FIELD: petrochemical industry, chemical technology.
SUBSTANCE: invention relates to a method for preparing lower olefins with the enhanced content of propylene and aromatic hydrocarbons. Method involves pyrolysis of hydrocarbon raw in tube furnace in the presence of steam at temperature 730-890°C with ethane and/or ethylene and methane as additives. Addition of ethane and/or ethylene and methane in the mass parts of components = (0-0.2):(0.1-0.9):(0.05-0.66) is used in the amount up to 55 wt.-%. Method provides increasing yield of propylene without significant change in the yield of the total yield of lower olefins and benzene-toluene-xylene fraction as compared with pyrolysis of raw under the same conditions but without additives of abovementioned hydrocarbons.
EFFECT: improved preparing method.
1 tbl, 18 ex
| Title | Year | Author | Number |
|---|---|---|---|
| PYROLYSIS METHOD OF LIQUID AND GASEOUS HYDROCARBONS AND DEVICE FOR ITS IMPLEMENTATION | 2019 |
|
RU2701860C1 |
| PYROLYSIS OF PROPANE-BUTANE HYDROCARBON GAS WITH HIGH ETHYLENE YIELD AND WITHOUT COKE ACCUMULATION | 2005 |
|
RU2325425C2 |
| CATALYST OF PYROLYSIS OF PROPANE-BUTANE HYDROCARBON MATERIAL IN LOWEST OLEFINS AND METHOD OF OBTAINING IT | 2005 |
|
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| METHOD OF PRODUCTION OF LOWER OLEFINS | 2004 |
|
RU2265641C1 |
| METHOD FOR OBTAINING LOWER OLEFINIC HYDROCARBONS | 2011 |
|
RU2468066C1 |
| METHOD FOR CATALYTIC PYROLYSIS OF HYDROCARBON MIXTURE C-C INTO LOWER OLEFINS C-C | 2015 |
|
RU2601864C1 |
| CATALYST FOR PYROLYSIS OF HYDROCARBON MIXTURE C-C, METHOD OF THEREOF OBTAINING AND METHOD OF CATALYTIC PYROLYSIS OF HYDROCARBON MIXTURE C-C IN LOWER OLEFINS C-C ON THIS CATALYST | 2015 |
|
RU2574725C1 |
| METHOD OF PRODUCING ETHYLENE FROM HYDROCARBON MATERIAL | 2014 |
|
RU2548002C1 |
| METHOD FOR ELECTROCHEMICAL CRACKING OF HYDROCARBON MATERIAL | 2011 |
|
RU2473666C1 |
| METHOD TO DERIVE LOW MOLECULAR WEIGHT OLEFINS FROM LIGHT HYDROCARBON MATERIAL | 2007 |
|
RU2326929C1 |
