Metal inhibiter of methanol gasoline

Abstract

The invention relates to a metal inhibiter of methanol gasoline, belonging to the field of additives of alcohol ether substitute fuel of vehicles. The metal inhibiter of methanol gasoline is preparedfrom the following components by weight percent: 40-60 percent of fatty alcohol, 10-30 percent of rust inhibitor, 15-35 percent of alkenyl ester or ether and 3-8 percent of surface active agent. The invention has the characteristics of low cost, favorable anti-corrosion effect, simple preparation, and the like. By a soak test of yellow brass, red copper, 45# steel, aluminum, zinc and gasifier, thecorrosion resistance of the industrial product is the same as that of the merchantable gasoline; the test for comparing vehicles running 20 thousand kilometers shows that the metal inhibiter has obvious effect on metal corrosion resistance; and overhauling proves that the pressure of an engine cylinder is in a normal state, the corrosion condition of the cylinder is equivalent to that of the merchantable gasoline and the oil supply system and the gasifier are not obviously corroded. Accordingly, the invention has wide practical application value for promoting substituted fuel of methanol gasoline.

Description

1. Technical field [0001] The invention belongs to the field of automobile alcohol ether substitute fuel additives, in particular to methanol gasoline metal corrosion inhibitors. 2. Background technology [0002] Since the 1970s, methanol gasoline substitute fuel has become an important development direction of world energy development. Aldehydes and acids, such as formaldehyde and formic acid, are inevitably produced during the production and preparation of methanol gasoline. Methanol itself has strong water absorption. During storage and use, a small amount of organic acid will be produced by air oxidation and bacterial fermentation. These acids can cause corrosion and wear to the engine. Therefore, in order to solve this problem, there have been some patent achievements on the metal corrosion protection of alcohol fuels. For example, the invention patent of "Synthetic Environmental Protection Methanol Fuel" with the notification number CN100453625C discloses that the a...

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Problems solved by technology

For example, the invention patent of "Synthetic Environmental Protection Methanol Fuel" with the notification number CN100453625C discloses that the anti-corrosion and anti-adhesive agents are 2,6-di-tert-butyl p-cresol and potassium permanganate, which have a certain anti-oxidation effect on methanol gasoline. and anti-corrosion effect on metal, but the disadvantage is that potassium permanganate decomposes when it encounters methanol and ethanol, which limits the use; as the invention patent of "a kind of alcohol fuel metal corrosion inhibitor" of the announcement number CN1035825, it discloses benzene Triazole and dimerized linoleic acid components have obvious effects on inhibiting the corrosion of different metals, and can effectively inhibit the corrosion of alcohol fuels on brass, copper, 45# steel, zinc and other metals, but dimerized linoleic acid The addition of acid will have a certain impact on the acid value of alcohol fuels; as the invention patent of "ethanol gasoline anti-corrosion agent and its preparation method" of the notification number CN1156558C, it has a very obvious inhibitory effect on the metal copper corrosion of ethanol gasoline, but alcohol In the use of fuel, it will be in contact with multiple metals such as aluminum, zinc, iron, etc., so the scope of use is limited; as the patent of invention of "alcohol fuel additive for preventing metal corrosion and inhibiting rubber swelling" of publication number CN101280229A, it discloses anti-metal corrosion Components can effectively inhibit the corrosion of metals, and the effect is relatively obvious, but the phytic acid ester component in it is limited in use due to the existence of phosphorus, and cyclohexylamine has strong organic alkalinity, which makes methanol The base number of gasoline is affected; another example is "Research on the Formula of High Methanol-based Gasoline Alternative Fuel for Vehicles" published in the 6th issue of the journal "Fine Petrochemical Industry". Components such as organic acid amines, organic alcohol amines, and hindered phenols can inhibit metal corrosion, especially for copper, 45# steel, zinc, and gasifier materials, and significantly improve the corrosion inhibition effect on ferrous metals. However, organic ethanolamine, especially monoethanolamine, is an organic strong base compound, and there is a change in the base value of methanol gasoline

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