[化学] 缩合反应
The results showed that gas formation and condensation reaction can be inhibited to some extent.
结果表明，超临界溶剂中进行重油热解可抑制气体的生成和缩合反应的进行。
The catalytic activity of ZSM-5 zeolites prepared is stu***d with the aldehyde-ammonia condensation reaction.
利用ZSM-5沸石分子筛催化醛氨缩合反应对所合成产物进行了催化性能研究。
Conclusion:Acetic acid is an important catalyst in the condensation reaction. Schiff bases had antibacterial activity.
结论：乙酸是催化剂，对缩合反应有利，希夫碱化合物具有一定抗菌活性。
In this paper, the progress on diphenolic acid preparation by condensation reaction of levulinic acid and phenol is introduced.
利用乙酰丙酸和苯酚缩合反应制取双酚酸。
A new kind of adhesive has been synthesized from starch and urea through condensation reaction. The process was ****** with less environmental pollution and less corrosion.
用尿素和淀粉为原料，以淀粉的水解产物与尿素进行缩合反应， 合成出一种新型的胶粘剂。
In the condensation reaction, a phase transfer catalyst was used. The optimum experimental condition was obtained by using orthogonal experimental design.
在缩合反应中使用相转移催化剂，通过正交试验找到了最佳反应条件；
Hydroxyl-terminated polylactic acid has been synthesized in an acid-alcohol condensation reaction with eliminating the water by co-boiling.
采用共沸除水与醇酸缩合反应相结合的方法合成端羟基聚乳酸。
The induction period for the condensation reaction was shortened.
反应的“诱导期”缩短了；
The conventional method was by the condensation reaction of formaldehyde and polyvinyl alcohol.
常规的制备方法是通过甲醛和聚乙烯醇的缩合反应来实现的。
Aldehyde-ammonia condensation reaction is one of the typical routes to manufacture alkyl pyridine.
醛氨缩合反应是制备烷基吡啶最具代表性的反应路线之一。
This reaction accorded with the proton condensation reaction mechanism and the first order reaction.
该合成反应符合质子化缩合反应机理和一级反应动力学特征。
The condition of condensation reaction such as solvent, ratio of reactants, temperature, time and quality of reactants were stu***d.
系统地研究了缩合反应的条件，如介质、时间、温度、配比、原料质量对产率的影响；
The carbonyl methylene condensation reaction of aromatic aldehydes with ethyl cyanoacetate has been carried out smoothly in the presence of potassium fluoride only giving E isomers in high yield.
在*********催化下，芳香醛与氰************发生羰基与活性*********的缩合反应，高收率地得到缩合产物，且只得到E式产物．。
Adding the PQ additive with 2 times, to the addition condensation reaction of urea with formaldehyde, can reduce the content of free CH 2O and increase stability of UF resin adhesive .
在尿素与甲醛加成-缩合反应中，分2次加入自制PQ复合添加剂，可明显降低游离甲醛的含量，提高脲醛树脂胶粘剂（UF胶）的稳定性。
With triethylamine as catalyst, 2,2-dihydroxymethylbutanal(DMB) was synthesized with formaldehyde and butyraldehyde taking place aldol condensation reaction.
以甲醛和*********为原料，在碱性催化剂的存在下通过羟醛缩合反应，合成了中间产物2，2-二羟*********醛。
The influencing factors of condensation reaction were investigated such as anhydrides, base agent, temperature, carboxyl group protected of Gly and Asp.
探讨了成酐和碱性试剂，反应温度，甘氨酸和天冬氨酸羧基保护等对缩合反应的影响。
The liquid-phase condensation reaction kinetics of isophorone synthesis was investigated by using acetone as raw materials.
研究以丙酮为原料液相法合成异佛尔酮的液相缩合反应动力学。
Quantum chemistry is applied to study condensation reaction mechanism of propionate acid and aniline.
用量子化学方法研究了丙酸与苯胺缩合反应机理。
Kinetic behavior of condensation reaction of acetone and glycerol was experimentally stu***d.
本文研究了甘油丙酮缩合反应过程的动力学性质。
With weakening of competitive adsorption behavior, the rate of dehydro-condensation reaction decreased , and hydrogen transfer reaction was obviously strengthened.
随着竞争吸附效应的减弱，脱氢缩合反应比例下降，氢转移反应显著加强。
The condensation reaction of levulinates with ethylene glycol brings about corresponding ketal, with respective productivity of 74%, 75% and 75%, and respective structure being verified by IRS.
由乙酰丙酸酯类化合物与乙二醇进行缩合反应，得到相应的环状缩酮化合物，产率分别为74 % ，75 %和75 ，其结构为红外光谱所证实。
Benzoin condensation reaction is usually promoted by toxic cyanide ion, so the development of more convenient and efficient synthetic methods, which is environmental benign, is highly desired.
传统上，苯偶姻通过使用剧毒的*********或氰化钾催化安息香缩合反应而得，所以苯偶姻的简单高效和对环境无污染的制备方法很有意义。
It was deduced from FTIR that the condensation reaction was caused by a reaction of ketone group with anhydride.
根据FTIR测定结果，推测在反应中可能发生酮与酸酐的缩合反应。
As for the condensation reaction, hydrochloride acid was used both as solvent for MPC and as catalyst, and MDC yield was 78.4% under recycling the reaction solution twice.
在MPC缩合反应中，盐酸既作为催化剂又作为溶剂，且母液循环使用两次时，MDC的收率为78.4 %；
It was found that the reaction conditions, particularly the presence of acid and the absence of oxygen, were critical for the condensation reaction.
研究结果表明，无氧和酸催化的反应条件对缩合反应是至关重要的。
Accompanying with condensation reaction, the degree of oxidizing degradation was little when low alkali dosage was used.
低用碱量时，木质素氧化降解少，并伴有缩合反应；
缩合反应（Condensation Reaction） 是指两个或多个有机分子通过共价键结合，同时释放出一个小分子副产物（如水、醇、氨或氯化氢等）的化学反应。该反应是构建复杂有机分子（尤其是生物大分子和高分子聚合物）的关键途径，具有重要的理论和应用价值。
脱水缩合：最常见的类型，反应中脱去水分子（H₂O）。例如：
脱醇缩合：如硅烷偶联剂反应中脱去醇类（如甲醇）： $$ ce{Si(OR)4 + R'OH -> Si(OR)3OR' + ROH} $$
可逆性：多数缩合反应可逆，副产物重新参与反应可能导致水解（如酯的水解）。
在生物体内，缩合反应是代谢途径的核心：
权威参考来源：
以下基于化学常识对“condensation reaction”（缩合反应）进行解释：
定义 缩合反应是指两个或多个有机分子通过官能团结合，同时释放小分子（如水、氯化氢、醇等）的化学反应。其通式可表示为： $$ A–X + B–Y rightarrow A–B + X–Y $$
主要类型
生物意义
工业应用 用于合成高分子材料（如聚酯纤维、尼龙）、药物中间体及香料化合物。
与加成反应区别 缩合反应会产生小分子副产物，而加成反应无副产物生成（如乙烯加聚成聚乙烯）。
如需具体反应机理或更多案例，建议补充说明应用场景。
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