Abstract: The present invention relates to a process for inhibiting, at least in part, nitrification activity of ammonium-containing fertilizers (a1) and/or of ammonium-producing fertilizers (a2), which process comprises the steps of: a) Applying to soil and/or to foliage a nitrification inhibitory amount of one or more compounds (b) that are selected from the group consisting of (b1) polysulfides and/or (b2) thiosulfates and/or (b3) hydrosulfides; b) Wherein the one or more compounds (b) are applied simultaneously with, before or after the fertilizers (a) are applied to the soil and/or to the foliage such that the compounds (b) are in direct contact with the ammonium-containing fertilizers (a1) and/or the ammonium-producing fertilizers (a2); c) Wherein the one or more nitrification inhibiting compounds (b) are applied in an amount: i. such that the ratio (w/w) of “total protectable nitrogen” over “sulfur from compounds (b)” is at most about 8:1, preferably at most about 7.

Abstract: An aqueous composition comprises at least one oxidizable sulfur-based compound. A concentrated extract of the aqueous composition includes a gas chromatography/mass spectrometry-detectable amount of contaminating refinery hydrocarbons but the aqueous composition is free of refinery odor when stored for at least 24 hours at room temperature and 60% relative humidity. The aqueous compositions are prepared from a gas stream obtained from a petroleum refinery process, a coke oven, or the like, containing at least about 4 mol %, more specifically about 15 mol %, of hydrogen sulfide (H2S) and/or sulfur dioxide (SO2) and/or ammonia (NH3), and at least about 0.1 mol % of contaminating refinery hydrocarbons. The aqueous compositions are suitable for use in fertilizers, mining and industrial applications.

Abstract: Method for producing soluble potassium sulfate by recrystallization of crude potassium sulfate wherein the crude potassium sulfate contains an amount of potassium, calculated as K2O, of about 15 wt % or higher, and the resulting potassium sulfate crystalline material conforms with the following characteristics: the amount of insoluble material is less than about 0.05 wt %, a 1 wt % solution of the potassium sulfate has a pH below about 6, and/or 1 pH unit lower than the pH of the crude potassium sulfate, the fraction obtained after crystallization has an average particle size within the following parameters: (i) d90<about 0.6 mm, (ii) d10>about 0.02 mm, and (iii) dust amounts to about 0.4 wt % or less, whereby the resulting potassium sulfate contains more than 51% potassium, calculated as K2O.

Abstract: The current invention concerns a method for increasing an iron content of a solution by converting low iron containing solutions into highly concentrated ferric chloride solutions by adding iron containing substances. The invention concerns also methods for transporting and storage of said highly concentrated ferric chloride solutions.