摘要 |
1,265,045. Chloroprene stabilization. E. I. DU PONT DE NEMOURS & CO. 2 Sept., 1969 [18 Sept., 1968], No. 43463/69. Heading C2C. Chloroprene is stabilized by a product ob. tained by (a) adding an alkali metal or alkaline earth metal nitrite to 1,3-dichloro-butene-2 or di-isobutylene, (b) adding concentrated hydrochloric or sulphuric acid to the mixture so obtained, and (c) recovering the reaction product from the metal salt also formed. |