Cyclohexane peroxide

Ciba Irgafos 168 tr (2,4-di-tert-butylphenyl)phosphate, Trisftribromoneopentyl) phosphate Ciba Flamstab NOR TM 116, a reaction product of N, JV -ethane- 1,2-diylbis (1,3-propanediamine). cyclohexane, peroxidized 4- butylamino-2,2,6, 6-tetramethylpiperidine and 2,4,6-trichloro-l,3,5-triazine Magnesium hydroxide, melamine, and novolac APP/petol-based intumescent systems catalyzed by divalent and transition metal compounds... 

Flamstab NOR TM 116, a reaction product of N, N-ethane-1,2-diylbis (1,3-propanediamine). cyclohexane, peroxidized 4-butylamino-2,2,6,6-tetramethylpiperidine and 2,4,6-trichloro-... 

The pyrazole complexes [ReClF N2C(0)Ph (Hpz)2(PPh3)] (24), [ReCl2 N2C(0)Ph (Hpz)(PPh3)2] (25) and [ReClj N2C(0)Ph (Hpz)2(PPh3)l (26), which act as homogeneous catalysts for cyclohexane peroxidative (by H2O2) oxidation (Section 22.2.1), are inactive with O2 [7]. However, when immobilized on 3-aminopropyl functionalized silica, they catalyze the cyclohexane oxidation with dioxygen to cyclohexanol and cyclohexanone (the main product) in the absence of any added solvent and additives and, under relatively mild conditions, up to 16% overall conversion toward the ketone and alcohol, with an overall selectivity of 95% at the O2 pressure of 19 atm, at 150 °C, 8h reaction time (Scheme 22.3) [7],... 

PEG 300 2-[4,6-bis(2,4-dimethylphenyl)-1,3,5-triazin-2-yl]-5-(octyloxy) phenol Screener titanium dioxide zinc oxide carbon black Acid scavenger hydrotalcite Fiber carbon nanotube HAS 1,3,5-triazine-2,4,6-triamine, N,N [1,2-eth-ane-diyl-bis[[[4,6-bis[butyl(1,2,6,6-pentamethyl-4-piperidinyl) amino]-1,3,5-triazine-2-yl]imino]-3,1 -propanediyl]bis[N ,N -dibutyl-N ,N -bis(1,2,2,6,6-pentamethyl-4-piperidinyl)- bis(1,2,2,6,6-pentamethyl-4-piperidyl)sebacate + methyl-1,2,2,6,6-pentamethyl-4-piperidyl sebacate 2,2,6,6-tetrameth-yl-4-piperidinyl stearate reaction products of N,N -ethane-1,2-diylbis(1,3-propanediamine), cyclohexane, peroxidized... 

CycJohexyl free radicals, generated by photolysis of t-butyl peroxide in excess cyclohexane, also possess nucleophilic character (410). Their attack on thiazole in neutral medium leads to an increase of the 2-isomer and a decrease of 5-isomer relative to the phenylation reaction, in agreement with the positive charge of the 2-position and the negative charge of the 5-position (6). 

Absence of peroxides (b) 2 bromo 2 methylbutane (c) 2 bromobutane (d) 1 bromo 1 ethylcyclohexane Presence of peroxides (b) 1 bromo 2 methylbutane (c) 2 bromobutane (d) (1 bromoethyl)cyclohexane... 

High Peroxide Process. An alternative to maximizing selectivity to KA in the cyclohexane oxidation step is a process which seeks to maximize cyclohexyUiydroperoxide, also called P or CHHP. This peroxide is one of the first intermediates produced in the oxidation of cyclohexane. It is produced when a cyclohexyl radical reacts with an oxygen molecule (78) to form the cyclohexyUiydroperoxy radical. This radical can extract a hydrogen atom from a cyclohexane molecule, to produce CHHP and another cyclohexyl radical, which extends the free-radical reaction chain. 

ARCO has developed a coproduct process which produces KA along with propylene oxide [75-56-9] (95—97). Cyclohexane is oxidized as in the high peroxide process to maximize the quantity of CHHP. The reactor effluent then is concentrated to about 20% CHHP by distilling off unreacted cyclohexane and cosolvent tert-huty alcohol [75-65-0]. This concentrate then is contacted with propylene [115-07-1] in another reactor in which the propylene is epoxidized with CHHP to form propylene oxide and KA. A molybdenum catalyst is employed. The product ratio is about 2.5 kg of KA pet kilogram of propylene oxide. 

Other processes explored, but not commercialized, include the direct nitric acid oxidation of cyclohexane to adipic acid (140—143), carbonylation of 1,4-butanediol [110-63-4] (144), and oxidation of cyclohexane with ozone [10028-15-5] (145—148) or hydrogen peroxide [7722-84-1] (149—150). Production of adipic acid as a by-product of biological reactions has been explored in recent years (151—156). 

Organoperoxysulfonic acids and their salts have been prepared by the reaction of arenesulfonyl chlorides with calcium, silver, or sodium peroxide treatment of metal salts of organosulfonic acids with hydrogen peroxide hydrolysis of di(organosulfonyl) peroxides, RS(0)2—OO—S(02)R, with hydrogen peroxide and sulfoxidation of saturated, non aromatic hydrocarbons, eg, cyclohexane (44,181). 

Acetyl cyclohexanesulfonyl peroxide has been produced commercially by the sulfoxidation of cyclohexane, presence of acetic... 

Acetyl cyclohexane sulfonyl peroxide, 7 Acetyl Iodide, 7 Acetyl thiourea, 8 Acetylaminofluorene, 7 Acetylene, 7... 

Solvent dependence of k, for di-r-alkyl peroxides is small when compared to most other peroxide initiators.128 212 For di-/-butyl peroxide,128 d is slightly greater (up to two-fold at 125 °C) in protic (/-butanol, acetic acid) or dipolar aprotic solvents than in other media (cyclohexane, triethylamine, tetrahydrofuran). 

The submitters report that this free radical cyclization was also effected by heating a solution of 5.00 g. (0.026 mole) of ethyl (E)-2-cyano-6-octenoate and 1.25 g. (0.0086 mole) of di-ferf-butyl peroxide [bis(l,l-dimethylethyl)peroxide] in 500 ml. of freshly distilled cyclohexane at 140° in an autoclave for 30 hours. The solution was concentrated and the residue was distilled to yield 3.4 g. (68%) of ethyl l-cyano-2-methylcyclohexanecarboxylate. 

Acetyl cyclohexane-sulphonyl peroxide (28% phthalate solution) o-Azidobenzoyl peroxide t-Butyl mono permaleate (95% dry) t-Butyl peracetate (70%) t-Butyl peractoate... 

One technique to assess lipid peroxidation utilizes second-derivative spectrophotometric analysis of cyclohexane or ethanol-reconstituted extracts to determine the cis-trans and trans-trans isomeric forms of conjugated dienes and oxodiene species within synovial fluid. Using this method, a rise in the synovial fluid concentration of conjugated oxodienes, hydroxydienes and hydroperoxy-dienes was found to follow joint exercise (Merry et al., 1991). 

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