Search results
Results from the WOW.Com Content Network
The Dow process is a method of phenol production through the hydrolysis of chlorobenzene. ... while cine substitution product 2-[14 C]-phenol was formed in 43% yield, ...
The Dow process may refer to: Dow process (bromine), a method of bromine extraction from brine; Dow process (magnesium), a method of magnesium extraction from brine; Dow process (phenol), a method of phenol production through the hydrolysis of chlorobenzene
At one time, chlorobenzene was the main precursor for the manufacture of phenol: [10] C 6 H 5 Cl + NaOH → C 6 H 5 OH + NaCl. The reaction is known as the Dow process, with the reaction carried out at 350 °C using fused sodium hydroxide without solvent.
[2] [3] This process converts two relatively cheap starting materials, benzene and propylene, into two more valuable ones, phenol and acetone. Other reactants required are oxygen from air and small amounts of a radical initiator. Most of the worldwide production of phenol and acetone is now based on this method.
The Raschig–Hooker process's ability to make phenol makes it comparable to other methods, such as the Dow and Bayer process, which also converts benzene into phenol. In fact, the ability to recycle the hydrogen chloride made the Raschig–Hooker process preferable to the Dow and Bayer process, which requires its sodium chloride product to be ...
At the time, phenol was obtained from coal as a co-product of coke ovens and the manufacture of gas for gas lighting. Laclede Gas reports being asked to expand production of phenol (and toluene) to assist the war effort. [16] Both Monsanto [17] and Dow Chemical [18] began manufacturing synthetic phenol in 1915, with Dow being the main producer ...
Herbert Henry Dow (February 26, 1866 – October 15, 1930) was an American chemical industrialist who founded the American multinational conglomerate Dow Chemical.A graduate of the Case School of Applied Science in Cleveland, Ohio, he was a prolific inventor of chemical processes, compounds, and products, notably bromine extraction from sea water, and was a successful businessman.
Phenol is an organic compound appreciably soluble in water, with about 84.2 g dissolving in 1000 ml (0.895 M). Homogeneous mixtures of phenol and water at phenol to water mass ratios of ~2.6 and higher are possible. The sodium salt of phenol, sodium phenoxide, is far more water-soluble. It is a combustible solid (NFPA rating = 2).