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公开(公告)号：US2978520A
公开(公告)日：1961-04-04
申请号：US74212158
申请日：1958-06-16
Applicant: PURE OIL CO
Inventor： BLUM EDMUND D , HUTCHINGS LE ROI E
IPC: C10G21/20
CPC classification number: C10G21/20 , Y10S585/901
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2.发明授权Process for recovering alkaline earth metal sulfates in manufacturing alkaline earthmetal sulfonates 失效在制造碱土金属磺酸盐时回收碱土金属硫酸盐的方法
公开(公告)号：US3033649A
公开(公告)日：1962-05-08
申请号：US81804059
申请日：1959-06-04
Applicant: PURE OIL CO
Inventor： BLUM EDMUND D , HUTCHINGS LE ROI E
IPC: C01F11/46
CPC classification number: C01F11/462
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