JPH0715107B2 - Additive for heavy oil / water mixed fuel oil - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to an additive for a heavy oil / water mixed fuel oil used for an emulsion fuel such as a prime mover, and mainly for an emulsion fuel for a boiler or diesel engine. It is effective as an additive.

[Conventional technology]

As fossil fuel resources not included in crude oil, coal and LNG,
Heavy oil such as oil sand natural asphalt is attracting attention due to its reserves. These heavy oils usually contain about 600 to 450 ° C or higher heavy distillate, which is the vacuum distillation residue.
It is a heavy oily substance containing 60% to 70% or more and has a high viscosity of tens of thousands centiboise or more as it is, and it is difficult to use as a fuel in handling, atomization by spraying, etc. For this reason, if these heavy oils are mixed with water to form an oil-in-water type (hereinafter referred to as O / W), it is possible to achieve a low viscosity close to that of water as a carrier water, but for that reason, the heavy oil content is lowered. It is not suitable as fuel. Therefore, a dispersant is indispensable for increasing the concentration of heavy oil and adjusting it to an O / W type fuel. A dispersant is added, but currently used are fatty acid ester type and higher alcohol type. It is a polyether compound, and its performance is insufficient. For this reason, when it is transported from abroad to Japan as an emulsion fuel, it is often in an unfavorable state as a fuel due to the coarsening of particles by the association of heavy oil particles.

[Problems to be Solved by the Invention]

The present invention solves the above-mentioned problems of the prior art and replaces heavy oil with
As an O / W type, it is an object to provide an additive suitable for preparing an emulsion fuel that can maintain stability for a long time at an oil concentration of 65% to 78%.

[Means for Solving the Problems]

To this end, the present invention provides a dispersing agent (a)
Salts of naphthalene, alkylnaphthalene or alkylbenzene sulfone compounds with or containing aliphatic aldehyde, (b) lignin sulfonate or its derivatives,
(C) Polystyrene sulfonic acid polymer or salt thereof,
At least 1 selected from the group consisting of (d) dicyclopentadiene sulfonic acid polymer or salt thereof, (e) sulfonated tar oil such as naphthalene oil or salt thereof, or aliphatic aldehyde addition polymer thereof. At least one component selected from the group consisting of a polyether compound containing two components and a stabilizer having one or more active hydrogen atoms per molecular weight and added with ethylene oxide or an alkylene oxide mixture containing ethylene oxide, or a derivative thereof. The present invention provides an additive for heavy oil / water mixed fuel oil, which comprises:

More specifically, a preferred embodiment will be described.
In the additive for heavy oil / water mixed fuel oil, characterized in that each of the stabilizers contains one or more components as essential components, the dispersant is an anionic system shown in (a) to (e) above. As a surfactant, a polymerizable aromatic hydrocarbon containing a sulfonic acid group or a polymerizable hydrocarbon monomer or a polymer or condensate thereof, the weight average molecular weight range is
Up to 20,000 is preferred.

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

The stabilizer is a nonionic surfactant, which is a polyether compound or a salt thereof obtained by adding ethylene oxide or an alkylene oxide mixture containing ethylene oxide to a compound having one or more active hydrogens in one molecular weight. Specific examples of the compound having: are the following (f) to (h).

(F) Phenol, cresol, tert-butylphenol, octylphenol, nonylphenol, dinonylphenol, dodecylphenol, xylenol,
Phenols such as naphthol, methylnaphthol, butylnaphthol, and paracumylphenol.

(G) Monohydric alcohols such as benzyl alcohol.

(H) Polyhydric alcohols such as catelcol, lezoncin, pyrogallol, pisphenol A, phenol formalin condensate.

As the alkylene oxide added to these compounds having active hydrogen, ethylene oxide is used alone or together with other alkylene oxides.

The proportion of ethylene oxide in the total alkyl oxide is 80
% To 100% (wt%) is suitable. Propylene oxide, butylene oxide, etc. are used as the argylene oxide other than ethylene oxide.

The polyether compound preferably has a weight average molecular weight of 400 to 4,000, and more preferably 500 to 3,000. In the additive of the present invention, the components (a) to (e) as the dispersant and the component of the stabilizer are preferably used in a weight ratio of 45/55 to 5/95, and the total amount of the additive is Is suitable for inclusion in the oil / water emulsion in the range of 0.2 to 2.5% by weight.

[Action]

Emulsion of heavy oil and water is
Generally, heavy oil is blended so as to be 65 to 78% by weight, a predetermined amount of the additive of the present invention is added, and the heavy oil is made into fine droplets by stirring. Can be adjusted. The stirring method may be a general paddle type or helical ribbon type stirring, but high speed stirring known as a line mixer is preferably performed. Moreover, good results can be obtained by using both of these stirring methods together. However, the former only serves for mixing.

〔Example〕

By using the additive of the present invention, it is possible to reduce the viscosity of heavy oil / water emulsion fuel and to keep the emulsion more stable than conventional ones even when stored for a long period of time. explain.

After mixing heavy oil and water with the prescribed additives to bring the total amount to 500 g, use a stirrer with a double helical ribbon blade to rotate
The mixture was mixed at 200 rpm for 5 minutes, uniformly mixed, and then mixed at 4000 rpm for 3 minutes with a high-speed shear mixer to prepare an emulsion.

The fluidity and static stability of this emulsion were evaluated by the following methods.

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

◯: Good Δ: Insufficient x: Poor (2) Static stability The above emulsion was put in a closed plastic bottle and stored for one month in a room sound, and then the fluidity evaluation of the above (1) was performed.

Examples of additives of the present invention are shown in Table 1.

Table 2 shows the measurement results of heavy oil emulsion properties using the additive of the present invention.

[Effect of the Invention] As is clear from the above description, the additive of the present invention satisfies the target performance, and by using the additive of the present invention, a high concentration heavy oil / water emulsion fuel can be obtained. For a long time (1
Even when stored for a period of time (months), the emulsion is less broken or agglomerated and the viscosity is dramatically lower (about 1/10 or less) compared to the conventional one, for example, one made with one surfactant.
Can be kept at

Continued Front Page Examiner Yoshihiko Funaoka

Claims (1)

[Claims] 1. As a dispersant, (a) an aliphatic aldehyde adduct of a sulfone compound of naphthalene, an alkylnaphthalene or an alkylbenzene or a salt thereof, (b) a ligninsulfonic acid salt or a derivative thereof, and (c) a polystyrenesulfonic acid polymer. Or a salt thereof, (di) dicyclopentadienesulfonic acid polymer or a salt thereof, (f) a sulfonated product of a tar oil such as naphthalene oil or a salt thereof, or an aliphatic aldehyde addition polymer thereof, Selected from polyether compounds or derivatives thereof containing at least one component and having ethylene oxide or an alkylene oxide mixture containing ethylene oxide added to a compound having one or more active hydrogens in one molecular weight as a stabilizer Heavy oil characterized by containing at least one component Mixing fuel oil additives.