CA2150392A1 - Recovery of glycols from used glycol-containing technical fluids - Google Patents
Recovery of glycols from used glycol-containing technical fluidsInfo
- Publication number
- CA2150392A1 CA2150392A1 CA002150392A CA2150392A CA2150392A1 CA 2150392 A1 CA2150392 A1 CA 2150392A1 CA 002150392 A CA002150392 A CA 002150392A CA 2150392 A CA2150392 A CA 2150392A CA 2150392 A1 CA2150392 A1 CA 2150392A1
- Authority
- CA
- Canada
- Prior art keywords
- glycol
- containing technical
- glycols
- used glycol
- recovery
- 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.)
- Granted
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C29/00—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom not belonging to a six-membered aromatic ring
- C07C29/74—Separation; Purification; Use of additives, e.g. for stabilisation
- C07C29/76—Separation; Purification; Use of additives, e.g. for stabilisation by physical treatment
- C07C29/80—Separation; Purification; Use of additives, e.g. for stabilisation by physical treatment by distillation
- C07C29/82—Separation; Purification; Use of additives, e.g. for stabilisation by physical treatment by distillation by azeotropic distillation
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C31/00—Saturated compounds having hydroxy or O-metal groups bound to acyclic carbon atoms
- C07C31/18—Polyhydroxylic acyclic alcohols
- C07C31/20—Dihydroxylic alcohols
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C41/00—Preparation of ethers; Preparation of compounds having groups, groups or groups
- C07C41/01—Preparation of ethers
- C07C41/34—Separation; Purification; Stabilisation; Use of additives
- C07C41/40—Separation; Purification; Stabilisation; Use of additives by change of physical state, e.g. by crystallisation
- C07C41/42—Separation; Purification; Stabilisation; Use of additives by change of physical state, e.g. by crystallisation by distillation
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C43/00—Ethers; Compounds having groups, groups or groups
- C07C43/02—Ethers
- C07C43/03—Ethers having all ether-oxygen atoms bound to acyclic carbon atoms
- C07C43/04—Saturated ethers
- C07C43/10—Saturated ethers of polyhydroxy compounds
- C07C43/11—Polyethers containing —O—(C—C—O—)n units with ≤ 2 n≤ 10
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K5/00—Heat-transfer, heat-exchange or heat-storage materials, e.g. refrigerants; Materials for the production of heat or cold by chemical reactions other than by combustion
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Combustion & Propulsion (AREA)
- Thermal Sciences (AREA)
- Materials Engineering (AREA)
- Crystallography & Structural Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
A novel process for recovering glycols from used glycol-containing technical fluids is disclosed. Used glycol-containing technical fluids has added to it an organic solvent which forms with the glycols to be separated off, an azeotropic mixture which has a lower boiling point than the glycol itself. This azeotropic mixture is then distilled off. A typical used glycol-containing technical fluid as used is antifreeze. The preferred organic solvent is a xylene or a pseudocumene.
Prior to the addition of solvent which forms the azeotropic mixture with the glycol, a water portion in the used glycol-containing technical fluid, if present, can also be advantageously first removed by distillation.
Prior to the addition of solvent which forms the azeotropic mixture with the glycol, a water portion in the used glycol-containing technical fluid, if present, can also be advantageously first removed by distillation.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CA002150392A CA2150392C (en) | 1995-05-29 | 1995-05-29 | Recovery of glycols from used glycol-containing technical fluids |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CA002150392A CA2150392C (en) | 1995-05-29 | 1995-05-29 | Recovery of glycols from used glycol-containing technical fluids |
Publications (2)
Publication Number | Publication Date |
---|---|
CA2150392A1 true CA2150392A1 (en) | 1996-11-30 |
CA2150392C CA2150392C (en) | 2001-08-14 |
Family
ID=4155943
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA002150392A Expired - Fee Related CA2150392C (en) | 1995-05-29 | 1995-05-29 | Recovery of glycols from used glycol-containing technical fluids |
Country Status (1)
Country | Link |
---|---|
CA (1) | CA2150392C (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104230658A (en) * | 2014-09-26 | 2014-12-24 | 吉林化工学院 | New method for separating ethanediol and 1, 2-pentanediol from corn fermentation liquid |
-
1995
- 1995-05-29 CA CA002150392A patent/CA2150392C/en not_active Expired - Fee Related
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104230658A (en) * | 2014-09-26 | 2014-12-24 | 吉林化工学院 | New method for separating ethanediol and 1, 2-pentanediol from corn fermentation liquid |
Also Published As
Publication number | Publication date |
---|---|
CA2150392C (en) | 2001-08-14 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
EEER | Examination request | ||
MKLA | Lapsed |