Catalytic synthesis of poly ( lactic acid) with ionic liquid/ stannous chloride as catalyst 离子液体/氯化亚锡催化合成聚乳酸的研究
The key factors affecting the polymer intrinsic viscosity were found to be monomer recrystallization times, stannous octoate concentration and polymerization time. 单体重结晶次数、辛酸亚锡浓度、聚合时间等条件均是影响聚合物特性粘数的重要因素。
Determination of Content of Pentetate Acid in Pentetate Acid and Stannous Chloride for Injection by Spectrophotometry 分光光度法测定注射用亚锡喷替酸中喷替酸含量
Study on the synthesis of lactide using stannous bis ( 2-ethylhexanoate) as catalyst 2-乙基己酸亚锡催化合成丙交酯的合成工艺研究
Study on Colour Keeping Effect of Disodium Stannous Citric on Fruits and Vegetables Corrosion Inhibition of Carbon Steel by Cerium Citrate Compound in NaCl Medium 柠檬酸亚锡二钠对果蔬及其制品护色的研究柠檬酸铈在氯化钠溶液中对碳钢的缓蚀作用
The Relations between Yunnan and Guangxi of the Ming Dynasty and Southeast Asian Countries; Catalytic synthesis of n-butyl cinnamate with stannous chloride 明代滇桂地区与东南亚国家关系述评氯化亚锡催化合成肉桂酸丁酯的研究
By comparing the dehydration methods of three catalytic esterification reactions and the catalysts used under negative pressure, the better method of synthesizing 2 ethylhexyl chloroacetate is using stannous oxide as catalyst under negative pressure. 通过对三种催化酯化反应的脱水方法及负压下使用不同催化剂的比较和选择,提出了以氧化亚锡为催化剂负压脱水合成氯乙酸2乙基己酯的方法。
By means of the cyclic voltammogram, the effects of upper potential and activation mode on the catalytic activity of two Pt/ C catalysts prepared by the sulfurous route and the stannous method for methanol electro-oxidation were investigated. 利用亚硫酸路线和亚锡酸法合成了两种Pt/C催化剂,并利用循环伏安技术,详细地研究了循环伏安高电位和活化方式对Pt/C催化剂的甲醇电氧化催化活性的影响。
This article describes the determination of cobalt and stannous ions in black tin cobalt alloy electroplating baths by means of spectrophotometry. The effect of measuring wave length, oxidant, addition of potassium pyrophosphate, interfering elements and other affecting factors on the measured absorbance were investigated. 利用分光光度法测定锡钴合金镀液中钴(Ⅱ)和锡(Ⅱ)的含量,探讨了测量波长和氧化剂的选择、焦磷酸钾的加入量、干扰元素等对测量结果的影响。
It is found that in the presence of butyl titanate or stannous oxalate as a polycondensation catalyst the carboxyl content is not always on the increase in all high vacuum stage. 发现,钛酸四丁酯或草酸亚锡作为缩聚催化剂时,在整个高真空阶段羧基含量并不是一直增加的。
A new immersion plating process was developed in which copper sulfate and stannous sulfate were used as main salt, with addition of complex, brightener and stabilizer to tin salt. 采用硫酸铜、硫酸亚锡为主盐,加入络合剂、光亮剂、锡盐稳定剂,研究成功了一种新的浸镀铜锡合金工艺。
Study on Discharge Printing of Polyester With Stannous Chloride 涤纶织物氯化亚锡拔染印花工艺的研究
The effect of pet stabilizer in stannous oxalate system 草酸亚锡体系中对PET稳定剂的研究
Research on the Preparation Process of Stannous Octanoate 辛酸亚锡制备工艺研究
The process formula and flow of BH-411 bright sulfate tin plating, maintenance and management of the bath were introduced. The functions of sulfuric acid, stannous sulfate and additive in the electrolyte were discussed. 介绍了BH-411光亮硫酸镀锡的工艺配方、工艺流程和镀液的维护与管理,讨论了镀液中的硫酸、硫酸亚锡和添加剂的作用。
It was considered that ferric chloride hexahydrate, stannous chloride dihydrate and strong-acid cation exchange resin are excellent catalysts with practical application value for synthesis of allyl propionate. 综合评价后认为,六水三氯化铁、二水氯化亚锡和强酸性阳离子交换树脂是在合成丙酸烯丙酯中具有实用价值的催化剂。
We have prepared several complex catalyst of stannous chloride and rare earth chloride to replace mercuric chloride and examined their catalytic activity for the synthesis of vinyl chloride. 本文研究用氯化亚锡和稀土氯化物复合催化剂代替氯化汞合成氯乙烯单体,旨在探索其催化活性。
On the Reduction of DBC-Arsenazo with Stannous Chloride DBC-偶氮胂与氯化亚锡的氧化还原反应
Rapid spectrophotometric determination of tungsten in alloy steel with stannous chloride reduction-ammonium thiocyanate 氯化亚锡还原-硫氰酸铵快速光度法测定合金钢中的钨
Stannous chloride as accelerator for hardening of UPR 氯化亚锡对UPR固化的促进作用
Then add catalyst with 1% weight of reactant, ( stannous octanoate with 1% volume of reactant); 加入催化剂,用量为反应物重量的1%,其中液体的辛酸亚锡用量为反应物体积的1%。
The Research of Using Ammonium Bicarbonate Method to Prepare Stannous Sulfate 用碳酸氢铵法制备硫酸亚锡的研究
In this paper, determination of rhodium in Pt-Rh alloy by dual-wavelength differential spectrophotometric method has been studied. The colour complex of Rh with stannous chloride was formed in medium of hydrochloric acid. 研究了在盐酸体系中用氯化亚锡显色,用双波长差示分光光度法测定铂铑合金中的铑。
The labeling yield is 68% using stannous tartrate as reductant. 酒石酸亚锡为还原剂时,标记率为68%。
Preparation methods of stannous sulfate 硫酸亚锡的制备方法
Processes directly using industrial grade lead oxide reacting with methanesulfonic acid to prepare lead(ⅱ) methanesulfonate and using pure tin pieces reacting with methanesulfonic acid to prepare stannous methanesulfonate were studied. 研究了直接用工业级氧化铅,纯锡块与甲烷磺酸反应,合成甲烷磺酸铅()和甲烷磺酸亚锡的新工艺。
Employing stannous octoate as catalyst, polyester-diol for polyurethane was synthesized based on the dimeric acid methyl ester and ethylene glycol. 以乌桕二聚酸甲酯和乙二醇为原料,辛酸亚锡为催化剂,合成了聚氨酯用聚酯二醇。
With POSS-OH as core initiator, stannous octoate as catalyst, star PCLs were synthesized by ring-opening polymerization ( ROP) of ε-caprolactone. 以POSS-OH为核引发剂,在辛酸亚锡催化下,通过与ε-己内酯的活性开环聚合(ROP),合成了以POSS-OH为核的星形PCLs。