1
Carel W J Hooykaas, Jeffrey P Newton: Fixant for mixed organic and inorganic contaminated materials and method for using same. Pelt & Hooykaas, Levine & Mandelbaum, July 4, 1995: US05430235 (53 worldwide citation)

A toxic waste fixant for detoxification of a contaminated material includes a mixture of ferric sulfate, manganese sulfate, organophilic clays, an oxidizer and aluminium sulfate. The respective amounts are preferably about 15-19% b.w. of ferric sulfate, about 15-19% b.w. of manganese sulfate, about ...


2
Carel W J Hooykaas: Method of processing waste materials, particularly sludge containing noxious metals. Pelt & Hooykaas, Ostrolenk Faber Gerb & Soffen, July 22, 1986: US04601832 (23 worldwide citation)

A noxious metal(s) containing waste material is treated with an acid solution of a metal of group VIIa or VIII of the Periodical System, preferably iron or manganese. Subsequently, the metal of group VIIa or VIII dissolved in the acid is precipitated as a metal hydroxide and simultaneously the noxio ...


3
Carel W J Hooykaas: Method for capturing ecologically harmful substances from material polluted with such substances. Pelt & Hooykaas, Levine & Mandelbaum, October 10, 1995: US05457272 (16 worldwide citation)

A method is described for capturing ecologically harmful substances, both of organic and inorganic nature, by absorbing these substances on a zeolite or on a swellable, layered clay which has been modified with hydroxyaluminium to form an aluminium-rich zeolite or a pillared clay containing pillars ...


4
Carel W J Hooykaas: Process for the synthesis of a layered, clay-like material as well as its use. Pelt & Hooykaas, Edmund M Jaskiewicz, March 12, 1996: US05498285 (14 worldwide citation)

The invention relates to a process for the synthesis of a layered, clay-like material starting from a silicon oxide containing material in a finely divided state by reacting a glass phase containing material at a pH from 5 to 8, in the presence of water, with a source of layer-forming metal ions and ...


5
Carel W J Hooykaas: Fixant and matrix for fixing toxic organic compounds in waste material. Pelt & Hooykaas, Levine & Mandelbaum, December 27, 1994: US05376283 (10 worldwide citation)

A fixant for fixing toxic organic compounds comprised in waste material comprising an inorganic binder based on calcium compounds mixed with an alumino silicate, and at least one metal sulphate which fixes said organic compounds and counteracts leaching, is disclosed. Preferably a combination of sev ...


6
Carel W J Hooykaas, Jeffrey P Newton: Toxic waste fixant and method for using same. Pelt & Hooykaas, Levine & Mandelbaum, September 13, 1994: US05347077 (10 worldwide citation)

A toxic waste fixant for detoxification of a contaminated soil, sediment, and or sludge material includes a mixture of: ferric and/or ferrous sulfate, manganese sulfate, and/or aluminium sulfate and/or Portland cement, and/or gypsum (calcium sulfate), and/or blast furnace slag, and/or lime (calcium ...


7
Carel W J Hooykaas: Method for fixing waste material. Pelt & Hooykaas, Levine & Mandelbaum, December 13, 1994: US05372729 (9 worldwide citation)

The invention relates to a method for fixing toxic or nontoxic waste material, in which method the waste material is allowed to absorb into an organic absorbent, the waste material-containing absorbent thus obtained is treated with an occluding agent and the resulting product is mixed with a hydraul ...


8
Carel W J Hooykaas: Method for rendering toxic waste harmless. Pelt & Hooykaas, Fiddler & Levine, November 26, 1991: US05067981 (9 worldwide citation)

A method for rendering toxic waste harmless by mixing water, at least ground, granulated blast furnace slag as reagent and said waste to form a transportable fluid slurry which can be allowed to harden to a hard, rock-like material. The toxic waste appropriately consists of substances which do not r ...


9
Carel W J Hooykaas: Procedure for the treatment of combined wet filter cakes. Pelt & Hooykaas, Edmund M Jaskiewicz, June 9, 1981: US04272293 (9 worldwide citation)

A procedure for the treatment of filter cakes obtained during the purification of chemical substances in liquid form, especially during the purification of phosphoric acid obtained by wet methods, whereby a filter cake is dried and heated in the presence of a melt of inorganic material.


10
Carel W J Hooykaas: Cement composition and method for the preparation thereof. Pelt & Hooykaas, Levine & Mandelbaum, February 28, 1995: US05393342 (8 worldwide citation)

The invention relates to a cement composition which can be hardened hydraulically and which consists of ground cement clinker material, granulated blast furnace slags and comminuted steel slags. The comminution of the steel slags is preferably carried out by grinding, in particular to a particle siz ...