With­in the pro­ject a pro­cess has been de­vel­oped for clean­ing of in­dus­tri­al parts on the basis of shock waves, ionic liq­uids and fur­ther ad­di­tives in com­pressed car­bon diox­ide. The use of ionic liq­uids and other clean­ing ad­di­tives as well as shock or pres­sure waves was in­ves­ti­gat­ed. On film-like un­po­lar soils a good clean­ing ef­fi­cien­cy was shown by pure com­pressed car­bon diox­ide. With a mod­i­fied spray clean­ing sys­tem in com­bi­na­tion with small amounts of ethanol as an ad­di­tive an ef­fec­tive re­moval of film-like polar soils was ob­tained. Sim­i­lar re­sults were achieved with this sys­tem for par­tic­u­late film-like polar soil com­bi­na­tions. The re­moval of saline soils was only par­tial­ly pos­si­ble. How­ev­er, it is like­ly that with the ad­di­tion of in­creased amounts of water saline soils could also be re­moved. With the new pro­cess com­bi­na­tions of polar, non­po­lar and par­tic­u­late soils can be re­moved more ef­fec­tive­ly than with pre­vi­ous meth­ods.

The research report is available on request from FRT.