上海浦江分子筛厂13X分子筛应用小结

<正>上海市嘉定娄塘制氧厂,为杭氧集团成员,现有 4台150 m3/h制氧机,并有 1台新流程的1000 m3/h制氧机正在基建安装。为在我厂制氧机上进行多厂家分子筛应用比较,经慎重研究与考虑,决定与上海浦江分子筛厂进行配合与合作。上海浦江分子筛厂是上海市科委直属企业,是生产分子筛和催化剂的专业厂,其A型分子筛产品已获得上海市1993年市级新产品证书,并在石化行业中推广应用。近年来又在上海华东理工     

选择吸附用13X分子筛材料的性能评价及标准化

13X分子筛因具有很好的选择性吸附、分离性能,广泛应用于石油化工、煤化工、天然气等领域。本文介绍了13X分子筛的性能评价方法及标准化过程,并对HG/T 2690-2012《13X分子筛》行业标准进行了解读与介绍,可以帮助各领域标准应用者正确运用标准,以达到预期目的。     

13X分子筛为载体制备单壁碳纳米管研究

采用流化床法,以Fe/13X分子筛作为催化剂载体,催化裂解正己烷制备出定向排列的、较纯的单壁碳纳米管.利用TEM、HRTEM、TG和Raman对产物进行了表征,对不同浸泡时间Fe/13X分子筛制成的单壁碳管的含量和分子筛的负载量进行了分析,研究了催化剂铁负载量对单壁碳纳米管的产量和直径的影响.结果表明,单壁碳纳米管产量受催化剂含量和活性的共同影响,且在一个特定催化剂负载量下碳管产量可以达到最高,而其直径变化不大,且不受催化剂负载量的影响.     

钾长石合成13X分子筛的实验研究

以钾长石为主要原料,经焙烧和水热合成工艺,合成了１３Ｘ分子筛粉．采用正交设计法确定了各工艺过程中的最佳工艺参数．合成分子筛的ＸＲＤ图、晶胞参数、ＳＥＭ图、ＤＴＡ图、化学成分、硅铝比与理想的１３Ｘ分子筛相似;吸附量达到国家化学工业产品标准．     

13X分子筛处理电镀废水

1　前　言电镀废水中含有大量重金属离子和少量有机物 ,这种废水不能直接采用活性污泥法来处理。因为活性污泥法只处理废水中的有机物 ,并且废水中的大量重金属离子会对活性污泥产生毒害作用。过去我厂对这种废水的预处理是采用加碱沉淀法 ,但一段时间的运行发现 ,由于电镀废水中存在多种重金属离子 ,用这种方法很难控制加碱量 ,而且不能连续进行处理 ,处理成本较高。现在我厂采用 13Ｘ分子筛对这种废水进行预处理试验。13Ｘ分子筛之所以能有效地去除电镀废水中的重金属离子 ,是因为其特殊的结构。 13Ｘ分子筛具有很大的地表面积 ,表面可以…     

离子交换13X分子筛的吸附性能与电负性之间的关系

用Sanderson's电负性理论，研究了二价碱金属阳离子交换13X分子筛的吸附性能。证明分子筛的平均电负性大的，吸附量也大。理论计算与实验结果基本一致。     

容量法测定13X分子筛静态二氧化碳吸附量及其标准化研究

本文介绍了容量法测定13X分子筛静态二氧化碳CO2吸附量,并与现行重量法进行了比较;物理吸附仪是根据容量法原理制作的典型气体吸附测量仪器,使用物理吸附仪测定了两种13X分子筛产品的不同压力下的二氧化碳吸附量,尤其精确测定了低压下的吸附量,更加全面的表征了13X分子筛的CO2吸附性能,为其在空分行业的应用提供了指导数据;探讨了制定基于容量法测定二氧化碳吸附量的相关检测方法标准的可行性。     

基于13X沸石分子筛/MgCl_2的复合吸附剂性能实验研究

复合吸附剂的吸附性能是吸附制冷循环过程中的一个重要参数,基于测试整体成型复合吸附剂吸附性能的需要,本文设计搭建了一种整体成型吸附剂性能测试装置,对复合吸附剂MgCl_2-13X进行了吸附性能测试实验。结果表明:该实验装置中吸附床外侧底部的温度变化速率较接近吸附床内部底部吸附剂的温度变化速率,二者温度变化速率相差0.01~1.9℃/min,整个吸附和脱附过程二者温度的平均值相差约3.24%,能够满足吸附剂性能测试实验的要求。吸附剂性能测试实验及电镜下吸附剂的微观结构表明:浸泡法制备的复合吸附剂的吸附性能与MgCl_2溶液的浓度有关,MgCl_2能够改善13X沸石分子筛的吸附性能,本实验测得当MgCl_2溶液的浓度为15%时所制得复合吸附剂MX3性能最优,其最大吸附量为0.32 g/g,最大吸附速率0.59 g/min,相比单一吸附剂13X沸石分子筛提高了20%。     

煤矸石制备X型分子筛对氨氮吸附性能的研究

以煤矸石为主要原料,经活化、水热反应合成出X型分子筛,讨论了合成中碱度对产品的影响。用X型分子筛对水溶液中氨氮进行吸附处理,结果表明:合成的X型分子筛结晶度较高、晶型完整无杂晶;氨氮吸附规律很好地符合Freundlich吸附等温式,吸附效果与X型分子筛的投加量有关,50mL浓度为150mg.L-1的氨氮溶液中加入1g分子筛的去除率可达62.01%,并且对氨氮的吸附速度快,在有机物存在的情况下仍对氨氮具有较好的吸附效果。     

载Ag改性13X分子筛的制备及其燃油吸附脱硫性能研究

通过金属硝酸盐溶液浸渍离子交换并结合焙烧的方式,制备负载Ag+改性13X分子筛,并考查其在燃油吸附脱硫中的应用。比较负载不同金属离子改性13X分子筛对模拟燃油中噻吩的吸附脱除能力,确定了对13X分子筛吸附脱硫能力影响依序为Ag+>Ni 2+>Zn2+>Fe3+,结果符合软硬酸碱理论。分析了焙烧条件对载银改性分子筛吸附脱硫能力的影响,确定最优焙烧温度450℃、焙烧时间6h。对Ag(Ⅰ)-13X进行SEM、XRD、BET等表征,结果表明改性过程没有明显改变分子筛原本的多孔结构。通过对比13X分子筛改性前后对模拟汽油的填充床吸附实验,表明载银改性后,分子筛吸附剂的脱硫能力得到显著提高。     

聚苯胺/MCM-41介孔分子筛导电复合材料的制备及其表征

利用MCM-41介孔分子筛单分散孔道特性作为"纳米反应器",在其孔道内合成聚苯胺.讨论了HCl浓度、(NH4)2SO8浓度和聚合温度对复合材料导电性的影响,得到最佳的聚合条件:HCl:1.5mol/L,(NH4)2SO8:1.0mol/L,聚合温度:15℃,此时的电导率为0.61s/cm.在最佳合成条件下,对聚苯胺/MCM-41介孔分子筛导电复合材料进行SEM、红外光谱分析.     

Preparation and properties of polyurethane/zeolite 13X composites

The pre-polymerization method was used to prepare polyurethane/zeolite 13X (PU/13X) composites. The effects of zeolite 13X content and its surface organic modification on the mechanical properties of composites were investigated. It was demonstrated that the mechanical properties of PU/13X composites were better than that of pure PU. The surface organic modification of zeolite 13X had no obvious effect on the mechanical properties of PU/13X composites. The optimal tensile strength and tear strength were obtained with 3–5% and 5–7% zeolite 13X loading, respectively. Thermogravimetric analysis (TGA) results showed that the decomposition temperature of PU/13X composites increased in comparison with pure PU. Dynamic mechanical analyzer (DMA) suggested a lower glass transition temperature (T_g) and better micro-phase separation of soft and hard segments in PU/13X composites. Besides, PU/13X composites had excellent solvent resistance performance.     

ATO/CaSO4复合导电粉制备的研究

复合导电粉具有良好的导电性、稳定性和分散性,广泛用于防静电、电磁屏蔽等诸多领域.采用共沉淀法在硫酸钙晶须表面包覆一层ATO来制备ATO/CaSO4复合导电粉,并研究制备条件对导电粉电阻率的影响.结果表明,最佳制备条件为:Sb/Sn摩尔比1∶10,硫酸钙晶须浓度7.5％,水解温度35℃,水解pH6,煅烧温度650℃,煅烧时间2h.     

富含石英煤矸石制备13X型分子筛-活性炭及其对SO_2的吸附性能

以富含石英的煤矸石为主要原料,经NaOH碱熔活化、水热反应合成出13X型分子筛-活性炭复合材料。首先将与NaOH混合后的煤矸石在Ar气氛中高温活化,然后将活化后产物加入到一定浓度的NaOH溶液中,分别研究了钠硅比、水钠比、陈化时间与晶化时间对产物的影响。最后,通过XRD、SEM考察了复合材料的物相及形貌,并研究其对SO2的吸附性能。结果表明,产物为纯净的13X型分子筛-活性炭复合材料,晶形完好、平均粒径为1~2μm;其对SO2吸附量为50.3mg/g。     

Adsorption characteristics of ammonium ion by zeolite 13X

With synthetic wastewater, lab-scale batch experiments and column experiments were carried out to investigate the adsorption characteristics of ammonium ion by zeolite 13X which is a hydrothermally synthetic byproduct accompanied with preparation of potassium carbonate from insoluble potash ores. The Langmuir and Freundlich models were applied to describe the equilibrium isotherms for ammonium ion uptake and the Langmuir model agrees very well with experimental data. Thermodynamic parameters including changes in the standard free energy (DeltaG(0)), enthalpy (DeltaH(0)) and entropy (DeltaS(0)) were also calculated. The results show that the exchange process of ammonium ion by zeolite 13X is spontaneous and exothermic. The pseudo second-order kinetic model was found to provide excellent kinetic data fitting (R(2)>0.999). The effects of relevant dynamic parameters, such as influent flow rate, adsorbent bed height and initial ammonium ion concentration on the adsorption of ammonium ion were examined, respectively. The Thomas model was applied to predict the breakthrough curves and to determine the characteristic parameters of column useful for process design and was found suitable for describing the adsorption process of the dynamic behavior of the zeolite 13X column. The total adsorbed quantities, equilibrium uptakes and total removal percents of ammonium ion related to the effluent volumes were determined by evaluating the breakthrough curves obtained at different conditions.     

各向异性导电胶用新型导电复合粒子的制备

采用无钯活化的化学镀的方法成功地制备出外镀银/铜/环氧树脂新型导电复合粒子,并对导电复合粒子进行了光学显微镜、SEM和EDS分析.结果表明:制备的导电微粒密度小,具有良好的导电性能,可以满足各向异性导电胶应用需求.     

镍-磷-钛硅分子筛复合材料的制备与催化性能

以多级孔钛硅分子筛(HTS-1)为复合相、泡沫镍(NF)为基体,采用化学复合镀和原位处理工艺制备了镍-磷-钛硅分子筛(Ni-P-HTS-1/NF-T)复合材料,并对其电催化析氧反应(OER)性能进行研究.结果 表明,Ni-P-HTS-1/NF-T复合材料在1 mol/L的KOH电解液中具有较快的OER动力学及电子转移速...     

Synthesis and characterization of 13X zeolite from low-grade natural kaolin

In this study, 13X zeolite was successfully synthesized from low-grade natural kaolin via alkali fusion followed by hydrothermal treatment, without extra Si source or dealumination. Fusion with NaOH, followed by hydrothermal reaction, kaolinite, illite and trace of quartz in kaolin sample were converted into zeolite. The effects of various factors during the synthesis process such as NaOH addition amount, crystallization time and temperature on the crystalline products were studied. The optimum synthesis conditions to get purity 13X zeolite were found to be alkali fusion of kaolin with the weight ration of NaOH/kaolin = 2.0 at 200 °C for 4 h, and crystallized at 90 °C for 8 h after homogenization by agitated at 50 °C for 2 h. The product was characterized by X-ray diffraction (XRD), Scanning Electron Microscopy (SEM), Fourier Transform Infrared Spectroscopy (FT-IR) and N₂ adsorption–desorption. The BET surface area of the product was found to be 326 m² g⁻¹. It can be concluded that the study provides the basic data and the process for extensive and efficient utilization of low-grade natural kaolin.     

CdSe/聚苯胺导电复合材料的制备与表征

通过固相法合成了CdSe纳米粒子,采用化学氧化聚合法,在十二烷基苯磺酸钠(NaDBS)存在的条件下,采用氧化剂(同时也是催化剂)过硫酸铵(APS)氧化苯胺(An),制得了CdSe/聚苯胺导电复合材料,并探讨了CdSe的掺入量对导电复合材料的影响.Cdse/聚苯胺导电复合材料用X射线粉末衍射(XRD)、透射电镜(TEM)、红外光谱(FT-IR)和四探针电导率测试仪进行了表征.