SU542721A1 - Method for simultaneous production of hydrogen and gas for oxosynthesis - Google Patents

Description

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The invention relates to methods for the simultaneous production of hydrogen and gas for oxosynthesis and can be used in the petrochemical and chemical industries.

There is a known method for the simultaneous production of hydrogen and gas for oxo-hydrogen. In this case, the source gas is divided into two streams, of which one, going to produce hydrogen, is subjected to steam reforming, purification from oxide and carbon dioxide. The isolated carbon monoxide is mixed with a second stream of hydrocarbon gas and subjected to carbon-dioxide conversion in order to produce a gas for oxosynthesis.

However, according to a known method, carbon monoxide is converted, which leads to carbon dioxide, and carbon dioxide is lost in the formation of carbon dioxide, which is one of the main components of the gas for oxosynthesis. In addition, the consumption of waste hydrocarbon feedstock is overestimated, since the conversion is carried out in two separate plants for each stream: for the first - steam, for the second - steam carbonic acid.

In the proposed method, the hydrocarbons are subjected to carbon-acid conversion, purified from carbon dioxide and then returned to the conversion stage, and the converted gas is divided into two streams.

45-65 about. % of the first hydrogen stream is subjected to carbon monoxide purification and the carbon mixture recovered is mixed with the second stream of converted gas to produce oxosnitise gas.

The proposed method makes it possible to eliminate the steam reforming stage and siziz raw materials consumption by 12-20% for odinyarloe.

Example. 1000 im-hydrocarbon gas, for example ethane fraction, is mixed with 500 nm of water vapor and 100 im-carbon dioxide and sent at 450-500 ° C and 15 atm for catalytic conversion into a tube furnace, from which 7780 nm of converted gas , heated to 850-860 ° C, of the following composition,%: WITH ,, 13,92; CO 23.35; But 61.45; SP4 1.28. Then the converted gas is subjected to potash purification from carbon dioxide in the absorber iri 82 ° C. The selected 1000 carbon dioxide after regeneration of the absorbent is compressed in the compressor to a pressure of 15 atm and directed to blend with the ethane fraction, and the coivortous gas, which has, according to the temperature, composition,%: carbon dioxide 1, carbon monoxide 37.66, hydrogen 59, 20, methane 2.14, is compressed in a compressor to a pressure of 320 atm and separated into two streams. One stream, i.e., intended to produce technical hydrogen, is sent to the absorber for purification from carbon monoxide, for example, with a copper ammonia solution.

From the absorber comes 2981 nm of gas - the following composition,%: hydrogen 97.98, carbon monoxide 0.02, carbon dioxide 0.01, methane 1.99. The recovered absorption of absorbent carbon monoxide (1248.14 nm) is compressed to 320 atm and mixed with the second stream (2112.68 nm) of the converted gas going to receive gas for oxoxynthesis. After mixing, a 3579.71 nm gas of the following composition,%, is formed; hydrogen 49.1, carbon monoxide 49.08, carbon dioxide 0.76, methane 1.06.

Claims (1)

Claims The method of simultaneously producing hydrogen and gas for oxosynthesis, including the conversion of carbon-hydrogen, purification of the converted gas from carbon monoxide and carbon dioxide, characterized in that, in order to simplify the process and reduce the consumption of raw materials, hydrocarbons are subjected to carbon-dioxide conversion, carbon dioxide purification with its subsequent return to the conversion stage, and the converted gas is divided into two streams, the first of which is 45-65 vol. %, going to produce hydrogen, is purified from carbon monoxide and the emitted carbon monoxide is mixed with the second stream of converted gas to produce gas for oxosynthesis.