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      catalyst
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  催化剂
    APPLICATION OF LD-412 SOLID ACID CATALYST IN THE ESTERIFICATION OF ACRYLIC ACID
    LD—412固体酸催化剂在丙烯酸酯化反应中的应用
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    DEVELOPMENT AND APPLICATION OF LATENT CATALYST FOR AMINO BAKING PAINTS
    氨基烘漆潜催化剂的研究和应用
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    YK-1 New Type Catalyst for Hydroge-nation of Oil and Fats
    YK-1新型油脂氢化催化剂
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    A STUDY ON THE SELECTIVE HYDROGEN CATALYST FOR LARD
    猪油选择性氢化催化剂的研究
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    STUDY ON HOMOGENEOUS CATALYST OF OIL ANDFAT AND TECHNOLOGY CONDITION OF HYDROGENATION
    油脂均相加氢催化剂的研制及氢化工艺条件的研究
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  催化
    The Synthesis of 0,0-Diisopropyl-S-Benzylthiophosphate by Phase Transfer Catalyst
    相转移催化合成○,○-二异丙基-S-苄基硫代磷酸酯
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    PREPARATION OF ISOBORNYL ACETATE FROM CAMPHENE WITH D72 RESIN IN FIXED BED AS CATALYST
    用D72树脂固定床催化莰烯制乙酸异龙脑酯
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    STUDIES ON SYSTHESIS OF FURFURYL CARBOXYLATES BY USING MODIFIED ZSM─5 AS CATALYST
    改性ZSM-5分子筛催化法合成糠醇酯的研究
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    The Synthesis of Furoin with V B1 as Catalyst
    V_(B1)催化合成糠偶姻的研究
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    THE STUDIES ON COUMARIN SYNTHESIS BY PHASE TRANSFER CATALYST
    相转移催化合成香豆素的研究
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  催化剂用量
    The results showed that the optimal conditions for synthesis of benzyl acetate were: the molar ratio of acetic acid to benzyl alcohol was 2∶1,the amount of the water carrier was 40%,the amount of the catalyst was 3.5%,and reaction time was 6 h.
    结果表明,乙酸苄酯最适宜的合成工艺条件为:酸醇摩尔比2∶1、催化剂用量3.5%(占总质量)、带水剂(苯)用量40%(占总质量)、反应时间6 h。
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    Isoamyl isovalerate was synthesized through esterification reaction by using isovaleric acid and isoamyl alcohol as raw materials and nano-H4SiW12O40/SiO2 as catalyst, the influencing factors in the reaction were studied, and the results showed that the esterification rate could reach 98.6 % under the conditions of the ratio of alcohol-acid 1.4∶1, the use level of catalyst 5 %, and the reaction time 1.5 h.
    以纳米复合钨硅杂多酸为催化剂,异戊酸和异戊醇为原料,通过酯化反应合成苹果油,对酯化反应的影响因素进行了研究,结果表明,在醇酸物质的量比为1.4∶1,催化剂用量5%,反应时间1.5h的条件下,酯化率可达98.6%。
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    Synthesis of isoamyl laurate from lauric acid and isoamyl alcohol with nanometer H3PW12O40 / SiO2 as catalyst is studied, the results showed that nanometer H3PW12O40/ SiO2 was a good catalyst for synthesizing isoamyl laurate, the oplimal conditions were found as follows: molar ratio of lauric acid to isoamyl alcohol was 1∶5, the weight of catalyst was 5%, the reaction time was 2h, yield was about 99.1%.
    以纳米型复合杂多酸H3PW12O40/SiO2为催化剂,月桂酸和异戊醇为原料,合成月桂酸异戊酯。 实验结果表明,纳米复合磷钨酸是合成月桂酸异戊酯的良好催化剂,适宜的工艺条件为酸醇物质的量比为1︰5、催化剂用量占酸质量的5%、回流反应时间为2h,酯化率可达99.1%。
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    The optimum reaction conditions were: the molar ratio of ethyl acetoacetate to ethylene glycol was 1:1.8,the quantity of catalyst was equal to 2% ethyl acetaoacetate,amount of cyclohexane was 20mL,and the reaction time was 3h.
    最佳反应条件为:n(乙酰乙酸乙酯):n(乙二醇)=1:1.8,催化剂用量为乙酰乙酸乙酯质量的2%,带水剂用量为20mL,反应时间3h。
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    The main process parameters were optimized by orthogonal test. The optimized operation conditions were: reaction temperature 100 ℃,reaction time 15 min,mole ration of β-naphthol to ethanol 1∶5.5,and the dosage of catalyst 2.5 g. Under these conditions,the yield of β-naphtyl ethyl ether was above 70%.
    用正交试验方法对主要影响因素进行了优化,得到的优化条件为:反应温度100℃,反应时间15 min,反应物摩尔比为β-萘乙醚∶乙醇=1∶5.5,催化剂用量2.0 g,在此优化条件下,合成产物收率可达70%以上。
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  “catalyst”译为未确定词的双语例句
    SYNTHESIS OF C_3-C_7 ALKYLMETH ACRYLATES BY ESTER EXCHANGE IN THE PRESENCE OF (MeO)_2 Mg CATALYST
    甲基丙烯酸C_3-C_7烷基酯的合成
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    Study on SO_4~(2-)/TiO_2 Catalyst Modified by Rare Earth for the Synthesis of Camphene
    稀土改性SO_4~(2-)/TiO_2对合成莰烯的催化作用研究
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    Synthesis of Isopentyl Propionate by using βZeolites as Catalyst
    改性β沸石合成丙酸异戊酯
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    Synthesis Process of Environmently Friendly Zirco Drier Catalyst
    环境友好型催干剂异辛酸锆的合成工艺
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    3, 7-Dimethy1-1, 6-octadiene (1) [Dihydromyrcene] reacts with formic acid in the presence of solid acid catalyst and gives a mixture of 1-(3, 3-dimethylcyclohexyl) ethyl formate (3) and 3,3,7-trimethylcycloheptyl formate(4).
    3,7-二甲基-1,6辛二烯(1)[二氢月桂烯]在固体酸作用下与甲酸发生环化水合反应,生成1-(3,3-二甲基环己基)乙醇甲酸(3)和3,3,7-三甲基环庚醇甲酸酯(4)的混合物(阿弗曼酯).
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  catalyst
       A new environmentally friendly catalyst, H4SiW12O40-polyaniline (PAn), was prepared, and n-butyraldehyde 1,2-propanediol acetal was synthesized from n-butyraldehyde and 1,2-propanediol in the presence of H4SiW12O40-PAn.
例句来源      
       The influence factors of the synthesis were discussed, and the best reaction conditions were found: the molar ratio of n-butyraldehyde to 1,2-propanediol is 1:1.5, the amount of catalyst used is 1.2% of feed stock, and the reaction time is 1.0 h.
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       H4SiW12O40-PAn is an excellent catalyst for synthesizing n-butyraldehyde 1,2-propanediol acetal, and the yield can reach more than 95.2%.
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       The partial intermediate products were absorbed on TiO2 surface, which resulted in catalyst deactivation.
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       But when it was irradiated under UV illumination or solar irradiation for some time, the catalyst could be reused without loss of catalytic activity.
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         A new method-chloroacetic acid method-for borneol synthesis was studied. The products obtained were in good quality containing more than 96% of borneol and no iso-borneol. High yield of borneol and good conversion rate of pinene have been observed at optimum temperature (70℃) in the presence of catalyst. Esterification can proceed steadily without danger of explosion which is the drawback of oxalic acid method.
            作者研制成功了一种合成龙脑的新方法——氯乙酸法。此法所得产品质量很好,其中正龙脑含量通常在96%以上,而不含异龙脑。试验证明,在适当的温度(70℃)和催化剂存在下,正龙脑得率很高,蒎烯转化率较高。酯化反应能在稳定条件下操作,不会发生爆炸事故,克服了草酸法的缺点。本文论述了氯乙酸法的工艺过程,并对其反应条件、小型试验放大和模拟扩大试验的结果等,进行了讨论。
文摘来源
         This paper deals with the polymerization process of high softening point terpene resin. Through laboratory experiments, a complex catalytic system has been selected and suitable reaction conditions determined, providing some reliable data for further industrial testing. With rich superfine turpentine from Pinus massoniana as raw material and methylbenzene as reaction solvent, terpene resins (Softening point>110) in light colour (Gardner's color< 6 ) can be obtained by cationic polymerization in the temperat...
            本文探讨了制造高软化点萜烯树脂的聚合工艺。通过实验室试验,选择出较理想的复合催化剂体系,确定了适宜的聚合工艺条件,为中试提供了可靠依据。以马尾松优级松节油为原料,无水A1C1_3。作主催化剂,另加适量共催化剂,甲苯为溶剂,在温度0~-15℃范围内进行阳离子催化聚合,再经水解、过滤、水洗、蒸馏等工序,可得软化点110℃以上浅色(加特纳色级≤6)萜烯树脂。固体树脂得率可达70%以上(以原料松节油重量计)。
文摘来源
         This paper reports the PTC synthetic method of Phthalic anhydride of bis(3-ch1oro-2-hydroxypropyl) ester Using the quarternary ammonium salt as a catalyst the product is directly synthesized form phthalic anhydrid, water and epoxy chloropropane, with an esterification yield more then 95%. The paper studies the effects on the yield of the various factors e. g. reaction temperature, time, catalyst rate, etc.
            本文介绍用转移催化合成邻苯二甲酸双-(-3-氢-2-羟丙基)酯的方法。以季铵盐为催化剂,直接用苯酐为原料和水、环氧氯丙烷作用制得。酯的收率达95%以上。文中研究了反应温度、时间、催化剂用量等因素对收率的影响。
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