GB907065A - Process for the removal of aromatic impurities from liquid phenyl methyl polysiloxanes - Google Patents
Process for the removal of aromatic impurities from liquid phenyl methyl polysiloxanesInfo
- Publication number
- GB907065A GB907065A GB771261A GB771261A GB907065A GB 907065 A GB907065 A GB 907065A GB 771261 A GB771261 A GB 771261A GB 771261 A GB771261 A GB 771261A GB 907065 A GB907065 A GB 907065A
- Authority
- GB
- United Kingdom
- Prior art keywords
- siloxane
- extracting
- extracting agent
- impure
- aromatic impurities
- 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
- 125000003118 aryl group Chemical group 0.000 title abstract 3
- 239000012535 impurity Substances 0.000 title abstract 3
- -1 polysiloxanes Polymers 0.000 title abstract 3
- 125000001797 benzyl group Chemical group [H]C1=C([H])C([H])=C(C([H])=C1[H])C([H])([H])* 0.000 title abstract 2
- 239000007788 liquid Substances 0.000 title abstract 2
- 229920001296 polysiloxane Polymers 0.000 title abstract 2
- 239000003795 chemical substances by application Substances 0.000 abstract 5
- KPUWHANPEXNPJT-UHFFFAOYSA-N disiloxane Chemical class [SiH3]O[SiH3] KPUWHANPEXNPJT-UHFFFAOYSA-N 0.000 abstract 3
- 238000000605 extraction Methods 0.000 abstract 3
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 abstract 2
- DNIAPMSPPWPWGF-UHFFFAOYSA-N Propylene glycol Chemical compound CC(O)CO DNIAPMSPPWPWGF-UHFFFAOYSA-N 0.000 abstract 2
- 238000004821 distillation Methods 0.000 abstract 2
- ZWVMLYRJXORSEP-UHFFFAOYSA-N 1,2,6-Hexanetriol Chemical compound OCCCCC(O)CO ZWVMLYRJXORSEP-UHFFFAOYSA-N 0.000 abstract 1
- HXKKHQJGJAFBHI-UHFFFAOYSA-N 1-aminopropan-2-ol Chemical compound CC(O)CN HXKKHQJGJAFBHI-UHFFFAOYSA-N 0.000 abstract 1
- PIICEJLVQHRZGT-UHFFFAOYSA-N Ethylenediamine Chemical compound NCCN PIICEJLVQHRZGT-UHFFFAOYSA-N 0.000 abstract 1
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical class [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 abstract 1
- GSEJCLTVZPLZKY-UHFFFAOYSA-N Triethanolamine Chemical compound OCCN(CCO)CCO GSEJCLTVZPLZKY-UHFFFAOYSA-N 0.000 abstract 1
- 150000001414 amino alcohols Chemical class 0.000 abstract 1
- 235000010290 biphenyl Nutrition 0.000 abstract 1
- 239000004305 biphenyl Substances 0.000 abstract 1
- 125000006267 biphenyl group Chemical group 0.000 abstract 1
- 125000001309 chloro group Chemical class Cl* 0.000 abstract 1
- 238000010438 heat treatment Methods 0.000 abstract 1
- PQPVPZTVJLXQAS-UHFFFAOYSA-N hydroxy-methyl-phenylsilicon Chemical compound C[Si](O)C1=CC=CC=C1 PQPVPZTVJLXQAS-UHFFFAOYSA-N 0.000 abstract 1
- ZUOUZKKEUPVFJK-UHFFFAOYSA-N phenylbenzene Natural products C1=CC=CC=C1C1=CC=CC=C1 ZUOUZKKEUPVFJK-UHFFFAOYSA-N 0.000 abstract 1
- 229920000768 polyamine Polymers 0.000 abstract 1
- CHKVPAROMQMJNQ-UHFFFAOYSA-M potassium bisulfate Chemical compound [K+].OS([O-])(=O)=O CHKVPAROMQMJNQ-UHFFFAOYSA-M 0.000 abstract 1
- 229910000343 potassium bisulfate Inorganic materials 0.000 abstract 1
- 235000013772 propylene glycol Nutrition 0.000 abstract 1
- 238000004064 recycling Methods 0.000 abstract 1
- 150000005846 sugar alcohols Polymers 0.000 abstract 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07F—ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
- C07F7/00—Compounds containing elements of Groups 4 or 14 of the Periodic Table
- C07F7/02—Silicon compounds
- C07F7/08—Compounds having one or more C—Si linkages
- C07F7/20—Purification, separation
-
- 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
- C08G77/00—Macromolecular compounds obtained by reactions forming a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon in the main chain of the macromolecule
- C08G77/04—Polysiloxanes
- C08G77/32—Post-polymerisation treatment
- C08G77/34—Purification
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Silicon Polymers (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
Aromatic impurities, such as diphenyl and its chlorine derivatives, are removed from liquid phenylmethyl polysiloxanes by extracting, without distillation, the impure siloxanes with a polyhydric alcohol, an amino alcohol or a mono- or polyamine. In examples a phenylmethyl siloxane oil containing chlorinated aromatic impurities, was continuously extracted with (1) 1,2-dihydroxypropane, and (2) 2-(b -hydroxyethylamino)-ethylamine, in an apparatus consisting of an upright cylindrical extraction tube fitted with a stirrer and steam heating coil and having at the bottom end a conical taper connected through a U-tube with a distillation vessel, the vapour space of which is connected to a condenser situated so that condensed extracting agent drops back into the extraction tube; during continuous recycling of the extracting agent, the impure siloxane is passed through an upwardly directed nozzle at the bottom of the extraction tube, collects above the denser extracting agent and is finally taken off as raffinate through an overflow pipe. (3) The impure siloxane and extracting agent of (2) were stirred for 1 hour at 90 DEG C., after which the upper siloxane layer was siphoned off, washed with saturated NaCl solution and filtered through a layer of KHSO4. Other extracting agents specified are 1,2-dihydroxyethane, 1,2,6-trihydroxyhexane, tri-(2-hydroxyethyl)-amine, 1-amino-2-hydroxypropane and 1,2-diaminoethane. Specification 907,066 is referred to.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEF30707A DE1138945B (en) | 1961-03-08 | 1961-03-08 | Process for the purification of liquid phenylmethylpolysiloxanes from added silicon-free aromatic compounds |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB907065A true GB907065A (en) | 1962-10-03 |
Family
ID=7093880
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB771261A Expired GB907065A (en) | 1961-03-08 | 1961-03-02 | Process for the removal of aromatic impurities from liquid phenyl methyl polysiloxanes |
Country Status (2)
| Country | Link |
|---|---|
| DE (1) | DE1138945B (en) |
| GB (1) | GB907065A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5618902A (en) * | 1995-11-03 | 1997-04-08 | General Electric Company | Vapor precipitation of polymers from solvent polymer blends by azeotropic spray drying |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1066749B (en) | 1959-10-08 | General Electric Company, Schenectady. N. Y. (V. St. A.) | Process for improving the properties of high molecular weight organopolysiloxanes which can be converted into elastomers | |
| BE533847A (en) * | 1953-12-03 | 1958-06-06 | Gen Electric | SILICONE RUBBER SHALL SHRINK ON COMPRESSION. |
-
1961
- 1961-03-02 GB GB771261A patent/GB907065A/en not_active Expired
- 1961-03-08 DE DEF30707A patent/DE1138945B/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| DE1138945B (en) | 1962-10-31 |
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