Methyl methacrylate isobutane

A recent achievement worthy of note is the manufacture of microspheres containing an inert gas, e.g. nitrogen, or a volatile liquid, such as the freons The patent literature contains methods for producing microspheres based on poly(vinyl chloride) and poly(divinyl chloride), containing isobutane or carbon tetrachloride 52>, and based on poly(methyl methacrylate), containing neopentane . Microspheres containing liquid dyes and oils are also used to make syntactic foams 58>. 

Butane has been isomerized to isobutane in 95% yield (at 24.5% conversion) with platinum/Cs2 5H0.5PW12O40 at 200-300X. under hydrogen at 0.05 atm.294 The hydrogen reduced deactivation of the catalyst. The oxidation of isobutane to isobutylene is needed for the synthesis of tert-butyl methyl ether to put into gasoline. Isobutylene, in turn, can be oxidized to methacrylic acid for conversion to methyl methacrylate, an important monomer (6.56). Making methyl methacrylate this way avoids the use of toxic hydrogen cyanide in the present commercial process. 

On the other hand, new processes are being researched, such as i) the named Alpha process via ethylene carbonylation to methyl propionate, very similar to the aforementioned BASF route ii) the one-step method of propyne catal3dic carbonylation and iii) direct oxidation of isobutane to methacrolein or methacrylic acid. The use of isobutyraldehyde and isobutyric acid as feedstocks has also been explored. Among all these methods, the one employing the alkane in a one-step reaction to form methacrylic acid is the most simple and interesting process from both... 

Methylphenol) see p-Cresol (2-Methyl-1-phenylpropane) see Isobutylbenzene (2-Methylpropane) see Isobutane (Methylpropenoate) see Methyl acrylate (2-Methylpropenoic acid) see Methacrylic acid (2-Methylpropylamine) see Isobutylamine (Methyl propyl ketone) see 2-Pentanone (2-Methylpyridine) see a-Picoline (3-Methylpyridine) see p-Picoline A-Methyl-2-pyrrolidone (NMP)... 

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