| 摘要 |
<p>Industrial washing of linen is effected using a system of surfactants derived from a liq. concentrate comprising (a) 5-15 (wt)% of a fatty acid soap having fatty acid mol.wt. of 210-280, the fatty acids contg. not more than 50% acids with a single unsatn., and the soap being in the form of alkali metal salts of which at least 50%, on molar basis, are K salt; (b) 5-15% alkali metal alkyl(10-13C) benzene sulphonate as surfactant derived by sulphonation with SO3 gas of the corresponding alkyl-benzene at least 50% of the alkali metal, on molar basis, being K, the rest being pref. Na, and (c) 12-35 wt.% of an ethoxylated aliphatic alcohol of 12-15C, pref. a non-linear alcohol of which 12-20 wt.% contains 3-8 moles condensed ethylene oxide and 0-15 wt.% contains 9-13 moles condensed ethylene oxide. The concentrate contains at least 85%, on molar basis, of another alkali metal, pref. Na. The concentrate is used in conjunction with a liquid detergent auxiliary in ratios which can be adjusted to wash very dirty and greasy clothes. For example, less greasy linen (e.g hospital linen) requires a ratio of 1:2 to 1:4 whereas restaurant linen requires a ratio of 1:1.5-1:3.</p> |
