| 摘要 |
Primary aliphatic alcohols are prepared by dimerising propylene in the presence of a catalyst to form a product containing a substantial proportion of normal hexenes, separating a fraction consisting of normal hexenes, dimerizing the hexene a fraction in the presence of a catalyst, reacting a fraction of the second dimerization product containing the normal hexene dimers in a C10 to C16 range but extending over a range of not more than 5C, with carbon monoxide and hydrogen in an oxosynthesis reaction, hydrogenating the resulting aldehydes and recovering the primary alcohol product. The first dimerization step may be in the presence of a transition metal oxide e.g. nickel, or chromium oxides, supported e.g. on silica, silica gel, or a silica-alumina at a temperature in the range 20 DEG to 150 DEG C. The second dimerisation may also be carried out in the presence of oxides of transition metals e.g. nickel, cobalt manganese or chromium oxides or mixtures thereof, a Ziegler catalyst, or a silica/ alumina catalyst supported as above. The feed to the second dimerisation step includes other straight chain mono-olefines in the C5 to C8 range. The olefinic fraction is fed to a high-pressure reactor with water gas and a cobalt catalyst, and the product hydrogenated. The products on sulphonation give active agents which are more rapidly and completely bis-degradable. |
