偕胺肟螯合树脂的合成研究及铀吸附性能测定

采用悬浮聚合的方法成功地合成了以二乙烯苯（DVB）交联丙烯腈（AN）共聚物为骨架的胺肟大孔螯合树脂。较详尽地研究了DVB－AN珠体胺肟化反应的影响因素：反应介质、反应比、反应温度、反应时间等，成功地制备了不同物理性能和不同单体组成的共聚物及胺肟螯合树脂，并且探讨了交联剂、致扎利、极性单体等因素对树脂的化学交换容量的影响。在本文描述的实验条件下，胺肟螯合树脂（干）的化学交换容量达到4．0mmol／g以上，经初步测定铀吸附性能取得了理想结果。     

大孔树脂催化假性甲基紫罗兰酮的环化

大孔树脂D001CC催化环化假性甲基紫罗兰合成甲基紫罗兰酮。最佳反应条件是，树脂用量为假性甲基紫罗兰酮的质量为1－1.5倍，反应介质为CH2Cl2，反应温度为回流温度，反应时间为4－6h。甲基紫罗兰酮的产率达79.9%，三种主要异构体含量达91.8%。     

Adsorption isotherms of phenols from water onto macroreticular resins

The amounts of equilibrium adsorption of phenol and 4-chlorophenol from water on non-ionic macroreticular resins were measured in the temperature range 288–318 K. It was shown that the isotherm data could not be fit by any conventional two- or three-parameter equation including the Langmuir, Freundlich, BET, and Redlich–Peterson equations over the entire range of concentration (1–32 mol m⁻³). They were well fit by combined BET equation or its modified form with the Freundlich or Langmuir equation, depending on the types of solutes and the resins. Such different fitting results could be related to the solute–resin interactions owing to the relatively wide pore size distribution of the resins. The effect of temperature on adsorption equilibrium was also discussed.     

Effects of post-crosslinking of macroreticular styrene-divinylbenzene copolymers on their morphology

We performed a detailed comparison of properties of two different styrenic polymers containing divinylbenzene as the crosslinker before and after the introduction of the additional crosslinks by Friedel-Craft's reaction of the residual double bonds. For the polymer characterization was used a wide selection of methods, including nitrogen adsorption/desorption, inverse steric exclusion chromatography, MAS NMR and AFM. The residual double bonds are quite probably located in the dense cores of the microgel domains where steric hindrances prevented them to react during the polymerization. Reinforcement of the cores of polymer microgel domains by transformation of the residual double bonds into additional crosslinks by the Friedel-Craft's reaction results then in greater stability of the already existing pores rather than in creation of new pores by incomplete collapse of swollen polymer gel.     

大孔吸附树脂分离纯化山楂果中原花青素的研究

筛选适合分离纯化山楂果中原花青素的大孔吸附树脂并确立纯化工艺参数.以树脂对原花青素的吸附量、解吸附率及吸附速率为考察指标,选用14种型号大孔吸附树脂进行纯化.结果表明:在所选树脂中以D101树脂吸附与洗脱效果最佳,测定吸附温度为45℃,pH值为3.0,解吸剂为75%乙醇,吸附速率和解吸速率分别为4ml/min和2ml/min,山楂原花青素的纯度可达到38.7%,回收率可达到94.1%,且D101大孔吸附树脂对山楂原花青素的精制具有较好的重复使用性能.     

Adsorption and desorption properties of macroreticular resins for salidroside from Rhodiola sachalinensis A. Bor

Four different macroreticular resins (HZ-801, HPD500, HPD700 and DA201) were evaluated for the adsorption properties of the salidroside extracted from Rhodiola sachalinensis A. Bor. The results showed that DA-201 displayed the optimal adsorption and desorption properties. The static and dynamic adsorption capacities of DA-201 were 21.88 and 13.25 mg/ml, respectively. The purity of 13.8% for the partially purified salidroside product, which was higher than the purity of 10% for sales in the markets, was achieved by one-step separation and purification with 50% ethanol.     

树脂层析法脱色和浓缩紫杉醇

１前言紫杉醇（Ｐａｃｌｉｔａｘｅｌ,商品名Ｔａｘｏｌ）是红豆杉属植物中独有的一种抗肿瘤天然药物,由美国化学家Ｗａｎｉ和Ｗａｌｌ［１］等人于１９７１年首次分离得到,并于１９９２年被美国ＦＤＡ正式批准为抗卵巢癌新药。由于其独特的抗癌作用机制及显著的疗效而...     

微孔滤膜与大孔树脂纯化苦瓜皂苷的工艺研究

研究苦瓜皂苷的纯化工艺,考察微孔滤膜精制、大孔树脂富集纯化苦瓜皂苷的性能和参数,苦瓜浸取液经过微孔滤膜精制,上大孔树脂柱,吸附平衡后将苦瓜皂甙富集于80%乙醇洗脱液中。冷冻干燥乙醇洗脱液所得的产品中苦瓜皂苷含量达79%。     

Adsorption of phenols onto macroreticular resin particles

Experimental uptake curves wore collected by a shallow bed technique at 298.2 K. Adsorbent particles employed were macroreticular (MR) resins and adsorbates were phenol and its derivatives. From the uptake curves and equilibrium data obtained by the so-called, batch bottle technique, equilibrium and kinetic parameters were determined and the effects of functional groups within both adsorbate molecules and adsorbent particles on those parameters are discussed. From the results, it became clear that physical and chemical properties, surface area of adsorbent functional group, and solubility of adsorbates affected adsorption equilibria. Also, nitro-functional groups seemed to hinder adsorption equilibria and kinetics. Results can be explained by the resonance effects of functional groups.