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公开(公告)号：KR1020030093654A
公开(公告)日：2003-12-11
申请号：KR1020020031387
申请日：2002-06-04
Applicant: 한국과학기술연구원
CPC classification number: C07C51/235 , B01J27/188 , B01J37/031 , B01J38/68 , C07C51/252 , Y02P20/584 , C07C57/04
Abstract: PURPOSE: A preparation method of heteropoly acid catalyst useful in preparing methacrylic acid by gas phase oxidation of methacrolein is provided, and a method for preparing methacrylic acid using catalyst prepared by the method is provided. CONSTITUTION: The preparation method of heteropoly acid catalyst comprises the steps of recrystallizing the dissolved solution using reduced pressure or vacuum drying by dissolving heteropoly acid, heteropoly acid salt or a mixture thereof into a basic organic solvent; and heat treating the recrystallized material, wherein the heteropoly acid is one or more acids selected from 12-molybdophosphoric acid (H3PMo12O40), 12-tungstophosphoric acid (H3PW12O40), 12-silicotungstic acid (H4SiW12O40), 12-molybdotungstophosphoric acid (H3PMo12-xWxO40, x=0 to 12), 12-molybdovanadophosphoric acid (H3+xPMo12-xVxO40, x=0 to 12), 18-molybdovanadophosphoric acid (H6+xP2Mo18-xVxO62, x=0 to 18), and 18-tungsto niobium phosphoric acid (H6+xP2W18-xNbxO62, x=0 to 18), wherein a part or all of hydrogen ions of heteropoly acid in the heteropoly acid salt is substituted by one or more metallic atoms selected from groups 1A to 7A, groups 1B to 5B and group 8B on the periodic table, and wherein the basic solvent is one or more solvents selected from aniline, dimethylformamide, quinoline, tetrahydrofuran, dimethylacetamide, pyridine, dimethylsulfoxide, ethylamine, N-methylpyrrolidone and butylamine.
Abstract translation: 目的：提供可用于通过甲基丙烯醛气相氧化制备甲基丙烯酸的杂多酸催化剂的制备方法，并提供使用该方法制备的催化剂制备甲基丙烯酸的方法。 构成：杂多酸催化剂的制备方法包括将杂多酸，杂多酸盐或其混合物溶解在碱性有机溶剂中，通过减压或真空干燥使溶解溶液重结晶的步骤; 并且对所述重结晶材料进行热处理，其中所述杂多酸是选自12-钼磷酸（H3PMo12O40），12-钨磷酸（H3PW12O40），12-硅钨酸（H4SiW12O40），12-钼钨磷酸（H3PMo12-xWxO40）中的一种或多种酸 ，x = 0〜12），12-钼钒酸磷酸（H3 + xPMo12-xVxO40，x = 0〜12），18-钼钒钒酸（H6 + xP2Mo18-xVxO62，x = 0〜18）和18-钨铌磷 酸（H6 + xP2W18-xNbxO62，x = 0〜18），其中杂多酸盐中的杂多酸的氢离子的一部分或全部被一个或多个选自1A〜7A组，1B〜5B组的金属原子取代 和基团8B，其中碱性溶剂是选自苯胺，二甲基甲酰胺，喹啉，四氢呋喃，二甲基乙酰胺，吡啶，二甲基亚砜，乙胺，N-甲基吡咯烷酮和丁胺中的一种或多种溶剂。
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公开(公告)号：KR100477894B1
公开(公告)日：2005-03-18
申请号：KR1020020031387
申请日：2002-06-04
Applicant: 한국과학기술연구원
CPC classification number: C07C51/235 , B01J27/188 , B01J37/031 , B01J38/68 , C07C51/252 , Y02P20/584 , C07C57/04
Abstract: 본 발명은 헤테로폴리산 촉매의 제조방법과 이를 이용하는 메타크릴산의 제조방법에 관한 것으로, 더욱 상세하게는 헤테로폴리산 및/또는 그 염을 비공유 전자쌍을 함유하는 유기용매에 녹인 후 재결정하고 열처리하여 촉매를 제조함으로써, 헤테로폴리음이온의 전자적 특성변화를 유발시켜 산화환원반응성을 증가시키고 또한 용매의 전자주게적 특성(염기성)에 의해 헤테로폴리산이 지니는 고유한 산특성이 억제되기 때문에, 이를 메타크롤레인의 산화반응에 이용하여 고효율로 메타크릴산을 제조할 수 있는 헤테로폴리산 촉매의 제조방법과 이를 이용하는 메타크릴산의 제조방법에 관한 것이다.
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