condensation catalyst 中文意思是什麼

condensation catalyst 解釋
縮合催化劑
  • condensation : n. 1. 濃縮；【物理學】冷凝（作用），凝聚（作用）；壓縮；縮合；凝塊。2. （著作等的）壓縮；壓縮后的形式，節本。
  • catalyst : n. 【化學】觸媒，催化劑，接觸劑〈又作 catalytic agent〉；〈比喻〉觸發因素，〈口語〉（善用熱情、言語等打動他人的）有感染力的人。
  1. Isopropylidene glycerol is prepared by condensation of acetone with glycerol, thereafter it was esterified with octanoyl chloride in pyridine as catalyst, and finally the latter was decomposed with boric acid

    摘要以甘油和丙酮為原料制得異丙叉甘油，其與辛酰氯在吡啶催化下酯化，再經硼酸作用下分解得到單辛酸甘油酯。
  2. Polylactic acid ( pla ) of different molecular weights were synthesized by the direct condensation of lactic acid with modified gneiss as the catalyst, or with modified gneiss and stannous caprylate as the catalyst in the same reaction conditions and different reaction times

    摘要以天然礦石改性片麻巖為聚合反應的催化劑，通過直接縮聚方法制備了不同分子量的聚乳酸。
  3. The condensation of aromatic aldhydes with hydroxylamine hydrochloride in aqueous solution under ultrasound irradiation results oximes in 72 % ~ 98 % yields without catalyst

    摘要在沒有催化劑條件下，芳香醛與鹽酸羥胺的水溶液經超聲輻射于室溫反應，可以72 % ~ 98 %收率得到肟。
  4. The traditional catalyst used in acetal ( ketal ) synthetic reaction is strong inorganic acid. but there is some limits to its use because of its side reaction, strong erosion and liability to pollute the environment. molybdophosphoric acid is used as catalyst and three condensation products are prepared through the direct reaction of aldehydes ( ketones ) and ethylene. in addition, several elements of affecting the reaction is researched. it is proved that molybdophosphoric acid is very active as catalyst in less addition, the product yield is quite high and the quality of reuse is quite good

    縮醛（酮）合成反應的傳統催化劑為無機強酸，但由於副反應多、腐蝕性強和易污染環境等缺點，其使用受到限制.用磷鉬酸為催化劑，通過醛（酮）與乙二醇直接反應得到了三種縮合產物.對影響反應的諸因素進行研究，結果表明，用磷鉬酸作催化劑，用量小，活性高，產品收率較高，且重復使用性能較好
  5. Abstract : the traditional catalyst used in acetal ( ketal ) synthetic reaction is strong inorganic acid. but there is some limits to its use because of its side reaction, strong erosion and liability to pollute the environment. molybdophosphoric acid is used as catalyst and three condensation products are prepared through the direct reaction of aldehydes ( ketones ) and ethylene. in addition, several elements of affecting the reaction is researched. it is proved that molybdophosphoric acid is very active as catalyst in less addition, the product yield is quite high and the quality of reuse is quite good

    文摘:縮醛（酮）合成反應的傳統催化劑為無機強酸，但由於副反應多、腐蝕性強和易污染環境等缺點，其使用受到限制.用磷鉬酸為催化劑，通過醛（酮）與乙二醇直接反應得到了三種縮合產物.對影響反應的諸因素進行研究，結果表明，用磷鉬酸作催化劑，用量小，活性高，產品收率較高，且重復使用性能較好
  6. Comparing among the adoption of condensation, supercondensation and high - effective catalyst technologies with the present status in china, this paper presents the conclusion of study the condensation tech is superior to the high - effective catalyst tech in revamping / expansion of gas - phase polyethylene plant, while the super - condensation tech should be further studied and developed before it can be applied in china

    摘要本文通過對冷凝、超冷凝及高效催化劑等技術分析比較，結合目前國內實際情況，闡明?在國內氣相法聚乙烯裝置擴能改造中應首選冷凝技術，其次是高效催化劑技術，而超冷凝技術還有待于進一步完善，目前不宜採用。
  7. Application : mainly used as catalyst for poly - condensation of polyester. improved poly - condensation time especially in continuous processes. significantly reduced impurity levels in pet resin

    用途：主要用作聚酯縮聚催化劑，比三氧化二銻易溶於乙二醇中，具有活性高，不易堵塞管道，縮聚時間短，能提高聚酯產品的質量等特點。
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