GB856577A - Recovery of polymers from solutions thereof and polymers so recovered - Google Patents
Recovery of polymers from solutions thereof and polymers so recoveredInfo
- Publication number
- GB856577A GB856577A GB18166/57A GB1816657A GB856577A GB 856577 A GB856577 A GB 856577A GB 18166/57 A GB18166/57 A GB 18166/57A GB 1816657 A GB1816657 A GB 1816657A GB 856577 A GB856577 A GB 856577A
- Authority
- GB
- United Kingdom
- Prior art keywords
- methyl
- polymer
- ketone
- solvent
- polymers
- 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
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F10/00—Homopolymers and copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
- Separation, Recovery Or Treatment Of Waste Materials Containing Plastics (AREA)
Abstract
A polymer of a 1- olefin having a maximum of eight carbon atoms and no branching nearer the double band than the 4-position is recovered from its solution in a hydrocarbon solvent by precipitating a portion only of the polymer separating the resultant precipitate from the supernatant liquid and adding to this liquid an anti-solvent so as to precipitate dissolved polymer p from the supernatant liquid. Specified polymers are those of ethylene and/or propylene, of 1,3 butadiene and of isoprene. The hydrocarbon solvents listed are paraffins and cycloparaffins, while anti-solvents are acetone, methyl ethyl ketone, methyl isooctane ketone, methyl propyl ketone and ethyl propyl ketone, methyl, ethyl, isopropyl, n-buxyl, n-propyl, isobutyl and amyl alcohols. The polymer is preferably prepared using chromium oxide containing a substantial proportion of hexavalent chromium associated with at least one of silica, alumina zirconia and thoria as catalyst. The precipitate may also be washed with an anti-solvent. Apparatus for carrying out the process is described. Specifications 790,195 and 804,641 are referred to.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US856577XA | 1956-07-02 | 1956-07-02 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB856577A true GB856577A (en) | 1960-12-21 |
Family
ID=22193098
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB18166/57A Expired GB856577A (en) | 1956-07-02 | 1957-06-07 | Recovery of polymers from solutions thereof and polymers so recovered |
Country Status (3)
Country | Link |
---|---|
BE (1) | BE558674A (en) |
FR (1) | FR1177930A (en) |
GB (1) | GB856577A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10961367B2 (en) | 2017-11-20 | 2021-03-30 | Polystyvert Inc. | Processes for recycling polystyrene waste |
US11407877B2 (en) | 2018-10-26 | 2022-08-09 | Polystvert Inc. | Processes for recycling polystyrene waste and/or polystyrene copolymer waste |
US11407878B2 (en) | 2014-10-03 | 2022-08-09 | Polystyvert Inc. | Processes for recycling polystyrene waste |
US12018132B2 (en) | 2022-07-03 | 2024-06-25 | Polystyvert Inc. | Processes for recycling polystyrene waste and/or polystyrene copolymer waste |
-
0
- BE BE558674D patent/BE558674A/xx unknown
-
1957
- 1957-06-07 GB GB18166/57A patent/GB856577A/en not_active Expired
- 1957-06-24 FR FR1177930D patent/FR1177930A/en not_active Expired
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11407878B2 (en) | 2014-10-03 | 2022-08-09 | Polystyvert Inc. | Processes for recycling polystyrene waste |
US10961367B2 (en) | 2017-11-20 | 2021-03-30 | Polystyvert Inc. | Processes for recycling polystyrene waste |
US11680149B2 (en) | 2017-11-20 | 2023-06-20 | Polystyvert Inc. | Processes for recycling polystyrene waste |
US11407877B2 (en) | 2018-10-26 | 2022-08-09 | Polystvert Inc. | Processes for recycling polystyrene waste and/or polystyrene copolymer waste |
US12018132B2 (en) | 2022-07-03 | 2024-06-25 | Polystyvert Inc. | Processes for recycling polystyrene waste and/or polystyrene copolymer waste |
Also Published As
Publication number | Publication date |
---|---|
FR1177930A (en) | 1959-04-30 |
BE558674A (en) |
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