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Handbook of Solvents - George Wypych - ChemTech - Ventech!

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1548 Isao Kimura<br />

22.2.4 SOLVENT RECOVERY FROM HAZARDOUS WASTES<br />

Table 22.2.4. Properties <strong>of</strong><br />

cycloparaffins as a cleaning solvent<br />

Property Value<br />

Appearance transparent<br />

Color (Seibolt) +30<br />

Specific gravity 0.839<br />

Viscosity, 40°C Cst 1.6<br />

Flash point, °C 76<br />

Aniline point 58<br />

Cycloparaffins content, % 80<br />

Alkylbenzene content, % 10<br />

Aromatics content, % 1<br />

The process was previously used for<br />

chlorine compounds represented by<br />

perchloroethylene and trichloroethylene<br />

and for fluorine compounds used<br />

for cleaning <strong>of</strong> press stamped metal<br />

parts. However, these compounds are<br />

now prohibited for use and production<br />

by environmental regulations. The<br />

current replacements include emulsions,<br />

organic and inorganic solutions,<br />

etc. Cycloparaffins originating<br />

from petroleum products were quali-<br />

Table 22.2.5. Cleaning performance <strong>of</strong> solvents<br />

Cleaning solvent Oils Residual oil, mg/cm 2<br />

cycloparaffins<br />

trichloroethane<br />

Figure 22.2.7. Metal parts cleaning employing cycloparaffins.<br />

press oil<br />

fan press oil<br />

bender oil<br />

press oil<br />

fan press oil<br />

bender oil<br />

0.0017<br />

0.0015<br />

0.0017<br />

0.0021<br />

0.0013<br />

0.0013<br />

Figure 22.2.6. Vapor pressure and combustion range <strong>of</strong><br />

cycloparaffins.

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