Fmc Corporation

The Dial Corporation

Fmc Corportion

Charles W Lutz

Leon E Cohen

Joseph H Finley

Michael L Pinsky

Gale D Downey

John O Hudson

John H Barrett

Low bulk density, soda ash-based, nonphosphate laundry detergents are prepared by (a) loading nonaqueous liquid surfactant onto substantially anhydrous, hydratable soda ash particles, (b) turbulently dispersing the surfactant-loaded particles into an inert gaseous medium while wetting the dispersed particles with an atomized stream of dilute aqueous sodium silicate or with separate atomized streams of water and concentrated aqueous sodium silicate, and (c) recovering the resultant particulate detergent. Preferably, natural soda ash is used in the process, and both nonionic and anionic surfactants are loaded onto the soda ash, in that order.

Process for preparing a nonphosphate laundry detergent

A high solids slurry of surfactant, inorganic builders and filler salts, which may be spray dried to produce a granular laundry detergent, is prepared by contacting mixed organic and inorganic acids, such as produced in the first stage of the oleum sulfonation of detergent alkylates, with a dry alkali metal carbonate and then with water while subjecting the ingredients and reaction mixture to a controlled mulling/smearing action.

Dry neutralization process for detergent slurries

The invention relates to the dispensing of hydrogen peroxide into a clothes dryer. The aqueous hydrogen peroxide is placed into a container with a microporous, hydrophobic surface which is heated whereby the hydrogen peroxide is vaporized and delivered to the interior of the dryer where it is available to bleach textiles.

Vapor hydrogen peroxide bleach delivery

4Na.sub.2 SO.sub.4.2H.sub.2 O.sub.2.NaCl, having improved alkaline stability, is produced by crystallizing it in the presence of a stabilizing quantity of a soluble, organic polyphosphonate which is taken up in the crystalline structure of the compound. The stabilized product is useful as a peroxygen bleaching agent in alkaline bleach systems.

Stabilized sodium sulfate-hydrogen peroxide-sodium chloride adduct and

Sodium carbonate peroxide stabilized against loss of its active oxygen content is prepared by incorporating into sodium carbonate peroxide an ethylene oxide-derivative stabilizing agent selected from the group consisting of polyethylene glycol, polyethoxy fatty acid tertiary amines, diamines and quaternary ammonium salts thereof, N,N-polyethoxy fatty acid amides and polyethoxy fatty acid esters and recovering the sodium carbonate peroxide as a dry, free-flowing solid.

Stabilized sodium carbonate peroxide preparation method

Screen undersize anhydrous sodium tripolyphosphate particles, containing at least 2 weight percent of an alkali metal pyrophosphate, preferably sodium pyrophosphate, are moisturized with from about 145% to about 185% by weight of the theoretical amount of water to convert the anhydrous sodium tripolyphosphate into the hexahydrate form. The material is agitated during moisturization to keep the temperature below about 80.degree. C., and the moisturized material is dried at a temperature below 80.degree. C. to remove most of the free moisture. The product recovered from the drying step is a granular sodium tripolyphosphate hexahydrate product having a bulk density within the range of 0.59 g/cc to 0.64 g/cc and a friability of no higher than 30%.

Preparation of granular sodium tripolyphosphate hexahydrate with low

A particulate peroxygen compound having improved storage stability against loss of its active oxygen, the peroxygen compound being coated with 0.1 to 3.0 weight percent of an ethylene oxide-derivative stabilizing material.

Stabilized particulate peroxygen compounds

A stable viscous liquid bleach that may be safely applied directly to stubborn stains is prepared by adding certain anionic or nonionic surfactants to aqueous solutions containing up to 30% by weight hydrogen peroxide. The viscosity of the aqueous hydrogen peroxide solution is adjusted to be within the range of about 60 cps - 6,000 cps by addition of a water dispersible copolymer of an alpha-beta monoolefinically unsaturated lower aliphatic carboxylic acid crosslinked with a polyether of a polyol selected from the class consisting of oligo saccharides, reduced derivatives thereof in which the carbonyl group is converted to an alcohol group and pentaerythritol, the hydroxy groups of said polyol which are modified being etherified with allyl groups, said polyol having at least two allyl groups per polyol molecule.

Stable viscous hydrogen peroxide solutions containing a surfactant and a

A coated peroxygen compound having improved storage stability, said peroxygen being coated with about 0.1 to about 3.0 weight percent of a polyethylene glycol product having an average molecular weight greater than about 200.

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Princeton, NJ, United States of America

Charles W Lutz