弱碱是难溶于水不能发生完全电离的碱,一般属于不活泼金属形成的碱,如NH3·H2O、Al(OH)3、Cu(OH)2、Fe(OH)2、Fe(OH)3、Zn(OH)2、Mg(OH)2等难溶性的碱。 弱碱指在水溶液中不完全电离的碱,意即质子化反应不完全。一般碱的pH值范围为7~14,其中7为中性,14则为强碱性,相对强碱而言,弱碱从水分子接受质子的能力较差,因而溶液中H+浓度更高,pH值较低。 弱碱的pH大于7但接近7
弱碱性 alkalescence ; slightly alkaline values
弱碱性的 alkalescent ; weakly alkaline
弱碱性阴离子树脂 weak anion resin
弱碱性阴离子交换树脂 weakly basic anion exchange resin ; Weak-base Anion-exchange Resin
弱碱性树脂 weakly basic resin
弱碱性阴离子交换剂 weak-base anion exchanger ; weak base anion exchanger
有机弱碱 InOH ; Organic weak base
弱碱型离子交换 weak base type ion exchange
弱碱苏打水饮料 weak alkali soda drinks ; Weak base soda drinks
The catalyst which is modified by weak base was more active than that modified by strong base in alkali catalyst modification.
弱碱修饰的催化剂优于强碱修饰的催化剂。
参考来源 - 甲酸分解Pd/AC催化剂的制备与应用研究The flooding effect of ASP is studied in third class oil layer. The surfactant concentration of weak alkali ASP ranges from 0.0166% to 0.4% to reach ultra-low interfacial tension by laboratory evaluation of weak alkali ASP.
又探讨了三类油层的三元复合驱油效果,通过弱碱三元体系室内性能评价,确定了弱碱三元复合体系产生超低界面张力表面活性剂的浓度范围为0.0166%~0.4%、Na_2CO_3的浓度范围为0.4%~1.2%,并通过表面活性剂吸附量对界面张力的影响,确定了经过多次吸附后,石油磺酸盐弱碱三元复合体系仍然具有较低的界面张力。
参考来源 - 杏北油田萨尔图油层提高采收率技术研究·2,447,543篇论文数据,部分数据来源于NoteExpress
弱碱(吡啶,二甲基吡啶或可力丁)的存在将亚磷酸三酯氧化为四配位磷酸三酯。
The presence of a weak base (pyridine, lutidine, or collidine ) oxidizes the phosphite triester into a tetracoordinated phosphate triester.
但PH值的降低并不会使海水真的变成酸性(海水原属弱碱性)。
The declining pH does not actually make the waters acidic (they started off mildly alkaline).
疏花水柏枝适宜于亚热带气候下弱碱性、养分含量低的冲积性砂砾质初育土,能耐一定程度的盐分。
Myricaria laxiflora, on the other hand, prefers the alluvial soil with sand and gravel in subtropics climate. The soil is of weak alkalinity, has low content of nutrient but moderate salt.
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