Method of producing mercury
US RE17276 E
Description (OCR text may contain errors)
Reissued Apr. 23, 1929,
WALTER GLAESER, 0F
BROOKLYN, NEW YORK,
ASSIGNOR TO GLAESER, RESEARCH COBPORATIOZN, OF NEW YORK, N. Y., A COBPOBATION OF NEW YORK.
METHOD or rnonucme MERCURY.
No Drawing. Original No. 1,637,481, dated August 2,
Application for reissue filed August 31, 1928. Serial No. 303,372.
The.presentinvention relates, as indicated,
to a method of producing mercury, and is par directed to animproved and economical method of producing mercury from cinnabar ore and at the same time producing mercurous chloride, which is commonly known as calomel. of the foregoing and related ends, said inveution, then, consists of the means hereinafter fully described and particularly'pointed out in the claims.
- The following description sets forth in deticularly tail one approved method of carrying out the invention, such disclosed mode, however, constituting but one of the various ways in which the principle of the invention may be used.
In carrying out the present method I crush cinnabar ore to a fineness allowing it to pass a fine screen of 80 to 150 mesh and then add tothis finely crushed ore sufficient water to produce a thin paste, and to this paste 1 add a sufficient amount of acid to destroy the basicity of the mixture caused by the possible or calcium hypochlorite.
presence of any carbonates,' hydroxides and the like in the original rock. The amount of acid needed is generally relatively small. However, if the excess of acid employed in the mixture is to also react with the hypochlorite or the like referred to below, it should be sufiicient to allow liberation of chlorine or the likelfor the amount of mercury present in the ore. To this acidified paste is now added a hypochlorite of an alkali or alkaline earth metal, preferably a solution of sodium The reactions which take place are, first, interaction between the sodium hypochlorite and the acid which, for instance, will be considered as acid, to give sodium chloride and nascent chlorine. In practice I prefer to add a hypochlorite solution to a but slightly acidified paste of crushed cinnabar ore and water and to-liberate nascent ture by means of carbonicacid, which is supplied either as gas oras sodium bicarbonate. I then decompose the sodium or calcium carbonate'formed by adding an amount of acid equivalent to duced. The nascent chlorine acts with the cinnabar ore to form mercuric chloride while any excess chlor ne reacts with water to form hydrochloric acid and free oxygen, the free To the accomplishment chloride, from hydrochloric chlorine from this mix-' the amounts of carbonates pro-' ydride, acted upon which, with water, forms sulphuric acid. This sulphuric acid acts with the mercuric chloride to form mercuric sulphate and hydrochloric acid. During the reaction the mixture should be heated to a temperature of between and 90 hasten the speed of the reaction, and it should be agitated in order to secure a high yield of mercury and also to promote the speed. The
mercuric chloride and the mercuric sulphate are both in solution from which they are removed, after'or without previous filtration, upon the addition of finely divided metal, which may be either iron, zinc, copper, aluminum, metal alloys, or, in fact, practically any metal. The mercuric chloride and the mercuric sulphate are both in solution and re act .with the metal which is present to form an amalgam between this metal and the mercury,
and a chloride and a sulphate of the metal.
'After the formation of the amalgam between the mercury and the free metal present the amalgam is removed from the solution, Washed, and then heated in a cast iron still at a temperature suificient mercury, say above 360 ing collected in this way, purified from the over again in the process.
Instead of acting upon the mercuric chloride and mercuric sulphate, which are both in solution, with metal to obtain the mercury in form of an amalgam, I may'desire to produce calomel, which is mercurous the mercuric chloride and the mercuric sulphate solution. For this purpose I subject the mixture containing the-merwhile the metal is curic chloride and the mercuric sulphate in solution tofiltration, in order to separate the insoluble residue consisting of rock from this solution. To this solution I now add a solution of mercurous nitrate in sufficient amount a formation of mercurous chlor de to produce according to the following equation:
degrees C. in order to mercury and may be used 1927. Serial No. 750,000, filed November 14, 1924.-
to drive off the v I C., the mercury be-,.
' The mercurous chloride which is thus formed is insoluble. in the solutionand is sep'arated from the solution by filtration, then dried and purified by resublimation;
The mercuric sulphate contained in the mother liquor from the mercurous chloride is by metal fillings to obtain its mercury content in the form of a metal amalgam as described above.
The reactions which take place in the mixture during the hypochlorite treatment and the treatment with metal I believe to be as follows:
The present process is simple and inexpensive and may be used to produce either calomel and some metallic mercury, or metallic mercury alone .at aconsidcrable saving over the methods which are now in use. I have found that nascent bromide or iodinewill act equally as well as chlorine in promoting the reactions described above for the formation of either the mercury amalgam or the calomel.
Other modes of applying the principle of my invention may be employed instead of the one explained, change being made as regards the method herein disclosed, provided the step or steps stated by any of the following claims or the equivalent of such stated step or steps be employed. 7
I therefore particularly point out and distinctly claim as my invention 1. In amethod of extracting mercury from finely divided cinnabar ore, the step which finely divided cinnabar ore, the
h finely divided consists in reacting upon such ore with a hypochlorite of an alkaline or alkaline earth metal and a metal, thereby liberating mercury and forming an amalgam with the fnetal present.
2. In a method of extracting mercury from steps which consist in reacting upon cinnabar ore with a metal and a hypochlorite of an alkaline or alkaline earth metal and then removing'the resulting amalgam of the metal and the mercury and heating the same to free the mercury therefrom.
3. In a method of extracting mercury from cinnabar ore, the steps which consist in reacting upon cinnabar ore With a metal and a hypochlorite of an alkaline metal, then removing the resulting amalgam of the metal and the mercury, and heating-the same to free the mercury therefrom.
4. In a method of extracting mercury from cinnabar ore, the step which consists in rendering the mercury content of cinnabar ore Water soluble by means of a nascent halogen.
5. In a method of extracting mercury from cinnabar ore, the step which consists in rendering the mercury content of cinnabar ore Water soluble by means of a nascent chlorine,
6/ In a method of extracting mercury from -cinnabar ore, the step which consists in making mercuric chloride by reacting upon cinnabar ore with nascent chlorine.
7 In a method of extracting mercury from cinnabar ore, the step which consists in making a mercuric halogen compound by reacting upon cinnabar ore with nascent halogen.
8. In. a method of extracting mercury of cinnabar ore, the step which consists in reacting upon such'ore with a hypochlorite of an alkali or alkaline earth metal and a metal.
Signed by me, this 22nd day of August,