GB1499762A - Process for reducing the content of vinyl chloride monomer in suspension polymers of vinyl chloride - Google Patents
Process for reducing the content of vinyl chloride monomer in suspension polymers of vinyl chlorideInfo
- Publication number
- GB1499762A GB1499762A GB19767/75A GB1976775A GB1499762A GB 1499762 A GB1499762 A GB 1499762A GB 19767/75 A GB19767/75 A GB 19767/75A GB 1976775 A GB1976775 A GB 1976775A GB 1499762 A GB1499762 A GB 1499762A
- Authority
- GB
- United Kingdom
- Prior art keywords
- vinyl chloride
- polymer
- steam
- treatment
- monomer
- 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
- C08F6/00—Post-polymerisation treatments
- C08F6/001—Removal of residual monomers by physical means
- C08F6/003—Removal of residual monomers by physical means from polymer solutions, suspensions, dispersions or emulsions without recovery of the polymer therefrom
Landscapes
- Chemical & Material Sciences (AREA)
- Dispersion Chemistry (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)
Abstract
1499762 Removing vinyl chloride monomer from a vinyl chloride polymer CHEMISCHE WERKE HULS AG 12 May 1975 [27 June 1974 29 Aug 1974 (2)] 19767/75 Headings C3P and C3G A process for reducing the content of unpolymerized vinyl chloride monomer in a vinyl chloride suspension polymer is characterized in that steam at a temperature of 80-150 C. is passed through a vinyl chloride suspension polymer which is moist with water. The duration of the steam treatment may be from 5 seconds to 10 minutes. The water content of the polymer which is moist with water may be 15-35% by weight. The weight ratio of polymer moist with water to steam may be 50 : 2- 50 : 50 and the extracted vinyl chloride monomer may be recovered from the vapour from the steam treatment. The specific examples refer to the treatment of polyvinyl chloride and an ethylene-vinyl acetate copolymer grafted with vinyl chloride (Example 3). In the case of heterogeneous gas systems the treatment with the steam may be carried out by the polymer falling freely in a fall tower, by pneumatic conveying or by fluidizing. In the case of poured polymers the treatment may be carried out on a porous base, e.g. steaming in a container provided with a porous base. Alternative continuously operating equipment are porous conveyer belts and conveyer troughs, screw conveyers, rotary filters and belt filters. The preliminary dehydration of and removal of monomer may be carried out in the same equipment, e.g. rotary filters, belt filters and screentype centrifuges.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19742430901 DE2430901B2 (en) | 1974-06-27 | 1974-06-27 | Process for reducing the content of monomeric vinyl chloride in polymers of vinyl chloride |
| DE19742441289 DE2441289B2 (en) | 1974-08-29 | 1974-08-29 | Process for reducing the content of monomeric vinyl chloride in polymers of vinyl chloride |
| DE19742441290 DE2441290B2 (en) | 1974-08-29 | 1974-08-29 | Process for reducing the content of monomers! Vinyl chloride in polymers of vinyl chloride » |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1499762A true GB1499762A (en) | 1978-02-01 |
Family
ID=27185985
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB19767/75A Expired GB1499762A (en) | 1974-06-27 | 1975-05-12 | Process for reducing the content of vinyl chloride monomer in suspension polymers of vinyl chloride |
Country Status (10)
| Country | Link |
|---|---|
| JP (1) | JPS5118783A (en) |
| AT (1) | AT336275B (en) |
| BR (1) | BR7504007A (en) |
| CH (1) | CH602801A5 (en) |
| ES (1) | ES437224A1 (en) |
| FI (1) | FI751858A (en) |
| FR (1) | FR2276322A1 (en) |
| GB (1) | GB1499762A (en) |
| NL (1) | NL7507625A (en) |
| NO (1) | NO752238L (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5126807A (en) * | 1974-08-07 | 1976-03-05 | Shinetsu Chemical Co | Jugobutsukarano monomaakaishuhoho |
| JPS5283404A (en) * | 1975-12-29 | 1977-07-12 | Mitsubishi Monsanto Chem Co | Elimination of monomers |
| JPS59223962A (en) * | 1983-06-01 | 1984-12-15 | Victor Co Of Japan Ltd | Highly dense information signal recording medium |
-
1975
- 1975-04-30 ES ES437224A patent/ES437224A1/en not_active Expired
- 1975-05-12 GB GB19767/75A patent/GB1499762A/en not_active Expired
- 1975-06-11 FR FR7518211A patent/FR2276322A1/en not_active Withdrawn
- 1975-06-13 AT AT454475A patent/AT336275B/en active
- 1975-06-23 NO NO752238A patent/NO752238L/no unknown
- 1975-06-23 FI FI751858A patent/FI751858A/fi not_active Application Discontinuation
- 1975-06-24 JP JP50078468A patent/JPS5118783A/ja active Pending
- 1975-06-24 CH CH821475A patent/CH602801A5/xx not_active IP Right Cessation
- 1975-06-26 BR BR5152/75D patent/BR7504007A/en unknown
- 1975-06-26 NL NL7507625A patent/NL7507625A/en not_active Application Discontinuation
Also Published As
| Publication number | Publication date |
|---|---|
| ATA454475A (en) | 1976-08-15 |
| CH602801A5 (en) | 1978-08-15 |
| FI751858A (en) | 1975-12-28 |
| JPS5118783A (en) | 1976-02-14 |
| ES437224A1 (en) | 1977-01-01 |
| BR7504007A (en) | 1976-07-06 |
| FR2276322A1 (en) | 1976-01-23 |
| NL7507625A (en) | 1975-12-30 |
| AT336275B (en) | 1977-04-25 |
| NO752238L (en) | 1975-12-30 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed [section 19, patents act 1949] | ||
| 729S | Offer to surrender (sect. 29/1977) | ||
| 729A | Offer accepted by the comptroller (sect. 29/1977) |