GB846515A - Improvements in or relating to agglomerating agents - Google Patents
Improvements in or relating to agglomerating agentsInfo
- Publication number
- GB846515A GB846515A GB2828/58A GB282858A GB846515A GB 846515 A GB846515 A GB 846515A GB 2828/58 A GB2828/58 A GB 2828/58A GB 282858 A GB282858 A GB 282858A GB 846515 A GB846515 A GB 846515A
- Authority
- GB
- United Kingdom
- Prior art keywords
- copolymers
- methacrylic acid
- units
- dimethacryloylimide
- per cent
- 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
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/54—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08C—TREATMENT OR CHEMICAL MODIFICATION OF RUBBERS
- C08C1/00—Treatment of rubber latex
- C08C1/14—Coagulation
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Environmental & Geological Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Water Supply & Treatment (AREA)
- Engineering & Computer Science (AREA)
- Hydrology & Water Resources (AREA)
- General Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
Abstract
70% by weight of methacrylic acid and 30% by weight of methacrylamide were polymerized in a 20% aqueous solution with 0,5% by weight of potassium persulphate. The white granular copolymer was washed with water and dried in vacuo to constant weight at 50 DEG C. The product was then heated dry for 4 hours to 180 DEG C. and the ammonia split off. The resulting product corresponds in composition to a copolymer of methacrylic acid, methacrylamide and dimethacryloylimide. An alkali metal or ammonium salt of the product is soluble in water. Specifications 730,464, 764,004 and 818,249 are referred to.ALSO:The process of Specification 818,249 provides derivatives, for settling calcium carbonate from raw sugar juices comprising of methyl methacrylic polymers and copolymers in which said polymers or copolymers are subjected to hydrolysis and/or alcoholysis in the presence of ammonia and/or amines at temperatures above 180 DEG C. to give a derivative containing recurring units of dimethacryloylimide as well as recurring units of methacrylic acid wherein the copolymers/comprise at least 25 mol per cent of methacrylic acid units and at least 10 mol per cent of dimethacryloylimide units. These substances and/or their alkali metal or alkaline earth metal salts thereof may be used for the sedimenting of solid particles in aqueous suspensions. When treating aqueous suspensions a concentration of less than 4 grams and preferably less than 1 gram need be applied for every 1000 litres of the aqueous suspension being treated. Specifications 730,464 and 764,004 also are referred to.ALSO:The process of Specification 818,249 provides derivatives, of methyl methacrylic polymers and copolymers in which said polymers or copolymers are subjected to hydrolysis and/or alcoholysis in the presence of ammonia and/or amines at temperatures above 180 DEG C. to give a deriaative containing recurring units of dimethacryloylimide as well as recurring units of methacrylic acid wherein the copolymers comprise at least 25 mol. per cent. of methacrylic acid units and at least 10 mol per cent. of dimethacryloylimide units. These substances and/or their alkali metal or alkaline earth metal salts thereof may be used as p agglomerating agents for the improvement of soil. For soil treatment the substance may be diluted with an inert substance such as clay or chalk or a fertilizer. Specification 730,464 and 764,004 are also referred to.ALSO:The derivatives of Specification 818,249 [Group IV(a)] comprising methyl methacrylic polymers and copolymers in which said polymers or copolymers are subjected to hydrolyis and/or alcoholysis in the presence of ammonia and/or amines at temperatures above 180 DEG C. to give a derivative containing recurring units of dimethylacryloylimide as well as recurring units of methacrylic acid, wherein the copolymers comprise at least 25 mol. per cent. of methacrylic acid units and at least 10 mol per cent. of dimethacryloylimide units, and/or their alkali metal or alkaline earth metal salts, may be used as agglomerating agents, e.g. for settling calcium carbonate from raw sugar juices, by addition of 3 grams of the copolymer to each 1,000 litres of juice. Specifications 730,464 and 764,004 also are referred to.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE846515X | 1957-01-28 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB846515A true GB846515A (en) | 1960-08-31 |
Family
ID=6775082
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2828/58A Expired GB846515A (en) | 1957-01-28 | 1958-01-28 | Improvements in or relating to agglomerating agents |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB846515A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4090955A (en) * | 1976-05-05 | 1978-05-23 | American Cyanamid Company | Selective flocculation of minerals from a mixture or an ore |
GB2000154A (en) * | 1977-06-09 | 1979-01-04 | Gaf Corp | Preparation of linear cyclic polyimides from latices |
-
1958
- 1958-01-28 GB GB2828/58A patent/GB846515A/en not_active Expired
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4090955A (en) * | 1976-05-05 | 1978-05-23 | American Cyanamid Company | Selective flocculation of minerals from a mixture or an ore |
GB2000154A (en) * | 1977-06-09 | 1979-01-04 | Gaf Corp | Preparation of linear cyclic polyimides from latices |
GB2000154B (en) * | 1977-06-09 | 1982-03-17 | Gaf Corp | Preparation of linear cyclic polyimides from latices |
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