CN110684568A

CN110684568A - Primary oil additive, primary oil and preparation method thereof

Info

Publication number: CN110684568A
Application number: CN201911057974.2A
Authority: CN
Inventors: 张超; 梁万根; 马雪菲; 崔卫华; 杨聪; 宋吻吻; 崔振杰; 靖培培
Original assignee: Shandong Efirm Biochemistry and Environmental Protection Co Ltd
Current assignee: Shandong Efirm Biochemistry and Environmental Protection Co Ltd
Priority date: 2019-10-31
Filing date: 2019-10-31
Publication date: 2020-01-14

Abstract

The invention belongs to the field of petrochemical industry, and particularly relates to a primary oil additive, primary oil and a preparation method thereof, wherein the primary oil additive consists of an antioxidant, a corrosion inhibitor, a detergent dispersant and a cosolvent, has better corrosion resistance, can be adsorbed on the inner surface of an engine, prevents corrosive components in oil products from corroding the engine, protects the engine and prolongs the service cycle of the engine; meanwhile, the auxiliary agent has good oxidation resistance, and the primary oil formed by combining the auxiliary agent with isopentane, isohexane, isooctane, alkylated gasoline, methyl tert-butyl ether, raffinate oil and toluene can react with unstable free radicals in the primary oil to terminate chain reaction in the fuel oxidation process and eliminate the free radicals, so that the primary oil is in a stable state, the storage time of an engine and an oil product is prolonged, and the auxiliary agent has good cold starting performance, combustion performance and power performance, and after the primary oil is combusted, the combustion efficiency of the engine is high, the oil consumption is low, and the tail gas emission is less.

Description

Primary oil additive, primary oil and preparation method thereof

Technical Field

The invention belongs to the technical field of petrochemical industry, and particularly relates to a primary oil additive, primary oil and a preparation method thereof.

Background

The initial oil is the first barrel of fuel oil of the engine, and after a new vehicle is off-line, certain fuel oil needs to be added to better match the requirement of the engine and improve the utilization efficiency of fuel oil; meanwhile, due to the particularity of the using conditions of the initial oil and the uncertainty of the using period, the antirust performance and the stability of the initial oil are also particularly important, and the performance is difficult to improve by simple component adjustment, so that a certain auxiliary agent needs to be added to improve the antirust performance and the stability of the initial oil.

Patent CN 105419887A invented a primary oil, which is composed of isooctane, benzene-making raffinate oil, methyl tert-butyl ether, isopentane, stable light hydrocarbon and antistatic agent, the technical scheme satisfies indexes such as saturated vapor pressure, distillation range and copper sheet corrosion, but lacks corresponding countermeasures which influence the corrosivity and oxidation resistance of the product to the engine, such as steel corrosion and latent colloid; because the initial oil is added when a new vehicle is off-line, the storage time is influenced by the sales condition, the storage time is possibly longer, and meanwhile, the vehicle sales regions have larger difference, so that the temperature difference is huge, and the requirements on the stability, oxidation resistance and rust resistance of the initial oil are strict. The steel corrosion is one of the evaluation indexes of the rust resistance, the latent colloid is one of the evaluation indexes of the stability and the oxidation resistance, and the prior art has no corresponding solution aiming at the important influence factors, the provided initial oil is difficult to meet the requirements of the factors, the quality of the initial oil is uneven, the efficiency of an automobile engine is further reduced, and other series of problems.

Disclosure of Invention

The invention aims to provide a primary oil additive, primary oil and a preparation method thereof, wherein the primary oil additive consists of an antioxidant, a corrosion inhibitor, a detergent dispersant and a cosolvent, has better corrosion resistance, can be adsorbed on the inner surface of an engine, prevents corrosive components in oil products from corroding the engine, protects the engine and prolongs the service cycle of the engine; meanwhile, the auxiliary agent has good oxidation resistance, and the primary oil formed by combining the auxiliary agent with isopentane, isohexane, isooctane, alkylated gasoline, methyl tert-butyl ether, raffinate oil and toluene can react with unstable free radicals in the primary oil to terminate chain reaction in the fuel oxidation process and eliminate the free radicals, so that the primary oil is in a stable state, the storage time of an engine and an oil product is prolonged, and the auxiliary agent has good cold starting performance, combustion performance and power performance, and after the primary oil is combusted, the combustion efficiency of the engine is high, the oil consumption is low, and the tail gas emission is less.

The invention firstly provides a primary oil-filling auxiliary agent, which comprises the following components in parts by weight:

among them, the antioxidant is preferably one or more selected from 2, 6-di-tert-butylphenol, 2, 6-di-tert-butyl-p-cresol, N, N-diethylhydroxylamine, dicyclohexylamine, N-phenyl-alpha-naphthylamine, 4, 4-methylenebis (2, 6-di-tert-butylphenol), N, N-di-sec-butyl-p-phenylenediamine and the like.

Preferably, the corrosion inhibitor is one or more selected from dodecenylsuccinic acid, benzotriazole, oleic hydroxyethyl imidazoline, N-benzyl pyridine and tetradecenyl succinic acid.

Preferably, the detergent dispersant is one or more selected from polyether amine, polyisobutylene succinimide and polyisobutylene amine.

Preferably, the cosolvent is selected from mixed alkanes and aromatic solvents of C6-C12: 120# solvent oil, 200# solvent oil, dearomatized solvent oil D40, dearomatized solvent oil D60.

Among the above-mentioned auxiliaries, the antioxidant is used for improving the oxidation resistance of the primary oil, and under the existence of oxygen, the antioxidant is subjected to the catalytic action of heat, light, metal and the like, so that the storage stability of the oil product is deteriorated, a hydrocarbon chain is damaged, and the polymerization reaction of hydrocarbon molecules is initiated, and the antioxidant can terminate the chain reaction, so that a macromolecular polymer, namely a latent colloid, cannot be formed, thereby improving the storage stability of the oil product, being suitable for the actual condition that the sale time of a new vehicle is uncertain, and greatly prolonging the shelf life of the primary oil. The antioxidant and the detergent dispersant have synergistic effect, so that the antioxidant improves the storage stability of the primary oil, ensures that no macromolecular colloid is formed in the storage period, and prolongs the storage period; the detergent dispersant improves the thermal stability of the initially-charged oil during combustion, ensures that no macromolecular colloid is formed in the combustion process, effectively keeps the engine clean, and prolongs the service life of the engine.

The cleaning dispersant is used for improving the cleaning performance of the primary oil, and the primary oil added with the cleaning dispersant can better disperse colloid, asphaltene and carbon blue components formed by high-temperature oil gas under the action of oxygen, so that the components are prevented from being aggregated on an oil nozzle and the inner wall of an engine, the injection path and the injection direction of the oil nozzle are changed, the volume of the engine is reduced, the compression ratio is changed, and the fuel utilization rate is reduced. The addition of the cleaning dispersant can inhibit the generation of fuel system deposit, disperse and clean the generated oxidized deposit, and ensure good dynamic property of the automobile.

The corrosion inhibitor is used in the initial oil filling to improve the corrosion resistance of the oil product, preferably, the nitrogen-containing and carboxylic acid-type corrosion inhibitor has good intersolubility with the oil product, and the selected corrosion inhibitor can be adsorbed on the inner surface of the metal of the engine to effectively prevent the corrosion of acid components containing S, Cl and the like on the metal on the surface of the engine, thereby prolonging the service life of the engine.

The cosolvent can help the components to be well mixed with other components of the initial oil, and a better effect is achieved.

Based on the above dosage range, more preferably, the initial oil filling auxiliary agent comprises the following components:

on the basis of the primary oil-filling auxiliary agent, the inventor further provides a corresponding primary oil-filling formula, which comprises the following specific components in parts by weight:

wherein the dosage of the primary oil-filling auxiliary agent is as follows: 300-1000mg/kg of primary oil;

octane number RON95-96 of the alkylated gasoline;

the inventor finds that 70 ℃, 100 ℃ and 125 ℃ evaporation volumes have great influence on combustion performance and dynamic performance of the engine under cold start on the basis of a large number of experiments, and finds that the matching performance of octane number 95# gasoline under cold start, the combustion performance and the dynamic performance is the best when the evaporation volume at 70 ℃, the evaporation volume at 100 ℃ and the evaporation volume at 125 ℃ are within the index range of 20-40mL, 60-80mL and more than 92mL, and the application effect is the best; the inventor finds that the finished gasoline meets the induction period of more than 1000min, the induction period (heavy metal condition) of more than 250min, the total latent colloid is less than 1mg/100mL, and the storage period of the oil product can be prolonged by more than 6 months compared with the normal gasoline, and the steel index corrosion has no obvious corrosion performance to each casting of an engine when the steel index corrosion is less than the moderate corrosion index.

Therefore, the primary oil compounded according to the proportion can ensure that the octane number is between 95 and 96, all indexes meet the national VIB index requirement of GB17930-2016 (motor gasoline) research octane number 95#, and simultaneously, the induction period (heavy metal condition), the total latent colloid, the steel finger corrosion, the evaporation volume at 70 ℃, the evaporation volume at 100 ℃ and the evaporation volume at 125 ℃ meet the best performance matching indexes discovered by the inventor, so that the good stability, corrosion inhibition performance, oxidation resistance, starting performance, combustion performance and power performance of the primary oil obtained by the invention are ensured.

The preparation method of the primary oil-filling auxiliary agent comprises the following steps:

adding a corrosion inhibitor into a cosolvent, and mixing to obtain a mixed solution a; adding a detergent dispersant into the mixed solution a, and mixing to obtain a mixed solution b; and (4) adding an antioxidant into the mixed solution b, and uniformly mixing to obtain the primary oil filling auxiliary agent.

The preparation method of the initial oil comprises the following steps:

weighing the formula amount of the alkylated gasoline, adding the alkylated gasoline into a blending tank, starting a circulating pump, pumping the alkylated gasoline into the formula amount of isopentane, isohexane, isooctane, methyl tert-butyl ether, raffinate oil, toluene and primary oil auxiliary agent in sequence by using the pump, and continuously circulating for 2 hours after all the alkylated gasoline is added to obtain the finished product primary oil.

The inventor finally obtains the composition of the initially-filled oil additive and the corresponding initially-filled oil composition through long-term practice and a large number of experiments, wherein the initially-filled oil additive has better corrosion resistance and can be adsorbed on the inner surface of an engine to prevent corrosive components in oil products from corroding the engine, protect the engine and prolong the service life of the engine; the initial oil is mainly used for gasoline engines or ethanol gasoline engines, and cannot be directly applied to engines with other fuels.

Meanwhile, the additive has good oxidation resistance, and can react with unstable free radicals in the primary oil when added into the primary oil, terminate chain reaction in the fuel oxidation process, eliminate the free radicals, enable the primary oil to be in a stable state, and prolong the storage time of an engine and an oil product. Thereby overcoming various defects of the prior primary oil and obtaining the best using effect.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example 1

The initial oil filling auxiliary agent comprises the following components in percentage by weight:

preferably, the antioxidant is selected from 2, 6-di-tert-butylphenol.

Preferably, the corrosion inhibitor is selected from tetradecenyl succinic acid and oleic hydroxyethyl imidazoline which are compounded according to the mass ratio of 1: 5.

Preferably, the detergent dispersant is selected from polyether amine and polyisobutene amine compounded product according to the mass ratio of 1: 1.

Preferably, the cosolvent is selected from No. 120 mineral spirits.

On the basis of the primary oil-filling auxiliary agent, the inventor further provides a corresponding primary oil-filling formula, which comprises the following specific components in percentage by weight:

isopentane: 6 percent of

Isohexane: 4 percent of

Isooctane: 8 percent of

Alkylated gasoline: 60 percent of

Methyl tert-butyl ether: 10 percent of

Raffinate oil extraction: 8 percent of

Toluene: 4 percent;

the dosage of the primary oil-filling auxiliary agent is as follows: 1000mg/kg of primary oil;

the preparation method of the primary oil loading auxiliary agent and the primary oil loading comprises the following steps:

compounding tetradecenyl succinic acid and oleic hydroxyethyl imidazoline according to the mass ratio of 1: 5, adding the mixture into No. 120 solvent oil, and mixing to obtain a mixed solution a; adding a substance compounded by polyether amine and polyisobutylene amine according to the mass ratio of 1: 1 into the mixed solution a, and mixing to obtain a mixed solution b; and (3) adding 2, 6-di-tert-butylphenol into the mixed solution b, and uniformly mixing to obtain the primary oil filling auxiliary agent.

The preparation method of the initial oil comprises the following steps:

weighing the alkylated gasoline according to the formula amount, adding the alkylated gasoline into a blending tank, starting a circulating pump, pumping the alkylated gasoline, the isopentane, the isohexane, the isooctane, the methyl tert-butyl ether, the raffinate oil, the toluene and the primary oil additive according to the formula amount in sequence by using the pump, and continuously circulating for 2 hours after all the alkylated gasoline is added to obtain the finished primary oil.

Example 2

wherein, the antioxidant is preferably selected from 2, 6-di-tert-butyl-p-cresol;

preferably, the corrosion inhibitor is selected from benzotriazole;

preferably, the detergent dispersant is selected from the group consisting of polyisobutylene amine;

preferably, the co-solvent is selected from dearomatized solvent oil D60;

isopentane: 10 percent of

Isohexane: 6 percent of

Isooctane: 3 percent of

Alkylated gasoline: 55 percent of

Methyl tert-butyl ether: 12 percent of

Raffinate oil extraction: 10 percent of

Toluene: 4 percent;

the dosage of the primary oil-filling auxiliary agent is as follows: 300mg/kg of primary oil;

adding benzotriazole into dearomatized solvent oil D60, and mixing to obtain a mixed solution a; adding polyisobutene amine into the mixed solution a, and mixing to obtain a mixed solution b; and (3) adding 2, 6-di-tert-butyl-p-cresol into the mixed solution b, and uniformly mixing to obtain the primary oil filling auxiliary agent.

The preparation method of the initial oil comprises the following steps:

Example 3

wherein, the antioxidant is preferably selected from N, N-di-sec-butyl-p-phenylenediamine,

preferably, the corrosion inhibitor is selected from the group consisting of dodecenylsuccinic acid,

preferably, the detergent dispersant is selected from polyisobutylene succinimide,

preferably, the cosolvent is selected from No. 200 solvent oil;

isopentane: 8 percent of

Isohexane: 5 percent of

Isooctane: 5 percent of

Alkylated gasoline: 58 percent of

Methyl tert-butyl ether: 11 percent of

Raffinate oil extraction: 8.4 percent

Toluene: 4.6 percent;

the dosage of the primary oil-filling auxiliary agent is as follows: 600mg/kg of primary oil;

adding dodecenylsuccinic acid into dearomatized solvent oil D60, and mixing to obtain a mixed solution a; adding polyisobutylene succinimide into the mixed solution a, and mixing to obtain a mixed solution b; and adding N, N-di-sec-butyl-p-phenylenediamine into the mixed solution b, and uniformly mixing to obtain the primary oil filling auxiliary agent.

The preparation method of the initial oil comprises the following steps:

weighing the formula amount of the alkylated gasoline, adding the alkylated gasoline into a blending tank, starting a circulating pump, then sequentially pumping the weighed formula amount of isopentane, isohexane, isooctane, methyl tert-butyl ether, raffinate oil, toluene and primary oil additive by using the pump, and continuously circulating for 2 hours after all the alkylated gasoline is added to obtain the finished product primary oil.

Experimental example:

the as-filled oils prepared in examples 1-3, and the as-filled oils of examples 1-3 without the addition of the as-filled oil adjuvant were tested for correlation properties, and the results were as follows:

initial oil loading index for the preparations of examples 1-3:

TABLE 1 relevant indices for initial oil made in examples 1-3

TABLE 2 initial oil loading related indices for examples 1-3 without addition of initial oil loading adjuvant

Compared with the index detection results before and after the addition of the auxiliary agent in the examples 1-3, the prepared initial oil product without the initial oil auxiliary agent has ideal indexes such as induction period, solvent washing colloid content, copper sheet corrosion kettle and the like, and can meet the independently optimized index requirements of evaporation volume at the temperature of 70 ℃, 100 ℃ and 125 ℃, but has no obvious effect on several harsh indexes such as steel finger corrosion, total latent colloid, heavy metal condition induction period and the like, and the initial oil obtained by the examples 1-3 compounded by adding the initial oil auxiliary agent has good performance, particularly the steel finger corrosion, the total latent colloid and the heavy metal condition induction period performance are obviously improved, so that the method has great progress compared with the prior art. The preferable blending formula and blending index of the initial oil and the synergistic effect of the initial oil and the initial oil additive jointly ensure that the product has ideal effects on corrosion inhibition, oxidation resistance, detergency, low-temperature startability, combustibility and power performance.

Claims

1. The primary oil-filling auxiliary agent is characterized in that: the auxiliary agent comprises the following components in parts by weight:

antioxidant: 15-30 parts of

Corrosion inhibitors: 5-25 parts of

Cleaning dispersant: 15-40 parts of

Cosolvent: 30-60 parts.

2. A top-loading oil aid as recited in claim 1, wherein:

the antioxidant is selected from one or more of 2, 6-di-tert-butylphenol, 2, 6-di-tert-butyl-p-cresol, N, N-diethylhydroxylamine, dicyclohexylamine, N-phenyl-alpha-naphthylamine, 4, 4-methylenebis (2, 6-di-tert-butylphenol) and N, N-di-sec-butyl-p-phenylenediamine;

the corrosion inhibitor is one or more selected from dodecenylsuccinic acid, benzotriazole, oleic hydroxyethyl imidazoline, N-benzyl pyridine and tetradecenyl succinic acid;

the detergent dispersant is selected from one or more of polyether amine, polyisobutylene succinimide and polyisobutylene amine;

the cosolvent is selected from one or more of mixed alkanes of C6-C12, 120# solvent oil, 200# solvent oil, dearomatized solvent oil D40 and dearomatized solvent oil D60.

3. A top-loading oil aid as recited in claim 1, wherein: the auxiliary agent comprises the following components in parts by weight:

antioxidant: 20-25 parts of

Corrosion inhibitors: 10-15 parts of

Cleaning dispersant: 20-30 parts of

Cosolvent: 30-50 parts.

4. The method for preparing the primary oil additive according to claim 1, wherein: the method comprises the following specific steps:

5. A first-filled oil is characterized in that: the concrete components are as follows by weight:

isopentane: 6-10 parts of

Isohexane: 4 to 6 portions of

Isooctane: 3-8 parts of

Alkylated gasoline: 55 to 60 portions of

Methyl tert-butyl ether: 10-12 parts of

Raffinate oil extraction: 8-10 parts of

Toluene: 4-4.6 parts;

wherein the dosage of the primary oil-filling auxiliary agent is as follows: 300-1000mg/kg of primary oil.

6. A method for preparing a primary oil according to claim 5, wherein: the method comprises the following specific steps: