METHOD FOR PRODUCING RECOVERED OIL COMPOSITION AND METHOD FOR PRODUCING RECOVERED INDUSTRIAL OIL COMPOSITION

WIPO Patent Application WO/2024/105947

A1

Provided is method for producing a recovered oil composition via a purification processing step for performing purification processing of a used industrial oil composition that has been used in machine lubrication or metalworking. Performed as the purification processing is adsorption processing, hydrodesulfurization processing, or reduced-pressure distillation processing. The industrial oil composition before use in the machine lubrication or the metalworking and the used industrial oil composition that has been used in the machine lubrication or the metalworking contain: as a base oil, a mineral oil (A1), a synthetic oil (A2), or a vegetable oil or derivative thereof (A3); as an oxidation inhibitor, a neutral phosphite ester derivative represented by formula (B) and a 2,6-di-t-butylphenol derivative represented by formula (C); and a functional additive. Compared to the industrial oil composition before use in the machine lubrication or the metalworking, the used industrial oil composition that has been used in the machine lubrication or the metalworking has a smaller content ratio of the functional additive.

AKAO YUJI (JP)

PCT/JP2023/029246

May 23, 2024

August 10, 2023

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CITIZEN WATCH CO LTD (JP)

C10M175/00; C10M141/10; C10M129/10; C10M133/40; C10M137/02; C10N40/02; C10N40/04; C10N40/20; C10N70/00

CN110317670A	2019-10-11
JP2015034205A	2015-02-19
US20150001062A1	2015-01-01
JP2013147611A	2013-08-01
US5661117A	1997-08-26
JPH06200285A	1994-07-19
JPS6289796A	1987-04-24

TORANOMON INTELLECTUAL PROPERTY FIRM (JP)

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