US1079142A - Process for the production of weatherproof carbonaceous fuel of permanent shape and for rendering innocuous the sulfur contained in the coal. - Google Patents

Description

tartan err-true Prt'ititNJiJ @FFHEE EMIL roLLacsnK, or FLORENCE, ITALY;

PROCESS FOR THE PRODUCTION OF WEATHERPROOF Cli-RBONACEOUS FUEL OF PER- MANENT SHAPE AND FOR BENDERING INNOGUOUS THE SULFUR CONTAINED IN THE COAL.

N 0 Drawing.

To all whom '1' i may concern Be it known that I, EMU, Ponnaosnn, subject of the King of Hungary, residing at Florence, Italy, have invented certain new and useful improvements in processes for the production of weatherproof carbonaceous fuel of permanent shape and for rendering innocuous the sulfur contained in the coal; and I do hereby declare the following to be a full, cl air, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

As is well known the amount of combustible sulfur contained in coal brings about serious disadvantages in consequence of the sulfur dioxid which is formed when the coal is burned. To prevent the gases of combustion from becoming contaminated with the injurious sulfur dioxid it has already been proposed to mix powdered slaked or unslaked lime with the coal or to spray milk of lime upon the coal when the latter is burned. to achieve satisfactory results in this way, as when powdered lime was used it did not remain in contact with the coal up to the commencement of the evolution of the sulfur dioxid but fell down into the ash pit or was drawn into the chimney. Blowing powdered lime into the furnace by the aid of atomizing apparatus is also not practicable on account of the choking up of the nozzles which always takes place. If on the other hand milk of lime be injected into the flirnace the water introduced with the lime easily puts the fire out. Under all circumstances the addition of the lime increases the amount of ash contained in the fuel and thereby lessens its heating value.

The object of the process which forms the subject matter of this invention is to produce a weatherproof carbonaceous fuel which will retain its shape permanently and to render the sulfur therein contained innocuous by means of lime, care being taken however that the lime which serves to bind the sulfurous acid shall permanently remain in intimate contact with the coal and also that the heating effect of the carbonaceous fuel produced may show no diminution in comparison with that of the original coal.

Specification of Letters Patent.

Application filed May 4, 1912.

It has not however been possible Patented Nov. '1 8, it 913.

Serial No. 695,310.

According to this invention this object is attained by mixing the coal with a liquid which, in addition to slightly more lime than is necessary for the binding of the injurious sulfur in the coal, contains a binding agent such as starch, glue, waste liquor from sultite cellulose or the like, after which the mixture so obtained freed from excess of water by drying, molded after any desired method and finally impregnated with a composition prepared by boiling crude petroleum oil containing (mocerite or paratlin-like constituents with bitumen and phenols with a powerful, supply of air until a consistency is reached at which the mixture will solidify when cold.

For the practical carrying out of the process a given amount of lime, amounting to about 1 per cent. more than is required for rendering the sulfur innocuous, is mixed in the form of a thick milk or a thin paste with about 3 to -:l per cent. of a binding agent of the above mentioned kind and the coal, which is for the most part in the form of dust, intimately incorporated with the mixture. The mixture so obtained is allowed to dry in the air or at a higher temperature and can then be molded. Since however the addition of the lime increases the amount of ash contained in the material and decreases its heating effect, the alkaline nature and the porosity of the molded material are made use of to enable it to be enriched with fuels of high calorific value. For this purpose crude petroleum oil, which itself contains ozocerite or paratlin-lil e constituents in appreciable ({lHtlltitlUS or has been mixed with such until it contains about 10 per cent. thereof. is heated to boiling, and bitumen and phenols, which latter may with advantage be in the form of crude phenol or creosote oil, are then stirred into the boiling oil with a powerful supply of air until the com position has acquired a consistency which corresponds to a specific gravity of about 1.35 degrees Be. at 35 degrees C. and causes the composition to solidify at ordinary tem perature. Into this composition, so long as it remains at a ten'iperature lying between 90 and 100 degrees C. is dipped the molded carbonaceous material, and the hot lluid mass penetrates thoroughly into the pores thereof, becomes saponified therein with the previously added excess of lime, such saponification being accompanied with a vigorous reaction and when the molds thus impregnated are cold effects a coherent filling up of the pores thereof whereby the blocks are rendered Weatherproof and permanent in shape in a high degree. Since in addition to this the absorbed impregnating composition consists of substances of high calorific value, the reduction'of the heating effect of the coal caused by the addition of the lime is compensated again thereby, and in this way even an increase of the original heating or calorific value of the carbonaceous material employed can be obtained.

l/Vith regard to the practical carrying out of the above described process it should also be noted that it may also be carried out, without departing from the essential features of the invention, by mixing the mixture obtained in the manner described from coal, binding agent and excess of lime, without previously drying it, With the impregnating composition produced by heating crude petroleum oil containing paraflin or ozocerite-like substances with bitumen and phenols with a powerful supply of air, and then drying and molding the plastic mass so obtained in any desired manner. This method of working has the advantage that the product produced thereby is not rendered Waterproof to a greater or lesser depth only but rather throughout its entire mass.

I claim as my invention the improvements in 7 1. Process for the production of weather proof sulfur-neutralizing fuel, which oomprises mixing comminuted carbonaceous fuel with a liquid containing a binder and lime in excess of the sulfur content of the fuel, and impregnating the mixture so obtained With ozocerite containing substances boiled with bitumen and phenols treated with a large supply of air.

2. Process for the. production of weatherproof, sulfur-neutralizing fuel, which comprises mixing comminuted fuel with a liquid containing a binder and lime in excess of the sulfur content of the fuel, drying the mixture, and impregnating the dried mixture with an ozocerite containing'substance boiled with bitumen and phenols treated with a large supply of air.

3. Process such as described, which oomprises mixing comminuted fuel with sulfur cellulose waste liquor and lime, and then with ozocerite containing substances boiled with bitumen and phenols treated with a strong current of air.

In testimony that I claim the foregoing as my invention, I have signed my name in presence of two subscribing witnesses.

EMIL POLLACSEK l/Vitnesses ORoN PoY, CI-IARLEs L. BoLooNn.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C.