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- The synthesis methods of nipagin esters catalyzed by sulfuric acid, p- toluene sulfonic acid, ferric sul-fate hydrate, ferric chloride hexahydrate, aluminium chloride hexahydrate, rare earth compound, solid super acid and heteropoly acid were reviewed. 评述了采用硫酸、甲苯磺酸、合硫酸铁、水合三氯化铁、水合三氯化铝、土化合物、体超强酸和杂多酸等催化剂催化合成对羟基苯甲酸酯的方法。
- Keywords sulphur trioxide;sulphonation;methybenzene;P - toluene sulfonic acid; 三氧化硫;磺化;甲苯;对甲苯磺酸;
- p - Toluene sulfonic acid 对甲苯磺酸
- Di 2 ethylexyl maleate is synthesized from maleic anhydride and isooctyl alcohol using toluene p sulfonic acid as a catalyst. 以顺丁烯二酸酐和异辛醇为原料,用对甲苯磺酸作催化剂合成顺丁烯二酸二异辛酯。
- p- Toluene sulfonic acid 对甲苯磺酸
- toluene sulfonic acid 甲苯磺酸
- The synthesis of 1,4 dioxane from diethylene glycol using p toluene sulphonic acid as a catalyst was discussed. 利用二甘醇为原料,以对甲苯磺酸为催化剂合成了1,4-二氧六环。
- Synthesis of perfluoroalkylethylacrylate from polyfluoroalcohol and acrylic acid with p toluene sulphonic acid as catalyst was studied. 以对甲苯磺酸为催化剂,多氟醇和丙烯酸为原料合成全氟烷基乙基丙烯酸酯。
- Coal tar , acetic acid,dodecylbenzene Sulfonic Acid. 本品为深褐色液体；有醋酸及煤焦油的特臭。
- Allyl perfluorocaprylate was synthesized with p-toluene sulfonic acid as esterication catalyst,p-benzenediol as polymerization inhibitor and toluene as solvent,yield>90%,purity>99%(GC). 以对甲苯磺酸为催化剂,对苯二酚为阻聚剂,甲苯为溶剂,全氟辛酸与丙醇发生酯化反应制得全氟辛酸烯丙酯,产品收率>90%25,纯度>99%25(GC)。
- The appIication of p - toIuene sulfonic acid as catalyst for synthesis of carboxyIic ester (ethyl bu-tyrate) is studied. 研究了对甲苯磺酸作为催化剂在羧酸酯（丁酸乙酯）合成中的应用。
- In the second step,the yield of p toluene sulfonhydrazide using tetrahydrofuran as solvent is higher than that of using benzene as solvent. 用四氢呋喃做溶剂比用苯做溶剂可以得到较高产率的对甲基苯磺酰肼中间体;
- Sulfonic acid is a foaming acid available from some of the oil companies. 磺酸是从一些炼油公司获得的一种起泡酸。
- An optimum condition of spectrophotometric determination of trace nitrite in waste water with p aminobenzene sulfonic acid 8 hydroxyquinoline is dealt with. 研究了测定废水中痕量亚硝酸盐的对氨基苯磺酸-8-羟基喹啉光度法。
- Eastman-AQ is a new kind of polymer (ester sulfonic acid) cation exchanger. Eastman-AQ(AQ-55D,AQ-29D)是一种新的聚合物(磺酸酯)阳离子交换剂,涂于玻碳电极上,形成的膜具有强的附着力、高的选择性、良好的离子交换及防污性能。
- Method phenol sulfonic acid chromatometry was used in the experiment. 结果翼首草含糖量较高,且不同药用部位含糖量不同。
- Method The rat model of ulcerative colitis was induced with2,4,6 trinitrobenzene sulfonic acid. 方法采用三硝基苯磺酸法制备大鼠实验性溃疡性结肠炎模型。
- A series of gallate ester were prepared in use of dodecyl benzene sulfonic acid as catalyst. 以工业用十二烷基苯磺酸为催化剂制备了一系列没食子酸酯,讨论了影响酯化反应的各种因素。
- Methods AEO 9 and dodecylbenzene sulfonic acid of different weight ratio were mixed in the solutions. 目的探讨脂肪醇聚氧乙烯醚(AEO)9水溶液增稠条件。
- Dodecylbenzene sulfonic acid was used as catalyst for the preparation of polyethylene glycol diacrylate. 用十二烷基苯磺酸作酯化催化剂,制备聚乙二醇二丙烯酸酯。
