VN498A1 - - Google Patents
Info
- Publication number
- VN498A1 VN498A1 VN127195A VN127195A VN498A1 VN 498 A1 VN498 A1 VN 498A1 VN 127195 A VN127195 A VN 127195A VN 127195 A VN127195 A VN 127195A VN 498 A1 VN498 A1 VN 498A1
- Authority
- VN
- Vietnam
- Prior art keywords
- solution
- zones
- heated
- formaldehyde solution
- pouring
- Prior art date
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C47/00—Compounds having —CHO groups
- C07C47/02—Saturated compounds having —CHO groups bound to acyclic carbon atoms or to hydrogen
- C07C47/04—Formaldehyde
-
- 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
- C08G2/08—Polymerisation of formaldehyde
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Saccharide Compounds (AREA)
- Catalysts (AREA)
- Phenolic Resins Or Amino Resins (AREA)
- Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)
- Polyoxymethylene Polymers And Polymers With Carbon-To-Carbon Bonds (AREA)
- Crystals, And After-Treatments Of Crystals (AREA)
- Cosmetics (AREA)
Abstract
The process comprises providing a formaldehyde solution at a concentration of 80-89 %; heating the solution to a temperature of 80-100 DEG C; pouring the heated solution over heated zones on a metal belt conveyor travelling from the heated zones to other, chilled zones. The formaldehyde solution is preferably previously mixed with a catalyst.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ES09402512A ES2087041B1 (en) | 1994-12-09 | 1994-12-09 | PROCEDURE FOR THE PREPARATION OF PARAFORMALDEHYDE. |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| VN498A1 true VN498A1 (en) | 1998-05-25 |
Family
ID=8288212
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| VN127195A VN498A1 (en) | 1994-12-09 | 1995-07-08 |
Country Status (29)
| Country | Link |
|---|---|
| US (1) | US5686554A (en) |
| EP (1) | EP0716104B1 (en) |
| JP (1) | JP2796669B2 (en) |
| KR (1) | KR100249275B1 (en) |
| CN (1) | CN1061641C (en) |
| AT (1) | ATE193308T1 (en) |
| AU (1) | AU695649B2 (en) |
| CA (1) | CA2153452C (en) |
| CZ (1) | CZ288105B6 (en) |
| DE (1) | DE69517138T2 (en) |
| EE (1) | EE03254B1 (en) |
| ES (1) | ES2087041B1 (en) |
| FI (1) | FI113780B (en) |
| GR (1) | GR3034085T3 (en) |
| HR (1) | HRP950396B1 (en) |
| HU (1) | HU214094B (en) |
| MX (1) | MX192468A (en) |
| NO (1) | NO307383B1 (en) |
| NZ (1) | NZ272534A (en) |
| PL (1) | PL179331B1 (en) |
| PT (1) | PT716104E (en) |
| RU (1) | RU2148592C1 (en) |
| SA (1) | SA95160120B1 (en) |
| SG (1) | SG33401A1 (en) |
| TH (1) | TH12621A (en) |
| TW (1) | TW285666B (en) |
| UA (1) | UA44697C2 (en) |
| VN (1) | VN498A1 (en) |
| YU (1) | YU48905B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE69703832T2 (en) * | 1996-03-20 | 2001-04-26 | Celanese Int Corp | USE OF AN AMINE TO IMPROVE PARAFORMALDEHYDE |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3001235A (en) * | 1958-07-26 | 1961-09-26 | Sumitomo Chemical Co | Method for the manufacture of a formaldehyde polymer in a crape-chip form |
| US2992277A (en) | 1959-04-28 | 1961-07-11 | Du Pont | Paraformaldehyde manufacture |
| ES341724A1 (en) * | 1967-06-13 | 1968-10-01 | Ordieres | Improvements introduced in procedures for polymerization of formaldehyde solutions. (Machine-translation by Google Translate, not legally binding) |
| FR1547172A (en) * | 1967-07-17 | 1968-11-22 | Sir Soc Italiana Resine Spa | Paraformaldehyde production process |
| FR2067169A1 (en) * | 1969-11-19 | 1971-08-20 | Charbonnages Ste Chimique | Paraformaldehyde from aq formaldehyde |
| US4550213A (en) | 1984-06-29 | 1985-10-29 | Celanese Corporation | Method of manufacture for paraformaldehyde prills |
| DE3925966A1 (en) | 1989-08-05 | 1991-02-07 | Leuna Werke Veb | Para-formaldehyde] granules prodn. |
| CN1029351C (en) | 1989-09-16 | 1995-07-19 | 陈方 | Making method for polymer formol with high content of formol |
| US5302277A (en) * | 1990-11-28 | 1994-04-12 | Mitsui Toatsu Chemicals, Incorporated | Process for producing paraformaldehyde of high formaldehyde content |
-
1994
- 1994-12-09 ES ES09402512A patent/ES2087041B1/en not_active Expired - Fee Related
-
1995
- 1995-07-03 DE DE69517138T patent/DE69517138T2/en not_active Expired - Fee Related
- 1995-07-03 AT AT95500095T patent/ATE193308T1/en not_active IP Right Cessation
- 1995-07-03 PT PT95500095T patent/PT716104E/en unknown
- 1995-07-03 EP EP95500095A patent/EP0716104B1/en not_active Expired - Lifetime
- 1995-07-04 TH TH160295A patent/TH12621A/en unknown
- 1995-07-05 HU HU9502048A patent/HU214094B/en not_active IP Right Cessation
- 1995-07-05 SG SG1995000805A patent/SG33401A1/en unknown
- 1995-07-06 NO NO952691A patent/NO307383B1/en unknown
- 1995-07-06 TW TW084106964A patent/TW285666B/zh active
- 1995-07-07 CA CA002153452A patent/CA2153452C/en not_active Expired - Fee Related
- 1995-07-07 UA UA95073192A patent/UA44697C2/en unknown
- 1995-07-08 VN VN127195A patent/VN498A1/vi unknown
- 1995-07-10 US US08/499,759 patent/US5686554A/en not_active Expired - Fee Related
- 1995-07-10 HR HRP9402512 patent/HRP950396B1/en not_active IP Right Cessation
- 1995-07-10 NZ NZ272534A patent/NZ272534A/en unknown
- 1995-07-12 EE EE9500040A patent/EE03254B1/en not_active IP Right Cessation
- 1995-07-12 AU AU24960/95A patent/AU695649B2/en not_active Ceased
- 1995-07-14 MX MX9503084A patent/MX192468A/en not_active IP Right Cessation
- 1995-07-15 KR KR1019950020901A patent/KR100249275B1/en not_active IP Right Cessation
- 1995-07-19 JP JP7182422A patent/JP2796669B2/en not_active Expired - Fee Related
- 1995-07-23 SA SA95160120A patent/SA95160120B1/en unknown
- 1995-07-24 CN CN95108639A patent/CN1061641C/en not_active Expired - Fee Related
- 1995-08-02 FI FI953683A patent/FI113780B/en not_active IP Right Cessation
- 1995-08-08 RU RU95113270A patent/RU2148592C1/en not_active IP Right Cessation
- 1995-08-14 YU YU54395A patent/YU48905B/en unknown
- 1995-09-20 PL PL95310573A patent/PL179331B1/en not_active IP Right Cessation
- 1995-09-20 CZ CZ19952439A patent/CZ288105B6/en not_active IP Right Cessation
-
2000
- 2000-08-02 GR GR20000401780T patent/GR3034085T3/en not_active IP Right Cessation
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