GB603872A - Improvements in and relating to polyformals - Google Patents
Improvements in and relating to polyformalsInfo
- Publication number
- GB603872A GB603872A GB29111/45A GB2911145A GB603872A GB 603872 A GB603872 A GB 603872A GB 29111/45 A GB29111/45 A GB 29111/45A GB 2911145 A GB2911145 A GB 2911145A GB 603872 A GB603872 A GB 603872A
- Authority
- GB
- United Kingdom
- Prior art keywords
- formal
- methylal
- paraformaldehyde
- produce
- formaldehyde
- 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
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C41/00—Preparation of ethers; Preparation of compounds having groups, groups or groups
- C07C41/60—Preparation of compounds having groups or groups
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
Polyformals of the formula: RO(CH2O)nR in which R is a cycloalkyl, or an alkyl group and n is an integer greater than 1 are obtained by reacting formaldehyde or its polymers with a dicycloalkyl or a dialkyl formal in the presence of an acid reacting catalyst and then adding a basic substance in an amount at least sufficient to neutralize the catalyst preferably when an equilibrium composition is reached. The reaction is advantageously carried out at 80-100 DEG C. Specified dialkyl and dicycloalkyl formals are methylal, diethyl formal, dicyclohexyl formal, di-isopropyl formal, di-n-propyl formal and dibutyl formal, whilst the formaldehyde reactant may be monomeric or polymeric formaldehyde, e.g. paraformaldehyde, paraformaldehyde hydrate or trioxane. Common inorganic acids, such as sulphuric acid, are specified as acid reacting catalysts. In examples: (1) diisobutyl formal is heated with paraformaldehyde in the presence of sulphuric acid and made basic with sodium methoxide to produce p diisobutoxymethyl ether and tri-(oxymethylene) diisobutyl ether; (2) ethylal is treated as in (1) under pressure to produce diand tri-(oxymethylene) diethyl ethers; (3) methylal-methanol azeotrope and paraformaldehyde are refluxed together in the presence of sulphuric acid and neutralized with caustic soda to produce dimethoxymethyl ether and tri- and tetra-(oxymethylene) dimethyl etheric (4) methylal is treated as in (2); (5) methylal and formaldehyde are refluxed in the presence of sulphuric acid and the product made alkaline to produce dimethoxymethyl ether.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US603872XA | 1944-11-02 | 1944-11-02 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB603872A true GB603872A (en) | 1948-06-24 |
Family
ID=22029148
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB29111/45A Expired GB603872A (en) | 1944-11-02 | 1945-11-02 | Improvements in and relating to polyformals |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB603872A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1070755A1 (en) * | 1999-07-22 | 2001-01-24 | SNAMPROGETTI S.p.A. | Liquid mixture consisting of diesel gas oils and oxygenated compounds |
| WO2006045506A1 (en) * | 2004-10-25 | 2006-05-04 | Basf Aktiengesellschaft | Method for producing polyoxymethylene dimethyl ethers |
| WO2007000428A1 (en) * | 2005-06-29 | 2007-01-04 | Basf Aktiengesellschaft | Biodiesel fuel mixture containing polyoxymethylene dialkyl ether |
| US7999140B2 (en) * | 2005-06-15 | 2011-08-16 | Basf Aktiengesellschaft | Method for the production of polyoxymethylene dialkyl ethers from trioxan and dialkylethers |
| CN107522602A (en) * | 2017-09-08 | 2017-12-29 | 青岛迈特达新材料有限公司 | A kind of technique and system for preparing DMM2 |
| EP3714691A1 (en) * | 2019-03-28 | 2020-09-30 | Arkema France | Aqueous composition made of polyoxymethylene dialkyl ethers (pom) and use thereof for conservation and/or embalming of the human or animal body |
-
1945
- 1945-11-02 GB GB29111/45A patent/GB603872A/en not_active Expired
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1070755A1 (en) * | 1999-07-22 | 2001-01-24 | SNAMPROGETTI S.p.A. | Liquid mixture consisting of diesel gas oils and oxygenated compounds |
| EP1505049A1 (en) * | 1999-07-22 | 2005-02-09 | SNAMPROGETTI S.p.A. | A process for the selective production of dialkyl-polyformals |
| WO2006045506A1 (en) * | 2004-10-25 | 2006-05-04 | Basf Aktiengesellschaft | Method for producing polyoxymethylene dimethyl ethers |
| JP2008517960A (en) * | 2004-10-25 | 2008-05-29 | ビーエーエスエフ ソシエタス・ヨーロピア | Process for producing polyoxymethylene dimethyl ether |
| US7999140B2 (en) * | 2005-06-15 | 2011-08-16 | Basf Aktiengesellschaft | Method for the production of polyoxymethylene dialkyl ethers from trioxan and dialkylethers |
| WO2007000428A1 (en) * | 2005-06-29 | 2007-01-04 | Basf Aktiengesellschaft | Biodiesel fuel mixture containing polyoxymethylene dialkyl ether |
| CN101213274B (en) * | 2005-06-29 | 2011-12-07 | 巴斯福股份公司 | Biodiesel fuel mixture containing polyoxymethylene dialkyl ether |
| CN107522602A (en) * | 2017-09-08 | 2017-12-29 | 青岛迈特达新材料有限公司 | A kind of technique and system for preparing DMM2 |
| EP3714691A1 (en) * | 2019-03-28 | 2020-09-30 | Arkema France | Aqueous composition made of polyoxymethylene dialkyl ethers (pom) and use thereof for conservation and/or embalming of the human or animal body |
| US11903380B2 (en) | 2019-03-28 | 2024-02-20 | Arkema France | Aqueous composition based on polyoxymethylene dialkyl ethers (POM) and their use for the preservation and/or embalming of the human or animal body |
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