GB801554A - Improvements in or relating to the manufacture of polyolefins - Google Patents
Improvements in or relating to the manufacture of polyolefinsInfo
- Publication number
- GB801554A GB801554A GB1782755A GB1782755A GB801554A GB 801554 A GB801554 A GB 801554A GB 1782755 A GB1782755 A GB 1782755A GB 1782755 A GB1782755 A GB 1782755A GB 801554 A GB801554 A GB 801554A
- Authority
- GB
- United Kingdom
- Prior art keywords
- detergent
- washing
- polymers
- metal
- oxide
- 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
- C08F6/02—Neutralisation of the polymerisation mass, e.g. killing the catalyst also removal of catalyst residues
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Transition And Organic Metals Composition Catalysts For Addition Polymerization (AREA)
- Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
Abstract
Olefin polymers produced by low pressure polymerization processes are purified by vigorously agitating with an aqueous solution of a detergent. Specified polymers are those of ethylene, propylene, butylene or mixtures thereof prepared at pressures below 500 atmospheres in the presence of (1) mixtures comprising aluminium trichloride, titanium tetrachloride and aluminium powder, (2) chromium oxide on a 90 per cent silica-10 per cent alumina support, optionally stabilized with strontium oxide, (3) an oxide of a Group VI metal on a support, optionally in the presence of an alkali metal, and (4) a compound of a metal of Groups IVa, Va, VIa, VIIa or VIII, together with (a) a Group I, II or III metal, e.g. zinc or aluminium or an alloy thereof, (b) an organo-metallic compound or hydride of a Group I, II or III metal, tin or lead, or (c) an organic boron compound or addition complex thereof. (b) may be in the form of a molecular complex with an ether, thioether or amine or with an alkali metal hydride, alkyl, aryl or halide. (c) may be a complex of an alkali metal hydride with a boron compound of the form BR1, R11, R111, where R1, R11 and R111 represent hydrocarbon radicals, alkoxy or aryloxy groups or hydrogen atoms. The polymerization may be conducted in the presence of solvents, e.g. xylene and iso-octane, optionally in the absence of air. The detergent may be ionic, e.g. sodium stearate, or non-ionic, e.g. condensates of ethylene oxide with octyl phenol and octyl cresol. Before washing with detergent, the polymers may be triturated with an alcohol, e.g. methanol or butanol, or dilute aqueous mineral acid. Preferably, the polymers are stripped by blowing with steam before or during the washing with detergent, and may be freed from detergent by washing with, preferably hot, water. Further washing with dilute aqueous solutions of ammonia or colourless amines, e.g. trimethylamine, may be effected. Specifications 799,392, 799,823 and 801,031 are referred to.
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
BE548742D BE548742A (en) | 1955-06-20 | ||
DENDAT1163030D DE1163030B (en) | 1955-06-20 | Process for purifying polyolefins | |
GB1782755A GB801554A (en) | 1955-06-20 | 1955-06-20 | Improvements in or relating to the manufacture of polyolefins |
FR1151346D FR1151346A (en) | 1955-06-20 | 1956-06-11 | Polyolefin purification process |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1782755A GB801554A (en) | 1955-06-20 | 1955-06-20 | Improvements in or relating to the manufacture of polyolefins |
Publications (1)
Publication Number | Publication Date |
---|---|
GB801554A true GB801554A (en) | 1958-09-17 |
Family
ID=10101906
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1782755A Expired GB801554A (en) | 1955-06-20 | 1955-06-20 | Improvements in or relating to the manufacture of polyolefins |
Country Status (4)
Country | Link |
---|---|
BE (1) | BE548742A (en) |
DE (1) | DE1163030B (en) |
FR (1) | FR1151346A (en) |
GB (1) | GB801554A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3000871A (en) * | 1958-01-17 | 1961-09-19 | Shell Oil Co | Method for purifying polyolefin |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2119976A (en) * | 1935-04-12 | 1938-06-07 | Monsanto Chemicals | Method of forming resinous hydrocarbon polymers |
US2212155A (en) * | 1938-11-01 | 1940-08-20 | Du Pont | Process for polymerizing ethylene |
DE874215C (en) * | 1943-12-18 | 1953-04-20 | Basf Ag | Process for the production of solid polymers from ethylene or ethylene-rich gases |
GB682420A (en) * | 1949-06-10 | 1952-11-12 | Du Pont | Improvements in or relating to the polymerisation of ethylene |
DE973626C (en) * | 1953-11-17 | 1960-04-14 | Karl Dr Dr E H Ziegler | Process for the production of high molecular weight polyethylenes |
DE961576C (en) * | 1955-05-15 | 1957-04-11 | Hoechst Ag | Process for washing polyethylene in countercurrent |
-
0
- BE BE548742D patent/BE548742A/xx unknown
- DE DENDAT1163030D patent/DE1163030B/en active Pending
-
1955
- 1955-06-20 GB GB1782755A patent/GB801554A/en not_active Expired
-
1956
- 1956-06-11 FR FR1151346D patent/FR1151346A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3000871A (en) * | 1958-01-17 | 1961-09-19 | Shell Oil Co | Method for purifying polyolefin |
Also Published As
Publication number | Publication date |
---|---|
DE1163030B (en) | 1964-02-13 |
FR1151346A (en) | 1958-01-29 |
BE548742A (en) |
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