DE492427C - Process for the production of oxygen-containing organic compounds - Google Patents

Description

Process for the production of oxygen-containing organic compounds The patent 479 $ 29 describes a process which allows the catalytic Hydrogenization of oxides of carbon in addition to methyl alcohol @ available hydrous Mixtures of oxygen-containing organic compounds by fractional distillation to be broken down into individual components, by first taking the bulk of the water removed from the mixture.

It has now been found that one can, in a very simple manner, achieve an extensive Separation of the water from the mixtures mentioned can be achieved if you use them the -Ti! ef! subcooling, so that the water in solid or semi-solid form separates. Organic compounds are generally separated with your water away:.

If the mixture contains a high amount of methyl alcohol, it is advisable to distill off the bulk of the latter beforehand, and may even be necessary, since otherwise very deep cooling is required because larger amounts of methyl alcohol make it difficult for the water to freeze out. Example A crude product that is produced in the catalytic hydrogenation of a gas consisting of 30% carbon oxide and 70% hydrogen at 20 ° and zoo atm. Pressure obtained by means of a contact prepared from r 5 parts of potassium bichronla, t, [parts of zinc oxide and 2 parts of copper oxide, is freed from the bulk of the methyl alcohol by distillation or shaking with water. The oily residue, which still contains about 2o0 'of water and has a specific gravity of 0.86o, is cooled by means of carbon dioxide snow and sucked off the precipitating crystal pulp, consisting mainly of water and methyl alcohol. In the resulting filtrate, which makes up about 750. "O of the aforementioned oily residue and whose specific gravity is now 0.823, only small amounts of water are now present; a simple distillation is sufficient to remove the isobutyl alcohol present in the crude oil (with the above-mentioned Arbeitsbedilngungen over 20% of the crude product) and also other organic oxygen-containing substances to make practically anhydrous.

The isobutyl alcohol fractyon, which is often yellowish in color as a result of minor admixtures is refined with the addition of a little metallic sodium or potash. A water-white, almost 100% isobutyl alcohol is then obtained.

If you add other suitable substances to the oil to be cooled, such as Benzene, or: external sulphurous acid, is added, and the image of the crystal pulp appears significantly easier.

Instead of the described ArbiextsWesie you can also use the white procedure, .that the crude product is fractionated and that which passes over at 75 to 100 ° Fraction made up of a mixture of methyl alcohol, whale sex, isobutyl alcohol and above säjedenden Stoen consists, which can only be achieved by distillation with large Difficulty and only after repeated distillation can separate in the above Way freed from the bulk of the water by freezing and on pure isobutyl alcohol, further processed as stated above.

Claims (1)

PATENT CLAIM73 Embodiment of the process of main patent 479 829, characterized in that the mixture obtained in the catalytic hydrogenation of the carbon oxides is cooled so deeply to remove the water that: such as the water, optionally together with organic compounds, precipitates in solid or semi-solid form.