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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… 相似文献
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Yue Sun Ai-min Li Zheng-hao Fei Quan-xing Zhang Shi-he Wang 《高分子科学》2007,(6):621-627
A macroporous polymeric adsorbent NG-8 was synthesized with divinylbenzene using conventional suspension polymerization technique.Its aminated product NG-9 was prepared by introducing tertiary amino groups into NG-8 for removal of tannin acid from aqueous solutions.NG-9 could be used directly without a wetting process and had higher adsorption capacity than NG-8,which might be attributed to the enhanced adsorbent-adsorbate interaction due to the tertiary amino groups on the polymeric matrix.The Langmuir equation was successfully employed to describe the adsorption process.The adsorption enthalpy change further validated the uptake of tannin acid on NG-9 to be an enhanced physical adsorption because of the Lewis acid-base interaction.In addition,adsorption kinetic studies testified that the tertiary amino groups on the polymer matrix could decrease the adsorption rate maybe for the hindrance of the tertiary amino groups and water clusters built up. 相似文献
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大孔阳离子交换树脂对奈替米星的吸附研究 总被引:1,自引:0,他引:1
通过正交实验合成了9种大孔弱酸性阳离子交换树脂,筛选出具有最大动态饱和吸附量的FB-1树脂.采用红外光谱和热重分析的方法对其表征,并研究其对奈替米星的吸附及解吸性能,结果表明:该树脂对奈替米星的吸附符合Langrnuir吸附:用氨水做洗脱剂,0.3mol/L和0.4mol/L的氨水解吸率均达95%以上.FB-1与HD-2树脂比较:动态吸附量FB-1为398.0mg/mL湿树脂、HD-2为232.1mg/mL湿树脂;0.3mol/L氨水解吸,前者解吸率较后者高约15%. 相似文献
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大孔树脂吸附苯和甲苯的平衡及动力学研究 总被引:5,自引:0,他引:5
研究并比较了四种大孔吸附树脂对正庆烷中低浓度苯、甲苯的吸附平衡及动力学。Langmuir方程能够良好地描述吸附等温线,由单组分吸附平衡得到的参数;可以很好地预测双组分吸附平衡。动力学研究表明,内扩散过程是决速步,并估算出粒内扩散系数。 相似文献
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ADSORPTION OF TANNIN FROM AQUEOUS SOLUTION ONTO MACROPOROUS CROSSLINKED POLY(N-VINYL-ACETAMIDE) VIA HYDROGEN BONDING 总被引:3,自引:0,他引:3
XU Mancai WANG Cairong XU Mingcheng SHI Zuoqing ZHANG Shang LI Haitao SHI Rongfu FAN Yunge HE Binglin 《Chinese Journal of Reactive Polymers》2000,(1)
I INTRODUCTIONTannin is existed widely in the roots, stems and fruits of many plants 111. Tannin is stronglyastringent and puckery due to the hydrogen bonding between the phenolic hydroxyl groups intarmin and abide groups in Protein al. A series of PYOb\m won\d be abed if t~ is nOIremoved from the products made from plants. For example, the injection site of the patientwould be red and swollen if tannin had not been removed from the injection made from plantssuch as red-rooted sajvia; … 相似文献
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大孔树脂对水溶液中邻苯二甲酸的吸附行为及其热力学研究 总被引:18,自引:0,他引:18
研究了NDA-150,ND-99和ND-900大孔树脂对水溶液中邻苯二甲酸的吸附热力学特性,结果表明,3种树脂对邻苯二甲酸的吸附都同时满足Freundlich和Langmuir等温吸附方程;NDA-150树脂存在以π-π作用为主的吸附作用,ND-99树脂的吸附行为是由氢键作用及π-π作用共同作用所致,ND-900树脂通过Lewis作用和静电力吸附邻苯二甲酸,吸附是一放热过程且吸附能够自发进行,ND-900树脂上的吸附是熵推动为主的吸附过程,而NDA-150、ND-99树脂上的吸附均为焓推动为主的吸附过程。 相似文献
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大孔吸附树脂分离纯化异甘草素的研究 总被引:1,自引:2,他引:1
研究大孔吸附树脂分离纯化异甘草素的工艺条件及参数。通过研究HPD-600、D4020、D101、AB-8、NKA-II、AL-2和NKA-9树脂对异甘草素的吸附和解吸附能力,筛选最佳树脂为AB-8,并研究了其对异甘草素的吸附和解吸附性能,确定了最佳的吸附与解吸附工艺参数,吸附:pH=5,室温,流速1.5BV/h,溶液处理量为5BV;脱附:洗脱剂为70%的乙醇溶液,流速1BV/h,洗脱剂用量4.5BV。异甘草素样品溶液经AB-8树脂吸附与脱附后回收率为76.7%,纯度由2.02%提高到29.1%,提高了14.4倍。实验结果表明,AB-8树脂对异甘草素的吸附量大,脱附容易,可以应用于异甘草素的分离纯化。 相似文献
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离子交换树脂吸附胞嘧啶核苷三磷酸的动力学和热力学研究 总被引:1,自引:0,他引:1
根据CTP在离子交换树脂上的吸附容量和分离因数的大小,确定Duolite A-30树脂适合CTP与CDP及CMP之间的分离.CTP在Duolite A-30树脂上的吸附动力学和热力学研究表明,在283.15~303.15K之间,CTP的质量浓度在7.5g/L以上时,Duolite A-30树脂对CTP的吸附主要受颗粒扩散的控制,其有效扩散系数为D=3.47×10-7cm2/s,溶液的质量浓度≤1.0g/L时,CTP与Duolitc A-30树脂之间的交换速率主要受液膜控制,其液膜扩散系数为Kf=4.112×10-4/s.热力学参数Eα=9.008kJ/mol,△H=5.17kJ/mol·K,△S283.15K=80.28J/mol·K. 相似文献