常温精脱硫新工艺效益显著

常温精脱硫新工艺效益显著由湖北省化学研究所开发的“Ｔ５０４型氧硫化碳水解催化剂串ＴＩ。１型活性炭精脱硫剂”（Ｔ。。。即《湖北化Ｌ）１９９３年第２期５３页上Ｔｓ。。）常温精脱硫新工艺，３年来已在全国４０多家中小联时厂推广应用．占国内使用面的７０％以上。...     

EF—2常温氧化铁精脱硫剂在我厂的应用

介绍了ＥＦ－２常温氧化铁精脱硫剂趾Ｔ５０４水解催化剂的精脱硫新工艺在ＮＣＲ－ＰＣ３系统中应用的情况。使用结果表明,精脱硫效果很好,甲醇催化剂的利用系中达粗醇４２００ｔｍ＾３,ｃａｔ,经济效益可见。     

EZX多功能转化吸收型精脱硫剂、JTL-4、JTL-5常温精脱硫新工艺和EF-2型氧化铁精脱硫剂通过鉴定

湖北省化学研究所气体净化中心是科、工、贸、技术服务一体化的经济实体 ,是国家气体净化剂重点工业基地 ,主要致力于工业和环保净化剂的研究和开发 ,继Ｔ5 0 4型常温氧硫化碳水解催化剂、Ｔ10 1、Ｔ10 2、Ｔ10 3活性炭精脱硫剂、ＪＴＬ 1常温精脱硫新工艺通过部、省联合鉴定 ,获科技进步一、二等奖后 ,近年来研究、开发的ＥＺＸ多功能转化吸收型精脱硫剂、ＪＴＬ 4、ＪＴＬ 5常温精脱硫新工艺和ＥＦ 2型氧化铁精脱硫剂又于 2 0 0 0年 9月 2 6～ 2 7日通过国家石油和化学工业局科技办和湖北省科学技术厅联合主持的专家鉴定。来自中国氮肥工…     

EZX多功能转化吸收型精脱硫剂、JTL-4、JTL-5常温精脱硫新工艺通过鉴定

湖北省化学研究所气体净化中心近年来研究、开发的ＥＺＸ多功能转化吸收型精脱硫剂、ＪＴＬ4、ＪＴＬ5常温精脱硫新工艺和ＥＦ2型氧化铁精脱硫剂于2000年9月26～27日通过国家石油和化学工业局科技办和湖北省科学技术厅联合主持的专家鉴定。ＥＺＸ多功能转化吸收型精脱硫剂解决了ＣＯＳ水解催化剂不能在露点下操作和常温下不能精脱ＣＳ2这两大技术难点,实现了在常温下对ＣＯＳ、ＣＳ2的转化与吸收,并进行了广泛的工业应用,该精脱硫剂属国际首创。由“Ｔ102串ＥＺＸ精脱硫剂”组成的ＪＴＬ4常温精脱硫新工艺实现了常温下的精脱硫,并能同时脱除…     

常温精脱硫工艺的新进展及其应用

本文叙述了由Ｔ５０４水解催化剂下串Ｔ１０１精脱硫剂（特种活性炭）与由ＥＺＸ多功能脱硫剂单独组成的常温精脱硫新工艺，新工艺可将气体中的总硫（ＣＯＳ＋Ｈ２Ｓ）脱除至〈０．０６ｐｐｍ，它们已在保护甲醇，甲烷化，氨合成催化剂，贵金属催化剂，特种吸附剂与食品ＣＯ２气体中等５０多家中，小化肥厂使用，取得了显著的效果。     

常温精脱硫工艺的新进展及其应用

主要介绍了该所开发成功的Ｔ５０４ＣＯＳ水解－Ｔ１０１活性炭常温精脱硫新工艺ＪＴＬ－１及在此基础上改进的几种工艺。ＪＴＬ－１新工艺已在３０多家厂推广应用，本文中以具体事例简介了其应用情况。     

化工信息

EH-1Q型常温氧硫化碳水解催化剂、EAC-1型活性炭精脱硫剂及常温精脱硫新工艺通过部级鉴定EH-1Q型常温氧硫化碳水解催化剂、EAC-1型活性炭精脱硫剂及常温精脱硫新工艺这一攻关课题,经     

我厂联醇原料气采用精脱硫新工艺初探

针对该厂联醇生产原料气中硫含量偏高，造成铜基催化剂活性衰退快、更换频繁的现状，提出增加精脱硫装置，对精脱硫方案进行了比较，建议采用Ｔ５０４水解催化剂串Ｔ１０１活性炭常温精脱硫工艺，可取得节省催化剂、提高甲醇产量、降低能耗等综合经济效益。     

联醇催化剂生产强度创新记录

我公司系年产合成氨 8万吨 ,联醇 1.5万吨、尿素 6万吨、碳铵 16万吨的小氮肥厂。 1996年计划上一套联醇 ,通过考察 ,发现甲醇催化剂对硫非常敏感 ,易受微量硫中毒而失活 ,因此 ,要延长甲醇催化剂的寿命 ,选择合适的常温精脱硫新工艺是至关重要的。根据 1996年全国小氮肥协会在南京会议上的推荐 ,结合我公司使用低硫煤为原料与碳丙脱碳的特点 ,我公司常温精脱硫采用湖北化学研究所开发的“ＪＴＬ - 4”新工艺 ,其工艺方块图为 :脱碳气 Ｔ10 2 　　　 ＥＺＸ(1)脱碳气气量为 2 2 0 0 0ｍ3(标 ) /ｈ ,Ｔ10 2、ＥＺＸ精脱硫剂装填量均为 18ｍ3,…     

简讯

简讯北京化工实验厂于１９９２年９月～１９９３年１０月完成了“Ｔ５０４型氧硫化碳水解催化剂与ＱＴＳ－０１型氧化锌脱硫剂常温精脱硫新工艺”工业生产试验。其工艺条件为压力２．０ＭＰａ，温度５０～８０℃；水解脱硫槽高径比为２．３３；气空速８００～１０００ｈ－...     

国内甲醇消费市场状况

我国甲醇主要用于甲醛、对苯二甲酸二甲酯、农药、甲基叔丁基醚、醋酸的生产,我国甲醇消费量增长最快的领域将是燃料甲醇、醋酸和甲醛。预计 2005年甲醛对甲醇的需求量为 175万t左右,聚甲醛对甲醇的需求量为 40万t,醋酸需求甲醇为 62万t,甲基叔丁基醚为 46万t左右,甲胺为 30万t,碳酸二甲酯为 11万t,甲烷氯化物为 10万t,甲醇燃料为 80万t,农药为 22万t,对苯二甲酸二甲酯 3 0万t,其他衍生物 27万t。     

Preconcentration of trace elements by adsorption onto a niobium wire for electrothermal atomization atomic absorption spectrometry with a tungsten tube atomizer

In the present work, a new preconcentration method of trace elements by adsorption onto a niobium wire has been developed for electrothermal atomization atomic absorption spectrometry (ETAAS) with a tungsten tube atomizer. Detection limits (pg·mL^–1) by this method combined with ETAAS were 45 for bismuth, 7.0 for cadmium, 20 for copper, 1.3 for gold, 36 for lead, 65 for manganese, 9.5 for rhodium and 19 for silver.     

少烟三元乙丙橡胶材料研制

以三元乙丙橡胶(EPDM)为基体材料，三氧化二锑、十溴苯醚为阻燃剂制备了材料配方，试验了三氧化二锑(Sb22O3)、十溴苯醚(DBDPO))配比对材料烟雾和力学性能的影响，测试了材料的氧指数，可见光的透过率，自熄性等。结果表明，DBDPO与EPDM的相容性比较好，Sb2O3的相容性则相对比较差，两者都可以提高材料的阻燃性能。以4045EPDM橡胶为基体材料，当EPDM100g，白炭黑10g，二硫化四甲基秋兰姆(TMTD)2g，ZnO5g，促进剂M1g，硬脂酸2g，硫磺3g，Sb2O3和DBDPO质量比为20．0／40．0，可以获得具有较好力学性能的少烟EPDM橡胶材料。     

光固化医用胶粘剂研究进展

介绍了目前光固化医用胶粘剂的几个应用领域,包括软组织用胶粘剂、齿科用胶粘剂、骨科用胶粘剂以及医疗器械用胶粘剂等,并对其未来发展进行了展望。     

汽车工业用粘接材料的现状与展望

本文按照汽车制造工序介绍国外汽车工业折边用胶粘剂、点焊胶接用胶粘剂、车身密封胶、车身底涂料、窗玻璃用单组份湿气固化型聚氨酯胶粘剂以及纤维增强树脂用结构胶粘剂等主要胶种的最新技术发展动向。讨论了我国汽车工业用胶粘剂的现状和差距，提出几点建议。     

Mathematical Modeling and Simulation of Drying Using Two Industrial Concurrent and Countercurrent Rotary Dryers for Ammonium Nitrate

Drying of ammonium nitrate (AN) is accomplished in the Shiraz Petrochemical Complex (SPC) using a concurrent rotary dryer following a countercurrent rotary dryer. A mathematical model for these rotary dryers including heat and mass transfer was developed. The model was checked against industrial-scale data, which showed a good agreement. The average absolute deviation of the simulation results compared to the industrial data for the concurrent dryer was 4.0% for solids moisture, 1.3% for solids temperature, and 1.8% for air temperature and for the countercurrent dryer it was 9.0% for the solids moisture, 2.0% for solids temperature, and 4.6% for air temperature. These simulation results reveal that for outlet solid moisture, inlet AN moisture, and air temperature as well as the outlet temperature of product, the inlet solid and air temperature have major effects for both concurrent and countercurrent flow.     

Analysis of Gas Centrifuge Cascade for Separation of Multicomponent Isotopes and Optimal Feed Position

Abstract

Analysis of the concentration distribution in a gas centrifuge cascade for separation of multicomponent isotope mixtures is different from that in a cascade for separation of two-component mixtures. This paper presents the governing equations for a multicomponent isotope separation cascade. Numerically predicted separation factors for the gas centrifuge cascade agree well with the experimental data. A theoretical optimal feed position is derived for a short square cascade for a two-component mixture in a close-separation case. The optimal feed position for a gas centrifuge cascade for separation of multicomponent mixture is discussed.     

Effectiveness in the Removal of Organic Compounds from Municipal Landfill Leachate in Integrated Membrane Systems: Coagulation – NF/RO

The article presents the results of studies concerning the hydraulic permeability of integrated membrane systems during the treatment of municipal landfill leachate. The laboratory-scale experiments were conducted to determine the effectiveness of coagulation as a pretreatment option for treating stabilized landfill leachate and effectiveness of nanofiltration (NF) and reverse osmosis (RO) processes. The municipal landfill leachates were analyzed for the concentration of the following: polycyclic aromatic hydrocarbons (PAHs), nitrate nitrogen, ammonium nitrogen, chemical oxygen demand (COD), total organic carbon (TOC), total carbon (TC), suspended soils (SS), turbidity, pH. The commercially available coagulant – aluminum sulfate Al₂(SO₄)₃·18H₂O (alum) was used as a coagulant. The NF process was carried out at the transmembrane pressure of 1.5 MPa. The membrane separation process was based on a thin film membrane (DK). The transmembrane pressure of the RO stood at 2 MPa and for this process one polyamide membrane (AG) was used. The level of leachate treatment was defined for raw and cleaned wastewater indicators. Both NF and RO membranes allowed obtaining the high level of pollutants removal. In the coagulation–NF system, the removal efficiency was equal to 77% for PAHs, 88% for COD, 72% for ammonium nitrogen, 80% for nitrate nitrogen, 67% for TOC, 80% for TC, 96% for SS and during the RO – 86% for PAHs, 98% for COD, 93% for ammonium nitrogen, 87% for nitrate nitrogen, 89% for TOC, 100% for TC, 98% for SS. The calculations based on the assumptions of the mathematical filtration model (relaxation) made it possible to predict the efficiency of commercial filtration membranes used for leachate treatment.     

丙型肝炎病毒核心总抗原检测试剂的评价

目的评价国外丙型肝类病毒核心抗原检测试剂盒的质量以及窗口期检测核心总抗原(HCVcAgTrak-C)的意义。方法用该试剂检测8649份自然献血员及566份HCV可疑感染者血清的核心总抗原,并与抗体试剂(Anti-HCV)、游离抗原(HCVfreeAg)试剂、核酸(HCVRNA)试剂进行比较。结果筛出核心总抗原和抗体同时阳性血清152份,抗体阴性而总抗原阳性血清5份。利用RNA试剂检测这5份血清,结果HCVRNA阳性。利用HCVfreeAg试剂检测这9215份血清,发现2份阳性,其中1份为抗原和抗体同时阳性,RIBA检测确证这份血清产生的是核心区抗体。另1份为单独抗原阳性。结论在应用HCV抗体试剂对血液进行筛查的同时使用HCVcAg试剂检测,可以减少因窗口期造成的漏检。     

木材用改性淀粉胶粘剂的研究进展

综述了木材用改性淀粉胶粘剂的研究进展,并对其今后的发展作了展望。木材用改性淀粉胶粘剂是由天然淀粉通过各种形式的变性处理,并添加一定量的助剂制备而成的,该胶粘剂克服了原淀粉胶粘剂粘接强度低、耐湿性差、初粘力小和干燥速率慢等缺点,具有环保、成本低、性能好且适合工业化生产等诸多优点。