Patent ID: 7332070
Filing Date: 2008-02-19
Classification: C08F,C10G,F28F,Y10S

Abstract:
1. A method of preventing the fouling of a heat exchanger, which comprises adding 0.01 to 100 weight ppm of a nonionic surfactant to component (Z) comprising at least 70 wt % hydrocarbon at a temperature of 0 to 200° C. at a pressure of 0 to 10 MPa before cooling the component (Z) in the heat exchanger, wherein the nonionic surfactant is a polyoxyalkylene compound represented by the following general formula [II]: wherein m, n and p each represent the average number of repeating units, and m is in the range of 1 to 20, n is 2 to 50 and p is 1 to 20.