Acrolein Dimethyl Acetal Cas:6044-68-4

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Product Description:

Product Name: Acrolein Dimethyl Acetal CAS NO: 6044-68-4

 

Synonyms:

1-Propene, 3,3-dimethoxy-;

3,3-dimethoxyprop-1-ene;

 

Chemical & Physical Properties:

Appearance: Colorless clear liquid

Assay :≥99.00%

Density: 0.862

Boiling Point: 89-90℃

Flash Point: -9℃

Refractive Index: 1.395

Stability: Stable under normal temperatures and pressures.

Storage Condition: 2-8℃

 

Safety Information:

RTECS: UC8500000

Hazard Class: 3.1

Safety Statements: S16-S23-S24/25-S29-S33

HS Code: 2911000000

Packing Group: II

WGK Germany: 3

RIDADR: UN 3384 6.1/PG 1

Risk Statement: R11

Hazard Code: F

 

Acrolein dimethyl acetal is a kind of acetal. Acrolein, as a reaction intermediate, is increasingly used in the synthesis of pharmaceuticals, pesticides, spices, resins and other aspects. General preparation dimethyl acetal acrolein, acrolein diethyl acetal”s approach is to acrolein with methanol or ethanol dehydration condensation reaction under the acid catalyst, but due to the nature of acrolein and lively, unstable in acid medium, and because of the structure of space steric effect is not obvious, and the reaction of methanol, ethanol generates low acetal selectivity, side effects, purified difficulties, Not conducive to industrial mass production. CN201110201192.9 reported that acrolein was reacted with trimethyl orthoformate or triethyl orthoformate under the condition of acid catalyst. Due to the steric hindrance effect of orthoformate in the reaction was greater than that of methanol and ethanol, the corresponding acetal was generated by the reaction, which had high selectivity, less side reactions and easy purification, and was suitable for industrial mass production. The Chemicalbook method is as follows: The 500ml three-mouth flask with stirring device, drip funnel and thermometer is placed in a water bath, add 280g orthoformate trimethyl ester (2.64mol), start stirring, slowly add 1.8g sulfonic acid (0.019mol), the temperature of the water bath device is controlled by 30 40℃, constant drip acrolein 140g(2.54mol), Within 1 hour, continue to stir for 2 hours, and then add sodium carbonate, neutralization to PH7 7.5, stirring for 2 hours, standing for 4 hours, filtration, remove insoluble solids, atmospheric distillation operation, intercepted 89 91 ° C distillate 201g(GC detection, 98.8%), that is, acrolein dimethyl acetal, yield 81.8%.

 

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