2) Brφnsted acid
Brφnsted酸
1.
Highly selective synthesis of α-ionone promoted by Brφnsted acid based on BINOL;
基于联萘酚的有机Brφnsted酸高选择性催化合成α-紫罗兰酮
2.
1,4-Dihydropyridines mediated asymmetric reductions catalyzed by BrΦnsted acids
BrΦnsted酸催化的1,4-二氢吡啶衍生物参与的不对称还原反应
3.
A quantum chemical ONIOM [B3LYP/6-31G(d,p):UFF] method has been applied to study the distribution of Br?nsted acid at nine inequivalent T sites and the acidity of Brφnsted acid in β-zeolite.
基于量子化学ONIOM[B3LYP/6-31G(d,p):UFF]计算方法,研究了β分子筛中Brφnsted酸的落位及其酸性强度。
4) acid catalyst
酸催化剂
1.
Research progress of room temperature ionic liquid acid catalysts;
室温离子液体酸催化剂研究进展
2.
The application of acid catalysts in the coupling reaction of formaldehyde and methyl formate to form methyl glycolate and methyl methoxyacetate was investigated.
选取不同酸强度的催化剂硫酸、三氟甲烷磺酸、硫酸氢钠和硫酸氢钾,研究了酸催化剂在甲醛与甲酸甲酯偶联合成乙醇酸甲酯和甲氧基乙酸甲酯反应中的作用。
3.
Catalytic performances of various acid catalysts for coupling of methyl formate with formaldehyde to form methyl glycolate (MG)and methoxy methyl acetate (MMAc)have been investigated in a portable autoclave.
在釜式反应器中研究了甲醛和甲酸甲酯偶联生成乙醇酸甲酯及甲氧基乙酸甲酯反应的各种酸催化剂的性能。
6) non-acid catalyst
非酸催化剂
1.
Cetyl phthalate was prepared from phthalic anhydride and cetyl alcohol as raw materials catalyzed by non-acid catalyst.
以苯酐与十六醇为原料,选用非酸催化剂,在实验室合成了增塑剂邻苯二甲酸双十六烷基酯。
2.
The synthesis of the epoxyfuroic-oleic butyl was studied by using of non-acid catalyst.
采用非酸催化剂，对环氧糠油酸丁酯的合成进行了研究。
3.
Di-octyl-ditridecyl pyromellitate was synthesized with using non-acid catalyst.
采用非酸催化剂合成了均苯四甲酸·异辛酯·十三酯。
补充资料：BR
顺丁橡胶是1，3-丁二烯采用定向溶液聚合方法得到的高顺式1，4结构含量的聚丁二烯，称为聚丁二烯橡胶，是有规立构橡胶，简称 BR， 高分子量的顺丁橡胶分子量为(80-120)×104；中高分子量的顺丁橡胶分子量为(25-40)×104。分子量分布较窄。玻璃化温度TG＝-110 ℃。具有弹性高、低温性能好、耐磨性优异、耐曲挠性良好等特点。顺丁橡胶的缺点是拉伸强度、撕裂强度较低，抗湿滑性差，冷流性大，加工性能稍差。溶解度参数δ＝8．3-8．6。溶于环己烷、正庚烷、正己烷、苯、甲苯等。
拉伸强度约13～14Mpa，扯断伸长率约为450%。
拉伸强度约13～14Mpa，扯断伸长率约为450%。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条