Benzyl hemiformal-containing biodiesel mixtures

Abstract

A mixture comprising a) biodiesel, and b) 10% to 60% by weight, in particular 15% to 40% by weight, of benzyl hemiformal.

Claims

1. A mixture comprising a) 40% to 90% by weight biodiesel, and b) 10% to 60% by weight of benzyl hemiformal.

2. The mixture according to claim 1, wherein the components a) and b) are present in an amount of 99-100% by weight based on the mixture.

3. The mixture according to claim 1, comprising, as biocide, benzyl hemiformal in an amount of more than 95% by weight based on the total amount of biocide in the mixture.

4. A process for producing the mixture according to claim 1, comprising dissolving the benzyl hemiformal in the biodiesel.

5. A process for the stabilization of diesel fuel against microorganisms comprising contacting the diesel fuel with the mixture according to claim 1.

6. The process according to claim 5, wherein the diesel fuel has a biodiesel content of up to 26% by weight.

7. The process according to claim 5, wherein the diesel fuel has a biodiesel content of with less than 2% by weight.

8. A diesel fuel comprising i) at least 200 ppm of benzyl hemiformal and ii) 0.18% to 26% by weight of biodiesel.

9. The diesel fuel according to claim 8, wherein the content of benzyl hemiformal is 0.02% to 0.2% by weight and the content of biodiesel is less than or equal to 1.8% by weight, based in each case on the diesel fuel.

Description

EXAMPLES

(1) 1) Benzyl Hemiformal—Solubility in Petrodiesel without Biodiesel Content

(2) While stirring, BHF was mixed with petrodiesel in 0.01% steps. The following solubilities of BHF in petrodiesel were determined:

(3) TABLE-US-00001 TABLE 1 Solubility of benzyl hemiformal in petrodiesel 100% [%] BHF 0.01 dissolved to give clear solution 0.02 dissolved to give clear solution 0.03 undissolved fractions 0.04 undissolved fractions

(4) As can be seen from the table, BHF in undiluted state can be incorporated into petrodiesel in an amount of up to approx. 200 ppm to give a clear solution. When adding larger amounts, droplets of undissolved benzyl hemiformal can be observed which had still not dissolved even after several hours. If greater amounts of BHF are intended to be rapidly incorporated into petrodiesel, as can be the case in the event of an acute attack from microorganisms, this type of incorporation is therefore unsuitable in practice.

(5) 2) Benzyl Hemiformal—Solubility in B7 Diesel Fuel (Petrodiesel with 7% by Volume of Biodiesel)

(6) TABLE-US-00002 TABLE 2 Solubility of benzyl hemiformal in B7 diesel fuel [%] BHF 0.01 dissolved to give clear solution 0.02 dissolved to give clear solution 0.03 undissolved fractions 0.04 undissolved fractions

(7) As can be seen from the table, BHF in undiluted state can be incorporated into B7 diesel fuel in an amount of up to approx. 200 ppm to give a clear solution. When adding larger amounts, droplets of undissolved benzyl hemiformal can be observed which had still not dissolved even after several hours. If greater amounts of BHF are intended to be incorporated into the diesel fuel, as can be the case in the event of an acute attack from microorganisms, this type of incorporation is therefore unsuitable in practice.

(8) 3) Benzyl Hemiformal Stock Solution in Biodiesel—Solubility in Petrodiesel

(9) A 20% BHF stock solution in biodiesel was mixed with petrodiesel (without biodiesel) in 0.05% steps while stirring. The following solubilities were determined:

(10) TABLE-US-00003 TABLE 3 Solubility of a BHF stock solution (20%) in petrodiesel without biodiesel content Addition of BHF BHF in stock solution [%] petrodiesel [%] 0.05 0.01 dissolved to give clear solution 0.10 0.02 dissolved to give clear solution 0.25 0.05 dissolved to give clear solution 0.5 0.1 dissolved to give clear solution 1.0 0.2 dissolved to give clear solution

(11) As can be seen from the table, the BHF stock solution can be incorporated into petrodiesel in a manner well-dissolved in a clear solution in such amounts that, as a result, significantly greater amounts of pure BHF are present in the petrodiesel than would be possible when incorporating pure BHF.

(12) In this way it is possible to incorporate such amounts of BHF into petrodiesel that fuels which have already been attacked can be efficiently treated thereby. Furthermore, larger amounts of BHF can be incorporated as a precaution into petrodiesels in which there is expectation of a relatively longer storage time of the fuel.

(13) A similar result could also be achieved by incorporation of the above stock solution into the B7 diesel fuel.