1,3-Dioxolane,4-methyl-
1,3-Dioxolane,4-methyl-
CAS: 98-47-5
Molecular Formula: C4H8O2
1,3-Dioxolane,4-methyl- - Names and Identifiers
| Name | 1,3-Dioxolane,4-methyl- |
| Synonyms | 4-Methyl-1,3-dioxolane 1,3-Dioxolane,4-methyl- 1,3-Dioxolane,4-methyl- 4-Methyl-1,3-dioxolane Einecs 214-008-9 4-METHYLDIOXOLANE 4-methyl-3-dioxolane |
| CAS | 98-47-5 |
1,3-Dioxolane,4-methyl- - Physico-chemical Properties
| Molecular Formula | C4H8O2 |
| Molar Mass | 88.1051 |
| Density | 0.983 g/mL at 25 °C(lit.) |
| Boling Point | 85°C(lit.) |
| Flash Point | 28 °F |
| Refractive Index | 0 |
1,3-Dioxolane,4-methyl- - Risk and Safety
| Hazard Symbols | F - Flammable |
| Risk Codes | R11 - Highly Flammable R19 - May form explosive peroxides |
| Safety Description | S16 - Keep away from sources of ignition. |
| UN IDs | UN 1993 3/PG 2 |
1,3-Dioxolane,4-methyl- - Preparation of 4-methyl -1, 3-dioxane
from Palm Bridge research
Application (patent) number:
CN201810926866.3
application date:
2018-08-15
Public/Announcement Number:
CN110835329A
Public/announcement date:
2020.02.25
applicant (patent):
Zhangjiagang guotaihuarong New Chemical Materials Co., Ltd.
inventor:
Chang nan , Liu Lei , Yunlong Lu , Chen Xiaohua , Chen Xiaorong , Chen Mingkai
National and provincial code:
CN320582
Abstract:
The invention discloses a preparation method of 4 methyl 1,3 dioxane, which comprises the following steps: 1. Adding a solvent, formaldehyde and a catalyst to a reactor, the temperature is raised to 60 ° C., the solvent is an organic solvent having a boiling point of more than 120 ° C. And immiscible with water, and the catalyst is a solid base catalyst; 2, 2 propylene glycol, the reaction temperature is controlled at 65 ℃ ~ 95 ℃; Three, after the reaction is finished, the liquid is separated to obtain the water layer and the crude layer, and the crude layer is filtered to obtain the crude product, the crude product was purified by vacuum distillation after adding polymerization inhibitor, and 4 methyl 1,3 dioxane was obtained.
The advantages of the present invention are:
first, low purification difficulty, less by-products, high yield.
Two, good affinity for the environment, in line with the National Sustainable Development Policy.
Three, less waste, easy to handle, simple process route, reaction is easy to control, suitable for industrial production. Four, the product purity is high, can reach more than 99.5%, the moisture content is low.
Last Update：2024-01-02 23:10:35
1,3-Dioxolane,4-methyl- - Synthesis of 2, 4-dimethyl-2-(4-methyl-3-pentenyl)-1, 3-dioxanone catalyzed by supported Heteropoly acid
from VIP Journal Professional Edition
Author:
Peng Anshun , Xia Min , Jin Xueyong
Abstract:
2,4Dimethyl2(4methyl3Pentenyl)1,3dioxolane were synthesized with the phosphotungstic acid supported on cationic exchange resin as a catalyst.Various factors that affect the condensation yield were investigated.The results showed that the optimum conditions were as follows:6methyl5heptene2one:1,2Propandiol:catalyst:dehydrating agent is 1 mol:15mol:12g:200ml;reaction temperature was reflux temperature;reaction time was 25h.The yield was above 915% under the optimum conditions.The catalyst can be used repeatedly.
stowed
Key words:
immobilized heteropolyacid catalytic synthesis 2, 4-dimethyl-2-(4-methyl-3-pentenyl)-1,3-dioxane ion exchange resin cyclo-Ketal spices
DOI:
CNKI:SUN:HXYJ.0.2003-02-024
year:
2003
Last Update：2024-01-02 23:10:35
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