Compositions – Compositions containing a single chemical reactant or plural... – Organic reactant
Patent
1983-06-07
1985-05-28
Albrecht, Dennis L.
Compositions
Compositions containing a single chemical reactant or plural...
Organic reactant
423329, 25217425, 252179, C11D 306, C11D 312, C11D 1100
Patent
active
045199337
ABSTRACT:
Type A, especially type 4A zeolites are well adapted as detergent builders, said zeolites comprising (i) primary particles having a mean particle diameter ranging from 0.1 to 10.mu., (ii) a cation exchange capacity in excess of about 100 mg CaCO.sub.3 /g of anhydrous material, and (iii) a rate constant, relative to the surface area of the zeolite per liter of wash solution, in excess of about 0.15 s.sup.-1 lm.sup.-2. The builders are prepared by first determining the value of the rate constant for a given zeolite sample. Since a higher rate constant value corresponds to a lower degree of salt incrustation on fabrics, only those zeolites having a value above the predetermined minimum will be incorporated into detergents. Thus, zeolites otherwise appearing identical can be differentiated, with only those not causing high levels of incrustation being selected.
REFERENCES:
patent: 4073867 (1978-02-01), Roebke
patent: 4096081 (1978-06-01), Phenicie
patent: 4126574 (1978-11-01), Reinwald
patent: 4171277 (1979-10-01), Dankworth
patent: 4184975 (1980-01-01), Krings
patent: 4271135 (1981-06-01), Wuest
Gresser Robert
Michel Max
Albrecht Dennis L.
Rhone-Poulenc Chimie de Base
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