| 摘要 |
<p>1,162,424. Glycerol. FMC CORP. 9 Jan., 1967 [11 Jan., 1966], No. 1107/67. Heading C2C. Glycerol is produced by reacting, at temperatures below the b.pt. of glycerol, an aqueous solution of allyl alcohol containing 5-200 mols. water per mol. alcohol with a solution of peracetic acid, containing initially 15-40% by wt. peracetic acid, in an organic solvent which is inert to peracetic acid, has a b.pt. below that of glycerol and is at least partially soluble in the reaction mixture, and removing glycerol from the reaction mixture. The reaction proceeds with epoxidation of allyl alcohol to glycidol followed by hydroxylation. Specified solvents for peracetic acid are lower ketones, esters, ethers and alcohols, used alone or in admixture with water-insoluble solvents, e.g. halogenated alkanes, preferred solvents being acetone, ethyl acetate, methylol and dioxan. Suitable reaction temperatures are in the range 20- 110‹ C. Glycerol may be recovered by fractionation to remove lower boiling components, any excess allyl alcohol being recycled if desired, leaving crude glycerol which can be further purified.</p> |
