1,4-Benzenedimethanamine → 1,4-Dicyanobenzene

5.1 g of terephthalonitrile, 1.0 g of catalyst (Ni 5136P from Harshaw/Filtrol--contains 65% nickel on a silica-alumina support), and about 85 g of ethanol/ammonia (contains about 10 wt % ammonia) were charged to a 300 cc stainless steel pressure reactor. After a nitrogen purge, the vessel was charged to a pressure of 500 to 1000 psi with hydrogen. The temperature was then increased until the reaction temperature of 150° C. had been obtained (typically 20-30 min). After the desired reaction interval, the contents were cooled and sampled. Product analysis and conversion were determined by gas chromatography. Yields of para-xylylenediamine varied between 63-81% depending on hydrogen pressure and reaction time which is preferrably from 2 to 8 hours. The remainder of the product was saturated para-xylylenediamine (1.4 bis (aminomethyl) cyclohexane. Table IV sets forth specific examples of reactions run to obtain the diamines from hydrogenation of terephthalonitrile.

1. customdepending on hydrogen pressure and reaction time which

ORD 기록

ord-6b095c98046f4a018ffc8999ecc5e1bc

출처 데이터셋

uspto-grants-1990_11

DOI

10.6084/m9.figshare.5104873.v1

특허 번호

US04973746