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AssigneeCovestro Intellectual Property GmbH & Co. KG
InventorsMichael Merkel, Tim Loddenkemper, Frank Gerhartz, Stefan Hirschfeld
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The invention relates to a method for preparing a suspension of a hydrochloride of an organic amine, comprising the following steps of (i) initially charging at least one organic solvent in a reaction vessel to form a liquid level, (ii) adding hydrogen chloride, (iii) adding the organic amine, wherein the organic amine is added below the liquid level present in the reaction vessel and steps (ii) and (iii) are at least partly carried out simultaneously. Furthermore, the present invention also relates to a method wherein the suspension obtained after step (iii) is reacted in a step (iv) with phosgene to obtain the organic isocyanate corresponding to the organic amine used, to the corresponding organic isocyanate and to the use of the organic isocyanate for producing polyisocyanates.
A method for preparing a suspension of a hydrochloride of an organic amine, comprising the following steps:
Dependencies are inferred from the claim text.