Middle oil of coal tar distillation, Chemistry

Assignment Help:

Middle oil of coal-tar distillation comprise naphthalene and phenolic elements. Phenolic compounds are isolated in subsequent steps.

Step a: Middle oil is washed along with H2SO4. It dissolves basic impurities such as pyridine (base).

Step b: Extreme cooling separates naphthalene (a low melting solid)

Step c: Filtrate of step b is treated with aqueous NaOH when phenols dissolve as phenoxides. Carbon dioxide is then given by the solution to liberate phenols.

Step d: Crude phenol (of step c) is subjected to fractional distillation.


Related Discussions:- Middle oil of coal tar distillation

practical, How can you identify the phenolic-OH gr. of an organic compound...

How can you identify the phenolic-OH gr. of an organic compound which also contain an electron withdrawing group?

Lithium aluminum hydride, Lithium aluminum hydride Lithium aluminum hy...

Lithium aluminum hydride Lithium aluminum hydride reduces the carbonyl group to an alcohol.

What are distinguishing characteristics of metallic bonding, What are disti...

What are distinguishing characteristics of metallic bonding?  Metallic  state  can  be  visualized  like an  array  of positive  ions,  with  a  common  pool  of electrons to

High initial permeability in fe-ni alloys, Illustrate how a high initial pe...

Illustrate how a high initial permeability in Fe-Ni alloys helps to reduce the area under hysteresis loop. The most favourably oriented fully-grown domain tends to rotate so a

An electron has kinetic energy, An electron has kinetic energy 2.8 x 10 -2...

An electron has kinetic energy 2.8 x 10 -23 J . de-Broglie wavelength will be nearly: (me: 9.1 x 10 -31 kg) (1) 9.28x 10 -4 m                 (2) 9.28 x10 -7 m

hyperconjugation, Ask question hyperconjugation in carbine

Ask question hyperconjugation in carbines

Chemical combination, what are differences and similarities between covalen...

what are differences and similarities between covalent bond and electrovalent bond

Briefly explain about alloys, Q. Briefly explain about Alloys? Ans. ...

Q. Briefly explain about Alloys? Ans. Pure metals are malleable. Metals that are harder, stronger and less malleable are sometimes required. These characteristics may be a

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd