PATENTS OF INTEREST TO CHEMISTS. F~ITE 11s DA m m T H . \VEI.I.RS.
Ore Sffnvtrtoi*s, dr.-Janies
R . Montgomery has a new form of ore concentrator (jgg,oo3). Orriii R . Peck adds one more t o his list of pate n t s on a centrifugal ore separator (49j.6S1). a n d 11.\V. Iles covers his process of and a p p a r a t u s for t h e e s t r n c t i o n of matte f r o m slag by n u m b e r s 494,jjo a n d 494,j71. ;\. I,. Engel1)ach and S. E. Rretherton have a n a p p a r a t u s for reducing and s m e l t i n g s u l p h i d e ores (496,250). C h a r l e s 111. h l l e n t a k e s o u t t h r e e related p a t e n t s : 496,0.32 t r e a t s of h i s process of s m e l t i n g ores and refining metals, which is conducted in a converter (496,033), which has R p a t e x t t u - e r e (496,034). T h e ores a r e fed into t h i s converter ant1 t h e b l a s t is passed t h r o n g h t h e molten metal f o r n t i m e , t h e n c:ieckect hy plugging t h e triyeres t o p e r m i t slag, m a t t e , a n d metal t o separate in t h e converter a t tlifferent h e i g h t s , anti enough molten metal is retainetl each t i m e t o ignite t h e n e x t charge. T h o m a s -4. Edison h a s a roller for c r u s h i n g orcs ( ~ $ , ; 8 j ) . K. L. Raber (497,603) and A. R . Kittson (497,669) have each an amalgarnator, and Yriah Cuniniings p a t e n t s h i s ore c r u s h e r (495,424). C. n. IVa1kc.r h a s a new form of ore concentrator (497.833), ant1 Charles G . I3rou.n a patent ore t a n k for leaching (497,856). Orrin B. P e c k protects his centrifugal o r e separ a t o r by 497,204, while F. H.IVheelan (49S,597), IV. .'l RIiller (497,474), C h u l e s G. Ruchaiian (497,117), aiid Albert M. nair (496,391) have each a separator. \Villiani Stnhblebine's nietnllurgical furnace (49S,089) and M. Mannaberg's steel-sincltilig fnrnace (498,670) a r e recent issues, as well a s Joseph RIcClellantl's t a y e r e (435,565). A n a p p a r a t u s for removing iiiatte from slag is t h e joint iiiventi9ii of T h o m a s Drohan and T h o m a s Pearce (496,823). John IV. Marshall is t h e patentee of an ore-stamping inill (493,3S4) ant1 of ail ore s t a m p (493,385). Charles J. Fauvel h a s a new furiiace for t h e t r e a t m e n t of refractory ores (493,076). C. I V . Reehler is t h c inventor of a h y d r o t h e r m a l m i n i n g process (49j,jr;), which consists in filling a closed casing with a liquid body, inserting i n bore h o l e , ant1 h e a t i n g by electric resistance coil, so t h a t t h e expansive force of t h e liqiiitl m a y be e s e r t e d \vitliin t h e drill hole. Lend.--" Suhlinied lead pigments '' are ,prepared b y E. 0. n a r t l e t t hy d r i v i n g off lead fumes from lead-hearing material iii suitable furnaces, c a r r y i n g the fumes tliroufih flues a t a ret1 h e a t , ant1 s e p a r a t i n g t h e purified fumes by screening from t h e gaseous prodncts (496,038). Two more p a t e n t processes for t h e manufacture of white leatl. 496,10g, A. B. Rrowne, patentee, consists i n placing lead in a solution of a n i t r a t e of a n a l k a l i n e base ; t h e c u r r e n t is tlieii passed and t h e a l k a l i n e hytlrate forined a t one pole precipitates t h e lead \\hich h a s been tlissolved, and t h e r e s u l t a n t lead h y d r a t e is drietl ill an attnosphere of carbon dioside. 495,490 is t h e invention of .4ndrew Honniaii and Victor Vulliez. Lead s u l p h a t e is dissolved in a solution of caustic sotla or potash or ammoilium a c e t a t e , heated, and precipitated w i t h a n a l k a l i n e carbonate and dried.
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l’.L’!?KSTS O F I S T E K I S T T O CHEJIISTS.
Fcn’i/;zf~rs-1,u.lwig Kissinuller iiianufactures superphosphates from kettle residues of glue f‘ictories 1)y niixiiig residues with warin SUIpliuric acid ( 5 0 11. ! ail(: lieatiii:: t o 200 1:. ;ifter t h e tiitrogenous niatt r r i are iiissoivell 1)y tlic aci!i, t h e g y p i i i i i is precipitated and t h e fat rises to t h e surf:ict.. tlie scp:ir:itct! s,jl1ition is trcatwl with phosphate of liiiie to t a k e 111) all tlie siilpliuric :icirl 1,4y~.929,. 49~,9.+0 is a similar ‘es. ctc. Oninr T. Joslin treats t a n k process, applietl t o aniin:il c a r w i t e r \vitli suli)huric acitl, aiitls f i \ v t o thirteeii per cent. o f :i C ~ I I C ~ I I tratetl solutioii of \vaste iullcrs’ ezirtti tiissolveil i n siilphriric acic?, ari(1 ilries t h e protiurt :it j u o - 3 j o 1 2 . i ~ g j , :o a ~i i i l~495,043 i i also his patent f.)r inairufacturiiig icrtilizrr frS)iii taiik \v \tliat v i i t \\Iiirli p)’ropliospliates are foririetl 496.687; , Koiwrt Reiiiiaii elIcliiici’.lly ilissolvcs n a t u r a l bone or I I O I I ~ . i!1ca1 i i i t o i t s coiistituciit.,. prcciliitatiiig these elexriciits. filters ant1 \\;islies a l i i 1 aftc,:\\-an!s mise.; \ \ i t 1 1 ii1l)unicii. aluttiiiiiiiii sulphate. :liic1 ccilulosc in sol:itioii, tlrich partly, then subjects to a high teitiperature a?itl powerful 1)resbtire siiiitiltaiieouhl~,tliiis iiianufacturiiig artificial 11o11e I, -194,891 ‘. (;o/d nutf .Si/z,i-r.-IViii. i3irkiii subjects ores t o t h e action of potasi;i ii I i I cyan id e , 110t assi II 111 ferric y a I i i d e , a I 1
