US656253A

US656253A - Method of making sodium-carbonate crystals.

Info

Publication number: US656253A
Application number: US1395500A
Authority: US
Inventors: Josef Kuenstner
Original assignee: Individual
Current assignee: Individual
Priority date: 1900-04-23
Filing date: 1900-04-23
Publication date: 1900-08-21
Anticipated expiration: 1917-08-21

Description

Patented Aug. 2|, |900. J. KUNSTNER.

(Application Iled Apr. 23, 1900.)

/VVE/VTRI TTVEYS.

METHOD 0F MAKING SODIUM CARBONATE CRYSTALS.

(No Model.)

W/TNESSES- UNITED STATES ATE-NT- Friese.;

Josnrnnsrnnn, or onERsEpL'iTVLAUssEce, AUSTRIA-HUNGARY METHOD oFMAKlNG s oDl'uM-CARBONATE CRYSTALS.

SPECIFICATIO forming part of Lettr'stentNo. 656,253, dated August 21,1900.

i Application filed April Q3, 1900. 'Serial No. 13,955. (No specimens.)

To aZZ whom) it may concern? Be it known that I, JOSEF'KNSTNER, man-u-v facturer, a subject of the Emperor of Austria- Hungary, residing at Obersedlitz-Aussegg,`in the Empire of Austria-Hungary, have invented certain new and useful Improvements in the Manufacture of Carbonate-of-Soda Crystals; and I do hereby declare the following to. be a full, clear, 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.

This invention relates to an improved process for the manufacture of caibonate-of-soda crystals, in particular of small crystals.

The process consists'n eifecting the solution in water ofthe carbonate of soda from which the crystals are to be produced, such solution being then concentrated by evaporation until a saturated carbonate-oI-soua solution 1s obtained. The temperature of this solution must be such that it-will not then crystallize. This temperature may advantageously be 85 centigrade. The solution is then converted into spray, whereupon the sprayed liquid is cooled, whereby the crystallization thereof is effected. If thought desirable, theglwarm saturated carbonate-of-soda solution can also this is not essentially necessary. A

The .cooling of the sprayed carbonate-fsoda solution can be effected by causing a jet of compressed air to impinge upon a jet of the solution issuing in the same direction. The cooling of the liquid particles can,lhow ever, also be eiected by bringing intocontact with the :sprayed solution a current of cold air passing in the contrary direction'as the finely-divided solution'falls to the ground. Or both the said methods may be employed in combination -in such manner that a jet of 'be somewhat cooled before it is sprayed ,gbut

compressed airis first brought in contact with the jet of solution, so as to effect the spraying and cooling thereof, after which the falling spray is brought in contact with another forced current of air passing in the contrary direction. i

I will describe the process with reference to the accompanying drawing, which shows ay vertical section of a con-struction of apparatus that may be employed for the purpose.

The concentrated ca'rbonate-of-soda soini tion is led through a pipe b intoa recipient r,-

Which may advantageously be connected with thecompressed-air supply by the pipe n, so as to act as an air vessel. From the recipient ,fr the solution presses through the pipe 'm into the cooling apparatus c', in which the cooling-water enters at bottom through a pipe e and issues at top through a pipe f. The soluton,.on the other hand, 'enters the cooler at top through o and issues at 'bottom through g. In a second cooler c2 the air entering through the pipe a at o. is cooled by a current of cool-` ing liquid entering at e at bottom andl leaving the cooler at f. -The4 carbouate-of-soda solution passes through pipe g from the cooler c to the"ejector d, provided with a spraying-nozzle, which propelsthe solution in the form of spray into a closed tower loathe nozzle being at the saine' time suppl-led with compressed cooled-alifrom the cooler el through the pipevh. Thel tower into which the mixture of carbonate-of-"soda solution and lair is thrown is with advantage made at least about twelve meters high,with a base of about thirty square meters area. A strong current of cold'air is preferably injected at bottom by a fan Z, so that in rising upward it meets the falling spray and thenescapes through the openings at t'. As the liquid particles fall, they crystallize in consequence of the strong 4cooling action to which they are subjected by their contact with the cold upward current of air, and the resulting fine carbonateof-soda crystals are deposited on the iloor of the tower.

If the tower be made of sufficient height, it is'possible to dispense with compressed air for spraying the solution, the cooling of the .spray being effected during its downward fall by the upward current of cold air from Z.

The above-described process has the advantageover the crystallizing processes now in use in that the crystallizing-works for producing the same output will occupy much less space.

The working can lbe arranged to be carried on in acontinuous manner. The large crystallizing-tanks,heretofore employed can be dis ensed with.

here are no mother-liquors, as the whole ofthe carbonate' of soda employed is made to crystallize. y Also by operating in the above- IOO described manner small carbonate-of-soda crystals are obtained without the admixture ci? foreign substances orwithont the large ,ex-v

penditure of power hitherto necessary. y Having now particularly described and ascertained the nature of myinvention and the manner in which the same is to be performed, I declare that what I claim is 1. Process for the production of carbonateof-soda crystals, consisting in converting a warm saturated solution of carbonate of soda intorsmall particles by spraying and cooling such sprayed small particles, substantiallyas described.

2. Process for the production of carbonateof-soda crystals consisting in converting a Warm saturated solution of carbonate of soda into small particles by the spraying action of a jet of compressed air propelled in the same direction as lthe jet of liquid whereby the liquid particles are at the same time cooled, substantially as described'.

vby spraying, and thensnbjecting the falling particlesto an upward-directed current of 'cold air, substantially as described.

4. Process for the production o f carbonateof-soda crystals consisting in converting a 'warm saturated solution of carbonate o f soda into small particles by spraying'by means of a jet of compressed air issuing in the same dircction as the jet of 1iquid, and then subjecting the falling liquid particles to u. second npward current of cold air, substantially as described. i l

In witness whereof Ihave hereunto set my hand in presence of vtwo witnesses. i

JOSEF KNSTNER.

Witnesses:

FR. BRUZA, ADOLPH FISCHER.