Hydrochloric Acid → Aniline

Participants

Reaction Steps

A solution of aniline hydrochloride was prepared by mixing 93 parts by weight of aniline, 110 parts by weight of concentrated hydrochloric acid, and 930 parts by weight of water. To the solution was added at room temperature 165 parts by weight of a 37 % (by weight)-aqueous formaldehyde solution and subjected to reaction for 2 hours. Then, the reaction mixture was neutralized with a 5 % (by weight)-aqueous sodium hydroxide solution, washed with water, filtered, and dried to yield 168 parts by weight of a yellow powder of an aniline resin. Thirty parts by weight of the resin and 120 parts by weight of carbon disulfide were charged into a closed vessel and subjected to reaction at 40° to 44° C. for 1 hour to yield 33.7 parts by weight of a resin. The elementary analysis showed that about 12 % by weight of carbon disulfide had been introduced into the resin. The resin is designated as heavy metal-binding agent E.

Provenance & Evidence