Acetaminophen → Propylene Glycol

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The nonionic detergents include those described at length in McCutcheon's Detergents and Emulsifiers, 1973 Annual and in Surface Active Agents, Vol. II, by Schwartz, Perry and Berch (Interscience Publishers, 1958), the descriptions of which are hereby incorporated by reference. Such nonionic detergents are usually pasty or waxy solids at room temperature (20° C.) which are either sufficiently water soluble to dissolve promptly in water or will quickly melt at the temperature of the wash water, as when that temperature is above 40° C. The nonionic detergents employed will normally be those which are liquid or pasty at room temperature but preference will be given to normally pasty or semi-solid products because such are less liable to make a tacky product of poor flow properties and susceptibility toward lumping or setting on storage. Also they are less liable to weep and release their "holds" on the zeolites. Still, normally liquid nonionic detergents may be employed and nonionic detergents used will be liquefiable so that they may be sprayed at reasonable temperatures, such as those below 45°, 50° or 60° C. Typical useful nonionic detergents are the poly-(lower alkenoxy) derivatives that are usually prepared by the condensation of lower (2 to 4 carbon atoms) alkylene oxide, e.g., ethylene oxide, propylene oxide (with enough ethylene oxide to made a water soluble product), with a compound having a hydrophobic hydrocarbon chain and containing one or more active hydrogen atoms, such as higher alkyl phenols, higher fatty acids, higher fatty mercaptans, higher fatty amines and higher fatty polyols and alcohols, e.g., fatty alcohols having 8 to 20 or 10 to 18 carbon atoms in an alkyl chain and alkoxylated with an average of about 3 to 30, preferably 3 to 15 or 6 to 12 lower alkylene oxide units. Preferred nonionic surfactants are those represented by the formula RO(C2H4O)nH, wherein R is the residue of a linear saturated primary alcohol (an alkyl) of 10 to 12 to 18 carbon atoms and n is an integer from 3 or 6 to 15. Typical commercial nonionic surface active agents suitable for use in the invention include Neodol® 45-11, which is an ethoxylation product (having an average of about 11 ethylene oxide units) of a 14 to 15 carbon atoms (average) chain fatty alcohol (made by Shell Chemical Company); Neodol 25-7, a 12 to 15 carbon atom chain fatty alcohol ethoxylated with an average of 7 ethylene oxide units; and Alfonic® 1618-65, which is a 16 to 18 carbon alkanol ethoxylated with an average of 10 to 11 ethylene oxide units (Continental Oil Company). Also useful are the Igepals® of GAF Co., Inc. Such materials are usually the polyethoxylated (3 to 30 ethylene oxide units) middle alkyl (6 to 10 carbon atoms) phenols, such as Igepals CA-630, CA-730 and CO-630. The Pluronics® (made by BASF-Wyandotte), such as Pluronic F-68 and F-127, which are condensates of ethylene oxide with hydrophobic bases formed by condensing propylene oxide with propylene glycol, usually having molecular weights in the range of 5,000 to 25,000, may also be employed, as may be the various Tweens® (products of ICI America), which are polyoxyethylene sorbitan higher fatty acid (12 to 18 carbon atoms) esters, such as those containing solubilizing quantities of ethylene oxide therein. Various other nonionic detergents described in the texts previously incorporated by reference may also be employed but preferably the proportion of nonionic detergent or surface active agent present, when other than the higher fatty alcohol polyoxyethylene ethanols, will be a minor one, rarely being more than 50% and preferably no more than 25% of the total nonionic detergent content. In the above description higher, as in higher alkyl, higher fatty, etc., means from 8 to 20, preferably from 10 or 12 to 18.

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