CAS No.78-85-3,2-Propenal, 2-methyl- Suppliers

Detail of "78-85-3"

CAS Number:

78-85-3

Name:

2-Propenal, 2-methyl-

Superlist Name:

Methacrolein

Molecular Structure:

Formula:

C₄H₆O

Molecular Weight:

70.09

Synonyms:

Methacrylaldehyde(8CI);2-Formyl-1-propene;2-Methacrolein;2-Methyl-2-propen-1-al;2-Methyl-2-propenal;2-Methylacrolein;2-Methylenepropanal;2-Methylpropenal;Isobutenal;Methacrylic aldehyde;NSC 8260;a-Methylacrolein;a-Methylacrylaldehyde;

EINECS:

201-150-1

Density:

0.807 g/cm³

Melting Point:

-81 °C

Boiling Point:

68 °C at 760 mmHg

Flash Point:

-15 °C

Solubility:

Water: 6 g/100 mL (20 °C)

Appearance:

Colourless to light yellow liquid

Hazard Symbols:

Risk Codes:

11-24/25-34-26

Safety:

16-26-36/37/39-45-28A Details

Transport Information:

UN 2396 3/PG 2

Reference

Oxidation of tert-butyl alcohol to methacrolein: Oxidation of tert-butyl alcohol to methacrolein. Kozharskii, V. A.; Zhiznevskii, V. M.; Tolopko, D. K. (L'vov. Politekh. Inst., Lvov, USSR). Zh. Prikl. Khim. (Leningrad), 57(1), 197-9 (Russian) 1984.In this article, certain chemicals are used. Some of their cas registry numbers are 75-65-0 and 7439-98-7 CODEN: ZPKHAB. ISSN: 0044-4618. DOCUMENT TYPE: Journal CA Section: 35 (Chemistry of Synthetic High Polymers) Section cross-reference(s): 23 Me3COH [75-65-0] is directly oxidized to methacrolein (I) [78-85-3] in the presence of an Fe-Te-Mo catalyst. The optimum conditions of the reaction are: temp. 400-420°, space velocity 0.1-0.15 s-1, and concn. of the alc. in the initial mixt. ith air 4-5 vol.%. Under these conditions the selectivity in I is >80%. Me2CHCH2OH [78-83-1] is also oxidized to I in the presence of this catalyst with selectivity (temp. 370°) 58.2 or 66.6 at space velocity 0.46 or 0.22 s-1, resp. .

Purification of methyl acrylate and methyl methacrylate: Purification of methyl acrylate and methyl methacrylate. (Asahi Chemical Industry Co., Ltd., Japan). Jpn. Kokai Tokkyo Koho JP 58183641 A2 26 Oct 1983 Showa, 5 pp. (Japanese). (Japan). CODEN: JKXXAF. CLASS: IC: C07C069-54; C07C067-60. APPLICATION: JP 82-65075 19 Apr 1982. DOCUMENT TYPE: Patent CA Section: 35 (Chemistry of Synthetic High Polymers) Section cross-reference(s): 23 Crude Me acrylate [96-33-3] or Me methacrylate (I) [80-62-6] prepd. by oxidn. of acrolein (II) [107-02-8] or methacrolein (III) [78-85-3] in MeOH contg. 3-methoxypropanal or 3-methoxy-2-Me propanal (IV) and di-Me acetals of II or III is treated with acidic catalysts to convert those byproducts back to II or III and MeOH, followed by distn. to sep. II or III and MeOH for recycling. Thus, crude I contg. di-Me acetal of methacrolein 0.6, IV 1.3, H2O 1.6, methacrylate acid (V) 1.8, and other impurities 2.0% with 200 ppm hydroquinone and 100 ppm phenothiazine was charged to a still at 350 g/h along with 2.8 g/h of a 30% p-MeC6H4SO3 soln. in MeOH at 81° and 327 mm to give 324 g/h distillate contg. III 1.34, MeOH 1.36, H2O 1.57, V 0.6, other compds. 0.5, and I balance to 100%, and 28.5 g/h bottom contg. III 0.1, MeOH 0.3, IV 0.02, V 15.4, p-MeC6H4SO3H 2.In this experiment, several chemicals are used like 80-62-6 and 96-33-3 8, I 61.4, and other compds. 18.9%. The above distillate was distd. to remove III, MeOH, and H2O. .

Detail of "78-85-3"

2-Propenal, 2-methyl-

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Reference