US1272880A - Manufacture of bleaching-powder. - Google Patents

Manufacture of bleaching-powder. Download PDF

Info

Publication number
US1272880A
US1272880A US21552818A US21552818A US1272880A US 1272880 A US1272880 A US 1272880A US 21552818 A US21552818 A US 21552818A US 21552818 A US21552818 A US 21552818A US 1272880 A US1272880 A US 1272880A
Authority
US
United States
Prior art keywords
cylinder
powder
chlorin
bleaching
manufacture
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US21552818A
Inventor
Joseph William Moore
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
CASTNER-KELLNER ALKALI COMPANY Ltd
CASTNER KELLNER ALKALI Co Ltd
Original Assignee
CASTNER KELLNER ALKALI Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by CASTNER KELLNER ALKALI Co Ltd filed Critical CASTNER KELLNER ALKALI Co Ltd
Priority to US21552818A priority Critical patent/US1272880A/en
Application granted granted Critical
Publication of US1272880A publication Critical patent/US1272880A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • CCHEMISTRY; METALLURGY
    • C01INORGANIC CHEMISTRY
    • C01FCOMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
    • C01F5/00Compounds of magnesium
    • C01F5/26Magnesium halides
    • C01F5/30Chlorides

Definitions

  • ⁇ my inventionY bleaching powder may be made of high 'strength inV an inclined rotating cylinder which in respect of length may be compared with the tube mills used in cement works.
  • the best len h appears to be about 80 feet, which is dou le that suggested in Hendersons aforesaid specification.
  • the necessity for this great length is chiefly owing to theneed for thorough stirring of the partially chlorinated lime as it .descends the c linder and more particularly is it needed t at the stirring should be prolonged while the material is in the presence of the most concentrated chlorin, namely in the lower half of the length of the cylinder.
  • lVithout minimum length I may say that for satisfactory results a rotatingl tube not much shorter than 80 feet must be used.
  • a suitable inside diameter is 20 inches.
  • the cylinder a bolted together, as at made in cast iron sections b, is mounted in wellknown manner on roller bearings c at an ap- ⁇ basementte inclination, say 1 in 24. It is caused to rotate by worm gearing d at the rate of, say, thirty revolutions per hour.
  • the cylinder is lined -with glazed earthenware tiles w. It is connected at its ends by means of glands e with stationary boxes f, g respectively.
  • the box f has an opening h for exhaust of gases and an opening which limiting myself to1 an exact ter is rotated by gear m from the cylinder a and conveys the lime from hopper n to pipe z' down which it falls onto an inclined chute o and then into the cylinder a.
  • the lime in the helical conveyer Z forms a sufficiently gas-tight packing.
  • a suitable rate of feedl of the limey in an apparatus of the dimensions here given is about 8 tons per week in warm weather and 10 tons per week in cold weather.
  • the box g has an upper opening p for admission of gases and the lower opening ⁇ connected with a pipe g closed at its lowerV end by a slide v which is ⁇ opened intermittently to permit the finished bleaching powder to fall into the cask s. Inspection doors t are provided in the cylinder a.
  • the boxes f and g have laterallyv extending brackets u supported .by posts o carried by brackets w on the uprights which carry theend roller bearings c.
  • the exhaust opening L in the box f is connected with a suction pump so as to draw the gases away from the apparatus and maintain a slight suction therein, to assist thev upward travel of the chlorin and prevent escape of chlorin.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Inorganic Chemistry (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)

Description

l. W. MOORE.
MANUFACTUEE 0F BLEACHING POWDER.
APPLNIAIIH FILED FEB. 5. |918.
Patented .my 16,
F/...fanfwvvl lill/.IN1
JOSEPH WILLIAM'. MGORE, OF RUNCORN, ENGLAND, ASSIGNOE, T0 CTN'EEfKELLEEE,
ALKALI COMPANY, LIMITED, OF LOEDON, ENGTAND.
Mai'rurricrunn or spaarzame-servons.
Speciication of Letters Patent.
Application filed February 5, 1918. Serial No.. 215,528.
e To all whom it may concern:
- Be it known that I, JOSEPH WILLIAM MOORE, a subject of the King of Great Britain, residing in Ituncorn, England,have
invented certain new and useful Improvements in the Manufacture of Bleaching- Powder, of which the following is a speciication.`
In the .manufacture of bleaching powder, by causing lime and chlorin to pass through a rotating tube, or series'of connected rotating tubes, it is of very considerable commercial and technical importance to obtain the gas issuing 'from the tube, free or almost free, from unabsorbed chlorin, while the bleach is being continuously produced.
Over forty years 'ago (see Hendersons British specication'No. 3080 of 1871) it was proposed to charge linie with chlorin by passing chlorin up inclined tubes or -cylin-f ders .about 40 feet long, through which lime was made toY travel by imparting rotation to the tubes or cylinders, or to screws inside them. The latter principle is embodied in the now well known apparatus, patented by Hasenclever in 1888, British specification No. 17012, but the rotating tube method, has so far as we know, hitherto, never been successfully attempted on the commercial scale.
Lunge in Sulphurc Acid and Alkali, vol.
I111, page 468 (1896 edition) says:
All mechanical bleaching' powder chainbers (other than Hasenclevers) hitherto erected have been abandoned after a short period of work, either because the machinery failed, or because the bleach came out Weak or both.
Among the drawbacks to the before-inentioned proposals are that the shafts and cylinders rapidly corrode and the corrosion products mix with the powder decomposing same to some extent, impairing its keeping qualities and injuring its color, and where Scrapers or feeders are employed the powder is compressed against the cylinder wall forming an extremely hard and trouble-- to be vperiodically` some crust which has chipped oil' involving much disagreeable and expensive work. In addition to these drawbacks the gas issuing from such a rotating tube as described by Henderson contains a very considerable proportion of unabsorbed chlorin if a full output of strong bleach is maximum output of high strengthbeing produced and finally the working costs I -are necessarily high.
-According to `my inventionY bleaching powder may be made of high 'strength inV an inclined rotating cylinder which in respect of length may be compared with the tube mills used in cement works. The best len h appears to be about 80 feet, which is dou le that suggested in Hendersons aforesaid specification. The necessity for this great length is chiefly owing to theneed for thorough stirring of the partially chlorinated lime as it .descends the c linder and more particularly is it needed t at the stirring should be prolonged while the material is in the presence of the most concentrated chlorin, namely in the lower half of the length of the cylinder. Mere lengthening of the cylinder as coinparedwith Hendersons suggestion does not, however, insure a satisfactory product or fulfil the requirement that the chlorin must be substantially completely absorbed. It being necessary to work on the. counter-current principlev the chlorin must hel admitted at the bottom of theY cylinder and there is considerable difficulty in causing the chlorin to travel up the cylinder unless it is under such pressure that leakage from the cylinder cannot be avoided. `This diiiiculty is overcome in my invention by connecting an outlet at the top of the cylinder with a suction v power so as to maintain a slight suction in the cylinder.
lVithout minimum length I may say that for satisfactory results a rotatingl tube not much shorter than 80 feet must be used. A suitable inside diameter is 20 inches. Such a tube or cylinder is illustrated in the accompanying drawings, in which Figure 1 is a longitudinal sectie-n and Fig. 2 an end elevation.
The cylinder a, bolted together, as at made in cast iron sections b, is mounted in wellknown manner on roller bearings c at an ap-` propriate inclination, say 1 in 24. It is caused to rotate by worm gearing d at the rate of, say, thirty revolutions per hour. The cylinder is lined -with glazed earthenware tiles w. It is connected at its ends by means of glands e with stationary boxes f, g respectively. The box f has an opening h for exhaust of gases and an opening which limiting myself to1 an exact ter is rotated by gear m from the cylinder a and conveys the lime from hopper n to pipe z' down which it falls onto an inclined chute o and then into the cylinder a. The lime in the helical conveyer Z forms a sufficiently gas-tight packing.- A suitable rate of feedl of the limey in an apparatus of the dimensions here given is about 8 tons per week in warm weather and 10 tons per week in cold weather. The box g has an upper opening p for admission of gases and the lower opening `connected with a pipe g closed at its lowerV end by a slide v which is` opened intermittently to permit the finished bleaching powder to fall into the cask s. Inspection doors t are provided in the cylinder a. The boxes f and g have laterallyv extending brackets u supported .by posts o carried by brackets w on the uprights which carry theend roller bearings c.
The exhaust opening L in the box f is connected with a suction pump so as to draw the gases away from the apparatus and maintain a slight suction therein, to assist thev upward travel of the chlorin and prevent escape of chlorin.
Having thus described the nature of the said invention and the best means I know of carrying the same into practical effect, I claim A process for the manufacture of bleaching powder, which consists in causing lime to travel down an inclined rotating tube about 8O feetlong and causing chlorin to travel up the tube by applying a slight suction at the upper part of the tube. l
'In testimony whereof I have 'signed my name to this speciication in the/presence of two subscribing witnesses7 JOSEPH WILLIAM MOORE.
US21552818A 1918-02-05 1918-02-05 Manufacture of bleaching-powder. Expired - Lifetime US1272880A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US21552818A US1272880A (en) 1918-02-05 1918-02-05 Manufacture of bleaching-powder.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US21552818A US1272880A (en) 1918-02-05 1918-02-05 Manufacture of bleaching-powder.

Publications (1)

Publication Number Publication Date
US1272880A true US1272880A (en) 1918-07-16

Family

ID=3340499

Family Applications (1)

Application Number Title Priority Date Filing Date
US21552818A Expired - Lifetime US1272880A (en) 1918-02-05 1918-02-05 Manufacture of bleaching-powder.

Country Status (1)

Country Link
US (1) US1272880A (en)

Similar Documents

Publication Publication Date Title
CN106946483A (en) Industry by-product gypsum reduction apparatus
US1272880A (en) Manufacture of bleaching-powder.
US1690784A (en) Molding machine for butter, margarine, and the like
CN208004791U (en) A kind of powder metallurgy machinery powder feeder
US2185337A (en) Machine for slitting well casings and the like
CN105460437A (en) Material storage device for fertilizer production
CN207791218U (en) A kind of salt industry packing device
US542322A (en) Machine foe
US2193698A (en) Draft sintering apparatus
US2288085A (en) Roaster
US2626210A (en) Apparatus for discharging ash from gas producers
CN205288410U (en) Even castor plant base reation kettle for lubricant production reacts
US1959973A (en) Apparatus for the manufacture of superphosphate and like products
CN219340605U (en) Rapid analyzer for ash content of flotation tailings
US1062094A (en) Rotary grinding-machine.
US1200499A (en) Machine for making bleaching-powder.
US608446A (en) Sugar-crystallizer
US1358014A (en) Apparatus for manufacture of alkali-metal cyanid
US2838379A (en) Method and apparatus for nitrogenating calcium carbide
CN205441500U (en) A storage device for fertilizer production
US702573A (en) Apparatus for the manufacture of artificial stone.
US1381004A (en) Julien pieters
US568599A (en) Method of and apparatus for calcining cement
US868355A (en) Brick-machine.
CN108940062A (en) A kind of drug mixing plant