METHOD OF PRODUCTION OF METHANOL AND PLANT FOR REALIZATION OF THIS METHOD Russian patent published in 2004 - IPC

FIELD: updated methods of production of methanol by direct oxidation of hydrocarbon-containing gas.

SUBSTANCE: proposed method includes delivery of heated hydrocarbon gas and compressed air to mixing unit of reactor which is located in its riding-up portion followed by direct oxidation of hydrocarbon gas, cooling and separation of reaction mixture; after cooling, reaction mixture is separated into waste gases and liquid products; raw methanol is subjected to regeneration at separation of methanol and removal of waste gases; oxidation of hydrocarbon gas is performed at two stages: homogeneous oxidation in tubular portion of reactor and subsequent heterogeneous oxidation in inter-tube portion of reactor with use of two-layer catalyst at temperature of 390-490 C and pressure of 8.0 Mpa; cooling of reaction mixture in performed first in gas-to-gas heat exchanger and then in air cooling apparatus. Plant proposed for realization of this method includes hydrocarbon gas source, reactor for oxidation of methane provided with unit for mixing the compressed air and heated methane before reaction, unit for cooling the mixture before separation, separator for separation of reaction products into waste gases and raw methanol and raw methanol regeneration unit; hydrocarbon gas source is located on complex gas preparation plant; reactor consists of two zones: one zone is reaction zone for homogeneous oxidation and other zone is used for heterogeneous oxidation by means of two-layer catalyst; first layer is metal-containing catalyst for enhancing selectivity and second layer contains Mg, Zn, Ba, Zr for oxidation of formaldehyde; homogeneous reaction is performed in reactor tubes and heterogeneous reaction is performed in inter-tube space of reactor filled with two-layer catalyst ; reactor is provided with multi-channel thermocouple, cooling unit consisting of gas-to-gas heat exchanger and air cooling apparatus which are connected with reactor, complex gas preparation unit and separator connected with raw methanol regeneration unit.

EFFECT: saving of energy; facilitated procedure.

3 cl, 2 dwg, 1 tbl