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Composition based on organic sulphide with masked odour Invention relates to masking the odour of organic sulphides and more specifically to alkyl or dialkyl sulphides, particularly dimethyl sulphide, as well as oxides thereof and particularly dimethyl sulphoxide by adding to said organic sulphides at least one odour masking agent which contains at least one monoester, at least one di- or triester, at least one alcohol, at least one ketone and optionally at least one terpene. |
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Solvent composition based on organic sulphoxide with masked odour Invention relates to solvent compositions which contain at least one organic sulphoxide of general formula (1): , where X, Y, R, R' are given in claim 1, by adding to said organic sulphoxide at least one odour masking agent which contains at least one compound selected from monoesters, di- or triesters, alcohols, ketones, aldehydes and terpenes. |
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Method for crystallisation of mesotrione Present invention relates to a method for selective control of crystallisation of a polymorphous form 1 of mesotrione from aqueous mesotrione solution. The present method involves use of a semi-continuous or continuous method of crystallisation, wherein aqueous mesotrione solution is fed into a crystalliser containing an aqueous suspension containing not less than 5 wt % mesotrione inoculating crystals, where not less than 80 wt % mesotrione crystals, contained in the aqueous suspension, are crystals of the form 1, in semi-continuous or continuous mode, and the crystalliser is kept at pH≤4.0, where in the end, said form 1 of mesotrione is obtained, which is characterised by X-ray powder diffraction pattern given in paragraph 1 of the claim. |
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Method of extracting sulphoxides and sulphones from mixture with hydrocarbons and sulphur compounds Invention relates to a method of extracting oxidised sulphur compounds, particularly sulphoxides and sulphones, from a mixture with hydrocarbons and sulphur compounds by treating the mixture with an extractant in weight ratio raw material: extractant from 1:1 to 1:7, and temperature from 30 to 70°C. The extractant used is isopropyl alcohol with water content from 30 to 50 vol. % (36.55-59.77 wt %) and hydrocarbon content from 0.05 to 0.1 wt %. |
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Method of crystallising guanidinium salts Invention relates to a method of crystallising compounds of formula I or their acid addition salts, , in which R1, R2, R3 assume values given in paragraph 1 of the formula of invention. In the process, corresponding formula I compounds or their mixture with impurities are dissolved at high temperature in water, which is saturated with at least one solvent which is immiscible with water, selected from alkylalkanoates, and optionally contains one or more solvents which are miscible with water, and subjected to crystallisation at lower temperature. |
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Method of purifying mesotrione Method of purifying mesotrione involves preparing a solution of a mesotrione sample in a hydrogen-containing solvent, bringing pH of the solution to 9.5 or higher and crystallisation of mesotrione from the solution. |
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Method of purifying mesotrione Invention relates to the method of reducing content of contaminants in mesotrione, which is used as an herbicide. A solution of mesotrione enolate is prepared in an aqueous solvent; one or several purification stages are carried out, chosen from filtration, adsorption, extraction using an organic solvent and decantation, and mesotrione is crystallised from the solution, obtained at the second stage. |
Another patent 2551163.