Purification method of the gas inside the PET stretching furnace which uses the catalyst and the same catalyst for purification of gas inside PET stretching furnace and dirty prevention method of the PET stretching furnace

摘要

The PET oligomer in the gas inside the stretching furnace of the PET stretching device offer of the catalyst which it disassembles processes in high invert ratio and simultaneously the acetaldehyde etc the stretching furnace by the offer of the catalyst which simultaneously oxidation it disassembles processes aldehydes, the offer, and the said catalyst of the catalyst whose durability is high (the tenter) purification method of the inside gas offer. Including at least with the inorganic oxide and the platinum of 1 kinds of alumina and zirconia, the catalyst for purification of gas inside PET stretching furnace which becomes, contains the PET oligomer. The hot blast which includes the volatile PET oligomer which occurs the occasion where the PET film is produced with stretching furnace, it makes the furnace inner thigh the above-mentioned catalyst contact which is provided in outdoor, in the temperature range of 200 - the 350 , it oxidizes disassembles the aforementioned volatile PET oligomer, the cracked gas it includes the process which circulates to the aforementioned stretching furnace, purification method of the gas inside the PET stretching furnace and dirty prevention method of the PET stretching furnace.