松香基吸附树脂对麻黄草提取液中麻黄碱的分离提纯应用研究

用松香基吸附树脂(马来松香乙二醇丙烯酯-丙烯酸共聚物)分离和提纯麻黄草提取液中的麻黄碱。结果表明,松香基吸附树脂对麻黄碱的最大静态吸附量为191.2 mg/g,最大动态吸附量为15.8 mg/g,树脂对麻黄碱的吸附动力学符合粒内扩散模型。在最佳条件下,经松香基吸附树脂分离提纯后,麻黄碱的固含量从14.6%提高到73.8%(提高到原来的5.05倍),吸附树脂重复使用2次,分离提纯效果没有明显变化。     

松香基功能高分子吸附分离对甲苯胺的研究

以松香基功能高分子为吸附树脂,对水溶液中的对甲苯胺进行静态吸附,探讨了pH值、对甲苯胺初始浓度、温度和吸附时间等因素对吸附量的影响,并考察了解吸效果。结果表明,最佳的吸附工艺条件为:pH值7.5、对甲苯胺初始浓度1500mg.L-1、温度30℃、吸附时间5h,在此条件下,松香基功能高分子对对甲苯胺的吸附量达82.13mg.g-1;采用1%HCl溶液进行洗脱,解吸率为96%。     

微生物发酵麻黄草提取麻黄碱的优化工艺研究

采用微生物发酵麻黄草提取麻黄碱,对麻黄草发酵条件进行了研究.确定最佳发酵条件为:茵丝体接种量10%,料液比1:1.5,发酵时间20 h,发酵温度38℃.麻黄草发酵后在常压最佳提取条件(提取次数3次,每次提取时间1 h.提取温度80℃,料液比1;10)下,麻黄碱的平均提取率为0.9%,较传统高温高压提取工艺提高了25.8%.表明微生物发酵麻黄草可以提高麻黄碱提取率,减少能源消耗,降低生产成本.     

松香树脂油制备液体树脂的研究

松香树脂油先用碱液进行多次洗涤,然后用吸附剂进行吸附来改善其气味;树脂油用顺丁烯二酸酐进行改性,然后用醇类酯化制备液体树脂。研究结果表明：用浓度10%的碱液洗涤5次,然后用20 g活性炭和20 g活性白土吸附,可以除去树脂油的刺激性气味;树脂油先用5%的顺丁烯二酸酐进行加成,然后用10%庚醇酯化制备液体树脂;添加液体树脂可显著提高SIS胶的初粘力。     

大孔吸附树脂对生物碱分离研究概述

大孔吸附树脂具有吸附效果好、选择性好、比表面积大、易于再生、价格低廉且性质稳定等优点,已广泛应用于中药生物碱的分离纯化过程。对近5年来大孔吸附树脂在分离纯化中药生物碱类化合物方面的文献进行归纳整理,并对影响大孔树脂吸附效果的因素进行了分析。概述了大孔树脂在中药生物碱分离纯化中的研究现状,并针对大孔树脂技术在纯化生物碱中的发展前景及存在的问题进行了分析讨论。     

功能化松香丙烯醇酯聚合物吸附分离银杏黄酮

研究了功能化松香丙烯醇酯聚合物吸附分离银杏黄酮的效果.结果表明,功能化松香丙烯醇酯聚合物对银杏黄酮的静态吸附量为22.6 mg·g-1,洗脱液为70%乙醇水溶液,动态吸附量为4.7 mg·g-1,功能化交联松香丙烯醇酯聚合物对银杏黄酮的静态吸附量和动态吸附量分别为14.2 mg·g-1和5.5 mg·g-1.经过再生,功能化松香丙烯醇酯聚合物可以重复使用,3次使用后对银杏黄酮的吸附能力没有明显降低.     

大孔吸附树脂对灰黄霉素提取液中色素试验

采用大孔吸附树脂法对灰黄霉素提取液中色素成分的去除进行了探索试验,静态筛选实验结果表明,所选三种吸附树脂对灰黄霉素提取液中色素的吸附容量均不大,不能达到脱色要求。进一步考察影响吸附因素的实验结果表明,pH、温度对吸附均没有太大的影响。通过调节pH、温度也不能达到脱色要求。三种吸附树脂对灰黄霉素吸附率的实验结果表明,三种吸附树脂对灰黄霉素的吸附容量均不高。通过对大孔树脂吸附法去除灰黄霉素提取液中的色素成分的探索实验表明,三种吸附树脂对灰黄霉素提取液中组分的吸附没有选择性,采用大孔吸附树脂法去除灰黄霉素提取液中的色素成分不可行。     

水性油墨用松香改性树脂的研究进展

松香与富马酸、马来酸、马来酸酐或丙烯酸进行Diels Alder加成反应生成多羧基化合物,然后再与醇、胺或烷醇胺进行反应,得到水溶性树脂。本文重点介绍这些水溶性树脂的研究进展及其在水性油墨中的应用情况。     

Separation and purification of resveratrol from Polygonum cuspidatum by macroporous adsorption resin mixed-bed techology

ABSTRACT

This work is focused on separation and purification of resveratrol from Polygonum cuspidatum by macroporous adsorption resin (MAR) mixed-bed technology. Firstly, the optimal MAR mixed-bed was obtained according to the adsorption and desorption performance of 32 kinds of MAR. Then, operation conditions of adsorption and desorption were investigated and optimized, and optimal operation conditions were obtained. Under optimal conditions, the adsorption capacity and adsorption ratio arrived at 23.89 mg g^?1 and 98.53% separately, while the desorption ratio and purity would be 82.05% and 19.32%. The purity was increased by 5 times in the crude extraction after an adsorption/desorption circle. Finally, the adsorption kinetics and thermodynamics were discussed.     

大孔吸附树脂纯化化香树果序总黄酮工艺研究

以吸附量和解吸率为指标对9种大孔吸附树脂进行对比,H-327B是分离纯化化香树总黄酮的理想树脂;热力学、动力学研究表明,Langmuir模型描述化香树果序黄酮在大孔树脂上的吸附规律更为适宜,该吸附属单分子层吸附,提高温度有利于吸附的进行,吸附过程可自发进行;对吸附?解吸工艺条件优化研究表明:当上样质量浓度为8.9 mg/mL、流速为3 BV/h时,H-327B型树脂对化香树果序总黄酮的吸附量较大。采用体积分数90%乙醇水溶液进行洗脱时,用5 BV乙醇洗脱,解吸率达到65%。     

超声提取协同大孔树脂吸附法分离倍花单宁酸

采用超声辅助提取协同大孔树脂吸附法分离倍花单宁酸,考察了吸附树脂用量、pH值、吸附温度和吸附时间对单宁酸提取率的影响。结果表明,吸附液pH为6,添加2 g大孔树脂,50℃下吸附90 min,倍花中单宁酸的提取率为20.56%。     

大孔树脂法吸附分离多棘海盘车多糖的研究

研究了AB-8、D101、DM301三种不同类型的大孔树脂对多棘海盘车多糖的吸附及分离性能。结果表明,AB-8型大孔树脂对多棘海盘车多糖的吸附及解析性能最佳,多糖溶液的pH值为6⁷,洗脱液流速1.0 mL/min,分离提纯效果最佳。     

丙烯酸改性松香基醇酸树脂的合成研究

采用丙烯酸预聚物,植物油、马来海松酸酐等通过单甘油酯法合成了丙烯酸改性松香基醇酸树脂,对产物结构进行了红外表征,通过涂膜性能以及酸值测试研究了丙烯酸树脂用量,植物油的种类和用量以及反应时间对产物性能的影响。结果表明,最佳反应条件为:采用豆油和亚麻油,慢速升温,丙烯酸树脂质量分数2%～8%。合成的改性醇酸树脂较传统的醇酸树脂表干、实干时间短,硬度高,耐冲击性、附着力和耐介质性好。     

Rigid interpenetrating polymer network foams prepared from a rosin-based polyurethane and an epoxy resin

A series of rigid interpenetrating polymer network (IPN) foams, based on a rosin-based polyurethane and an epoxy resin, were prepared by a simultaneous polymerization technique. The changes in the chemical structure, dynamic mechanical properties, and morphology of the rigid IPN foams were investigated by Fourier transform infrared (FTIR) spectroscopy, dynamic mechanical thermal analysis, and scanning electron microscopy. The FTIR analysis showed clearly that the cure rate of the rosin-based rigid polyurethane foam and the epoxy resin were different and, as a result, these two networks formed sequentially in the final rigid IPN foams. All of the rigid IPN foams exhibited a single, broad glass transition that shifted to lower temperature as the epoxy resin content increased. The experimental composition dependence of T_g's of the rigid IPN foams showed slight positive deviation from the Fox equation for homogeneous polymer systems. No phase separation was observed from the scanning electron microscopy investigation. It could be concluded that these two component networks were compatible in the final rigid IPN foams. This compatibility could be attributed to a graft structure in the polyurethane and the epoxy resin networks arising from the reaction of the hydroxyl groups of the epoxy resin with the isocyanate groups of MDI, and from the reaction of the hydroxyl groups of the polyols with the epoxide groups of the epoxy resin, as suggested by FTIR analysis. © 1998 John Wiley & Sons, Inc. J Appl Polym Sci 69: 271–281, 1998     

松香基超支化环氧树脂的合成及性能研究

首先以马来海松酸三缩水甘油酯(MPTGE)和马来海松酸(MPA)为主要原料,一步法合成松香基超支化聚酯(HPR),然后HPR再与环氧氯丙烷(ECH)经开环酯化、闭环反应,得到松香基超支化环氧树脂(HPER)。讨论了开环酯化、闭环反应中各因素对产物性能的影响,采用凝胶色谱仪、红外光谱仪对合成产物进行了表征,并确定了适宜的工艺条件:氯丙烷(ECH)与超支化聚酯(HPR)物质的量比为18∶1,开环反应以四丁基溴化铵为催化剂,用量为反应物总质量的2%,反应温度100℃;闭环反应中以氢氧化钠溶液作为中和剂,50℃下反应3 h。所得环氧树脂的环氧值为0.23 mol/100 g,粘度为850 mPa.s。     

Separation and purification of sulforaphane from broccoli by solid phase extraction

A simple solid-phase extraction (SPE) method for the determination of sulforaphane in broccoli has been developed. The optimal conditions were found to be use of a silica SPE cartridge, and ethyl acetate and dichloromethane as washing and eluting solvents, respectively, which could eliminate interferences originating from the broccoli matrix. The extracts were sufficiently clean to be directly injected into high-performance liquid chromatography (HPLC) for further chromatographic analysis. Good linearity was obtained from 0.05 to 200 μg/mL (r = 0.998) for sulforaphane with the relative standard deviations less than 3.6%. The mean recoveries of sulforaphane from broccoli were more than 90.8% and the detection limit (S/N = 3:1) was 0.02 μg/mL. The SPE method provides a higher yield of sulforaphane from crude extracts compared to conventional liquid-liquid extraction.     

盐析—树脂吸附法处理D-对羟基苯甘氨酸生产废水

采用盐析-树脂NDA-99吸附组合工艺处理D-对羟基苯甘氨酸生产过程中排放的高浓度含酚废水.实验确定的最佳工艺条件:(1)盐析剂为无水Na2SO4,其投加质量浓度为140 g/L,温度40℃,搅拌时间30 min;(2)采用双柱串联吸附,吸附流量10 ml/h,处理水量150 mL/批次.实验结果表明:在最佳工艺条件下对该废水进行处理,出水无色透明,CODCr挥发酚、TOC去除率分别为41.31B～98%、61.28%～64.07%、39.09%～40.46%.