聚苯乙烯型双季铵树脂的制备及性能研究

三乙烯二胺和四甲基乙二胺与氯甲基聚苯乙烯反应,得到同时含有季铵和叔胺的强-弱碱型树脂,再用碘甲烷季铵化叔胺,制备聚苯乙烯双季铵树脂;另一种方法是将二甲基苄胺型叔胺树脂用4-溴丁基三甲基溴化铵季铵化引入4碳链双季铵基团。反应结果表明,两类强弱碱基树脂的季铵化反应结果并不理想,二甲基苄胺型叔胺树脂季铵化反应的转化率最高为36%。考察了这些新型双季铵树脂的热稳定性及对水溶液中有机酸(如苯磺酸和对-硝基苯乙酸)的吸附、脱附性能。     

α—葡萄糖基甜菊糖的酶促合成反应（Ⅱ）

研究了以球形纤维素弱阴离子交换剂化载体，固定化葡萄糖基转移酶ＧＴ－１转化甜菊糖为α－葡萄糖基甜菊糖反应的各种影响因素。结果表明，甜菊糖的酶促转经到达一定程度后，继续增大酶用量及淀粉用量，对转化结果没有太多改善。     

INVESTIGATION OF A NEW TYPE OF ADSORBENT——SPHERICAL CARBONIZED ADSORBENT Ⅲ*

Polyvinylidene chloride beads were first heated at 185℃and then pyrolyzed at 960℃undernitrogen atmosphere in a tube-racking furnace. The surface area of the spherical carbonized ad-sorbent exceeds 1,00 M~2/g and its adsorbing rate for creatinine is over 99%. The mechanical strengthof the spherical carbonized adsorbent, 0. 6--0. 8 mm in diameter, is quite good.     

树脂法分离纯化邻硝基苯甲醛

本文报道树脂法从混合物中分离纯化邻硝基苯甲醛的方法。研究说明，通过伯胺树脂与醛的反应对邻硝基苯甲醛进行化学吸附，可以将邻硝基苯甲醛从含有邻硝基甲苯、邻硝基苯甲醛、邻硝基溴苄、邻硝基－α，α─二溴苄、以及邻硝基苄醇的混合物中有效地分离出来。     

氯甲基聚苯乙烯与芳烃的后交联反应研究

氯甲基聚苯乙烯与苯或芳烃发生Ｆｒｉｅｄｅｌ－Ｃｒａｆｔｓ反应，制得了一系列具有高比表面积的吸附树脂，结果表明，后交联反应时，所加芳烃及溶剂对树脂的比表面积有很大的影响，这类树脂对水溶液中苯酚具有较大的吸附量。     

环糊精葡萄糖基转移酶的固定化及其应用：Ⅲ.固定化环糊精葡萄糖基转…

用固定化环糊精葡萄糖基转移酶催化淀粉环化反应，考察了反应时间，乙醇浓度和淀粉液化程度对环糊精产率的影响。环糊精产率最高达５４％，固定化酶经多次重复使用或长时间连连续操作，酶活力降低较少。     

具有精细结构的吸附与离子交换树脂

本文论述了某些具有精细化学，物理结构的离子交换树脂和吸附树脂的特性与应用。     

季铵基吸附树脂的合成及其在甜菊式甙提取分离中的应用

研究了由工业二乙烯苯聚合得到的大孔树脂进行氯甲基化的可行性，考察了聚合物孔结构催化剂用量、反应温度和时间等因素对氯甲基化反应的影响，由氯甲基化树脂制备了强极性季铵基吸附剂。并研究了合成的季铵基吸附剂对甜叶菊提取物中甜菊甙及色素的吸附－脱附性能，发现该吸咐剂对甜菊甙与色素的吸附－脱附性能完全不同，因而可用该吸附剂制备高品质的甜菊式。     

ADSORPTION OF TANNIN FROM AQUEOUS SOLUTION ONTO MACROPOROUS CROSSLINKED POLY(N-VINYL-ACETAMIDE) VIA HYDROGEN BONDING

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; …     

SYNTHESIS AND STRUCTURE OF MACROPOROUS MA-TMPTA COPOLYMERS AND THEIR APPLICATION IN ADSORPTION OF FLAVONOIDS FROM GINKGO LEAVES EXTRACT

1 INTRODUCTIONAdsorption by macroporous polymeric adsorbents is one of tile important methods inpurification of ginkgo leaves extract ill. Amberlite XAD-7, a macroporous polymeric adsorbentbased on methyl methacrylate - trimethylolpropane triacrylate copolymer, was reported to use inadsorptive purification of ginkgo leaves extract and other natural products containing flavonoidsfi.3]. Interaction between the adsorbent and flavonoids is based on hydrogen bonding between theester carbonyl-…