TECHNOLOGY FOCUS - INSTRUMENTATION AND TESTING - Preferred Apparatus: (A) further comprises a heater disposed between heat exchanger unit and the reactor for further preheating (G1) prior supplying into the reactor; a condenser that condenses low volatility components of the product stream for separation from high volatility component; a formaldehyde rectifier; and a methanol rectifier downstream of the condenser. The heat exchange unit comprises a heat exchange portion of the reactor and/or an external heat exchanger. The heat exchange portion of the reactor comprises a heat exchanger encompassing at least a portion of the reactor (preferably downstream portion of reactor). The second supply unit is arranged at a location of the reactor where formation of methanol and formaldehyde is completed. The control unit adjusts the second supply unit based on at least one operating parameters such as temperature.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Process: The oxidation is partial oxidation without a catalyst, and the mixture is homogeneous. The transfer of heat from the product stream to the hydrocarbon containing gas at least partially heats (G1), which is further heated to provide a heated (G1). The heat is transferred from the product stream to the (G1) in heat exchange portion of the reactor and/or in an external heat exchanger downstream of the reactor. Supplying cold hydrocarbon containing gas into the reactor includes supplying (G1) into the reactor at the stage when formation of methanol and formaldehyde is completed or adjusting the quantity of (G1) to regulate the extent of decomposition of formaldehyde in rector. The cold hydrocarbon containing gas is colder than heated (G1).Preferred Product: The product stream comprises a relatively high volatility component and a relatively low volatility component separated from one another. The high volatility component comprises at least a portion of the formaldehyde of the product stream or all of the formaldehyde. The low volatility component comprises methanol, ethanol and water and subsequent processing provides a purified methanol stream or comprises at least a portion of the formaldehyde of the product stream or all of the formaldehyde and subsequent processing separates formaldehyde from less volatile components and provides relatively purified formaldehyde and subsequent processing provides purified methanol. EXAMPLE - Hydrocarbon containing gas having 98% methane content was introduced into an apparatus having capacity of 6000 t/year and is heated at 430 - 470degreesC. The heated reaction mixture was supplied into the reaction zone. Oxygen was supplied by the compressor. The mixture was separated into highly volatile gases and low volatility liquids. When the formation of methanol and formaldehyde was completed, cold gas was introduced to reduce the temperature of the final period of the reaction. The reaction temperature reaches its maximum, and in the reaction mixture methanol (yield: 800 kg/h) and formaldehyde (yield: 230 kg/h) were produced compared to reaction carried out without cooling in which methanol and formaldehyde were obtained in 800 and 115 kg/h, respectively.