▎ 摘　　要

NOVELTY - A filter core comprises 60-90 pts. wt. modified vegetable fiber, 10-20 pts. wt. modified sawdust, 8-15 pts. wt. diatomaceous earth, 5-10 pts. wt. binder, 4-8 pts. wt. molecular sieve, 4-6 pts. wt. graphene oxide solution, and 0.5-1 pt. wt. antirust agent. USE - The filter core is useful in filter (claimed) used for processing spent oil including hydraulic oil, gear oil, lubricating oil, turbine lubricating oil, honing oil and roll oil. ADVANTAGE - The filter core: removes particles, water and degradation product (oxidized resin/sludge and varnish); occupies small floor area; saves energy and electricity, with lower operation and maintenance cost; has maximum service life; saves the cost of oil treatment and new oil; and provides treated oil, which can be used again.