Stabilizer of methyl gasoline

Abstract

The invention relates to the field of additives of alcohol ether substituted fuel for vehicles, in particular to a stabilizer of methyl gasoline. The stabilizer of methyl gasoline is prepared from thefollowing components by weight percent: 40-70 percent of alkylamine, 18-50 percent of screen phenol, 5-12 percent of dispersant and 2-15 percent of metal passivator. The invention overcomes the defect of single component of antioxygen in the prior art, uses amine and phenol to resist oxygen, disperses the sediment particles, passivates and reduces the activity of soluble metal ion in oil according to the characteristics of combination of polarity and non-polarity of the methyl gasoline to restrain completely other than singly the oxidization and catalysis function to oil products. The four components are combined together to interact with each other to play a role of improving the stability of methyl gasoline. Tests prove that the invention has obvious effect on inhibiting the generationof colloid by storing the methyl gasoline at a normal temperature, and a batch test during an induction period shows that the methyl gasoline can reach the national GB17930-1999 standard in case of improving the induction period by 37 percent.

Description

1. Technical field [0001] The invention relates to the field of alcohol ether gasoline substitute fuel additives, in particular to a methanol gasoline stabilizer. 2. Background technology [0002] Methanol gasoline is an automobile substitute fuel mixed with methanol and gasoline in a certain proportion. The main component of methanol is a polar compound with high hygroscopicity. Tests have shown that the concentration of methanol drops from 100% to 78.1% after being stored in the open for 6 days , the water absorption from the air is as high as 21.9%. In the preparation process of methanol gasoline, methanol contains a small amount of organic acids and aldehydes, and these acidic substances will oxidize and catalyze the oil under the action of water. In addition, under the influence of light and temperature, olefins and diolefins in gasoline will produce active free radicals, which are easy to react with oxygen to form a series of oxidation intermediate products, which are...

AI Technical Summary

Problems solved by technology

For example, the invention patent of "an alcohol fuel metal corrosion inhibitor" with the notification number CN1035825C discloses the hindered phenolic antioxidant composition, which has certain stability to methanol gasoline, but the single component is relatively simple in inhibiting oil oxidation. The stabilizing effect is not very satisfactory, and this patent is mainly used in metal anticorrosion, rather than a special stabilizer; as the invention patent of "synthetic environmental protection methanol fuel" of the notification number CN100453625C, it is disclosed that the anticorrosion and anti-adhesive agent adopts 2,6-di Tert-butyl-p-cresol and potassium permanganate have beneficial anti-corrosion and anti-glue effects on methanol gasoline, and also have the effect of promoting stability, but potassium permanganate will decompose when it encounters methanol, so its use is limited; Notification number CN1167773C "environmental protection and energy-saving methanol gasoline" invention patent, and publication number CN101012395A "high proportion methanol gasoline" invention patent, both disclose the use of antioxidant 2,6-di-tert-butyl p-cresol as methanol gasoline The stabilizer additive has a certain anti-oxidation and stabilizing effect on methanol gasoline, but there is also a problem that the effect is not ideal enough for a single component instead of a dedicated stabilizer

Judging from the search situation, except for the use of single-component antioxidants, there is no literature that is directly used for methanol-gasoline compound stabilizers.

Images