Dimethyl phthalate hydrogenation

Also noteworthy is the condensation of dimethyl phthalate (71) with TV.A-bis methoxycar-bonyl)alkyl- and -aryl]amines to give 3F/-3-benzazepines which exist as the intramolecularly hydrogen-bonded enol forms, e.g. 72, rather than the generally more stable benzazepinone tautomers.14... 

Chemical/Physical. Under alkaline conditions, dimethyl phthalate will initially hydrolyze to methyl hydrogen phthalate and methanol. The monoester will undergo hydrolysis forming o-phthalic acid and methanol (Wolfe et al., 1980 Kollig, 1993). A second-order rate constant of 6.9 X 10 /M-sec was reported for the hydrolysis of dimethyl phthalate at 30 °C and pH 8. At 18 °C, the second-order rate constant was 3.1 x lO /M-sec in 1 mM NaOH (Wolfe et al., 1980). Also, hydrolysis half-lives of 3.2 yr was reported at pH 7 and at pH 9 11.6 and 25 d at 30 and 18 °C, respectively (Wolfe et al., 1980). 

Methylhexanoic acid, see 5-Methylhexane Methyl hydrogen phthalate, see Dimethyl phthalate Methyl hydroperoxide, see 1,1-Dimethylhydrazine Methylhydroquinone, see 2-Methylphenol... 

Ziegler catalysts prepared from nickel or cobalt 2-ethylhexanoate and triethylaluminum (3 or 4 1 ratio) are very efficient for the hydrogenation of aromatic compounds.o-Xylene (51) gives a mixture of cis- (52) and trans-1,2-dimethylcyclohexane (53) in 65 35 ratio. Phenol (54), dimethyl phthalate and dimethyl terephthalate are also reduced in high yield, while nitro-substituted benzene and phenols cannot be reduced. Catalytic activity toward benzene hydrogenation decreases in the order Ni > Co > Fe > Cr > Cu. ... 

Chem. Descrip. MEK peroxide in dimethyl phthalate Uses Curing agent for critical gel coals Features R uced level of hydrogen peroxide Properties Clear liq. act. oxygen (9%)... 

Additives used in final products Piasticizers acetyl triethyl citrate, di-(2-ethylhexyl) phthal-ate, diethyl phthalate, dimethyl phthalate, dimethyl sebacate, dioctyi sebacate, polyethylene glycol, polypropylene glycol, sulfolane, toluenesulfonamide derivatives, tri-(2-ethylhexyl) phosphate, triacetin, tributyl citrate, triethyl citrate, triphenyl phosphate Antistatics silver-doped vanadium pentoxide, vanadium pentoxide Antiblocking hydrogenated tallow amide, laponite, silica, talc Release magnesium stearate, sodium benzoate Slip silicone oil ... 

Although reaction of the acid chlorides with hydrogen peroxide and base did not lead to the isolation of definite cyclic peroxides, chemiluminescence was observed. On reacting 9,10-diphenyl anthracene-2,3-dicarboxylicacid dichloride (30) with hydrogen peroxide/tert. amine (e. g. ethyl-dicyclohexylamine-, dicyclo-hexylamine - or urea/H202) in dimethyl phthalate light is emitted. The emission spectrum matched the fluorescence of 9,10-diphenylanthracene-2,3-dicarboxy-late (Xmax. ca. 460nm). The quantum yield is low, with ca. 10 einsteins/mol. 

Tests of the best hydrogen bonding agents in ether-alcohol showed the following compds trimethyl-, trimethallyl-, tributyl phosphates, isophorone, dimethyl acetamide, and dibutyl tartrate were superior to dibutyl phthalate or triacetin in the amts reqd for gelatinization and in the viscosities of the resulting solns... 

The second example is the telomerization of phthalic acid with butadiene yielding bis(octadienyl) phthalates, which can then be hydrogenated to the bisoctyl phthalates which may be used as plastic softeners. The catalyst is formed from palladium bis(acetylacetonate) and tris(p-methoxyphenyl)phosphite in the polar solvent dimethyl sulfoxide. Once again the extraction can be carried out with isooctane [58, 59]. 

C40-60 pareth-3 C40-60 pareth-10 1,10-Decanediol 1,2-Diaminocyclohexane N,N-Diethylcyclohexylamine Diethyl toluene diamine Diisobutyl phthalate Dimer acid, hydrogenated Dimethylaminomethyl phenol Dimethyl terephthalate... 

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