种典型吸收系统进行研究.结果表明:二级降膜+尾气吸收系统和二级降膜+尾气吸收塔+水喷射泵吸收系统可满足氯化氢气体的排放标准,综合考虑以二级降膜+尾气吸收系统为最佳,比后者每年可节约生产...     

氯碱系统酸性气体吸收工艺的改进

介绍了氯碱系统在处理精细化工产品生产过程中排放的酸性混合气体的经济实用方法,阐述了由喷射器真空吸收改为填料塔吸收的改进过程。     

Synthesis, photo curing and viscoelastic properties of triacrylate compositions based on ricinoleic acid amide derived from castor oil

A novel trifunctional acrylate (CODTA) was obtained by the chemical modification of castor oil. Photo-polymerization of CODTA with varying amount of trimethylol propane triacrylate (TMPTA) or tripropylene glycol diacrylate (TPGDA) was carried out in presence of photo initiators to yield crosslinked networks. UV curing studies of all the compositions were done with photo-DSC equipment. Higher polymerization rates were observed for the copolymer compositions containing either TPGDA or TMPTA in place of pure CODTA monomer. Conversions were calculated from the heat liberated under isothermal conditions. Conversions improved with diacrylate (TPGDA) dilution whereas lower values were obtained with triacrylate (TMPTA) addition compared to pure CODTA. The pure CODTA films depicted fairly good storage modulus (6.3 × 10⁸ Pa) and a glass transition temperature of 91 °C in the DMTA studies. Improvement in storage modulus was observed for copolymer compositions containing 10% of either TPGDA or TMPTA. Slight improvement in T_g values was observed with TPGDA dilution, whereas reduction in values was obtained with TMPTA dilution compared to CODTA. All the copolymer films exhibited β-transitions in the loss modulus plots which may be due to rotation of alkyl side groups attached to the polymer chains. The molecular weight between the cross links (M_c) of the network chains was found to depend to a great extent on the nature and content of the co monomer. Addition of TPGDA enhanced the M_c values whereas the reverse was observed with increasing TMPTA content.     

基于MPC控制技术优化VPSA制氧工艺的模拟

针对真空变压吸附制氧在gPROMS软件中建立了严格的数学模型,基于LiLSX吸附剂设计了两塔八步的真空变压吸附流程生产纯度为92%的O ₂。对此流程进行优化,其纯度和回收率有了明显的改进。在此基础上,引入实际生产中经常存在的如进料流量的变化以及吸附性能降低等扰动因素,使模拟工作更接近实际。根据产品气中O ₂纯度的反馈,采用模型辨识技术设计了MPC控制器,用于预测控制VPSA过程的动态行为。开环和闭环控制结果的对比显示,流程在设计的MPC控制下展现出更好的结果,这表明MPC控制策略可以明显改善空气分离制氧的生产过程。     

基于有序多孔材料磷酸盐吸附剂的研究进展

过量的磷流入水体易导致水体富营养化等环境问题,吸附法由于操作方便、经济高效等特点被广泛应用于水体磷酸盐的去除。有序多孔材料具有孔道规则,比表面积大,孔容大等特点,其作为载体可有效提高活性物种的分散性,从而提高吸附剂吸附磷酸盐的效率。综述了基于不同有序多孔材料的吸附剂应用于水体磷酸盐去除的进展,主要包括有序多孔碳材料、有序多孔硅材料和金属有机框架。讨论了基于有序多孔材料吸附剂的磷酸盐吸附性能、主要吸附机理、影响因素及回收利用。总结了基于有序多孔材料吸附剂吸附磷酸盐存在的问题,展望了其未来研究方向及应用前景。     

基于有序多孔材料磷酸盐吸附剂的研究进展

过量的磷流入水体易导致水体富营养化等环境问题。吸附法由于操作方便、经济高效等特点被广泛应用于水体磷酸盐的去除。有序多孔材料具有孔道规则，比表面积大，孔容大等特点，其作为载体可有效提高活性物种的分散性，从而提高吸附剂去除磷酸盐的效率。该文综述了基于不同有序多孔材料合成的吸附剂应用于水体磷酸盐去除的进展，主要包括有序多孔碳材料、有序多孔硅材料和金属有机框架。讨论了基于有序多孔材料吸附剂的磷酸盐吸附性能、主要吸附机制、影响因素及回收利用等。总结了基于有序多孔材料吸附剂吸附磷酸盐存在的问题，展望了其未来研究方向及应用前景。     

Design parameters of boric acid production process from colemanite ore in the presence of propionic acid

In this study, three different boric acid production process alternatives which can be performed in the presence of propionic acid and/or calcium propionate were evaluated. The process in which calcium propionate is the recycling component was selected as the best alternative and modeled. Some of the design parameters were determined for the selected process. These parameters are solubility change of boric acid in the presence of calcium propionate at 25 °C, 35 °C and 75 °C, precipitation risk of calcium borate components in concentrated boric acid solutions containing calcium propionate, and the effect of calcium propionate on the solution pH with respect to free sulfuric acid concentration. According to the determined parameters, principal reactions occurred in the process, and other process parameters obtained by industrial practice, mass balances were conducted and all flow rates were calculated. In the process, calcium propionate concentration in production liquor must be kept lower than 3% and the reaction must be carried out without any free sulfuric acid in order to perform the process according to the model.     

三氯异氰尿酸生产中影响酸度计在线自控系统的原因分析

介绍了三氯异氰尿酸生产中ｐＨ值计自控系统的测量原理、组成、探头的制作过程及特点和影响因素。     

对氨基苯甲酸生产废水的树脂吸附预处理

采用超高交联吸附树脂处理芳香两性化合物对氨基苯甲酸(PABA)生产废水,通过静态吸附、动态吸附-脱附实验,研究确定了最佳的吸附-脱附工艺条件。结果表明,在常温和2 BV/h的吸附流量条件下,原废水不用调节pH值,直接经JX-101树脂吸附处理20 BV后,CODC r可从6 000 mg/L左右降至700 mg/L左右,CODC r去除率达88%以上,PABA的吸附去除率达99%以上。采用1 BV 8%氨水溶液 1 BV 4%氨水溶液 2 BV水作脱附剂,在313 K脱附温度和1 BV/h脱附流量的条件下,树脂脱附性能良好。该工艺简单,运行稳定,操作简便,可回收有用物质,有望实现工业化。     

废啤酒酵母同步吸附水中Pb2+、Zn2+、Cd2+的研究

利用废啤酒酵母同步吸附处理含Pb2+、Zn2+、Cd2+废水,考察了初始pH、反应时间和初始浓度等因素对去除率的影响,并对吸附动力学进行探讨.结果表明:废啤酒酵母对Pb2+、Zn2+、Cd2+同步吸附去除率大小依次为Pb2+＞Cd2+＞Zn2+;三者之间存在竞争吸附;拟二级动力学方程相关系数R2＞0.99,对Pb2+和在低浓度条件下拟合情况更好,内扩散和液膜扩散联合控制吸附速率.     

非连续性冶炼烟气制酸系统的设计及运行实践

介绍了集氧化、还原、烟化过程为一体的现代奥斯麦特铅冶炼炉烟气制酸系统的设计与运行实践。针对烟气流量和浓度不连续的特点,从净化系统出口分流出一部分烟气送到Cansolv系统,用胺液吸收其中的SO₂;然后根据干燥塔进口烟气的SO₂浓度将胺液再生解吸出的SO₂补充到烟气中,形成流量和浓度较为稳定的烟气,送入硫酸装置生产硫酸。硫酸装置采用一转一吸工艺,尾气用贫胺液吸收至ρ（SO₂）400 mg/m³以下排放。该装置的设计关键是净化出口的分流比例和胺液的缓冲能力。     

Impurity control in the production of boric acid from colemanite in the presence of propionic acid

The most important problem in boric acid production from colemanite ores with H₂SO₄ is the formation of MgSO₄ impurity due to the partial decomposition of clay minerals in the reaction media. Increase of MgSO₄ concentration in solution may be balanced by the discharge of mother liquor which leads to decrease the efficiency of the process. Therefore, the intake rate of MgSO₄ should be lowered for obtaining high purity product in a high yield process. In order to control the intake rate of MgSO₄ impurity, propionic acid, which does not decompose the clay minerals, is used in an acid mixture with H₂SO₄. Batch wise laboratory experiments showed that the higher the propionic acid in reacting acid mixture, the lower the magnesium intake rate. When 10% of required H₂SO₄ replaced by propionic acid, magnesium intake concentration decreased to approximately half of the value obtained in the reaction with H₂SO₄.     

氯乙烯生产控制系统的改造

介绍了横河公司的分布式控制系统CS3000在氯乙烯生产过程中的应用情况,阐述了该系统的工艺流程、硬件配置、软件配置和主要功能。     

三氯乙酸生产工艺的研究和工业化生产

在催化剂作用下,对氯乙酸生产过程中产生的母液进行通氯氯化,生产出了三氯乙酸。