Document 5L8dNnGzeJZmL0QOdMDgRykYV

BEATS Eve^thin* draljlf Tnte clstacns In thn THE DUTCH baatmeat and as tha tame water la used over aed over again, tha slight metallic residue that may go to the bottom is nio om %r wh%f im vuiic through the process sgaln and fully Bav*tttiMiM4 fcy 9*tr*lt utilized. \ c*-- "All of thb being under water," said Dr C. D.I Holley, the chemist of the es- T Detroit Fret Press, May 16,190*. So old that It is moas crown, b the tabishment during a trip through the plant yesterday, ''there Is absolutely no danger ef lead poisoning. Each stage of saying. "It beau the Dutch," and yet the process bunder full control, the full the Acme White Lead St Color Works chemical increase is obtained and the pro ha* actually done this by the perfection of a process invented by W. K, Rowley cess produces a uniform article without impurities of any kind. This peocess re quires no acids, tan bark, or parts and by which white lead is made a finished takes but two or three days before it goes product In from seven to ei|ht days In' to the driers where It remains five days, eluding the dryinc as against no to tsj days by the old Dutch process in vogue as against fronrpo to im days by the off. Dutch process, exclusive of tha drying which ef course is five days. In the for hundreds of yean. Dutch process only double refined lead This meant tha eractiod of a 1100,000 can be used. In thb process any good reinforced concrete building as an addi tion to the plant of the Acme, a separata grade of lead fs used. After melting, the lead Is atomized Into an impalpable pow der, and this atomized lead, is, as you establishment devoted entirely to this sec, distributed by pumps and gravity." new Industry with especially deigned The building Is of reinforced concrete machinery and apparatus. The plant is and staal, three stories in heieht, light, finished and so is the experiment. At airy and sonitiry, and no min engaged a the manufacture has any hard labor the rate of 10.000 tons of the purest of or heavy lifting. Thus the Acme saves white lead a year Is now being turned Immense sums in equipments, in main out, and it Is not touched by a hand tram the time the pig of human teed is tenance. and in labor and gats up pounds of white lead for every too pounds of metallic lead put In the furnace. dropped into the furnace on the top door Tha cirboo dioxide ges M made from until the product has, in its various coke. The nest furnishes the steam far states of development, dropped to the the atomising and far the running of die basement and been pumped again to the engine. The gas passes through q tower of coke saturated with chemical prepara second floor, finished. tions so that all sulphur and Impurities In the old process In vogue until this are removed and tha gas passes to tha was completed, the metallic lead was cast carbonating cylinders absolutely pure. ito perforated discs. These discs were in all its appointments the plant is modern and yet simple and.easily man picked into earthem pots or retnns,fiod> aged. Mr. Rowley, the inventor. Or. ed with acetic acid. About eighteen, nHolley, the chemist, and the Acme of- pounds of lead was put Into each not. Uicials are naturally proud of the achieve. These pots were arranged in layers piled i ment and feel that in addition to opening hew Proems or reeking Wfclti Lena woelse greet ehapgr In petal la. daaary- Tka w Valuing at tha seat Whits Lead Calar Work* wklte lead la autti tka -Sew XIId preeean * hoerds between an unlimited field of enterprise, they have each layer, and each layer resting on sev-1 given Detroit something weyth haverai inches of ground tan bark, which ling. was also placed around the edges of the pots, which were allowed to remain bur- lad In tan baric far from go to tandays, while chemical action caused by the heat of the fermenting tan bark and the acid slowly converted the metallic lead Into the white lead used for paint The cor rosion was never complete and anywhere from 6j to *jpdr cent of the metallic leadi only was converted lata the finished pro duct. Being herd and brittle it was Sround and then Hosted and pumped to it drying pans of copper. It necessitat ed the employment of forty men for ev ery stack of pots. It Is bv force of contrast the full sig nificance of the new or "mild process" is brought home, and It is then realized that the Detroit punt will revolutionize the manufacture of white lead the world over. To Detroit, and to the Acme in terests Is due the credit of making one of the greatest scientific discoveries of the agepncricablt. In the new precast a* operated at the new Acme plant, nothing but steam, wa ter and cartel dioxide gas are used, re sulting in bringing to the drying pans, m finishn product, iz j pounds of white lead for every teo pounds of metallic lejd placed In the starting furnace. During every ten hours, the plant it in operation, 100/300 pounds of metallic lead is melted,: passlag from the bottom of the furnace Into a very hot, steam filled tank, where it becomes a soft blue substance, as thin as thin mud, and in this state verv sus ceptible te chemical change. From there! it goes to large metallic duplex cylinders; where it la kept continually agitated with water in the presence of air which is farced thrbugh the cylinders at law pres sure. The product b then an orange or ochre color. Thb part of the operation is complete In less than two days. The product Is then passed through a separat ing system which removes anv sl.ght me tallic residua and b then pumped into the caitenaring cylinders, somewhat similar to the cylinders already described. In the last cylinder the basic hvdomdes of lead, at they are called, in the pres ence of n considerable amount of water are subjected to a current ot carbon dioxide gas, which in lea* than two hours convert! the hydoxldes into white lead, which containing no Impurlrfes. re ready to pump Into tha drying pans without auy washing or separating whate-tt. the finished product of purest white lead was seen laying in the drylnft beds ut .j **s stretched upon cots of wire* w ,th sne.iow pans tenenth to catch the moisture Mat filters through. The fact of the wad be log free from impurities rende-s -nr ex pensive copper drying pans unne.rewc The finished product sever c 1- * wJ and that part destined (or . n-.nl use Is passed onto the g-nc -< mm where ft Is mixed with oil mu -- r*te form seen In the can when bo .cm *rom the hardware stares. in the new process no alkai , w un bark are required. Twelve m- -r-i lire entire plant for twenty-four -o-.r ,n> and everything is done by g-,. *v and htaery. In it* softconjidui- co S ls pumped everywhere. 1-1 `-.i c lamp amount of later Mr. Rowley not oply loven'm .-w cess, which ia covered bv bead :rnr>. but also the machioery r, 1 "> white lead ia made. No cdts ed. on lumberis necessary ihefe igoot a particle ui _ 0007-SWP-037424 N22919