Method for removing volatile components from a high viscosity liquid by using rotation pack bed

A method for removing a volatile component from a high viscosity liquid by using a rotation pack bed, which comprises the following steps:

• a) introducing a high viscosity liquid into a rotation pack bed rotating around an axis, said rotation pack bed being located in a housing and comprising a central channel region around said axis and an annular pack region surrounding said central channel region, said annular pack region being packed with a packing, and said annular pack region and said central channel region being in fluid communication only through a boundary thereof, and said annular pack region and said housing being in fluid communication only through an outer circumference of said annular pack region, wherein said high viscosity liquid is introduced to a location in said annular pack region so that said high viscosity liquid receives a sufficient centrifugal force at said location and can radially flow through said packing from said location in a direction away from said axis;
• b) introducing a high pressure inert gas at a location near the outer circumference of said annular pack region, and/or connecting said central channel region to a suction source so that, when said highly viscous fluid radially flows through said packing, a volatile component in said high viscosity liquid together with said high pressure inert gas or said volatile component per se flow out of said rotation pack bed and said housing in a gas phase from said central channel region;
• and
• c) collecting a purified liquid, which flows out form the outer circumference of said annular pack region, from a bottom of said housing;
• wherein step a) further comprises introducing a liquid reactant from said central channel region to said rotation pack bed, said liquid reactant flowing through said packing in a radial direction away from said axis by a centrifugal force, and said liquid reactant and said high viscosity liquid generating a chemical reaction, wherein a product of the chemical reaction, as said volatile component, flows out of said rotation pack bed and said housing in a gas phase, and another product of the chemical reaction, unreacted high viscosity liquid and unreacted liquid reactant are collected at the bottom of said housing,
• wherein said high viscosity liquid comprises nonylphenol, said liquid reactant comprises PCl3, said high pressure inert gas is nitrogen, said product of the chemical reaction is HCl which flows out of said rotation pack bed from said central channel region in a gas phase together with the nitrogen, and said another product of the chemical reaction is tris nonylphenol phosphite which, together with unreacted nonylphenol and PCl3, is collected at the bottom of said housing.