US3886249A - Production of granular sodium dichloroisocyanurate - Google Patents
Production of granular sodium dichloroisocyanurate Download PDFInfo
- Publication number
- US3886249A US3886249A US342511A US34251173A US3886249A US 3886249 A US3886249 A US 3886249A US 342511 A US342511 A US 342511A US 34251173 A US34251173 A US 34251173A US 3886249 A US3886249 A US 3886249A
- Authority
- US
- United States
- Prior art keywords
- sodium dichloroisocyanurate
- granules
- water
- powder
- rolls
- 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
Links
- CEJLBZWIKQJOAT-UHFFFAOYSA-N dichloroisocyanuric acid Chemical compound ClN1C(=O)NC(=O)N(Cl)C1=O CEJLBZWIKQJOAT-UHFFFAOYSA-N 0.000 title claims description 20
- 238000004519 manufacturing process Methods 0.000 title description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 18
- 239000008187 granular material Substances 0.000 claims abstract description 15
- 239000000463 material Substances 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 10
- 230000036571 hydration Effects 0.000 claims description 5
- 238000006703 hydration reaction Methods 0.000 claims description 5
- 239000000843 powder Substances 0.000 abstract description 7
- 239000000203 mixture Substances 0.000 abstract description 6
- MSFGZHUJTJBYFA-UHFFFAOYSA-M sodium dichloroisocyanurate Chemical compound [Na+].ClN1C(=O)[N-]C(=O)N(Cl)C1=O MSFGZHUJTJBYFA-UHFFFAOYSA-M 0.000 abstract description 4
- 238000012216 screening Methods 0.000 abstract description 2
- 238000007906 compression Methods 0.000 description 6
- 230000006835 compression Effects 0.000 description 6
- 239000002245 particle Substances 0.000 description 4
- 238000000354 decomposition reaction Methods 0.000 description 3
- 239000000460 chlorine Substances 0.000 description 2
- 238000005469 granulation Methods 0.000 description 2
- 230000003179 granulation Effects 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 238000005979 thermal decomposition reaction Methods 0.000 description 2
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- 239000007844 bleaching agent Substances 0.000 description 1
- 238000005660 chlorination reaction Methods 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 239000003599 detergent Substances 0.000 description 1
- 150000004683 dihydrates Chemical class 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 230000009182 swimming Effects 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C11D1/00—Detergent compositions based essentially on surface-active compounds; Use of these compounds as a detergent
Definitions
- the granular material may be UNITED STATES PATENTS dried, if desired, to anhydrous granules, or used in hyd t d f 2,755,509 7/1956 Smidth 264/140 Ta 6 orm 3,071,816 l/1963 Allen et al.
- Sodium dichloroisocyanurate is widely used as a source of available chlorine in solid bleach and detergent compositions. and in chlorination of water in swimming pools. It is desirably sold as granules to 70 mesh U.S. standard screen). Since it is generally recovered from manufacturing operations as a powder in the 200 to 400 mesh size range, it is necessary to pelletize the fine material. This may be done by highpressure tableting, followed by crushing, or by sheeting in a roll compactor into corrugated, readily frangible sheets, which are then broken down to granules in any convenient machine.
- a principal problem is that of excessive fines production. requiring recycle rates of 60 to 80%, where a +70 mesh granule is desired.
- a second prob lem is that temperature control is essential in the process, since anhydrous sodium dichloroisocyanurate is known to undergo heat-induced decomposition. In order to prevent such decomposition, which can result in actual fires, careful monitoring of the process is required. Additionally, it is essential to avoid contamination of the product with organics such as lubricating oil, since this can cause thermal decomposition of the product.
- the drawing shows schematically the apparatus used in the practice of this invention.
- the invention herein involves the sheeting of hydrated powdered sodium dichloroisocyanurate, and the breaking-up of the sheets into granules.
- the process involves apparatus hitherto used in the granulation of anhydrous sodium dichloroisocyanurate; the apparatus is shown in the drawing.
- the powdered salt is fed into a hopper 10, and by means of feed screws 12 and 14 into the bite between a fixed roll 16 and a compression roll 18, which is forced against the fixed roll 16 by a compression assembly 20.
- the sheet of salt 22 which results is fed into a granulator 24 which breaks up the sheet into granules and powder; the product is removed at 26, and is then screened.
- the roll 18 may be smooth or otherwise designed. as in the form of a sine wave, to produce the particle size desired for the granulated sodium dichloroisocyanurate product.
- a typical 4 inch sine wave which has about ten complete inch sine waves in it, about A inch deep. produces a corrugated sheet which breaks up into mainly -10 product.
- the roll 18 is forced against the roll 16 by about 7,500 i 50% pounds of force per linear inch of roll.
- the granulator 24 may be any device which will break up the continuous sheet which is fed from the roller. Since the sheet is readily friable, a simple hammer mill will work, or a mill with simple rotating shear blades (e.g. a Fitz mill).
- EXAMPLE 1 The same compactor rolls and granulator, at the same settings as in Example A were fed with the same raw material, first hydrated with 14.1% of water (the dihydrate); the material had the same particle size distribution as the original material. The product resulting had the following particle size distribution:
- Example 1 was repeated, except the feed contained 12.6% of water, and the rolls were set at a force of about 8,000 pounds per linear inch of roll. The results were as follows:
- the product can be used as it comes from the process, or it can be dehydrated to produce the anhydrous product.
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Glanulating (AREA)
- Detergent Compositions (AREA)
- Agricultural Chemicals And Associated Chemicals (AREA)
Abstract
Granular sodium dichloroisocyanurate is made by forming sheets of sodium dichloroisocyanurate containing from 11.0 to 14% of combined water, by feeding sodium dichloroisocyanurate powder between sets of rolls at pressures of the order of 7,500 + OR 50% pounds of force per linear inch of contact line, breaking up the sheets to produce a mixture of powder and granules, and then screening the broken-up mixture to get the desired granules. The granular material may be dried, if desired, to anhydrous granules, or used in hydrated form.
Description
United States Patent 1191 1111 3,886,249
Manganaro 1 May 27, 1975 [54] PRODUCTION OF GRANULAR SODIUM 3,548,046 12/1970 Savage 264/140 DICHLOROISOCYANURATE h Primary ExaminerRobert F. W ite [75] Inventor. .Larses L. Manganaro, New York, Assistant Examiner T E. Balhnff [73] Assignee: FMC Corporation, New York, NY. [57] ABSTRACT 22 il Man 19 1973 Granular sodium dichloroisocyanurate is made by forming sheets of sodium dichloroisocyanurate con- [21] Appl' 342,511 taining from 11.0 to 14% of combined water, by feeding sodium dichloroisocyanurate powder between sets 52 U.S. c1. 264/118; 264/140; 264/145 of rolls at pressures of the Order of 7,500 i 50% [51] Int. Cl. B28b 11/14 Pounds of force P linear inch of Contact line, break- [58] Field of Search 264/118, 140, 144, 145 ing up the Sheets to produce a mixture of Powder and granules, and then screening the broken-up mixture to 56 References Cited get the desired granules. The granular material may be UNITED STATES PATENTS dried, if desired, to anhydrous granules, or used in hyd t d f 2,755,509 7/1956 Smidth 264/140 Ta 6 orm 3,071,816 l/1963 Allen et al. 264/144 l Clalm, 1 Drawing Figure 0 FEED VERT'CAL 4 HORIZONTAL FIEED SCREW FEED SCREW 12 F|XED COMPRESSION ROLL ROLL 20 O O HYDRAULIC COMPRESSION ASSEMBLY GRANULATOR 24 lCOMPACTED AND GRANULATED PRODUCT TO SCREENS PATENTEDHAYZY ms 3. .886249 o FEED VERT'CAL /HORIZONTAL FEED SCREW FEEDSCREW l2 .FIXED COMPRESSION ROLL ROLL 120 O O I KHYDRAULIC COMPRESSION ASSEMBLY GRANULATOR 24 lCOMPACTED AND GRANULATED PRODUCT TO SCREENS PRODUCTION OF GRANULAR SODIUM DICHLOROISOCYANURATE This invention relates to the production of granular sodium dichloroisocyanurate from the powdery solids obtained in the manufacturing process.
Sodium dichloroisocyanurate is widely used as a source of available chlorine in solid bleach and detergent compositions. and in chlorination of water in swimming pools. It is desirably sold as granules to 70 mesh U.S. standard screen). Since it is generally recovered from manufacturing operations as a powder in the 200 to 400 mesh size range, it is necessary to pelletize the fine material. This may be done by highpressure tableting, followed by crushing, or by sheeting in a roll compactor into corrugated, readily frangible sheets, which are then broken down to granules in any convenient machine.
Both processes have disadvantages. 1n tableting, anhydrous sodium dichloroisocyanurate sticks to the molds, so that it was considered necessary to add a mold lubricant. However, in accordance with Japanese patent 1967-23198, published Nov. 10, 1967, the adhesion of the powder to the mold can be overcome by first adding 4 to 14% of water to the anhydrous material. The resultant hydrate does not stick to the mold, even at the required pressure of 1,000 kilograms per square centimeter (equivalent to about 14,200 pounds per square inch).
1n the sheeting or compaction process, other problems arise. A principal problem is that of excessive fines production. requiring recycle rates of 60 to 80%, where a +70 mesh granule is desired. A second prob lem is that temperature control is essential in the process, since anhydrous sodium dichloroisocyanurate is known to undergo heat-induced decomposition. In order to prevent such decomposition, which can result in actual fires, careful monitoring of the process is required. Additionally, it is essential to avoid contamination of the product with organics such as lubricating oil, since this can cause thermal decomposition of the product.
1 have discovered that the granulation of powdery (200 mesh) sodium dichloroisocyanurate can be safely and efficiently carried out by using a sheeting compactor with sheeting rolls which operate at conventional pressures, of the order of 7,500 i 50% pounds of force per linear inch of roll, and feeding to the rolls powdered sodium dichloroisocyanurate which contains from about 1 1.0 to about 14.0% of water of hydration. This feed produces a sheet which is broken up into a major proportion of +70 mesh material in a standard granulator, reducing the recycle to under 40%, as compared with 60 to 80% when using anhydrous feed. The granular product of desired size, which is screened from the mix, may be used as such, or be dehydrated.
The drawing shows schematically the apparatus used in the practice of this invention.
The invention herein involves the sheeting of hydrated powdered sodium dichloroisocyanurate, and the breaking-up of the sheets into granules.
The process involves apparatus hitherto used in the granulation of anhydrous sodium dichloroisocyanurate; the apparatus is shown in the drawing.
Referring to the drawing, the powdered salt is fed into a hopper 10, and by means of feed screws 12 and 14 into the bite between a fixed roll 16 and a compression roll 18, which is forced against the fixed roll 16 by a compression assembly 20. The sheet of salt 22 which results is fed into a granulator 24 which breaks up the sheet into granules and powder; the product is removed at 26, and is then screened.
The roll 18 may be smooth or otherwise designed. as in the form of a sine wave, to produce the particle size desired for the granulated sodium dichloroisocyanurate product. A typical 4 inch sine wave which has about ten complete inch sine waves in it, about A inch deep. produces a corrugated sheet which breaks up into mainly -10 product.
The roll 18 is forced against the roll 16 by about 7,500 i 50% pounds of force per linear inch of roll. The granulator 24 may be any device which will break up the continuous sheet which is fed from the roller. Since the sheet is readily friable, a simple hammer mill will work, or a mill with simple rotating shear blades (e.g. a Fitz mill).
In operation with powdered anhydrous feed. asheretofore practiced, rather high recycle rates are obtained. In typical runs, recycle of fines runs from 60%, under the very best circumstances, to about which is the normal operating result.
The examples given herein are by way of example only and not by way of limitation. All percents are by weight unless otherwise stated.
EXAMPLE A ANHYDROUS FEED (COMPARATIVE EXAMPLE) the granulator. 1n continuous processing at the rate of about 1,800 pounds per hour, handling thousands of pounds of material, the following particle size distribution was obtained:
U.S. Screen Size Weight Percent Recycle 100 70.0
Note the recycle rate of 78%., which is typical of ordinary production. Under best circumstances. the recycle rate is 60%; it generally runs nearer to 80%.
Additionally, it was necessary to keep a careful eye on the machine, to prevent fires.
EXAMPLE 1 The same compactor rolls and granulator, at the same settings as in Example A were fed with the same raw material, first hydrated with 14.1% of water (the dihydrate); the material had the same particle size distribution as the original material. The product resulting had the following particle size distribution:
Note the reduction in recycle rate, with the resultant startling increase in production possible.
EXAMPLE 2 Example 1 was repeated, except the feed contained 12.6% of water, and the rolls were set at a force of about 8,000 pounds per linear inch of roll. The results were as follows:
U.S. Screen Size Weight Percent ltl Recycle 10 20 33.4 20 30 8.6 30 70 14.6 70 +100 3.0
Recycle 100 39.2
It was noted that small amounts of free water (e.g. 14.7% total 0.6% of free water) further reduced the recycle rate (to below 20% total of material of 70 mesh size in one experiment), but an irritating odor developed during the run, indicating some decomposition of the material. Hence, free water should be avoided.
I use at least about 1 1% of water, this being the point at which the product will no longer sustain propagation of thermal decomposition. At this figure, recycle rates are somewhat higher than when fully hydrated material (14.1% of water) is used, but the recycle rate is still sharply lower than with anhydrous material.
As indicated above, the product can be used as it comes from the process, or it can be dehydrated to produce the anhydrous product.
Obviously, the examples can be multiplied without departing from the scope of the invention as defined in the claim.
What is claimed is: v
1. In the method of producing granular sodium dichloroisocyanurate from -200 mesh powder in which the powder is fed between two rolls, and one ofthe rolls is forced against the other with a force of 7,500 i 5071 pounds per linear inch, to produce a continuous sheet of sodium dichloroisocyanurate which is then broken up into granules and sized, the improvement which comprises feeding the powdered sodium dichloroisocyanurate as hydrated material containing 1 1 to 14% of water of hydration, and free of water not bound as water of hydration whereby the recycle of fines in the process is reduced from a major percentage to a minor percentage.
Claims (1)
1. IN THE METHOD OF PRODUCING GRANULAR SODIUM DICHLOROISOCYANURATE FROM-200 MESH POWDER IN WHICH THE POWDER IS FED BETWEEN TWO ROLLS, AND ONE OF THE ROLLS IS FORCED AGAINST THE OTHER WITH A FORCE OF 7,500$50% POUNDS PER LINEAR INCH, TO PRODUCE A CONTINUOUS SHEET OF SODIUM DICHLOROISOCYANURATE WHICH IS THEN BROKEN UP INTO GRANULES AND SIZED, THE IMPROVEMENT WHICH COMPRISES FEEDING THE POWDERED SODIUM DICHLOROISOCYANURATE AS HYDRATED MATERIAL CONTAINING 11 TO 14% OF WATER OF HYDRATION, AND FREE OF WATER NOT BOUND AS WATER OF HYDRATION WHEREBY THE RECYCLE OF FINES IN THE PROCESS IS REDUCED FROM A MAJOR PERCENTAGE TO A MINOR PERCENTAGE.
Priority Applications (11)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US342511A US3886249A (en) | 1973-03-19 | 1973-03-19 | Production of granular sodium dichloroisocyanurate |
| CA193,522A CA1022553A (en) | 1973-03-19 | 1974-02-26 | Production of granular sodium dichloroisocyanurate |
| IT67731/74A IT1020542B (en) | 1973-03-19 | 1974-03-13 | METHOD FOR THE PRODUCTION OF SODIUM DICHLOROISOCYANURATE GRANULAR |
| JP49028679A JPS49125381A (en) | 1973-03-19 | 1974-03-14 | |
| DE2412262A DE2412262C3 (en) | 1973-03-19 | 1974-03-14 | Process for the preparation of granulated sodium dichloroisocyanurate |
| FR7408837A FR2222377B1 (en) | 1973-03-19 | 1974-03-15 | |
| NL7403580A NL7403580A (en) | 1973-03-19 | 1974-03-18 | |
| GB1195774A GB1417813A (en) | 1973-03-19 | 1974-03-18 | Production of granular sodium dichloroisocyanurate |
| BE142138A BE812460A (en) | 1973-03-19 | 1974-03-18 | PRODUCTION OF GRANULAR SODIUM DICHLOROISOCYANURATE |
| ES424397A ES424397A1 (en) | 1973-03-19 | 1974-03-18 | Production of granular sodium dichloroisocyanurate |
| US05/558,092 US3985744A (en) | 1973-03-19 | 1975-03-13 | Production of granular sodium dichloroisocyanurate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US342511A US3886249A (en) | 1973-03-19 | 1973-03-19 | Production of granular sodium dichloroisocyanurate |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US05/558,092 Continuation-In-Part US3985744A (en) | 1973-03-19 | 1975-03-13 | Production of granular sodium dichloroisocyanurate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US3886249A true US3886249A (en) | 1975-05-27 |
Family
ID=23342152
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US342511A Expired - Lifetime US3886249A (en) | 1973-03-19 | 1973-03-19 | Production of granular sodium dichloroisocyanurate |
Country Status (10)
| Country | Link |
|---|---|
| US (1) | US3886249A (en) |
| JP (1) | JPS49125381A (en) |
| BE (1) | BE812460A (en) |
| CA (1) | CA1022553A (en) |
| DE (1) | DE2412262C3 (en) |
| ES (1) | ES424397A1 (en) |
| FR (1) | FR2222377B1 (en) |
| GB (1) | GB1417813A (en) |
| IT (1) | IT1020542B (en) |
| NL (1) | NL7403580A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4261942A (en) * | 1978-10-30 | 1981-04-14 | Shikoku Kasei Kogyo Co., Ltd. | Production of tablets of sodium dichloroisocyanurate |
| US4296051A (en) * | 1978-10-23 | 1981-10-20 | Shikoku Kasei Kogyo Co., Ltd. | Method of producing granular sodium dichloroisocyanurate |
| US4439384A (en) * | 1981-12-16 | 1984-03-27 | Maschinenfabrick Koppern Gmbh & Co. Kg | Method for manufacturing graules from potassium chloride fines |
| US4925382A (en) * | 1988-01-26 | 1990-05-15 | Maschinenfabrik Koppern Gmbh & Co. Kg | Roller press for compacting fine-grained salts into sheets |
| US5114647A (en) * | 1991-02-01 | 1992-05-19 | Olin Corporation | Effervescent tablets having increased disintegration rates |
| US6513424B1 (en) * | 1998-04-09 | 2003-02-04 | Freund Industrial Co., Ltd. | Device and method for processing powder and granular material |
| US10351450B2 (en) * | 2015-06-03 | 2019-07-16 | Techcross Inc. | Ballast water treatment system by using NaDCC |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2917467B2 (en) * | 1989-09-07 | 1999-07-12 | ロンザ リミテッド | Method for improving the flowability of solid cyanuric chloride |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2755509A (en) * | 1950-07-13 | 1956-07-24 | American Viscose Corp | Process for producing densified granular thermosetting molding compositions |
| US3071816A (en) * | 1960-01-19 | 1963-01-08 | Pittsburgh Plate Glass Co | Calcium chloride manufacture |
| US3548046A (en) * | 1967-11-13 | 1970-12-15 | Shell Oil Co | Granulation of oil-coated water-soluble fine particle of potash material |
-
1973
- 1973-03-19 US US342511A patent/US3886249A/en not_active Expired - Lifetime
-
1974
- 1974-02-26 CA CA193,522A patent/CA1022553A/en not_active Expired
- 1974-03-13 IT IT67731/74A patent/IT1020542B/en active
- 1974-03-14 DE DE2412262A patent/DE2412262C3/en not_active Expired
- 1974-03-14 JP JP49028679A patent/JPS49125381A/ja active Pending
- 1974-03-15 FR FR7408837A patent/FR2222377B1/fr not_active Expired
- 1974-03-18 ES ES424397A patent/ES424397A1/en not_active Expired
- 1974-03-18 GB GB1195774A patent/GB1417813A/en not_active Expired
- 1974-03-18 NL NL7403580A patent/NL7403580A/xx not_active Application Discontinuation
- 1974-03-18 BE BE142138A patent/BE812460A/en unknown
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2755509A (en) * | 1950-07-13 | 1956-07-24 | American Viscose Corp | Process for producing densified granular thermosetting molding compositions |
| US3071816A (en) * | 1960-01-19 | 1963-01-08 | Pittsburgh Plate Glass Co | Calcium chloride manufacture |
| US3548046A (en) * | 1967-11-13 | 1970-12-15 | Shell Oil Co | Granulation of oil-coated water-soluble fine particle of potash material |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4296051A (en) * | 1978-10-23 | 1981-10-20 | Shikoku Kasei Kogyo Co., Ltd. | Method of producing granular sodium dichloroisocyanurate |
| US4261942A (en) * | 1978-10-30 | 1981-04-14 | Shikoku Kasei Kogyo Co., Ltd. | Production of tablets of sodium dichloroisocyanurate |
| US4439384A (en) * | 1981-12-16 | 1984-03-27 | Maschinenfabrick Koppern Gmbh & Co. Kg | Method for manufacturing graules from potassium chloride fines |
| US4925382A (en) * | 1988-01-26 | 1990-05-15 | Maschinenfabrik Koppern Gmbh & Co. Kg | Roller press for compacting fine-grained salts into sheets |
| US5114647A (en) * | 1991-02-01 | 1992-05-19 | Olin Corporation | Effervescent tablets having increased disintegration rates |
| US6513424B1 (en) * | 1998-04-09 | 2003-02-04 | Freund Industrial Co., Ltd. | Device and method for processing powder and granular material |
| US10351450B2 (en) * | 2015-06-03 | 2019-07-16 | Techcross Inc. | Ballast water treatment system by using NaDCC |
Also Published As
| Publication number | Publication date |
|---|---|
| CA1022553A (en) | 1977-12-13 |
| JPS49125381A (en) | 1974-11-30 |
| FR2222377B1 (en) | 1977-09-30 |
| GB1417813A (en) | 1975-12-17 |
| NL7403580A (en) | 1974-09-23 |
| DE2412262B2 (en) | 1979-04-12 |
| BE812460A (en) | 1974-09-18 |
| ES424397A1 (en) | 1976-06-01 |
| FR2222377A1 (en) | 1974-10-18 |
| DE2412262A1 (en) | 1974-09-26 |
| DE2412262C3 (en) | 1979-12-06 |
| IT1020542B (en) | 1977-12-30 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| AS | Assignment |
Owner name: OLIN CORPORATION, 120 LONG RIDGE ROAD, STAMFORD, C Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:FMC CORPORATION, 2000 MARKET STREET, PHILADELPHIA, PA., A CORP. OF DE.;REEL/FRAME:004467/0590 Effective date: 19850816 |
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