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A method for the production of suitable as the reagent hydrochloric acid from the preparation of organic isocyanates
A method for the production of suitable as the reagent hydrochloric acid from the preparation of organic isocyanates
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机译:从有机异氰酸酯的制备中制备合适的试剂盐酸的方法
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摘要
Reagent grade hydrochloric acid having an iron content of less than 200 p.p.b. is made from an industrial organic isocyanate manufacturing process by removing hydrogen chloride from organic isocyanates produced in the reaction between phosgene and an organic amine, converting the hydrogen chloride to concentrated aqueous hydrochloric acid, and contacting the acid with a strongly basic anion exchange resin.
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