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1. WO2004007067 - COMPOSITION FOR REDUCING EVAPORATION AT SITES BOTH ON LAND AND OPEN WATER

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[ EN ]

I claim:

1. In an evaporation suppressant composition of a type for distribution both upon agricultural land comprising a moisture containing porous medium intended for growth thereupon of plants, and upon an open water surface of a reservoir storing water in bulk, formulation of said composition as a blend consisting of individual particulate aggregations each combining in adherent admixture with one another two essential constituents 'A' and 'B', where
'A' comprises at least one higher fatty alcohol selected from the group of higher fatty alcohols having 12 or more carbon atoms per molecule, and
'B' comprises a calcium-containing constituent selected from either:
(one) slaked agricultural lime; or, alternatively, (two) a mixture of powdered gypsum and sulfuric acid.

2. The composition of claim 1 wherein the ratio of essential constituents 'A' and 'B' is within a plus or minus twenty-five percent variation of being 1 part by weight of 'A' and 10 parts by weight of 'B'.

3. The composition of claim 1 wherein the ratio of powdered gypsum and sulfuric acid of the alternative (2.) 'B' constituent is within a plus or minus twenty-five percent variation of being equivalent to the ratio provided by admixing 5 millilitres of sulfuric acid per 300 grains of gypsum.

4. Means for conserving water by reducing evaporation of water from agricultural land using a composition as defined by any one of claims 1, 2, or 3, wherein said means is characterized by distributing said composition in an effective amount upon said land so that utilization of moisture in said porous medium is promoted without impairing water infiltration intosaid medium.

5. Means for conserving water stored in a open-surfaced reservoir by reducing the rate of evaporation of water from said reservoir by using a composition as defined by any one of claims 1, 2, or 3, wherein said means is characterized by distributing an effective amount of said particulate aggregations of said blend of essential 'A' and 'B' constituents upon said open water surface of a reservoir so that said higher fatty alcohol of said 'A' constituent will:
(first) disperse together with said distributed particulate aggregations during a period of time while said blend constituents 'A' and 'B' remain together in each aggregation to a progressively declining extent while, simultaneously, said particulate aggregations are caused individually to move apart from one another on said open water surface due to a mutual repulsion of said particulate aggregations that results from progressive water-induced release of ions predominantly of one charge sign from said 'B' constituent;
(second) progressively separate from said 'B' constituent of said blend due to action of water causing structural deterioration of said particulate aggregations; and
(third) form upon said open water surface a film of at least monolayer thickness of said higher fatty alcohol of said 'A' constituent.

6. A process for making the water conserving composition as defined in any one of claims 1 , 2, or 3, that comprises the steps of:
(first) applying means for causing said 'A' constituent to melt;
(second) applying means for maintaining said 'A' constituent in a melted state at a temperature between 90° C and 120° C for a period of time sufficient to perform thorough admixture of said 'A' and 'B' constituents;
(third) applying means for performing said admixture of said 'A' and 'B' constituents in the thermal condition of the foregoing (second) step;
(fourth) applying means for cooling the result of the foregoing (third) step to at least 30° C; and,
(fifth) applying means for converting and sizing the result of the foregoing (fourth) step to a powdery aggregate consisting of individual particulate aggregations each containing both 'A' and 'B' constituents and ranging in average cross-sectional size from about 300 microns to about, ten microns.