US1705020A - Coke treatment and product - Google Patents

Description

Patented Mar. 12,- 1929.

UNITED STATES PATENT orrlca.

ALLISON A. KOHR OI MAPLEWOOD, NEW JERSEY, ASSIGNOR TO THE KOPIEBS COR-.- PANY, F PITTSBURGH, PENNSYLVANIA, A CORPORATION OF IBENNSYLVANLA.

COKE TREATMENT AN D PRODUCT.

l i No Drawing.

This invention relates ingeneral to treatment of cellular carbonaceous residues, such ascoke, and is of especial utility'in designating the origin of such material so that the domestic purchasers, even though not able to determine the difference in quality of the coke from the cellular formation and arrangement, may quickly and readily determine whether or not other kinds 'of' coke are mixed therewith. More particularl this inopen, as for instance in the open basket type of house heating grade. This type of fixture is often installed for heating rooms in dwelling houses and the like and while coke is recognized as the cleanest and best fuel, an objection which is fre uently raised t'o-the use of coke as a fuel in suc domestic opengrates. is that it produces a less pleasant flame from an aesthetic point of view than wood. The present invention provides means whereby such objections may be overcome.

The invention further consists in such other new and seful improvements, and has for further objects such other operative advantages or results, as may be found to obtain in the processes and articles hereinafter described or claimed.

' The substances that may be used to produce flame coloration may be those commonly used in the pyrotechnic industry, and well known in that art. In pyrotechnic practice, such substances are generall mixed with potas sium chlorate or perc lorate before being added to the, combustible-material but this has been found not to be absolutely necessary in applying such substances to coke. A summa of the more common chemicals in the follows, but it is understood that the invention is not limited or confined in scope to the employment of any of these substances or any combination or combinations thereof. The

invention mav be practiced successfullv with Application filed September 25, 1925; Serial No. 58,493.

the useof any other substances which are found to give the color or combination of colors, desired upon combustion of coke that has been suitably treated. 4

Red colors are commonly obtained by the use of the salts, such as the carbonate, nitrate and sulphate, of strontium and lithium. Blue flames result from the use of the carbonate, sulphide, and arsenite of copper ((11100 Cub,qand CuHAsOy, respectively), andalso coloration, and the oxalate and carbonate of sodium are used when a yellow flame is desired. Such salts are comonly used with po- (KClO or perchlorate tassium chlorate (KGIOQ, and finely divided magnesium is sometimes added to produce a'more brilliant efi'ect. Various colors may also be'obtained, without the use of potassium chlorate, .b the e5 'calomel (HgCl). The nitrate, chlorate and carbonate of barium are used to effect a green use of the following materials, or com ina-.'

tions thereof: black oxide of antimony, sulphate of copper, and borax, andnumerous other. substances some of which are not deemed suitable for use for the purpose described, by reason of the offensive or poisonous character of the products of volatilization.

.Prefer ably, the substances to be used are 7 dissolved or suspended in'water, and sprayed upon the coke to be marked, thelatter being preferably somewhat above ordinary temperatures. For instance, the substances may be introduced into the quen'chin' water at the place of manufacture of the co e. i As an alternate method, thecoke may be dipped into solutions or suspensions of the chemical or chemicals used. The preferred manner is to add the material at the final sorting at the coke-screening station of the coke plant.

The term coke, as hereinabove used is meant to' designate the cellular carbonaceous residue that is obtained from the distillation in the absence of air of bituminous materials such as coal, coal tar, itch, shale oil, petroleum, and the like, an is independent of the source or. method of carbonization employed, such as ovens of the beehive or by-product type, retorts, and so on. (p

The broad idea of renderi'n coke distinc tive is described and claimed in the co nding application of F. W. Sperr, Jr., rial No. 58,492 filed of even date'herewith forv coke treatment and product.

The invention as hereinabove set forth 55a with quenching water containing and depositing upon the coke a flame-coloring substance or substances that will impart a characteristic color to the flame of combustion ofthe coke so quenched.

In testimony whereof I have hereunto set my hand.

' ALLISON A, KOHB.