Abstract: Hydrocarbons and especially as gasoline are prepared by the catalytic conversion in two subsequent reactors of a synthesis gas containing hydrogen and carbon oxides and having a mole ratio CO/H.sub.2 above 1 and when the conversion commences a mole ratio CO/CO.sub.2 of 5 to 20. In the first reactor, which is preferably a cooled reactor, the synthesis gas is converted into a methane-containing first intermediate and this at least partly further into a second intermediate containing dimethyl ether, at 5-100 bar and 150.degree.-400.degree. C., in the presence of catalyst(s), the effluent from this reactor is combined with a recycle stream containing low boiling components of the effluent from the second reactor, and then passed to the second reactor, which is adiabatic, where the conversion of the second intermediate is carried out at substantially the same pressure as in the first reactor and 150.degree.-600.degree. C.

Abstract: A process is described for the preparation of substituted oxyacetaldehydes and acetals thereof according to the reaction sequence: ##STR1## wherein R.sub.1 and R.sub.2 are each lower alkyl or R.sub.1 and R.sub.2, taken together form a lower alkylene group; wherein R.sub.3 is alkyl, alkenyl or alkadienyl and X is halogen selected from the group consisting of chlorine and bromine, the reaction (i) being carried out (1) using a "phase transfer agent" and (2) in a two phase system.