DE1026462B - Process for the production of gasoline - Google Patents

Description

GERMAN

The invention relates to engine fuels for internal combustion engines.

Hydroforming is a well-known process for producing high octane gasoline from Low octane petroleum spirits. In hydroforming, petroleum gas fractions become lower Octane number treated at elevated temperatures with hydrogen in the presence of catalysts, the naphthenes convert into aromatic compounds, resulting in products with a significantly higher octane number. A A widely used hydroforming process uses catalysts containing platinum and is called platforming designated. It has long been known that the octane number of a catalytic reformate by a thermal reforming can be increased and it has recently been proposed to apply this principle to products to apply from the platforming.

It has been proposed to use raw materials for catalytic reforming into a lower boiling point and to split up a higher-boiling fraction and these two fractions separately for catalytic reforming subject. This is a particular embodiment of catalytic reforming and does not apply to the Discovery that catalytic reformates are further improved by subsequent thermal reforming can be carried out regardless of whether the catalytic reforming is carried out in one or more stages became.

It has now been found that it is advantageous to use only a part of the catalytic reformate of a thermal Subject to reforming. According to the invention, products from catalytic reforming in a high-boiling fraction with a relatively high octane number and a low-boiling fraction with a relatively low octane number separated, whereupon the low-boiling fraction to increase the octane number subjected to thermal reforming and then with the high-boiling fraction for recovery a high octane gasoline is mixed.

Compared with the thermal reforming of the entire catalytic reformate, the inventive Process has the advantage that less material has to be thermally treated and therefore smaller Reaction vessels can be used.

When carrying out the process according to the invention, a catalytic reformate is converted into a high-boiling one Fraction with an octane number (research method) over 100 and into a low-boiling fraction separated. This is refined by thermal reforming and then with the high-boiling fraction mixed.

This produces a gasoline with an octane number (research method) of at least 100.

Process for the production of gasoline

Applicant:

The British Petroleum Company Limited, London

Representative:
Dr.-Ing. A. ν. Kreisler, Dr.-Ing. K. Schönwald,

Dipl.-Chem. Dr. phil. H. Siebeneicher

and Dr.-Ing. Th. Meyer, patent attorneys,

Cologne 1, Deichmannhaus

Claimed priority:
Great Britain 24 November 1955

Warren Nevin Norton Knight,

Sunbury-on-Thames, Middlesex (Great Britain),

have been named as inventors

The temperature from which the high-boiling fraction with an octane number (research method) above 100 is separated is determined by the properties of the catalytic reformate (ζ. B. octane number, boiling range and chemical Condition) and can easily be determined experimentally.

Likewise, the severity of the thermal reforming for the low-boiling fraction, which is necessary to ultimately deliver a gasoline with an octane number (research method) of at least 100, depends on the properties of the low-boiling fraction and the octane number of the high-boiling fraction. In general, the thermal reforming with the low-boiling fraction is advantageously carried out at temperatures from 538 to 649 ° C. and at pressures from 15.1 to 85.5 kg / cm ² .

The method according to the invention is particularly suitable for use on products from the platforming method and is explained below using an example.

A straight-run Kuwait gasoline with a boiling range of 90 to 190 ° C is in the presence of a catalyst of the following composition:

Platinum 0.37 percent by weight

Fluorine 0.51 weight percent

Chlorine 0.26 percent by weight

Aluminum oxide 98.8 percent by weight

709 910/377

Claims (1)

3 4 introduced under the following conditions of the platforming zone 1 through line 2 and the one generated here subject to: liquid, butane-free gasoline through line 3 in the middle Pressure 36 2 kg / cm ^{2 of the} distillation column 4 passed. Will be in the column Temperature of the catalyst ' ^{the gasoline is separated into two} fractions, the separating at the feed 504 ° C ^{5 tem temperature is} chosen so that the higher boiling point Returned gas volume '.'. 1656 V / V starting material fraction has an octane rating (research method) of Room flow at least 100 has. The lower-boiling gasoline is over speed 2.0 V / V / h ^Ko P ^{f duidh} . ^{Guide to} thermal reforming zone 6 headed. The product of the thermal re- The yield of gasoline with an octane number of 89 io formation is freed from butane and (Research number) is 80 ⁰ I ₀ . The product from this tioned before it reaches the line 7, where it is with the Platforming is carried out continuously in a 10-bottom high-boiling gasoline, which is in line 8 from the bottom of the Distilled column, 65% of which is taken off a low-boiling distillation column, is mixed. Product with a final boiling point of 140 ° C (ASTM) The gasoline mixture is fed through line 9 to and the corresponding residue of 35 weight retention removed,
percent with an octane number of isooctane - + - 0.25 cm ³ Tetraethyl lead / 3.785 l (research method) is obtained. Patent claims: The low-boiling product from the platforming thermal reforming at a pressure of 1. Process for the production of gasoline, pre- 53.8 kg / cm ² and a temperature of 571 ° C, preferably with an octane number of at least 100, thrown, a product of the following composition characterized in that products of a accrues: catalytic reforming, especially from the C ₃ and lower 25 percent by weight platforming, in a high-boiling fraction with C 14 5 weight percent ^emer relatively high octane number, preferential Petrol".'.'.".''.'.'.'.'.'.".'.'.'.'.'.'.'. 55.5 percent by weight ^{25 knows of} at least 100, and in a low-boiling point Polymeric 5.0 percent by weight fraction with a relatively low octane number are separated, whereupon the low-boiling fraction The gasoline corresponds to 36 percent by weight of the total to increase the octane number of a thermal reProduct from the platforming and has undergone an octane number formation and is then mixed with that of 98 (research number), by mixing the thermally high-boiling fraction,
Reformed gasoline with the high-boiling product from 2. The method according to claim 1, characterized by platforming, a gasoline with an octane number is characterized that the thermal reforming at Tempevon isooctane -f- 0.03 cm ³ tetraethyl lead / 3.785 1 in a temperature of 538 to 649 ° C and at pressures of 71 percent by weight (35 + 36), based on 15.1 to 85.5 at. on the product from the platforming. 35 The method according to the invention is shown in the drawings. explained. Gasoline is described in Catalytic Reforming French Patent No. 1 074 682. 1 sheet of drawings © 709910/377 3.58