FR1471932A - Procédé de purification du dianhydride pyromellique - Google Patents
Procédé de purification du dianhydride pyromelliqueInfo
- Publication number
- FR1471932A FR1471932A FR54656A FR54656A FR1471932A FR 1471932 A FR1471932 A FR 1471932A FR 54656 A FR54656 A FR 54656A FR 54656 A FR54656 A FR 54656A FR 1471932 A FR1471932 A FR 1471932A
- Authority
- FR
- France
- Prior art keywords
- purification process
- pyromellic
- dianhydride
- pyromellic dianhydride
- purification
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B3/00—Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools
- B24B3/36—Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools of cutting blades
- B24B3/44—Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools of cutting blades of scythes or sickles
-
- A—HUMAN NECESSITIES
- A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
- A24C—MACHINES FOR MAKING CIGARS OR CIGARETTES
- A24C5/00—Making cigarettes; Making tipping materials for, or attaching filters or mouthpieces to, cigars or cigarettes
- A24C5/14—Machines of the continuous-rod type
- A24C5/28—Cutting-off the tobacco rod
- A24C5/30—Machines combined with devices for grinding the knives
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C51/00—Preparation of carboxylic acids or their salts, halides or anhydrides
- C07C51/54—Preparation of carboxylic acid anhydrides
- C07C51/573—Separation; Purification; Stabilisation; Use of additives
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Mechanical Engineering (AREA)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR54656A FR1471932A (fr) | 1965-03-24 | 1966-03-23 | Procédé de purification du dianhydride pyromellique |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEG43153A DE1289039B (de) | 1965-03-24 | 1965-03-24 | Verfahren zur Reinigung von Pyromellithsaeuredianhydrid |
FR54656A FR1471932A (fr) | 1965-03-24 | 1966-03-23 | Procédé de purification du dianhydride pyromellique |
Publications (1)
Publication Number | Publication Date |
---|---|
FR1471932A true FR1471932A (fr) | 1967-03-03 |
Family
ID=25978685
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR54656A Expired FR1471932A (fr) | 1965-03-24 | 1966-03-23 | Procédé de purification du dianhydride pyromellique |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR1471932A (fr) |
-
1966
- 1966-03-23 FR FR54656A patent/FR1471932A/fr not_active Expired
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