[化學] 縮合反應
The results showed that gas formation and condensation reaction can be inhibited to some extent.
結果表明，超臨界溶劑中進行重油熱解可抑制氣體的生成和縮合反應的進行。
The catalytic activity of ZSM-5 zeolites prepared is stu***d with the aldehyde-ammonia condensation reaction.
利用ZSM-5沸石分子篩催化醛氨縮合反應對所合成産物進行了催化性能研究。
Conclusion:Acetic acid is an important catalyst in the condensation reaction. Schiff bases had antibacterial activity.
結論：乙酸是催化劑，對縮合反應有利，希夫堿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縮合反應制取雙酚酸。
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.
用尿素和澱粉為原料，以澱粉的水解産物與尿素進行縮合反應， 合成出一種新型的膠粘劑。
In the condensation reaction, a phase transfer catalyst was used. The optimum experimental condition was obtained by using orthogonal experimental design.
在縮合反應中使用相轉移催化劑，通過正交試驗找到了最佳反應條件；
Hydroxyl-terminated polylactic acid has been synthesized in an acid-alcohol condensation reaction with eliminating the water by co-boiling.
采用共沸除水與醇酸縮合反應相結合的方法合成端羟基聚乳酸。
The induction period for the condensation reaction was shortened.
反應的“誘導期”縮短了；
The conventional method was by the condensation reaction of formaldehyde and polyvinyl alcohol.
常規的制備方法是通過甲醛和聚乙烯醇的縮合反應來實現的。
Aldehyde-ammonia condensation reaction is one of the typical routes to manufacture alkyl pyridine.
醛氨縮合反應是制備烷基吡啶最具代表性的反應路線之一。
This reaction accorded with the proton condensation reaction mechanism and the first order reaction.
該合成反應符合質子化縮合反應機理和一級反應動力學特征。
The condition of condensation reaction such as solvent, ratio of reactants, temperature, time and quality of reactants were stu***d.
系統地研究了縮合反應的條件，如介質、時間、溫度、配比、原料質量對産率的影響；
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，芳香醛與氰************發生羰基與活性*********的縮合反應，高收率地得到縮合産物，且隻得到E式産物．。
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 .
在尿素與甲醛加成-縮合反應中，分2次加入自制PQ複合添加劑，可明顯降低遊離甲醛的含量，提高脲醛樹脂膠粘劑（UF膠）的穩定性。
With triethylamine as catalyst, 2,2-dihydroxymethylbutanal(DMB) was synthesized with formaldehyde and butyraldehyde taking place aldol condensation reaction.
以甲醛和*********為原料，在堿性催化劑的存在下通過羟醛縮合反應，合成了中間産物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.
探讨了成酐和堿性試劑，反應溫度，甘氨酸和天冬氨酸羧基保護等對縮合反應的影響。
The liquid-phase condensation reaction kinetics of isophorone synthesis was investigated by using acetone as raw materials.
研究以丙酮為原料液相法合成異佛爾酮的液相縮合反應動力學。
Quantum chemistry is applied to study condensation reaction mechanism of propionate acid and aniline.
用量子化學方法研究了丙酸與苯胺縮合反應機理。
Kinetic behavior of condensation reaction of acetone and glycerol was experimentally stu***d.
本文研究了甘油丙酮縮合反應過程的動力學性質。
With weakening of competitive adsorption behavior, the rate of dehydro-condensation reaction decreased , and hydrogen transfer reaction was obviously strengthened.
隨着競争吸附效應的減弱，脫氫縮合反應比例下降，氫轉移反應顯著加強。
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.
由乙酰丙酸酯類化合物與乙二醇進行縮合反應，得到相應的環狀縮酮化合物，産率分别為74 % ，75 %和75 ，其結構為紅外光譜所證實。
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.
傳統上，苯偶姻通過使用劇毒的*********或氰化鉀催化安息香縮合反應而得，所以苯偶姻的簡單高效和對環境無污染的制備方法很有意義。
It was deduced from FTIR that the condensation reaction was caused by a reaction of ketone group with anhydride.
根據FTIR測定結果，推測在反應中可能發生酮與酸酐的縮合反應。
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縮合反應中，鹽酸既作為催化劑又作為溶劑，且母液循環使用兩次時，MDC的收率為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.
研究結果表明，無氧和酸催化的反應條件對縮合反應是至關重要的。
Accompanying with condensation reaction, the degree of oxidizing degradation was little when low alkali dosage was used.
低用堿量時，木質素氧化降解少，并伴有縮合反應；
縮合反應（Condensation Reaction） 是指兩個或多個有機分子通過共價鍵結合，同時釋放出一個小分子副産物（如水、醇、氨或氯化氫等）的化學反應。該反應是構建複雜有機分子（尤其是生物大分子和高分子聚合物）的關鍵途徑，具有重要的理論和應用價值。
脫水縮合：最常見的類型，反應中脫去水分子（H₂O）。例如：
脫醇縮合：如矽烷偶聯劑反應中脫去醇類（如甲醇）： $$ ce{Si(OR)4 + R'OH -> Si(OR)3OR' + ROH} $$
可逆性：多數縮合反應可逆，副産物重新參與反應可能導緻水解（如酯的水解）。
在生物體内，縮合反應是代謝途徑的核心：
權威參考來源：
以下基于化學常識對“condensation reaction”（縮合反應）進行解釋：
定義 縮合反應是指兩個或多個有機分子通過官能團結合，同時釋放小分子（如水、氯化氫、醇等）的化學反應。其通式可表示為： $$ A–X + B–Y rightarrow A–B + X–Y $$
主要類型
生物意義
工業應用 用于合成高分子材料（如聚酯纖維、尼龍）、藥物中間體及香料化合物。
與加成反應區别 縮合反應會産生小分子副産物，而加成反應無副産物生成（如乙烯加聚成聚乙烯）。
如需具體反應機理或更多案例，建議補充說明應用場景。
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