FIELD: superhard materials. SUBSTANCE: tool waste containing diamond and/or cubic boron nitride are treated with composition consisting of the following components, wt.-%: addition forming chelate compound with aluminium 5-25; antioxidant addition 1-5; eutectic melt of alkaline metal hydroxides - up to 100 in muffle oven at 200-250 C. Product is cooled, leached, washed out with water, separated and dried. Extraction degree of diamond and/or cubic boron nitride is 96%. Washings have alkaline metal aluminates and can be used as coagulants. Invention can be used for recuperation of superhard materials. EFFECT: improved quality of composition. 4 cl, 3 ex
| Title | Year | Author | Number |
|---|---|---|---|
| METHOD OF REMOVING ALUMINUM OXIDE | 0 |
|
SU1721018A1 |
| METHOD OF RECOVERY OF ALUMINUM OXIDE | 0 |
|
SU1713887A1 |
| METHOD OF PRODUCING GRAPHITE BORON NITRIDE | 1998 |
|
RU2130336C1 |
| METHOD OF PREPARING GRAPHITE-LIKE BORON NITRIDE | 1999 |
|
RU2163562C1 |
| METHOD OF PREPARING METAL NITRIDE | 1995 |
|
RU2083487C1 |
| METHOD OF PRODUCING ALUMINIUM NITRIDE | 1996 |
|
RU2091300C1 |
| METHOD FOR PRODUCTION OF METAL NITRIDE | 1994 |
|
RU2061653C1 |
| METHOD OF PREPARING TUNGSTEN CARBIDE AND TUNGSTEN CARBIDE PREPARED BY THIS METHOD | 2001 |
|
RU2200128C2 |
| CHARGE FOR PRODUCING CAST REFRACTORY NON-ORGANIC MATERIAL IN BURNING MODE | 1992 |
|
RU2016111C1 |
| METHOD OF PREPARING OF SIALONE POWDER | 1990 |
|
RU1774612C |
