FI67227B - BRAENNOLJA I VILKEN AER TILLSATT ETT JAERNHALTIGT TILLSATSAEMNE SAMT FOERFARANDE FOER DESS FRAMSTAELLNING - Google Patents

Description

'67227 FUEL OIL, CONTAINED WITH AN IRON-ADDED ADDITIVE, AND

METHOD FOR ITS MANUFACTURE-BRAND BRUSH, I VILKEN ÄR TILLSATT ETT JÄRNHALTIGT TILLSATSÄMNE S A M T

The present invention relates to a fuel oil to which an iron-containing additive has been added to enhance combustion.

The combustion-enhancing effect of ferrous additives in fuel oil is well known. The effect is catalytic and makes the oil burn more completely. The additives thus reduce the formation of soot and keep the furnace wall cleaner. In addition, the additives reduce the amount of air required for combustion and provide better efficiency.

As the iron-containing additive for fuel oil, dicyclopentadienyl iron, i.e. ferrocene, which is soluble in oil, has been used. In addition, some other organic oil-soluble iron compounds, such as iron carbonyl, have been found to be useful. However, the disadvantage of these compounds, including ferrocene, is their high cost.

The object of the present invention is to eliminate said drawback by forming a fuel oil containing an iron-containing additive, in which the additive is substantially cheaper than known additives and does not constitute a significant cost factor. The invention is characterized in that the additive is formed by an iron salt of one or more fatty and / or rosin acids.

The advantage of the invention is based on the fact that fatty and resin acids are a significant component in tall oil, which is mainly produced as a by-product of the 11-sucrose industry. Said acids are precipitated from tall oil by sodium hydroxide di 11a to give pine soap, from which the iron salts of the acids can be further prepared by means of ferrous sulphate. Ferrous sulphate is also a large-scale, very cheap material.

The fatty and resin acids contained in tall oil include e.g. oleic acid, linoleic acid, palmitic acid and abietic acid, and the additive according to the invention may thus be formed from iron salts of these acids. All of these salts are readily soluble in the oil, so adding them to the oil does not present any difficulty.

2 67227

The invention also relates to a process for the preparation of said fuel oil containing an iron-containing additive, and is characterized in that the preparation takes place by adding to the oil one or more iron salts of fatty and / or rosin acids.

The invention is described in more detail below by describing the preparation of the additive and the fuel oil containing it.

However, this description is intended only as an example and is not intended to limit the invention in any way.

The starting material for the preparation of the fuel oil additive is pine soap made from tall oil, which contains sodium salts of fatty and resin acids such as oleic, linoleic, palmitic and abietic acids. An aqueous solution is formed from pine soap to which ferrous sulfate is added. In this case, the anions of the acids in solution precipitate as iron salts, which are sparingly soluble than the sodium salts of the acids. The iron salts obtained are recovered in the normal manner.

The iron salts, which form the ferrous additive in the fuel oil, are added to the fuel oil by first dissolving them in a very small amount of hydrocarbon solvent. This solvent can be, for example, the same fuel oil to which the iron salts will be added. The amount of solvent may be such that the iron content of the solution is 1-5%, preferably about 2%. This solution is then added to the fuel oil so that the oil has the desired iron content, which is most preferably in the range of 10-200 ppm, especially in the range of 50-100 ppm.

The fuel oil in which said iron salts are used as an additive may be any oil containing mainly hydrocarbons. Such oils are, for example, the various oil fractions obtained in the fractionation of petroleum.

It will be clear to a person skilled in the art that the various embodiments of the invention are not limited to the above but may vary within the scope of the appended claims. Thus, it is not necessary that the iron salts forming the additive be based on the fatty and rosin acids of tall oil, but the iron salts of other similar acids, such as linoleic and stearic acids, may also be considered.

Claims (8)

1. Fuel oil, to which has been added an ferrous additive for more efficient combustion, can be added that the additive consists of the iron salt of one or more fatty and / or resin acids. 2. Fuel oil according to claim 1, characterized in that the additive is formed by iron salts of fatty and resin acids contained in talloija, such as oleic, linoleic, palmitic and abietic acids. 3. Fuel oil according to claim 1 or 2, characterized in that oil contains an additive so that the iron content of the oil is 10-200 ppm, most preferably about 50-100 ppm. A process for preparing a fuel oil according to any one of the preceding claims, wherein a process is added to the oil containing ferrous additive which enhances the combustion, characterized in that to the oil is added iron salt by one or more fatty and / or resin acids. 5. A process according to claim 4, characterized in that to the oil are added iron salts of fatty and resin acids contained in talloija, such as oleic, linoleic, palmitic and abietic acids. 6. A process according to claim 4 or 5, characterized in that iron salts are added to the oil so that the iron content of the oil becomes 10-200 ppm, most preferably about 50-100 ppm. Process according to any one of claims 4-6, characterized. hence, the addition of iron salts is carried out so that the salts are first dissolved in a small amount of hydrocarbon solvent, in which the iron content becomes 1-5%, most preferably about 2%, after which this solution is added to the oil