C - Chemistry – Metallurgy – 07 – B
Patent
C - Chemistry, Metallurgy
07
B
260/750, 260/233
C07B 37/00 (2006.01) B01J 19/18 (2006.01) C07H 9/04 (2006.01)
Patent
CA 1268761
ABSTRACT OF THE DISCLOSURE An apparatus and a method for carrying out the dehydration reaction to produce a high boiling compound comprises charging a raw material and an organic solvent into a circulating system including a reactor, a preheater and an evaporator to cause the chemical dehydration reac- tion, drawing water, formed as a result of the dehydration reaction, together with the solvent in the form of vapor, compressing the vapor, effecting a heat exchange between the compressed vapor and the evaporator, dehydrating the com- pressed vapor by condensation, removing the dehydrated water out of the system, and returning the remaining solvent to the reactor. According to the apparatus and the method, the yield of the desired product can be increased while saving energy by the use of vapor recompression technique which effectively shifts the reaction equilibrium to the reaction product side.
493032
Dairaku Toshiaki
Oka Youichi
Yokoyama Masao
Fetherstonhaugh & Co.
Takeda Chemical Industries Ltd.
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