JPH11172264A - Production of emulsion fuel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain an emulsion fuel having low viscosity and suited for long- term storage. SOLUTION: This fuel is prepared by mixing (A) 65-78 wt.% heavy oil with (B) water, and (C) 0.2-2.5 wt.% additive containing a dispersant component containing at least one member selected from the group consisting of an adduct of a sulfonate of naphthalene, an alkylnaphthalene, or an alkylbenzene with an aliphatic aldehyde or its salt; a lignosulfonate or its derivative; a dicyclopentadienesulfonic acid polymer or its salt; and a sulfonate of a tar oil such as naphthalene oil or its salt, or their aldehyde adducts and a stabilizer component containing at least one member selected among a polyether compound being an adduct of a compound having at least one active hydrogen atom in the molecule with ethylene oxide or an alkylene oxide mixture containing ethylene oxide or its derivative in a weight ratio of 45/55 to 5/95 and agitating the resulting mixture at a high speed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing an emulsion fuel for a motor or the like, and is effective mainly as a method for producing an emulsion fuel for a boiler or a diesel engine.

[0002]

BACKGROUND OF THE INVENTION As fossil fuel resources not included in crude oil, coal and LNG, heavy oils such as oil sands and natural asphalt have attracted attention from their reserves. These heavy oils are usually distilled residue under reduced pressure at 420 ° C.
Although it is a heavy oil containing about 60% to 70% or more of heavy fractions of ~ 450 ° C or more, these are highly viscous of tens of thousands of centipoise or more as they are. It is difficult to use in atomization by spraying. For this reason, if these heavy oils are mixed with water to form an oil-in-water type (hereinafter referred to as O / W type), the viscosity of the medium can be reduced to a level close to that of water. If it goes down, it is not preferable as fuel. Therefore, a dispersant is indispensable for preparing an O / W type fuel by increasing the concentration of heavy oil, and the dispersant is added, but fatty acid ester type and higher alcohol type are currently used. These are polyether compounds, and their performance is insufficient.
For this reason, when transported from overseas to Japan as an emulsion fuel, the fuel is often unfavorable due to coarsening by association of heavy oil particles.

[0003]

DISCLOSURE OF THE INVENTION The present invention solves the above-mentioned problems of the prior art, and uses heavy oil as an O / W type emulsion oil capable of maintaining long-term stability at an oil concentration of 65% to 78%. It is an object of the present invention to provide a production method suitable for the preparation of

[0004]

For this purpose, the invention of the present application comprises mixing the following three components (A) to (C), followed by high-speed stirring. %
And a method for producing an emulsion fuel containing 0.2 to 2.5% by weight of component (C).

(A) Heavy oil (B) Water (C) As a dispersant, (a) an aliphatic aldehyde adduct of a sulfone compound of naphthalene, alkylnaphthalene or alkylbenzene or a salt thereof, (b) lignin sulfonate or Derivatives thereof, (c) polystyrene sulfonic acid polymer or salt thereof, (d) dicyclopentadiene sulfonic acid polymer or salt thereof, (e) sulfonated product of tar oil such as naphthalene oil or salt thereof, or aliphatic thereof Aldehyde addition polymer, a polyether containing at least one component selected from the group consisting of and having, as a stabilizer, a compound having one or more active hydrogens in one molecular weight added with ethylene oxide or an alkylene oxide mixture containing ethylene oxide. At least one component selected from ether compounds or derivatives thereof Wherein, dispersant component and additive weight ratio of 45 / 55-5 / 95 of the stabilizer component.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION In more detail, preferred embodiments will be described. The additive (C) contains one or more components as essential components as a dispersant and a stabilizer, respectively.
The dispersant is a polymerizable aromatic hydrocarbon or a polymerizable hydrocarbon monomer containing a sulfonic acid group, or a polymer or condensate thereof, which is an anionic surfactant shown in (a) to (e) above, and has a weight average molecular weight. The range is preferably up to 20,000.

The salts (a) to (e) are alkali metal salts, alkaline earth metal salts, ammonium salts and organic amine salts.

[0008] The stabilizer is a nonionic surfactant,
A polyether compound or a salt thereof in which ethylene oxide or an alkylene oxide mixture containing ethylene oxide is added to a compound having one or more active hydrogens in the molecular weight, and specific examples of the compound having active hydrogen in the molecule are as follows. ) To (h).

(H) phenol, cresol, tertiary butyl phenol, octyl phenol, nonyl phenol, dinonyl phenol, dodecyl phenol,
Phenols such as xylenol, naphthol, methylnaphthol, butylnaphthol and paracumylphenol. (G) Monohydric alcohols such as benzyl alcohol. (H) Polyhydric alcohols such as catechol, resorcin, pyrogallol, bisphenol A, and phenol formalin condensate.

As the alkylene oxide to be added to these compounds having active hydrogen, ethylene oxide is used alone or together with another alkylene oxide. The proportion of ethylene oxide in the total alkylene oxide is suitably from 80% to 100% (% by weight). As alkylene oxides other than ethylene oxide, propylene oxide, butylene oxide and the like are used.

The polyether compound has a weight average molecular weight of
400-4,000 are suitable, preferably 500-3,000. The above (A) as a dispersant in the additive of the present invention
Or (e) and the stabilizer are 45/45 by weight.
Use at 55-5 / 95. It is appropriate that the total amount of the additives is added so as to be contained in the range of 0.2 to 2.5% by weight in the emulsion fuel to be produced.

The emulsion fuel of heavy oil and water is blended in a predetermined ratio of each, that is, 65 to 78% by weight of heavy oil, and the above additives are added in a predetermined amount and mixed. By performing the stirring, the heavy oil can be prepared in the form of fine droplets. The stirring is high-speed stirring by a device known as a line mixer or the like. The mixing can be performed by a very common paddle type or helical ribbon type stirring. Thus, good results can be obtained by using both of these agitation in combination and performing high-speed agitation after mixing.

[0013]

EXAMPLE According to the production method of the present invention, the viscosity of heavy oil / water emulsion fuel can be reduced, and the emulsion can be kept more stable than the conventional one even during long-term storage. An example will be described.

Heavy oil and water are mixed with a predetermined additive to make a total amount of 500 g, and then mixed with a double helical ribbon blade stirrer at a rotation speed of 200 rpm for 5 minutes, uniformly mixed, and then subjected to high-speed shearing. An emulsion was prepared by mixing at 4000 rpm for 3 minutes in a mixer. The fluidity and standing stability of this emulsion were evaluated by the following methods.

(1) Fluidity The viscosity of the prepared emulsion was measured with a Brookfield viscometer (No. 2 rotor, 12 rotations, measured after 1 minute), and a certain amount of the emulsion was passed through a 100 mesh sieve. The atomization rate was determined from the residual rate on the sieve of the emulsion obtained by measuring the amount on the sieve remaining after 10 minutes and evaluated as follows.

：: good △: insufficient ×: poor (2) Stability at rest The above emulsion was placed in a sealed plastic bottle, stored at room temperature for one month, and then evaluated for the fluidity of the above (1).

Table 1 shows examples of additives used in the production method of the present invention.
It was shown to. Table 2 shows the measurement results of properties of the heavy oil emulsion thus prepared.

[0018]

[Table 1]

[0019]

[Table 2]

[0020]

As is clear from the above description,
The emulsion fuel obtained by the production method of the present invention satisfies the intended performance, and even if the high-concentration heavy oil / water emulsion fuel thus obtained is stored for a long time (one month), Compared to those prepared with a single surfactant, for example, the emulsion is less likely to break or agglomerate, and the viscosity can be kept dramatically lower (about 1/10 or less).

──────────────────────────────────────────────────続 き Continuing on the front page (51) Int.Cl. ⁶ Identification code FI B01F 17/52 B01F 17/52 (72) Inventor Tatsuro Miyazaki 1-1, Akunouracho, Nagasaki-shi, Nagasaki Pref. Inside

Claims (1)

[Claims] 1. A mixture comprising the following three components (A) to (C), followed by high-speed stirring, containing 65 to 78% by weight of the component (A) and 0.2 to 2.5% by weight of the component (C). Manufacturing method of emulsion fuel. (A) heavy oil (B) water (C) as a dispersant, (a) an aliphatic aldehyde adduct of a sulfone compound of naphthalene, alkylnaphthalene or alkylbenzene or a salt thereof, (b) a lignin sulfonate or a derivative thereof, (C) polystyrene sulfonic acid polymer or salt thereof, (d) dicyclopentadiene sulfonic acid polymer or salt thereof, (e) sulfonated product of tar oil such as naphthalene oil or salt thereof, or aliphatic aldehyde addition polymerization thereof A polyether compound comprising at least one component selected from the group consisting of: a compound having at least one active hydrogen at one molecular weight and ethylene oxide or an alkylene oxide mixture containing ethylene oxide added as a stabilizer; or Contains at least one component selected from its derivatives, Additive weight ratio of component a stabilizer component is 45 / 55-5 / 95.