Method of reproducing water-soluble cutting agents
AssigneesNissan Motor Co., Ltd., Maruchi Kohken Co., Ltd.
InventorsMasami Hasegawa, Utaro Sakai, Takahisa Naitoh
Life of this patent
Estimating the term…
Abstract
A method of recycling and purifying water-soluble cutting agents is disclosed. The used water-soluble cutting agent is recycled by filtering through an oil-water separating filter consisting of a porous sheet and an oil-water separating layer composed essentially of a water-insoluble and water absorbable gel layer, which is formed on a surface portion of the porous sheet and is adapted to be contacted with the cutting agent and/or surface portions of the porous sheet serving as flow path.
Claims9
A method of recycling and purifying an aqueous solution of a water-soluble cutting agent, comprising the step of filtering a used solution of water-soluble cutting agent containing water, a water-soluble cutting agent and an oil contaminant through an oil-water separating filter, said oil-water separating filter comprising a porous sheet having thereon an oil-water separating layer, said layer consisting essentially of a water-insoluble and water-absorbing gel layer having both an oil-resistant and oil-repellent function and a water-permeable and water-absorbing function, said layer being formed on the portion of said porous sheet which is contacted by said cutting agent.
Dependencies are inferred from the claim text.