DE1470481A1 - Process for the production of paraffin waxes - Google Patents

Description

DR.-ING. VON KREISLER ÜR.-ING. SCHÖNWAI.D '^' ^W ^ OI DR.-ING. TH. MEYER DR. FUES

COLOGNE 1, DEICHMANNHAUS

August 21, 1968 Fu / bz

The British Petroleum Company Limited, Britannic House, Finsbury Circust London E. 0.2 (England)

Process for the production of paraffin waxes

Eb are various methods of separating paraffin wax of hydrocarbon mixtures "known. These separation processes are quite general" in the production of Lubricating oils applied from petroleum-based raw materials.

It has now been found that the quality of the paraffin improves can be if the hydrocarbon mixtures are subjected to a mild hydrogenation before the paraffin is separated off will.

The subject of the invention is thus a process for the production of solid paraffins from petroleum hydrocarbon mixtures, which is characterized by the fact that the paraffin-containing hydrocarbon mixture prior to dewaxing a mild catalytic hydrogenation in the presence of a catalyst from the oxides of Fe, Co and Mo on activated alumina.

The mild hydrogenation can be carried out using "any" customary sulfur-fast hydrogenation catalysts carried out will. The following conditions are preferably used here

ORlGWAL INSPECTED 909808/0883 New documents (ArtzilAbOlfclMaMS ^ uiwaa «·· * ♦ ·· ^Igt "

Temperature: 150-340 °, preferably 250-320 °

Pressure «5-80 atm., Preferably 20-30 atm

Amount of hydrogen: 5-150 parts by volume per part by volume of oil

Spatial velocity

of the oil level 0.5 Ms 6 V / V / hour.

The following normal composition of the Catalyst:

Molybdenum oxide, MoO, 10 - 11 $>

Cobalt oxide, CoO 3.3 - 3.7 #

Iron oxide, Fe ₃ O ₃ 14 - 15 #

Aluminum oxide remainder

The catalyst can be prepared in any convenient manner However, it has been found to be advantageous to remove the support prior to the incorporation of the oxides of cobalt and Molybdenum with a solution of an iron salt, such as iron-IXI-nitrate, which decomposes by heating to form the oxide, to be impregnated »

The dewaxing of the hydrogenated oil can be carried out by any conventional method using solvents, the paraffin separating out of the oil solution as a pesticide after crystallization. A mixture of methyl isobutyl ketone and methyl ethyl ketone is particularly suitable as a solvent.

example

A Kuwait distillate having the characteristics shown in the table below was divided into two parts , one of which was hydrogenated under the following conditions

Temperature! 275 ° Prints 25 kg / oa ² Space velocity of the oil 1 V / V / hour. Used «hydrogen quantity

with standard conditions 25 V / V / oil

909808/088 3

The catalyst used had the following composition by weight of SuSara

Molybdenum oxide, MoO, 11 $ KCbaltoxyd, CoO 3.4 $>

Iron oxide, Fe ₃ O ₅ 14 9 ^

Aluminum oxide

The dewaxing of the "two batches of oil, i.e. the hydrogenated and the unhydrogenated oil, was carried out on a rotary filter under the following conditionsϊ

Solvent methyl isobutyl ketone

Methyl ethyl ketone 10 »

Dilution! 2 parts by volume of solvent / part by volume of oil

Temperature of the oil-solvent mixture

temperature des Kühl "bade st Filtration process! Raw distillate 36 -35 °. I. Hydrogenated distillate ! Filtration temperature 1 Filtration time! 10 -25 ° before the ent- naoh dem
wax entpa
raffi
kidneys Temporal Dryers 16 88
.0.898 To wash! 5 Seconds 12.44 Dry! 9 If 3.74 Loss of time » 76 η 1.4619 Total duration! ti The results obtained are in the ti guided! It following Talbelle oil yield,
Wt-56
Density "at viscosity
os. "at 50 ° before the Ent- naoh the Ent
paraffin paraffin viscosity
it. "at 100 • 87
15 ° 0.899 12.71 > 3.77 Refractive index
_n 20 1.5019
D '909808/0883

H70481

Stook point, C + 21 -24 +21 -24 Part of paraffin yellow White Color of the oil 1.52 1.80 1.20 1.50 Increase in color diohte _ 0.52 _ 0.40

The "hydrogenation" thus caused a very slight increase in the oil yield after dewaxing and enabled in particular the production of a perfectly white paraffin that did not require subsequent decolorization «Dae hydrogenated oil has one Color similar to that of the oil after dewaxing has been hydrogenated and it has better color stability than the non-hydrogenated oil

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Claims (2)

Claims 1)) Process for the production of solid paraffins from petroleum hydrocarbons, characterized in that the ρaräffinhaltige hydrocarbon mixture is subjected to a mild catalytic hydrogenation in the presence of a catalyst from the oxides of Pe, Co and Mo on activated aluminum oxide prior to dewaxing. _e 2) The method according to claim 1, characterized in that catalysts are used which contain 10-11 $ MoO ,, 3.3-3.7 i » CoO, 14-15% Pe ₂ O, and the remainder to 100 aluminum oxide. r ■, vt. 7 % ι Aba. 2 Mr. 1 Page 9 you HT < - «iJnjdyta. v. 4.9. ! «** /), 909808/0883