MXPA97010418A - Composition of multifunctional additive for gasolines based on detergent-dispersan agents - Google Patents

Abstract

A multifunctional additive composition for gasolines with or without lead with or without oxygenates, based on a detergent-dispersant agent such as polyisobutylene succinimide or polybutylamine or polypropyl amine in a proportion of 20 to 95% but preferably 40 to 80% by weight, a fluidizer or carrier synthetic type polyester in the proportion of 0 to 50% but preferably 5 to 40% by weight, whose chemical nature is of the polyether type, ethylene oxide, propylene oxide and butylene oxide, whether homopolymer or copolymers; an aromatic solvent in the proportion of 0 60% but preferably 10 to 50% by weight and can be benzene, toluene and xylene or their mixture, a corrosion inhibitor in the proportion of 1 to 10% by weight but preferably 1 to 8% by weight, belonging to the chemical family of amine salts of carboxylic acids and a demulsifying agent of the phenolic resin type, oxyalkylase alone or with mixtures of acylated and sulphonated polyglocols in a proportion of 0 to 5% p that but preferably from 0 to 3% pe

Description

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COMPOSITION OF MULTIFUNCTIONAL ADDITIVE FOR GASOLINES BASED ON DETERGENT AGENTS-DISPERSANTS DESCRIPTION TECHNICAL FIELD OF THE INVENTION The present invention relates to a multi-purpose additive composition for gasolines with and without lead, with and without oxygenated components such as methyl terbutyl ether (MTBE). In the composition, a detergent-dispersing agent of the polyisobutylsuccinimide type, or polybutylamine, or polypropylamine, is used as the basic ingredient; a fluidising agent-carrier of synthetic origin type polyether; a demulsifying agent, a corrosion inhibitor and a solvent or solvent mixture of the aromatic type.

This composition of multifunctional additive imparts to the gasoline characteristics that favor the good behavior of the internal combustion engines, reducing the formation of deposits in the fuel intake and injector systems and with it the polluting emissions to the environment. The composition also improves the manageability and corrosion inhibition characteristics of the metal parts with which the fuel is in contact as well as the demulsifying properties that promote the immediate separation of gasoline-water emulsions that are eventually formed during handling. and storage of gasolines.

The incorporation of this additive to gasolines, imparts the necessary characteristics to meet the requirements set by environmental regulations.

BACKGROUND OF THE INVENTION Technological advances in the automotive industry demand improvements in the composition of fuels that operate internal combustion engines. Currently, both the automotive industry and the oil industry work in a coordinated manner for the production of motor vehicles and fuels with which greater efficiency is achieved in addition to reducing as much as possible the emission of polluting gases into the atmosphere.

As a result of the combustion of the hydrocarbons that make up the gasoline, in this type of engines carbon deposits are deposited in the different parts of the fuel intake system and injectors, which translates into a low efficiency of the engine, causing it has poor handling and a greater emission of unburned hydrocarbons, carbon monoxide and oxides of nitrogen into the atmosphere.

The current technology in additive chemistry, to maintain or reduce the formation of deposits, consists of the use of detergent-dispersing agents that are the basis of the multifunctional additives. These agents, once solubilized in the fuel, keep the injectors and intake valves clean, reducing the problems of air pollution.

In recent years, numerous multifunctional additives have been developed with detergent properties for gasolines that reduce the formation of deposits in automotive intake systems; The detergent agents of these additives belong basically to the chemical families of the polyalkenyl succinimides, polyether amines, polyalkylamines, polyalkylphenols, etc. Particularly in the Mexican patents 139 196 and 169 701 are described multifunctional additive compositions containing detergent-dispersing agents whose chemical nature is of the type of aliphatic amines and polyalkenyl succinimides.

Based on the above, applicants have developed a composition of multifunctional additive for gasoline that reduces the formation of deposits in the intake system as established in international environmental regulations, both in the cleaning of injectors and in intake valves that also eliminates the formation of gasoline-water emulsions and avoids the corrosion of metal parts that come into contact with gasoline.

National patent No. 139196 of the same owner hereby protects an improved detergent composition as a gasoline additive, comprising a mixture of an oleylamine and a heavy neutral oil.

The national patent No. 169701 pertaining to the owner hereof, refers to a detergent-dispersant additive for gasoline constituted by a mixture of a mineral naphthenic type oil, a polymeric dispersant and an aromatic solvent, which is applied to reduce the emission of pollutants in automotive vehicles.

The patent application No. 9406194 pertaining to this holder, describes and claims an improved detergent-dispersant additive for gasoline composed of a combination of a polyisobutylene-succinimide, a naphthenic-type mineral oil, an amine salt of carboxylic acid, an ethoxylated demulsifier. -propoxylated and an aromatic solvent.

SUMMARY OF THE INVENTION The present invention relates to multifunctional additives for gasolines used in automotive vehicles based on a detergent-dispersant agent such as polyisobutylenesuccinimide or polybutylamine or polypropylamine which additionally has corrosion inhibiting and demulsifying action. The composition comprises at least five fundamental components: 1) Polymeric dispersing detergent agent of the polyisobutylensuccinimide or polybutylamine or polypropyl amine type 2) Fluidizer or carrier of the type of chemical compounds called polyethers (homopolymers or copolymers of ethylene, propylene and butylene oxides) 3) Aliphatic, naphthenic or aromatic hydrocarbon solvent, preferably of the latter 4) Corrosion inhibitor derived from salts of carboxylic acids 5) Demulsifier of organic nature polymeric type It is therefore an object of the present invention to provide a multifunctional additive composition for gasolines based on a detergent-dispersant agent type PIBSI, PBA or PPA useful to avoid the formation of deposits in the system of admission of fuel and injectors of automotive vehicles.

Another object of the present invention is to provide a multifunctional additive composition, which, when incorporated into gasolines, acquires these behavioral characteristics and complies with the environmental regulations that are established.

Another object of the present invention is to provide a multifunctional additive composition useful for reducing pollutant emissions to the environment caused by the combustion of gasolines in vehicles with internal combustion engines.

Another object of the invention is to provide a multifunctional additive composition that prevents corrosion in the metal parts with which the fuel is in contact during handling.

Another object of the invention is to provide a multifunctional additive composition for gasoline which prevents the formation of water-fuel emulsions.

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a composition of multifunctional additive for gasoline, useful to avoid the formation of deposits and keep the fuel intake system of motor vehicles clean, to avoid corrosion of the metallic parts with which it is in contact with. fuel, avoid the formation of water-fuel emulsions and reduce the polluting gases emitted by the vehicles, complying with the environmental regulations in this matter.

The multifunctional additives for gasolines of the present invention are constituted by a polymeric detergent-dispersant agent of the chemical family of polyisobutylene-succinimide or polybutylamine or polypropylamine, a fluidizing agent-carrier type polyether homopolymer or copolymers of ethylene oxide, propylene oxide or butylene oxide, a corrosion inhibitor, a demulsifying agent and a solvent preferably of the aromatic type.

The composition of multifunctional additives for gasolines object of the present invention is composed of the following components and proportions: COMPOSITION COMPOSITION RECOMMENDED PREFERENCE% WEIGHT% WEIGHT Polyisobutylensuccinimide or Polybutylamine or 20-95 40-80 Polypropylamine Polieter 0-50 5-40 Aromatic solvent 0-60 10-50 Corrosion inhibitor 0-10 1-8 Demulsifier 0-5 0-3 The practical use of the composition, which is perfectly soluble in gasoline, is carried out in dosages of the order of 50 to 500 ppm but preferably 100 to 300 ppm.

The procedure for the preparation of multifunctional additives for gasoline is carried out in the following mr: In a stirred steel vessel, free of contaminants and solids provided with heating elements, polyisobutylene succinimide or polybutylamine or polypropylene amine, the polyether type fluidizer-carrier and the aromatic hydrocarbon solvent are mixed in the appropriate proportions within a range of temperature between 35-45 ° C under conditions of atmospheric pressure and continuous agitation for 45 minutes at the end of which the corrosion inhibitor is added slowly and carefully and finally the demulsifier maintaining the agitation regime for 15 more minutes until obtaining of a homogeneous mixture.

It is allowed to cool to room temperature and samples are taken from the bottom, the middle part and the top of the agitation tank.

In table 1, the typical physicochemical characteristics of the multifunctional additives are shown.

T A B L A 1 CHARACTERISTICS OF MULTIFUNCTIONAL ADDITIVES FOR GASOLINES BASED ON PIBSI or PIBA or PPA *? Water tolerance test - It is applied to define the capacity of the demulsifying agent to avoid the formation of permanent gasoline-water emulsions. The test is performed by vigorously stirring a sample of gasoline containing the additive motif of this invention in the presence of an aqueous buffer solution of an alkaline phosphate for two minutes after which it is allowed to stand for five minutes observing the volume change of the aqueous layer, interphase formation and degree of separation of the phases qualifying in conventional units that indicate the efficiency of the demulsifying agent (20 + 0, ib, (l)). * 2 Corrosion test - This test determines the protection against corrosion of the fuel when it is in the presence of metallic materials. The test is carried out by contacting the metered gasoline with the multifunctional additive in the presence of water with a carbon steel specimen for four hours while maintaining the temperature 38 ° C. At the end of the test period the specimen is graded in terms of the percentage of rust area it presents, considering that it passes the test when it presents up to 0.1% of the area with corrosion (B ++). * 3 Detergency tests on intake valves: a) Single-cylinder engine, 4 HP, speed. 2100 rpm, time = 16 hours. b) Ford 2.3-liter engine with dynamometer, time 140 hours.

EXAMPLES For the purpose of illustrating the experimental development of the composition of the multifunctional additive for gasoline, some examples of preparation and behavior evaluation are described below.

Example 1. 60% of the polyisobutylensuccinimide or polybutylamine or polypropyl amine dipersing agent, 20% of the polyether type fluidizing agent, 12.2% of the aromatic solvent are stirred and the temperature is raised to 45 ° C, after 45 minutes 5.2% are added. of corrosion inhibitor and 2.6% of demulsifying agent. Once the homogenization is achieved, it is cooled to 20 ° C and samples are taken for physical analysis and motor behavior.

In table 2, the characteristics of the additives formulated according to example no. 1, dosed with Pemex-Magna gasoline at 190 ppm.

T A B L A 2 Example 2 The example described in Example 1 was followed, but now the additives Multifunctional devices were prepared according to the following composition: 80% weight of detergent-dispersant polyisobutylene a succinimide or polybutylamine or polypropyl amine 20% weight of fluidizing agent In Table 3, the characteristics of the formulated additives are observed according to example 2, dosed with Pemex-Magna gasoline at 160 ppm.

TABLE Example 3 The procedure described in Example 1 was followed, but this time the Multifunctional additives were prepared according to the following composition: 70% detergent-dispersant agent 10% fluidizing agent 12.2% aromatic solvent 5.2% corrosion inhibitor 2.6% demulsifier In Table 4, the characteristics of the formulated additives are shown according to example 3, dosed with Pemex-Magna 190 ppm gasoline.

T A B L A 4 Table 5 shows the characteristics of the gasoline used in the experimental development of multifunctional additives based on polyisobutylensuccinimide, polybutylamine and polypropylamine. Notwithstanding the Fuels used can be gasoline with octane numbers (RON) of 80 to 98 and octane numbers MON of 75 to 95, with or without lead, with and without oxygenated compounds. TABLE

Claims (1)

NOVELTY OF THE INVENTION. Having described the invention is considered as a novelty and therefore, the content of the following clauses is claimed as property:

1. A multi-purpose additive composition for gasolines with or without lead, with or without oxygenates, based on a detergent-dispersing agent of the polyisobutylene succinic acid type or polybutylamine or polypropyl amine in a proportion of 20 to 95% but preferably 40 to 80% by weight; a synthetic fluidizer or polyether type carrier in a proportion of 0 to 50% but preferably 5-40% by weight whose chemical nature is of the polyether type of ethylene oxide, propylene oxide or butylene oxide, whether homopolymers or copolymers; an aromatic solvent in the proportion of 0 to 60% but preferably 10 to 50% by weight and can be benzene, toluene and xylene or their mixtures; a corrosion inhibitor in the proportion of 0 to 10% by weight, but preferably 1 to 8% by weight, belonging to the chemical family of the amino salts of carboxylic acids and a demulsifying agent of the phenolic resin type, oxyalkylated alone or with mixtures of polyglycols acylated and sulphonated in the proportion of 0 to 5% by weight but preferably 0 to 3% by weight. A multi-purpose additive composition for gasolines with or without lead, with or without oxygenated compounds as described in claim 1 whose level of incorporation in gasoline to give good performance results is between 50 to 500 ppm. but preferably from 100 to 300 ppm. A process for the preparation of multifunctional additive compositions for gasolines based on polyisobutylene succinate or polybutylamine or polypropyl amine, characterized by including a synthetic organic fluidizer type polyether, solvent type aromatic, corrosion inhibitor based on salts of carboxylic acids and demulsifier derived from resins phenolic and polyglyclic, as indicated in the detailed description of the present invention.