縮醛劑 的英文怎麼說
中文拼音 [suōquánjì]
縮醛劑
英文
acetalaing agent-
Catalytic synthesis of benzaldehyde glycol acetal with so2 - 4 tio2 - wo
3催化劑催化合成苯甲醛乙二醇縮醛Manufacturer of organic bromine compounds in india. products include alkyl, acetyl, and allyl bromides, bromo - aromatics, and ethylene dibromide, for use as intermediates in fine chemical and pharmaceutical manufacture
-提供紫外線吸收劑benzophenone系列和醫藥中間體：琥珀酸單乙脂酰氯羅紅側鏈二環乙基碳二亞胺溴乙醛縮二乙醇等的單位。Synthesis of butyraldehyde glycol acetal with h4siw12o40 pan as catalyst
硅鎢酸摻雜聚苯胺催化劑催化合成丁醛乙二醇縮醛This paper describes briefly the flavor materials being resistant to high temperature and having a long - lasting taste and odor, including acetals, long - lasting cooling agent, substituted fatty acid glyceride and glucoside
摘要本文簡單介紹了食用香料中的長效和耐高溫香料。它們包括縮醛類、長效涼味劑、取代脂肪酸甘油酯和糖苷等。A facile method for the preparation of 10 - arylmethylene anthrone is reported. when anthrone react with aryl aldehyde in the presence of pyridine by using xylene as the solvent, besides 10 - arylmethylene anthrone derivatives we found other oxygenated anthrone which have not been reported. physical methods shows that the oxygenated anthrone is anthraquinone, and the anthraquinone cannot be removed from the condensed products by recrystallization with solvents. an effective method of getting ride of anthraquinone is sublimation by heating
以蒽酮和芳香醛為原料，二甲苯為溶劑，吡啶催化法制取10 -芳香基甲叉基蒽酮.發現其生成物中除含有目標化合物10 -芳香基甲叉基蒽酮外，還含有部分文獻中沒有報道的蒽酮氧化物，經物理方法確定其為蒽醌.該化合物不能用溶劑重結晶的方法將其從縮合產物中除去，有效的分離方法是升華In this paper, 1, 1 - diacetate was synthesized from furfural and acetic anhydride by acidic bentonite friendly to environment as catalyst with excellent yield ( 87. 6 % )
摘要利用對環境友好的酸性皂土做催化劑，糠醛與乙酸酐發生縮合反應合成了1 ， 1 -二乙酸酯，產率高達86 . 6 % 。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The promotion action of ionic liquid as an accelerant in synthesizing benzaldehyde ethanediol acetal and benzaldehyde propanediol acetal was studied
摘要以離子液體為促進劑，強酸性聚苯乙烯732催化了苯甲醛與兩種二元醉的縮醛反應。The results showed that the properties and production mst of the panel could be designed by adjusting the compression ratio of the mat ; the properties of bamboobased waferboard with 1. 07 compression ratio and 4 % pf resin without any moisture - resistant agent were superior to those of wood - based one ; and the composite with excellent properties could be made with bamboo from species either for structure or for shoot, and from single species or mixed species as long as the wall thickness of bamboo was over 2 mm
試驗結果表明，通過調節壓縮比即可調節板材的性能和生產成本，壓縮比為1 . 0 、用膠量為4的不含防水劑的酚醛樹脂竹大片刨花板的各項性能可超過同類木質板材的性能單獨或混合以具必要竹壁厚度的材用或筍材兩用竹為原料均可獲得性能良好的竹大片刨花板。分享友人