Industrial fuel gas for metal cutting and welding
An industrial gas and metal cutting technology, which is applied in the field of ether hydrocarbon gas, can solve the problems of unsatisfactory welding performance and achieve the effects of saving labor hours, easy degradation and improving work efficiency
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Embodiment 1
[0035] Add 0.05Kg of liquefied petroleum gas into the steel cylinder, and then inject 49.95Kg of dimethyl ether to obtain an industrial gas product containing 99.9% of dimethyl ether and 0.1% of liquefied petroleum gas.
[0036] The dimethyl ether uses methanol as a raw material. In the presence of a zeolite catalyst, dehydration reaction is carried out under the condition of 200-400° C. to generate crude dimethyl ether, which is then separated by rectification to obtain dimethyl ether.
Embodiment 2
[0038] Add 0.05Kg of butane and 0.05Kg of propylene into the steel cylinder in turn, and then inject 40Kg of dimethyl ether to obtain an industrial gas product containing 80% of dimethyl ether, 10% of butane and 10% of propylene.
[0039] Described dimethyl ether is to be raw material with crude methanol, in γ-Al 2 o 3 In the presence of a catalyst, the dehydration reaction is carried out at 200-400°C to generate crude dimethyl ether, which is then separated by rectification to obtain dimethyl ether.
Embodiment 3
[0041] Add 0.05Kg of liquefied petroleum gas and 0.10Kg of propane into the steel cylinder in turn, and then inject 35Kg of dimethyl ether to obtain an industrial gas product containing 70% of dimethyl ether, 10% of liquefied petroleum gas and 20% of propane.
[0042] Described dimethyl ether is to be raw material with methanol, in gamma-Al 2 o 3 In the presence of a catalyst, the dehydration reaction is carried out at 200-400°C to generate crude dimethyl ether, which is then separated by rectification to obtain dimethyl ether.
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