Abstract: A biocide comosition useful for industrial materialsl comrising at least one metal oxide and at least one metal salt, wherein said at least one metal oxide is in a molar ratio of between 4:1 and 1:2 with said meal salt. The invention additionally relates to a process for roducing a biocide composition, comprising the steps of mixing a metal salt solution with at least one metal oxide in a molar ratio of between 4:1 and 1:2 oxide to salt and drying the resultant mixture thereby forming a cement powder.

Abstract: A method for the manufacture of physically prepared slow-release fertilizer by coating fertilizer particles with at least one layer of a substantially water insoluble metal salt formed in-situ from an organic acid having between 6 and 30 carbon atoms and a metal oxide or carbonate. Optionally, the coating layer contains micronutrients and inert materials. In a preferred embodiment, an additional layer of paraffin is added on the coating of metal salt of organic acid. The method is applicable for most of the known fertilizers. The method enables to vary the rate of fertilizer release and the release period time according to specific requirements.

Abstract: The present invention relates to a process for the manufacture of monopotassium phosphate using solvent extraction technique. According to the invention, the reaction occurs between phosphoric acid and potassium chloride at a temperature between 0 and 100 degrees C. in the presence of an organic solvent comprising a long chain primary amine having between 6 to 28 carbon atoms. The lower phase containing monopotassium phosphate and dipotassium phosphate is acidulated with a solution of phosphoric acid to a pH in the range of between 2 to 6, whereby crystallized monopotassium phosphate is obtained and separated. The upper phase which contains the organic solvent, aminehydrochloric acid as well as most of the impurities originally present in the starting reagents, is treated with a base at a temperature in the range of 20 to 100 degrees C. whereby the amine is regenerated and recycled to the process. Typical examples of suitable bases are calcium oxide, calcium carbonate or mixtures thereof.