CS200679B1 - Process for preparing unsubstituted aromatic hydrocarbons - Google Patents

Description

The invention also provided the preparation of unsubstituted aromatic hydrocarbons by hydrogenation of alkylated alkyl-substituted aromatic and naphthenic hydrocarbons by utilizing the heat of pyroplyn from petroleum pyrolysis, petroleum fraction and hydrocarbon, it also occurs in the pyrolysis of petroleum, petroleum fractions and hydrocarbons as a by-product in the production of up to Cg hydrocarbons.

It is advantageous to extract from benzene, xylanes or the like. naphthaline, which is readily operable. Other aroa andlococarbons, toluene and acetylnaphthalates are not used more widely and need to be separated from the zaes and recovered * by other apdaoboa,

In astonishing times, several holy processes have been developed in the holy, treating alkylated aromatic hydrocarbons, hiring toluene to benzene, resp. Naphthaline-naphthalene by hydrogenation of dealkylaemia:

Ar - CH ₃ + H ₂ --------- ArH + CH 3 reep, for benzene and xylan by a combination of dealkylary and alkylary (the so-called Xylenesplue process):

<V> - <3 H ₃ -------- <£> ₊ CH ₃ - <7> _-CH3

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HYDROGEN DETERMINATION PROOEAY EUJ

- catalytic catalysts based on cohesive metals (Houdry Litol, UOP Pyrotol, Soboli Boxtrol, etc.)

- Ti-free catalysts at a temperature of 600 to 800 ° C and a pressure of 3 to 6 MPa (HDA proooe, THD proooe, etc.).

The lob epolOne feature is a high demand for cord costs. Hydrogenation aa is carried out with compressed hydrogen, or hydrogen containing gas in a small excess.

In pyrolytiokoj production of oil hydrocarbons, rosp. its fractionation on oohladonio pyroplyn aa roaktoromaa uses prooosev (eg HTP prooaa Hooohat) in some of the aroamphatic oils, which do not heat decompose as petrol and practically do not decompose at temperatures up to 1200 ° C. The aromatic oils, predominantly BTX-frakoia, evaporate completely when inhaled, and the heat of evaporation is removed by pyroplyn. After the condensation of the aromatics with respect to the pyroplyn gas with respect to the water and to the water, the water is sprayed and the water is removed as water. The same pyrolysis product.

In this technological process, but also those who use high-temperature water pyrophones, the high heat content of pyrop gas at temperatures of 800 to 1300 ° C is not used, nor does the temperature gradient of 1300 to 600 ° C be used in any other way.

The hot-water level at the beginning of the wall utilizes the present invention, which employs a structured aromatic hydrocarbon and naphthanocarbons in a scrubbing and aystary pyrolysis process to smooth the pyroplyn. Pure gas alkylation of alkylene-substituted aromatic hydrocarbons and naphthalio hydrocarbons, and preferably of the benzyl and naphthaline alkyldorivatives, by utilizing the gas energy of high-pyrolysis pyrolysis, spraying said pyrrole at a temperature of about 500 to about 1,300 ° C with an aromatic hydrocarbon content C and subsequent deletion of aromatics after the condensation of the pyroplyn gas and water separation,

Advantageously, the hydro-naphthalkylalkyl is sprayed with an aromatic oil into a temperature of 400 to 600 ° C and the gas is fed to a frocoionator, which is heated to 150 ° C, and is preferably used to produce steam.

At the outlet of the fracoionator, the pyroplyn is at a temperature of 60-100 ° C and is fed to the condenser. The condensed BTX fractions were separated in water phase from the water and discharged to the bonzone separator. The front and rear portions after gasoline separation were returned to the scrubber.

Non-reubstituted aromatics, in particular naphthalene, can be isolated from the thaws of the fractions obtained in the fracolonator and preferably by naphthalene.

Under these conditions (800 to 1300 * 0, 0.12 MPa, 18 to 22% by volume Hj), a hydrogenated hydrocarbon, such as toluene, methyl-cyclohexane, xylenes to gasoline, is de-alkylated. In the continual enrichment of the scrub oil with alkylaubstitutedentyl, in particular with toluene and after the condensation of the Aroamthiocyanate

200,679 oil, both benzene-containing oil, can be produced by pyrolysis of alkylaubstituted aronates and unsubstituted aronates, in particular in benzene-containing carbon tetrachloride with desalkylaol toluene.

SUMMARY OF THE INVENTION The following is an illustration of who is an ahenathiocyanate prooee hydrogenated in arooates in pyrolysis of light petroleum:

The hot pyrolysis gases at a temperature of 500-100 ° C and lead the line 11 to the scrubber 2, which polishes the aromatic oil 4 and the addition of the alkylaubstituted derivates 18, and preferably 81a, the alkylaubstituted aronates. a / alobo naphthenes. at 200-600 ° C. The pyro-gases and the vaporized aroma 8 are guided by the dolonium water and the aromatic substances 8, which advantageously aa and vaporize the substantially noaubstituted aroelates.

The reverse flow rate of the Aaron Oil 5a and maintains the temperature at which the temperature rises between 20 and 200 ° C. Pyroplyn and both aroaMLtev aa Saale leads 2 to dhladlaoej aokolo 2, who from there at a temperature of 10 to 70 ° C condenses water and aroamtiocarbons and proceeds by watering 11 to Šalilo spraoevanle. The condensate vodonin 10 proceeds to the lower phase 12a, which is a water phase 13 from the aromatic oil 14, which aa reoloxifies the vodonin b and 6 and 8aat * 15, which is removed to the gasoline separator.

Examples of provodonla

Example 8, 1

Prl vyaokotopolnoj pyrolysis of gasoline (HTP proooa) itlaponin light gasoline on

destllaSnom roznozí 30 to I2O ° C pyroplyn of composite is formed hydrogen 18 to 22% nol. CELLAR CELL 8 until 10 nol. kysliSnlk Uhli81tý 8 to 12% nol. Netanel 7 until 10 % nol. otylén 5 to 8 5t nol. aootylén 5 until 8 % nol.

water 45 to 50 mol.

at a temperature of 1200 ° C and a pressure of 0.13 MPa. The oohladonlo pyroplyun and the team built up ohenlokýoh roakolí problohajúoloh in Aon a and uses light aronate oil of the composition t

benzene 30 to 40% nol. toluene 30-40 £ nol. flavored 10 to 20 t nol. petrol 5 to 10 µl nol.

The oil was cooled to 600 ° C and dried up by the gasification of light aroalcoholic oil and desalkylaol of its alkylated 8aatl, and packed oolladonlo pyroplyn and carried out the olefinic oil with an aronate oil of 250 ° C to 250 ° C. ▼ o frakelnaSnej Basht and pyroplynplora from dragon tractors Trakali by sprinkling oirculating oil

- drawing oil of an oil on the boiling point of 150 to 25 ° C

- attractant oil of atrial boiling point of 100 to 120 ° C.

In Ohladlao and Keaqmanoj Sasta, the pyroplyn was cooled to 40 ° C and condensed to 1.5 MPa and condensed with water and a light aronate oil which, after separation from the water, charged benzene 60 to 80 µl. toluene 10 to 20 mol%.

has consumed 3 to 5 centuries. 5 to 10 Jt mol.

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8 part of light areauttioca oil * after condensation Ido on oeparation of bonaan * 8 part after addition of toluene and * vraoia to smooth pyroplyn.

Example 8. 2

In high-temperature pyrolysis of the bonain, the eye in Example 8. 1 o * pyroplyn is sprayed with a throat of araeaate oil after depositing at 60 ° C with a deposit of 0.2 l and 2 µl of roll. naphthaline 13 * 1 20 eats rol.

alkylnaphthalines 10 and 15 aol. poured out oranges 8 to 15 of her aol.

lvlolo podlooly (altalans, etc.) 60 to 70 Aol · fallen aroaate oil after decapsulation from pyroplyn * heat dissipation, reflects * on ooparúol in the naphthalene separation * after addition of alkyl naphthalane o and vraoia to scrape.

Example 8, 3

In the case of the pyrolysis of bonin as in Example 8. 1 o * bonaan and naphthaline oleol * and oirlcell.

Example 8. 4

In the high-temperature pyrolysis of petroleum, petroleum fractions and / or hydrocarbons, and ary aloe-alkali, which vanishes as waste, the nonalkylated and alkylated aromatics laollate, and the alkylated aromatics are used and used for propylar oohladonio pyroplyn.

Claims (2)

CLAIMS 1. A process for the preparation of non-titanated aromatic hydrocarbons, such as arylalkyl and naphthalone hydrocarbons, preferably alcohols, naphthalenes, pyrophils, petroleum, nol. Hydrogen * 500 ° C * 1 1 300 ° C * * AroAllocal and / or naphthalic hydrocarbons containing 10 and 10 ° C, the alkylsubstituted hydrocarbons are cooled to 200 ° C to 100 ° C, cooled to below 100 ° C with a liquid liquid, a frafcolonol, and a non-alkylated aroratlate hydrocarbon and aloloc oa rooirkulttje sp *? on pyroplyn. 2. A process for the preparation of aromatic or hydrogenated hydrocarbons according to point 1, which comprises 20 and 60% of pyrrolidone and pyrolysis bonaine. Hydrogen * 800 ° C and 1,300 ° C * are controlled by rhio-aerobic arcortlocal and / or naphthalic hydrocarbons * with a range of 20 to 60 milliliters. The alkylbutanated bonaanocycloaxane * is cooled to 500 to 70000 ° C, when the temperature is 200 to 1400 ° C, and Xerosulfurethane is an alkali metal salt of aloamyl alcohol.