GB1205187A – Separation of trioxane from mixing of trioxane and polyoxymethylene: separation of trioxane from mixture of
– Google Patents
GB1205187A – Separation of trioxane from mixing of trioxane and polyoxymethylene: separation of trioxane from mixture of
– Google Patents
Separation of trioxane from mixing of trioxane and polyoxymethylene: separation of trioxane from mixture of
Info
Publication number
GB1205187A
GB1205187A
GB3114069A
GB3114069A
GB1205187A
GB 1205187 A
GB1205187 A
GB 1205187A
GB 3114069 A
GB3114069 A
GB 3114069A
GB 3114069 A
GB3114069 A
GB 3114069A
GB 1205187 A
GB1205187 A
GB 1205187A
Authority
GB
United Kingdom
Prior art keywords
trioxane
mixture
separation
polyoxymethylene
gas
Prior art date
1968-06-10
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
Application number
GB3114069A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Orkem SA
Original Assignee
Chimique des Charbonnages SA
Priority date (The priority date 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 date listed.)
1968-06-10
Filing date
1969-06-05
Publication date
1970-09-16
1969-06-05
Application filed by Chimique des Charbonnages SA
filed
Critical
Chimique des Charbonnages SA
1970-09-16
Publication of GB1205187A
publication
Critical
patent/GB1205187A/en
Status
Expired
legal-status
Critical
Current
Links
Espacenet
Global Dossier
Discuss
Classifications
C—CHEMISTRY; METALLURGY
C07—ORGANIC CHEMISTRY
C07D—HETEROCYCLIC COMPOUNDS
C07D323/00—Heterocyclic compounds containing more than two oxygen atoms as the only ring hetero atoms
C07D323/04—Six-membered rings
C07D323/06—Trioxane
C—CHEMISTRY; METALLURGY
C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
C08G2/00—Addition polymers of aldehydes or cyclic oligomers thereof or of ketones; Addition copolymers thereof with less than 50 molar percent of other substances
C08G2/28—Post-polymerisation treatments
Abstract
1,205,187. Separation of trioxane from a mixture of trioxane and polyoxymethylene. SOC. CHIMIQUE DES CHARBONNAGES. 5 June, 1969 [10 June, 1968], No. 28438/69. Heading C2C. [Also in Division C3] Trioxane is separated from a mixture of trioxane and polyoxymethylene by treating the mixture with gaseous trioxane or a mixture of at least one inert gas and trioxane in which the partial pressure of trioxane is at least 60 mm. of mercury, the trioxane or the mixture thereof with the inert gas being at a temperature of from 65‹ to 130‹ C. In a preferred embodiment the process is performed in a vertical tower into which the polymer is inserted for extraction and in which a flow of gas melts and subsequently evaporates the remaining monomer. The temperature of the incoming gases is adjusted to 120‹ C. by a heat exchanger at the bottom of the tower. After becoming charged with trioxane, the gas flows into a cyclone where the drops melted at the beginning of the process are collected, and then into a condenser where some of the trioxane vapours condense. The gas leaving the condenser is taken up by a superheated fan and recycled at the head of the tower.
GB3114069A
1968-06-10
1969-06-05
Separation of trioxane from mixing of trioxane and polyoxymethylene: separation of trioxane from mixture of
Expired
GB1205187A
(en)
Applications Claiming Priority (1)
Application Number
Priority Date
Filing Date
Title
FR154351
1968-06-10
Publications (1)
Publication Number
Publication Date
GB1205187A
true
GB1205187A
(en)
1970-09-16
Family
ID=8650964
Family Applications (1)
Application Number
Title
Priority Date
Filing Date
GB3114069A
Expired
GB1205187A
(en)
1968-06-10
1969-06-05
Separation of trioxane from mixing of trioxane and polyoxymethylene: separation of trioxane from mixture of
Country Status (6)
Country
Link
BE
(1)
BE733855A
(en)
DE
(1)
DE1929426C3
(en)
FR
(1)
FR1582098A
(en)
GB
(1)
GB1205187A
(en)
LU
(1)
LU58796A1
(en)
NL
(1)
NL164063C
(en)
Cited By (1)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
WO2005113623A1
(en)
*
2004-05-19
2005-12-01
Basf Aktiengesellschaft
Method for removing residual monomers from polyoxymethylenes
1968
1968-06-10
FR
FR1582098D
patent/FR1582098A/fr
not_active
Expired
1969
1969-05-30
BE
BE733855D
patent/BE733855A/xx
unknown
1969-06-04
LU
LU58796D
patent/LU58796A1/xx
unknown
1969-06-05
GB
GB3114069A
patent/GB1205187A/en
not_active
Expired
1969-06-09
NL
NL6908746A
patent/NL164063C/en
active
1969-06-10
DE
DE19691929426
patent/DE1929426C3/en
not_active
Expired
Cited By (3)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
WO2005113623A1
(en)
*
2004-05-19
2005-12-01
Basf Aktiengesellschaft
Method for removing residual monomers from polyoxymethylenes
US7598339B2
(en)
2004-05-19
2009-10-06
Basf Aktiengesellschaft
Method for removing residual monomers from polyoxymethylenes
KR101179374B1
(en)
2004-05-19
2012-09-03
바스프 에스이
Method for removing residual monomers from polyoxymethylenes
Also Published As
Publication number
Publication date
FR1582098A
(en)
1969-09-26
NL164063B
(en)
1980-06-16
DE1929426B2
(en)
1980-03-13
BE733855A
(en)
1969-11-03
NL6908746A
(en)
1969-12-12
DE1929426C3
(en)
1980-11-06
LU58796A1
(en)
1969-10-28
DE1929426A1
(en)
1969-12-11
NL164063C
(en)
1980-11-17
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Legal Events
Date
Code
Title
Description
1971-01-27
PS
Patent sealed [section 19, patents act 1949]
1981-02-11
PCNP
Patent ceased through non-payment of renewal fee
