JPS6028876B2 - Mixture of stabilized petroleum and coal powder - Google Patents

Description

[Detailed Description of the Invention] The purpose of the present invention is to increase the ratio of coal powder mixed with petroleum to supply a mixture with high thermal efficiency as a fuel for thermal power generation, the steel industry, the cement industry, etc. It concerns a mixture of stabilized petroleum and coal powder.

Conventionally, thermal power generation has been performed by ejecting petroleum, especially heavy oil, and coal powder from different burners and co-firing them, but the ratio of heavy oil to coal powder is about 8:2.

Attempts have therefore been made to increase the mixing ratio to increase the thermal efficiency, but they have various drawbacks and have not been put to practical use.
The present inventors have arrived at the present invention as a result of diligent research efforts.

The present invention is based on the following general formula (where x, y, and z are each an integer of 1 or more) obtained by adding ethylene dioxide to monoamines such as ammonia, monoethanolamine, diethanolamine, and triethanolamine. 1 to 1.5 moles of a fatty acid having a carbon number of 12 to 18 are added to 1 mole of a compound represented by x + y + z = 3 to 30, and an esterification reaction is carried out. After obtaining the ester compound, a quaternary ammonium compound obtained by reacting with a cationizing agent such as methyl bromide, methyl chloride, dimethyl sulfate, jetyl sulfate, penzyl chloride, etc. is added to the total amount of petroleum and coal powder. This is a method for producing a stabilized mixture of petroleum and coal powder, characterized in that 0.05 to 1.0% by weight of coal powder is added.

In the above proviso, it is particularly preferable to add ethylene oxide so that the range of x+y+z is 5 to 20 in terms of effectiveness.

Further, examples of fatty acids having 12 to 18 carbon atoms include lauric acid, myristic acid, palmitic acid, stearic acid, and oleic acid, but lauric acid and oleic acid are particularly preferred in view of their effects.

The esterification reaction between the tri(polyoxyalkylene)amine and the higher fatty acid is preferably carried out by heating to 180 to 220 qo in the presence of an inert gas such as nitrogen gas to cause a dehydration reaction.

The molar ratio is 1 to 1.5 moles of higher fatty acid to 1 mole of tri(polyoxyalkylene)amine. In the present invention, petroleum refers to crude oil, heavy oil, light oil, kerosene, or a mixture thereof, which is used as a fuel, and economically preferred is crude oil or heavy oil. Further, it is more preferable that the coal powder is obtained by pulverizing coal and has a particle size smaller than 100 mesh. It is effective if the amount of the compound used in the present invention is 0.05% by weight or more based on the total amount of petroleum and coal powder; 1. If the weight percentage exceeds , the effect may be acceptable but it is economically unfavorable.

Differences in the method of adding the compound used in the present invention to a mixture of petroleum and coal powder or differences in the method of mixing petroleum and coal powder do not affect the intended effects of the present invention. For example, the compound used in the present invention is added to petroleum and then coal powder is mixed. The compound used in the present invention is added after mixing petroleum and coal powder. Differences depending on the method of adding the compound used in the present invention after crushing coal in petroleum, or the method of adding the compound used in the present invention after crushing coal in petroleum. In this case, the effect of the present invention remains unchanged. Next, the present invention will be explained by examples.

Example 1 Monoethanolamiso 305 (5 mol) was charged into an autoclave, and the reaction temperature was 150±loo○.
Ethylene oxide 11 at a reaction pressure of 2 to 4 kg/
00 (25 mol) was introduced to cause an addition reaction.

Next, the Hashiyoso layer, nitrogen gas introduction pipe, thermometer, dropping funnel,
The above ethylene oxide addition reaction product 281 (1 mol) and oleic acid 282 (1 mol) were charged into a flask equipped with a water sample tube and a condenser, and the temperature was raised to 200 CO (while introducing nitrogen gas). It took 6 hours and 17.5 hours to dehydrate to obtain an esterified product.

Next, while adjusting the temperature of the esterified product in the flask to 70°C, 126 mmol (1 mol) of dimethyl sulfuric acid was gradually added dropwise from the dropping funnel over a period of 1 hour, and then aged at the same temperature for 1 hour. A reddish-brown transparent brownish liquid (hereinafter referred to as compound A) was obtained, which was assumed to have the structure shown in FIG. Next, a middle eastern heavy oil having the physical properties shown in Table 3 is placed in the container.8
The temperature was 70.
The temperature was maintained at ±2°C, and 2 parts of Compound A were added thereto, and then 800 parts of pulverized Hongyi coal having the physical properties shown in Table 4 was gradually added and mixed well.

Next, the above mixture 1 is prepared as shown in the following figure, i.e., the upper part 30
1. Sampling ports are located at the 0' and 300' positions at the bottom of the cylinder.The cylinder is placed in a hot air circulation constant temperature machine at 70±1°C and left to stand for 30 days. 300 samples were collected from the upper layer, 400 samples from the middle layer, and 300 samples from the lower layer from the lower sampling port.

The viscosity at 70 oo of each of the upper layer mixture and lower layer mixture sampled as above was measured using a B-type rotational viscometer, and the results are shown in Table 1.

Example 2 1 mole of monoethanolamine to 10 ethylene oxide
An ester compound was obtained by reacting 1 mole of the product obtained by the addition reaction with 1.5 moles of lauric acid.

Next, pendyl chloride (1 mol) was added dropwise to 1 mol of this ester compound over a period of about 2 hours while adjusting the molecular weight to 60 to 7,000 to cause a reaction. B) was obtained.

(x+y+z=11) A mixture of.

A mixture was prepared in the same manner as in Example 1, and the viscosity was measured. The results are shown in Table 1.

Examples 3 to 7 Compounds estimated to have the following structures (hereinafter referred to as compounds C to G) were obtained in the same manner as in Example 1, and a mixture was prepared in the same manner as in Example 1 and the viscosity was measured. are shown in Table 1.

(Compound C) (Compound D) (Compound E) (Compound F) (Compound G) Comparative Examples 1 and 2 Synthesized in the same manner as in Examples except for the number of moles of alkylene oxide added, and the following structure was estimated. (hereinafter referred to as Comparative Compounds 1 and 2), a mixture was prepared in the same manner as in the Examples, and the viscosity was measured. The results are shown in Table 1.

(Comparative compound 1) (Comparative compound 2) Table 1 As shown in Table 1, each of the compounds used in the present invention, that is, the mixtures to which compounds A to G are added, has a viscosity difference between the upper layer and the lower layer. is small, so the mixture of heavy oil and coal has sufficient stability.

On the other hand, in each of the mixtures to which Comparative Compound 1 and Comparative Compound 2 were added, significant sedimentation of coal was observed and the lower layer lost fluidity, making it impossible to measure the viscosity.

Example 8 Collect 300 tons of Minas heavy oil having the physical properties shown in Table 3 into a container equipped with a canopy device, hold the contents on an oil tank, and maintain the temperature at 70 ± 2°C. 820 grams of crushed Daido coal having the physical properties shown in the table was gradually added and mixed well.

Next, the compound AO obtained in Example 1 was added to the total amount of the above mixture. A mixture containing 0.02% by weight was prepared, and the viscosity was measured in the same manner as in Example 1 and is shown in Table 2. Next, the viscosity was measured in the same manner as above except that the amounts of Compound A added were 0.05% by weight, 0.1% by weight, and 0.3% by weight, respectively, and are shown in Table 2.

Comparative Example 3 Comparative Compound 1 obtained in Comparative Example 1 was added to 0.0% of the total amount of the mixture of Minas heavy oil and Daido coal obtained in the same manner as in Example 8.
A mixture containing 5% by weight was prepared, and the viscosity was measured in the same manner as in Example 1 and is shown in Table 2.

Next, the amounts of Comparative Compound 1 added were 1.0% by weight and 2.0% by weight, respectively.
The viscosity was measured in the same manner as described above, except that 2% by weight was added, and the results are shown in Table 2.

Table 2 As shown in Table 2, the compounds used in the present invention, namely the compound AO. If 3% by weight or more is added, the difference in viscosity between the upper and lower parts of the mixture will be small, and therefore the mixture of heavy oil and coal will have sufficient stability.

On the other hand, even when the amount of Comparative Compound 1 was increased, significant sedimentation of coal was observed in each of the mixtures, and the lower layer lost fluidity, making it impossible to measure the viscosity.

Table 3 Table 4

Claims (1)

[Claims] 1. Represented by the general formula ▲There are mathematical formulas, chemical formulas, tables, etc.▼ (However, x, y, and z are each integers of 1 or more, and x+y+z=3 to 30) The compound obtained by reacting 1 to 1.5 mol of saturated or unsaturated higher fatty acids having 12 to 18 carbon atoms per 1 mol of the compound and then cationizing the compound is 0.05 mol based on the total amount of petroleum and coal powder. A method for producing a stabilized mixture of petroleum and coal powder, characterized by adding ~1.0% by weight.