Patent ID: 8703088

Claim:
A process for reducing the amount of hydrazine from a hydroxylamine-free base containing hydrazine, the method comprising treating said hydroxylamine-free base with a scavenger agent chosen from compounds of formula II wherein X 3 is chosen from: O, NR′, S, or PR′, wherein R′ is chosen from: H, OH, alkali metal, NR IV 2 or alkyl, wherein each R IV is independently chosen from: H or an optionally substituted hydrocarbyl group; R is chosen from: CR 1 R 2 where each of R 1 and R 2 is independently chosen from: H or an optionally substituted hydrocarbyl group, wherein R 1 and R 2 together can also form an optionally substituted ring; R 3 C═CR 4 where R 3 and R 4 together form an optionally substituted ring; and R 5 R 6 C—CR 7 R 8 where R 5 and R 7 together form an optionally substituted ring, and wherein each of R 6 and R 8 is independently chosen from: H, or an optionally substituted hydrocarbyl group.