A kind of methanol gasoline heterogeneous corrosion inhibitor and its prepared methanol gasoline

A methanol gasoline and corrosion inhibitor technology, which is used in the petroleum industry, fuel additives, liquid carbon-containing fuels, etc. The high toxicity of hexylamine and other problems can reduce metal oxidation and conductivity, be beneficial to safety, environmental protection and healthy consumption, and inhibit electrochemical corrosion.

Active Publication Date: 2018-05-04
福建中源新能源股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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

Method used

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  • A kind of methanol gasoline heterogeneous corrosion inhibitor and its prepared methanol gasoline
  • A kind of methanol gasoline heterogeneous corrosion inhibitor and its prepared methanol gasoline
  • A kind of methanol gasoline heterogeneous corrosion inhibitor and its prepared methanol gasoline

Examples

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preparation example Construction

[0035] The preparation method of described methyl naphthalene bisquinoline quaternary ammonium salt may further comprise the steps:

[0036] (1) Dibromomethylnaphthalene and quinoline with a molar ratio of 1:2.11-1:2.20 are dropped into propanol whose mass is 4-5 times the total mass of dibromomethylnaphthalene and quinoline, mixed and dissolved to obtain a mixture ; The dibromomethylnaphthalene is 1,4-dibromomethylnaphthalene or 1,8-dibromomethylnaphthalene;

[0037](2) heating the mixture to 97-120° C., stirring and refluxing for 4-5 hours, discharging and cooling to obtain a crude product;

[0038] (3) The crude product was recrystallized twice with an anhydrous ethanol-ethyl acetate mixed solvent with a volume ratio of 2:1, filtered and dried to obtain a solid of methylnaphthalene bisquinoline quaternary ammonium salt.

[0039] The morpholine derivatives are N-methylmorpholine, fenfenmorpholine, 5,6-diphenyl-2-morpholinone, N-tert-butoxycarbonyl-(S)-2-morpholine methanol,...

Embodiment 1

[0046] A multiphase corrosion inhibitor for methanol gasoline, which is formed by mixing the following components by volume:

[0047]

[0048] It is prepared by mixing components in parts by volume at 55°C.

[0049] The structure of the 1,4-dibromomethylnaphthalene bisquinoline quaternary ammonium salt is shown in formula I.

[0050] The preparation method of described 1,4-dibromomethyl naphthalene bisquinoline quaternary ammonium salt comprises the following steps:

[0051] (1) Putting 1,4-dibromomethylnaphthalene and quinoline into 1,4-dibromomethylnaphthalene and quinoline with a molar ratio of 1:2.11 in propanol that is 4 times the total mass of 1,4-dibromomethylnaphthalene and quinoline, mixed and dissolved get the mixture;

[0052] (2) Heating the mixture to 108° C., stirring and refluxing for 4 hours, discharging and cooling to obtain a crude product;

[0053] (3) The crude product is recrystallized twice with a volume ratio of absolute ethanol-ethyl acetate mixed...

Embodiment 2

[0060] A multiphase corrosion inhibitor for methanol gasoline, which is formed by mixing the following components by volume:

[0061]

[0062] It is prepared by mixing components in parts by volume at 50°C.

[0063] The structure of the 1,8-dibromomethylnaphthalene bisquinoline quaternary ammonium salt is shown in formula II.

[0064] The preparation method of described 1,8-dibromomethyl naphthalene bisquinoline quaternary ammonium salt comprises the following steps:

[0065] (1) Put 1,8-dibromomethylnaphthalene and quinoline into 1,8-dibromomethylnaphthalene and quinoline with a molar ratio of 1:2.20 in propanol which is 5 times the total mass of 1,8-dibromomethylnaphthalene and quinoline, mix and dissolve get the mixture;

[0066] (2) Heating the mixture to 97° C., stirring and refluxing for 5 h, discharging and cooling to obtain a crude product;

[0067] (3) The crude product is recrystallized twice with a volume ratio of absolute ethanol-ethyl acetate mixed solvent o...

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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...

Claims

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): C10L1/02C07D215/10C10L1/232C10L1/233C10L1/182C10L10/04
CPCC07D215/10C10L1/02C10L1/14C10L1/182C10L1/232C10L1/2335C10L10/04
Inventor李隆梅王素伟陈居滨曾翠冰
Owner福建中源新能源股份有限公司