DE1126551B - Procedure to prevent the octane number of platforms from falling - Google Patents

Description

BSTERNAT.KL. C 10 g

GERMAN

PATENT OFFICE

B42446IVc / 23b

REGISTRATION DATE: NOVEMBER 10, 1956

NOTICE THE REGISTRATION ANDOUTPUTE EDITORIAL: MARCH 29, 1962

The invention relates to a method for increasing the usefulness of platforms.

The platforming process can significantly increase the octane number of straight run fractions in the boiling range of motor gasoline. However, it has recently been found that the octane number of platforms drops rapidly when exposed to light and air. This effect cannot be avoided even through the use of oxidation inhibitors. In the case of catalytic or steam-cracked gasolines, such a drop in octane number does not occur , so it appears that the compounds that cause the octane number are produced by the platforming process itself. The octane reduction on typical platforms compared to samples of catalytic or steam cracked gasolines is shown in Table 1.

Tabel 1 without
A real
Light and RON
under
ung of
nd air away
took material A
effective
Time
in days 87.8 82.8 5.0 Product No. 1
from platforming
procedure 1 89.5 83.8 5.7 Product No. 2
from platforming
procedure 2 93.2 88.5 4.7 Product No. 3
from platforming
procedure 2 94.5 94.0 0.5 Catalytic
cracked paint
petrol 6th 94.0 93.9 0.1 Steam cracked
petrol 1

Method of prevention

the lowering of the octane number

of platforms

Applicant:
British Petroleum Company Limited, London

Representative: Dr.-Ing. A. v. Kreisler, patent attorney, Cologne 1, Deichmannhaus

Claimed priority: Great Britain 11 November 1955 (No. 32 289)

Kenneth Shephard Cuddington and John Mather, Sunbury-on-Thames, Middlesex (Great Britain),

have been named as inventors

Pressure 1 to 36 kg / cm *

Temperature 149 to 260 ° C

and preferably at one
Room flow rate from 0.1 to 1.0 V / V / hour.

and an amount of hydrogen or hydrogen rich gases from 360 to 720 v / v

used plat-

formats

It has now been found that this decrease in octane number is thereby restricted or prevented can be that the platform is subjected to a mild hydrogenation.

According to the invention, the Platformate in the presence of hydrogenation catalysts under the treated with hydrogen under the following conditions:

Sulfur-resistant hydrogenation catalysts are preferably used as the catalyst, in particular those which contain one or more sulphides of the metals of VI. or VIII. Group of the Periodic Systems, e.g. B. Mixtures of nickel and tungsten sulfides contain.

In one experiment, a sample of a butane-free product from a platforming process was used A RON of 87.1 exposed to light and air for 24 hours. Then the OZ dropped to 81.5.

A second sample of a butane-free platforming product was made under the following conditions hydrogenated:

209 557/390

Nickel-tungsten sulfide catalyst

Reaction pressure 17.6 kg / cm ²

Reaction temperature 224 ° C

Room flow velocity 0.25V / V / hour.

Amount of gas supplied ... 540 V / V used

product

After hydration, the platform has an RON of 86.5, that after 96 hours of exposure to air and light had only dropped to 86.1. Furthermore, it was found that the compounds required for the light-catalyzed decreases in the octane number are responsible in the fraction with the boiling range 100 to 138 ° C are included, as can be seen from Table 2.

Tabel 2 RON
under
ten of
nd air away
took fraction
of the platform A
effect
of air
and light
in days without
One we
Light and 83.8 5.7 Total
Platform format 2 89.5 68.1 4.1 Initial boiling point
up to 138 ° C (60 Vo
lum percent). 1 72.2 70.5 0.2 Initial boiling point
up to 100 ° C 1 70.7 69.2 7.1 100 to 138 ° C ... 1 76.3 Isooctane
+ 0.23 cm ³
TEL
3.7851
(USG) * Isooctane
+ 0.23 cm ³
TEL
3.7851
(USG) * 138 ° C to end
boiling point
(40 vol
percent)
(45 weight
percent) 3

format and hydrogen-rich gas. The platform goes through line 2 in column 3, in which it is fractionated into three components, of which the middle one contains practically all the compounds that cause the OZ to drop. This fraction is passed through line 4 to the hydrogenation stage 5, which is fed through line 6 with a hydrogen-rich gas from stage 1. After hydrogenation, this fraction becomes again with the top and bottom fractions

ίο united, which run through lines 7 and 8. the Dotted extension lines 9 and 10 of the top and bottom fractions show a possible variant the procedure in which the individual political groups are not united. The dotted line 11, the the fraction vessel 3 bypasses shows a further embodiment in which the entire butane-free platform is hydrogenated without prior division.

* Corresponds to about 102.3 on the octane rating scale.

According to a further embodiment, therefore the platforming fraction (boiling point 100 to 138 ° C.) separated from the mild hydrogenation described above subjected and finally with the remaining portions of the platforming product again united.

The hydrogenation treatment according to the invention can be separated from the platforming process and also as a Part of a continuous process to be carried out along with this. The platform format cooled and optionally reduced the pressure before it is fed into the hydrogenation stage.

The continuous process is illustrated in the flow diagram. In the case of the undressed Lines shown in the embodiment, the platforms from Zonel contain liquid, butane-free plat-

Claims (4)

PATENT CLAIMS: 1. A method for preventing the octane number of platforms from dropping by the action of light and air, characterized in that the platforms are hydrogenated at pressures of 1 to 36 kg / cm ² and temperatures of 149 to 260 ° C. of a mild, known per se be subjected. 2. The method according to claim 1, characterized in that the hydrogenation catalysts one or more sulfides of the metals of VI. or VIII. Group of the Periodic Table and preferably consist of mixtures of nickel and tungsten sulfides. 3. The method according to claims 1 and 2, characterized in that the space flow velocity 0.1 to x 1 V / V / hr, and the amount of the hydrogen or hydrogen-rich gas 360 to 720 V / V platform format. 4. The method according to claims 1 to 3, characterized in that from the platformat only the fraction of the boiling range from 100 to 138 ° C is subjected to the mild hydrogenation. Considered publications:
German patents nos. 933 648, 865 337, 864 721, 945 587, 875 801, 946 648, 734 151,
595, 881 643, 894 104;
Belgian Patent No. 508,926;
U.S. Patent Nos. 1,981,305, 2,695,866, 498,559, 2,220,699, 2,063,113, 2,512,570,
2,249,461; French patent specification No. 862 421,
600, 833 971, 1109 475, 850 011;
British Patent No. 711,670;
Excerpts from German patent applications, Vol. 6, issue date November 10, 1948, I 68464 IVd / 23b; Petrol. Ind., 27, No. 2, pp. 52 to 59, February 1935, reported in the Chemisches Zentralblatt, 1935, II, p. 2766; Ind. Engng. Chem., 47, pp. 744 to 749, April 1955, reported in the Chemisches Zentralblatt, 1956, p. 1196. 1 sheet of drawings