There is no age limit beyond which liposuction would not be safe or effective in removing fat...
On the other hand, as the goal is not usually just to remove fat, but to have the patient achieve a better appearance, the changes in your skin and body that are related to the aging process may indicate that you are better off with an alternative option.
The only way to know would be to see you for a consultation and an examination.
A word of caution- there are now a great many "practitioners" claiming expertise in liposuction, and injuries and deaths are mounting. In the right hands, liposuction should be among the safest procedures we do- be sure your surgeon is Certified by The American Board of Plastic Surgery.