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21.发明授权
公开(公告)号：US3134824A
公开(公告)日：1964-05-26
申请号：US11728061
申请日：1961-06-15
Applicant: PHILLIPS PETROLEUM CO
Inventor： WALKER DARRELL W , CZENKUSCH EDWARD L
CPC classification number: B01J31/1616 , B01J21/12 , B01J31/2295 , B01J2531/847 , C07C2/34 , C07C2521/02 , C07C2521/04 , C07C2521/06 , C07C2521/08 , C07C2523/12 , C07C2531/22
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