公开(公告)号：US5681790A

公开(公告)日：1997-10-28

申请号：US565712

申请日：1995-11-30

申请人： Young Chul Kim ,  Ki Hwa Lee ,  Eun Hee Jin

发明人： Young Chul Kim ,  Ki Hwa Lee ,  Eun Hee Jin

IPC分类号： B01J31/36 ,  B01J27/199 ,  B01J31/02 ,  C07B61/00 ,  C07C51/235 ,  C07C57/055 ,  C07C211/65 ,  B01J31/00

CPC分类号： B01J23/002 ,  B01J27/199 ,  B01J31/0239 ,  B01J31/0254 ,  C07C211/65 ,  B01J2231/70 ,  B01J2231/76 ,  B01J2523/00

摘要： This invention relates to a novel catalyst for preparing methacrylic acid by gas phase oxidation of methacrolein obtained by gas phase catalytic oxidation of isobutylene or t-butanol. The catalyst is represented by the formula: P.sub.a Mo.sub.11 V.sub.b Du.sub.c X.sub.d Q.sub.e Z.sub.f O.sub.g wherein X is at least one of potassium, rubium, cessium, and thallium; Z is at least one of lead, antimony, chromium, iron, bismuth, cerium, and zinc; Q is at least one of organic quaternary ammonium cations consisting of ##STR1## in which R, R.sub.1, R.sub.2, R.sub.3 and R.sub.4 are each independently selected from the group consisting of C.sub.1 -C.sub.5 alkyl or C.sub.1 -C.sub.5 substituted alkyl having functional groups; a is a number from 0.8 to 1.6; b is a number from 0.6 to 2; c is a number from 0.1 to 0.8; d is a number from 0.7 to 2.2; e is a number from 0.01 to 0.1; f is a number from 0 to 0.5; and g is a number of oxygens required to satisfy the valence requirements of the other elements present.

摘要翻译： 本发明涉及一种用于通过气相氧化异丁烯或异丁烯通过气相催化氧化获得的甲基丙烯醛来制备甲基丙烯酸的新型催化剂。 该催化剂由下式表示：其中X是钾，铷，铯和铊中的至少一种：PaMo11VbDucXdQeZfOg; Z是铅，锑，铬，铁，铋，铈和锌中的至少一种; Q是由以下组成的至少一种有机季铵阳离子：其中R，R 1，R 2，R 3和R 4各自独立地选自具有官能团的C 1 -C 5烷基或C 1 -C 5取代的烷基; a是从0.8到1.6的数字; b是从0.6到2的数字; c为0.1〜0.8的数; d是从0.7到2.2的数字; e为0.01〜0.1的数; f是从0到0.5的数字; 并且g是满足其它元素的化合价要求所需的数量的氧。