Methanol gasoline multi-phase corrosion inhibitor and methanol gasoline prepared from same

Abstract

The invention discloses a methanol gasoline multi-phase corrosion inhibitor which is prepared by mixing the following components: a methylnaphthalene biquinoline quaternary ammonium salt, a morpholine derivative, propargyl alcohol and a leveling agent. The invention further discloses methanol gasoline which is prepared from the methanol gasoline multi-phase corrosion inhibitor. The methanol gasoline is prepared from the following components: the methanol gasoline multi-phase corrosion inhibitor, methanol, gasoline, naphtha and butanol. The methanol gasoline multi-phase corrosion inhibitor disclosed by the invention is free of raw material 'which is harmful to vehicle reliability and aftertreatment systems', also free of suspected carcinogens such as nitrite and benzene, relatively good in corrosion inhibition function on metal surfaces, and excellent in electric-chemical corrosion inhibition function on gas-liquid-gas-liquid multi-phase systems; the raw materials can meet national standard requirements and are beneficial to security, environment-friendliness and healthy consumption; the corrosion of methanol gasoline to metals can be remarkably alleviated by using a small amount of the corrosion inhibitor (which accounts for 0.1-0.2% of the total weight of finished product oil).

Description

technical field [0001] The invention relates to a corrosion inhibitor for methanol gasoline, in particular to a corrosion inhibitor with excellent electrochemical anticorrosion function in multiple phases such as gas, liquid and gas-liquid, and methanol gasoline prepared with the corrosion inhibitor. Background technique [0002] One of the biggest technical problems encountered in the popularization and use of methanol and other alcohol fuels is that they will corrode metal parts, including steel, copper, aluminum, zinc and alloys. Adding corrosion inhibitors to alcohol fuels is by far the most effective way to overcome this problem. Corrosion inhibitors can be roughly divided into two categories: inorganic and organic corrosion inhibitors according to their chemical composition. Inorganic corrosion inhibitors mainly include phosphates, polyphosphates, nitrates, nitrites, molybdates and silicates, etc., which can chemically react with the metal surface and passivate the su...

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Problems solved by technology

(2) The raw materials have health and safety hazards. For example, the dicyclohexylamine nitrite selected by Chinese patent CN 100580064C has high toxicity; Butyl, if not handled properly, it is easy to cause deflagration

(3) The corrosion inhibition effect is not good, for example, the additive that CN 101544825A discloses has corrosion inhibition, anti-swelling and anti-corrosion effects on alcohol-based gasoline is a macromolecular compound, because its solubility and permeability are not as good as small molecular compounds, so It is prone to covering vacancies on the metal surface, causing cavitation corrosion and reducing its corrosion inhibition ability

(4) There is no multi-phase corrosion inhibition mechanism. Alcohol fuel will contact the metal surface in gas phase, liquid phase or gas-liquid phase during the process of production, transportation, storage and use, which not only involves single-phase electrochemical corrosion prevention Corrosion, however, the corrosion inhibition scheme of the existing public technology basically only considers the liquid phase corrosion protection of alcohol fuel, and lacks technical measures to prevent electrochemical corrosion of gas phase, gas-liquid equilibrium systems

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