大孔吸附树脂分离纯化杜仲中活性成分

比较了AB-8．NKA-9．NKA-11．D-140．D-101．HPD-600、S-8及聚酰胺等8种吸附树脂对杜仲中的活性成分京尼平甙和松脂醇二葡萄糖甙的吸附及脱附性能．在静态吸附研究的基础上，筛选出效果较好的树脂进行动态实验研究．实验表明：最佳的同时分离纯化松脂醇二葡萄糖甙和京尼平甙的树脂为S-8．并进行了该树脂对杜仲中两种活性成分的吸附和脱附研究，确定了最佳的工艺参数。     

STUDIES ON THE SORPTION OF MACROPOROUS PHOSPHONIC ACID RESIN FOR LANTHANUM

Thesynthesischaracterizationsorptionbehaviorandmechanismofchelateresinfornoblemetalions[1,2]andlanthanum[3]havebeenpublishedbytheauthorandhiscoworkers.Macroporousphosphonicacidresin(PAR)containsafunctionalgroup[-PO(OH),],whichpossessnotonlyprotonthatcanexchangewithcanon,butalsoanoxygenatomoffunctionalgroupthatcancoordinatedirectlywithmetal.Inrecentyears,muchresearchhasbeenmadeonusingPAR[4-7].adsorbingcertainmetalions.Inthispaper,thesorptionpropertiesofPARforLa(III)wereinvestigated.Aloto…     

Opal and inverse opal photonic crystals: Fabrication and characterization

Three-dimensional photonic crystals made of close-packed polymethylmethacrylate (PMMA) spheres or air spheres in silica, titania and ceria matrices have been fabricated and characterized using SEM, XRD, Raman spectroscopy and UV–Vis transmittance measurements. The PMMA colloidal crystals (opals) were grown by self-assembly from aqueous suspensions of monodisperse PMMA spheres with diameters between 280 and 415 nm. SEM confirmed the PMMA spheres crystallized uniformly in a face-centred cubic (fcc) array, and UV–Vis measurements show that the colloidal crystals possess pseudo photonic band gaps in the visible and near-IR regions. Inverse opals were prepared by depositing silica (SiO₂), titania (TiO₂) or ceria (CeO₂) in the voids of the PMMA colloidal crystals using sol-gel procedures, then calcining the resulting structure at 550 °C to remove the polymer template. The resulting macroporous materials showed fcc ordering of air spheres separated by thin frameworks of amorphous silica, nanocrystalline titania or nanocrystalline ceria particles, respectively. Optical measurements confirmed the photonic nature of the inverse opal arrays. UV–Vis data collected for the opals and inverse opals obeyed a modified Bragg’s law expression that considers both diffraction and refraction of light by the photonic crystal architectures. The versatility of the colloidal crystal template approach for the fabrication of macroporous oxide structures is demonstrated.     

ADSORPTION OF MACROPOROUS PHOSPHONIC ACID RESIN FOR INDIUM

1. INTRODUCTION The research papers about synthesis characterization and adsorption property of polymeric materials have been reported in recent years [1~8]. Macroporous phosphonic acid resin (PAR) is a novel polymeric material which contains a functional group of [-PO(OH)2]. It has quite a lot of advantages such as high adsorption capacity, easy regeneration and convenient operation. PAR can be effectively used in the adsorption of metal ions. So far, however, there is no report abo…     

PS/PVC互贯大孔吸附树脂对脲酸的吸附研究

大孔球状PVC经苯乙烯的自由基互穿聚合反应改性得PS PVC大孔互贯树脂 ,再与有机胺反应制得了PS PVC互贯含氮大孔吸附树脂 .研究表明 ,所得吸附树脂对脲酸的吸附率可达 5 0 %以上 ,在清除体液中过量脲酸方面具有应用潜力 .同时对吸附树脂含氮量与吸附脲酸性能的关系以及其它因素的影响也进行了探讨     

ISOLATION AND PURIFICATION OF ALKALOIDS FROM PLUMULA NELUMBINIS BY DOUBLE-COLUMN ADSORPTION CHROMOTOGRAPHY

The performance of adsorption and separation for liensinine, isoliensinine and neferine was studied by double-column adsorption chromatography using macroporous adsorption and cation exchange resins. The alkaloid extract with 49.2% total contents by mass representing 10.6% liensinine, 10.6% isoliensinine and 28.0% neferine respectively was prepared by D72 cation exchange resins, in which most of the impurities were water-soluble alkaloids. Furthermore, the alkaloid extract with 82.6% total contents by mass containing 33.1%, 15.0% and 34.5% of the three adsorbates respectively was prepared by double-column adsorption chromatography using AKS-W macroporous adsorption and D72 cation exchange resins. As a result, the content of single and total alkaloids has been greatly increased by the double-column adsorption chromatography.     

THERMODYNAMIC STUDY ON ADSORPTION OF AROMATIC SULFONIC ACIDS ONTO MACROPOROUS WEAK BASE ANION EXCHANGER FROM AQUEOUS SOLUTIONS

INTRODUCTIONAromatic sulfonic acids are important intermediates in the production of a variety of synthetic dyes, opticalbrighteners, fluorescent whitening agents and pharmaceuticals. A variety of substituted benzene and naphthalenesulfonates are thus produced on a large scale in the chemical industry. Generally, aromatic sulfonic acids areprepared by sulphonation of simple aromatic hydrocarbons or their derivatives. Due to the good solubility andstrong hydrophilicity of aromatic sulfonic…     

TREATMENT AND RESOURCE REUSE OF 1，2，4—ACID PRODUCING EFFLUENT WITH MACROPOROUS POLYMERIC ADSORBENT

The treatment and resource reuse of 1,2,4-acid producing wastewater by self-mademacroporous adsorption resin ND,A-107 was studied in this paper. Optimum adsorption anddesorption process parameters were acquired by systematically study. The polymeric resin NDA-10 7indicated good adsorption & desorption of 1,2, 4-acid in the wastewater. The removal efficiency of1,2,4-acid, CODer is about 78%, 72% respectively. It is evident that this adsorption process is anefficient treatment method for 1,2,4-acid producing wastewater. At the same time, the accumulationand resource reuse of l,2, 4-acid can be realized in this process.     

DESORPTION OF VOCs FROM POLYMERIC ADSORBENTS UNDER MICROWAVE FIELD

1. INTRODUCTION Nowdays the volatile organic compounds (VOCs) have become important pollutants to air [1]. The source of these wastes is very wide. The leakage of the VOCs from chemical and pharmaceutical manufacturing, printing processes, paint and adhesive manufacturing and applications, composites and fiberglass molding etc. is the source of the pollutants. A number of adsorbents are capable of capturing a wide range of VOCs. However, the conventional process of regenerating …