The combined scheme of selective hydrogenation and etherization of FCC’s light gasoline and hydrogenation desulfurization of heavy gasoline can make gasoline quality meet EURO IV Standard, indicating that this combined scheme is a feasible scheme selection for gasoline quality updating and upgrading.
FCC汽油实施加氢、醚化及重汽油加氢脱硫组合方案后,可使该汽油质量满足欧IV标准,说明该组合方案是实现汽油产品升级换代的一种可行的方案选择。
Synthesis technology and property of hydroxypropyl starch by using potato starch as raw material, propylene oxide as etherization reagent and sodium hydroxide as catalyst, were studied in this paper.
本文以马铃薯淀粉为原料,环氧丙烷为醚化剂,氢氧化钠为催化剂对低取代度羟丙基淀粉的制备工艺进行了研究。
The preparation and property of hydroxypropyl mung bean starch were studied by using mung bean starch as raw materials,epoxypropane as etherization reagent,sodium hydroxide as catalyst,sodium sulfate as gelatinization inhibitor.
以绿豆淀粉为原料,环氧丙烷为醚化剂,氢氧化钠为催化剂,无水硫酸钠为膨胀抑制剂,对羟丙基绿豆淀粉合成工艺及性能进行了研究。
Effect of Carrier Activation on Etherification Activity of PW_(12)/Carbonized Resin Catalyst;
载体活化对PW_(12)/炭化树脂催化剂醚化活性的影响
Studies on catalyst for production of diisopropyl ether by propylene hydration-etherification;
丙烯醚化合成二异丙醚催化剂研究
Reaction properties of RZE-3 zeolite catalyst for etherification of FCC light gasoline;
轻汽油醚化沸石催化剂反应性能
With corn starch as material, hydroxyethylated starch was prepared by first hydrolysing the starchwith acid, then etherifying it with epoxyethane.
介绍了一种以玉米淀粉为原料，将淀粉用酸水解后与环氧乙烷进行醚化反应制备羟乙基淀粉的方法。
Hydroxyethyl carboxymethyl cellulose(HECMC) was synthesized by using chloroethanol as etherifying agent instead of oxirane and chloroacetic acid without isolating intermediate.
探讨了用氯乙醇代替环氧乙烷和一氯醋酸作醚化剂，不用分离中间产物合成ＨＥＣＭＣ。
The paper ascertains antioxidant center of dihydromyricetin molecular structure existing on B loop 3 , 4 , 5 location of phenol hydroxy by etherifying reaction in combination with quantum chemistry computation.
本研究通过量子化学计算手段和实验醚化处理相结合,确定了二氢杨梅素分子结构的抗氧化活性中心在其B环上的3'、4'、5'位连酚羟基结构,同时也验证了量子化学计算在研究黄酮类物质分子结构与表现性质中的正确预测性和指导性。
Modified sweet potato starch flocculants were prepared with cationic etherizing agent and microwave technique,and used to treat the dyeing and printing wastewaters.
采用微波辐射技术,用阳离子醚化剂对红薯淀粉进行改性,制备了改性红薯淀粉絮凝剂,并用其处理印染废水。
Chloro 2 hydroxypropyl trimethyl ammonium chloride an etherizing agent,for modified starch, was synthesised from epichlorohydrin.
以环氧氯丙烷为原料合成了 3-氯 - 2 -羟丙基基三甲基氯化铵 ,后者作为改性淀粉的醚化剂。
The experiment reveals that selective silylation reaction toward Ⅰ containg multiple hydroxyl groups is promoted by polar aprotic solvent and organic base catalyst with unshare.
以红霉素A与盐酸羟胺反应得到红霉素A肟(EMAO,Ⅰ),再以叔丁基二甲基氯硅烷(TBDMSC l)与Ⅰ进行硅醚化反应制备红霉素A9(O-叔丁基二甲基硅)肟(TBDS-EMAO,Ⅱ)。
Propene hydration etherification reaction catalyzed by β zeolite was studied by using in situ FT IR technique, and the effects of surface acidity on the reaction were discussed.
采用原位红外光谱技术 ,对 β沸石催化剂上的丙烯水合醚化反应过程进行了研究 ,并结合催化剂的表面酸性进行了讨论 。
Propene hydration etherification and isopropanol dehydration reactions catalyzed by β zeolite were investigated using microreactor equipped with GC MS.
在与色 质联用仪相连的微反装置上 ,考察了Hβ沸石及改性的Hβ沸石催化剂上丙烯水合醚化及异丙醇脱水的反应行为 。
βzeolite shows high catalytic activity for hydration etherification of propene, but its stability needs to be improved.
采用该方法改性的催化剂 ,对丙烯水合醚化反应连续运转 72 0h ,丙烯转化率由 5 6 6 %仅降为 5 2 % ,表明催化剂稳定性得到明显改