1) pyridine-water-K2CO3
吡啶-水-碳酸钾
1.
The liquid-liquid equilibrium(LLE) data for pyridine-water-K2CO3 system are measured at 25 ℃ and show that pyridine phase contains negligible salt and water phase contains negligible pyridine when the concentrations of K2CO3 in the water phase are equal to or higher than 34.
实验测定了吡啶-水-碳酸钾体系在25℃时的液-液相平衡数据。
2) potassium water
碳酸钾水
3) pyridine-water-KF
吡啶水氟化钾
4) anhydrous potassium carbonate
无水碳酸钾
1.
The reaction of condensation-cyclization of the two prepared compounds at 100 ℃ in the presence of anhydrous potassium carbonate gave 1,4,7,10-tetrakis(p-toluenesulfonyl)-1,4,7,10-tetraazacyclododecane,with a yield of 71%.
在无水碳酸钾存在下,100℃加热使所得两种磺酰化产物缩合环化得到1,4,7,10-四(对甲苯磺酰基)-1,4,7,10-四氮杂环十二烷,产率71。
2.
Cinnamic acid was synthesized by Perkin reaction with anhydrous potassium carbonate as alkaline catalyst,PEG-400 as phase transfer catalyst,and p-tert-butyl catechol as polymerization inhibitor.
以无水碳酸钾为碱催化剂,PEG-400为相转移催化剂,对叔丁基邻苯二酚为阻聚剂,通过Perkin法合成肉桂酸,考察了物料比、碱催化剂用量、PEG-400用量、对叔丁基邻苯二酚用量、回流时间对产品产率的影响。
3.
An improvement on synthetic procedure of cinnamic acid is studied, using anhydrous potassium carbonate and potassium fluorid as catalyst and PEG-400 as phase transfer catalyst.
采用PEG400为相转移催化剂,以无水碳酸钾和氟化钾为催化剂,对肉桂酸的Perkin合成工艺进行了改进,通过考察催化剂配比、反应时间得到最佳的反应条件,产率可达64。
5) potassium carbonate wastewater
碳酸钾废水
6) hydrated potash
含水碳酸钾
补充资料：碳酸钾
化学式K2CO3。 白色结晶；熔点 891℃, 密度2.428克/厘米3(19℃)；热稳定性很高, 升温至1000℃也不分解。碳酸钾易潮解，易溶于水，25℃时每 100克水能溶113.3克。在室温下K2CO3·2H2O比较稳定。工业上多采用在氢氧化钾溶液中通入二氧化碳的方法来制备碳酸钾。碳酸钾主要用于玻璃工业。
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