GB912302A - Improvements in or relating to washing polyamide granulate - Google Patents
Improvements in or relating to washing polyamide granulateInfo
- Publication number
- GB912302A GB912302A GB27884/59A GB2788459A GB912302A GB 912302 A GB912302 A GB 912302A GB 27884/59 A GB27884/59 A GB 27884/59A GB 2788459 A GB2788459 A GB 2788459A GB 912302 A GB912302 A GB 912302A
- Authority
- GB
- United Kingdom
- Prior art keywords
- extracting agent
- granulate
- low molecular
- pipe
- extraction
- 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
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G69/00—Macromolecular compounds obtained by reactions forming a carboxylic amide link in the main chain of the macromolecule
- C08G69/46—Post-polymerisation treatment
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D11/00—Solvent extraction
- B01D11/02—Solvent extraction of solids
- B01D11/0215—Solid material in other stationary receptacles
- B01D11/0223—Moving bed of solid material
- B01D11/0242—Moving bed of solid material in towers, e.g. comprising contacting elements
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Extraction Or Liquid Replacement (AREA)
Abstract
A process for the extraction of low molecular weight constituents from granulated poly-S -caprolactam, comprises sliding the granulate downwards through a vertical tube, having a length to diameter ratio of between 5:1 and 100:1, counter-currently to an extracting agent for the low molecular constituents. With reference to the drawing, granulate 21 is introduced into the extraction chamber through <PICT:0912302/IV(a)/1> feed 2, extracting agent being pumped through the pipe 4 into the extraction chamber, the inner wall of the passage 5 being perforated so that the extracting agent is distributed evenly into the chamber, the extracting agent being drawn off through the pipe 6 and the granulate removed through 3. In a modification of the process, the quantity of extracting agent which flows through the column per unit of time is reduced from the bottom upwards through removal points of which one is shown in the drawing (7). The examples describe the use of water as the extracting agent.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH6700258A CH373558A (en) | 1958-12-06 | 1958-12-06 | Process for the extraction of low molecular weight fractions from poly-e-caprolactam granules or chips |
| CH1232576X | 1958-12-06 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB912302A true GB912302A (en) | 1962-12-05 |
Family
ID=29423929
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB27884/59A Expired GB912302A (en) | 1958-12-06 | 1959-08-14 | Improvements in or relating to washing polyamide granulate |
Country Status (2)
| Country | Link |
|---|---|
| FR (1) | FR1232576A (en) |
| GB (1) | GB912302A (en) |
-
1959
- 1959-06-05 FR FR796731A patent/FR1232576A/en not_active Expired
- 1959-08-14 GB GB27884/59A patent/GB912302A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR1232576A (en) | 1960-10-10 |
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