Method for reducing deposition of cokes in heat-refining process of petroleum high-molecular hydrocarbons, and additive used in the method
AssigneesNippon Shokubai Co., Ltd., Elf Atochem S.A.
InventorsToshifumi Hatanaka, Kazuya Hata, Tetsushi Kawamura, Hirokazu Itoh, Yoshiro Arita
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Abstract
Method for reducing deposition of cokes in heat-refining process of petroleum high-molecular hydrocarbons, characterized in that heat-treatment in a heating unit is effected in the presence of at least one compound (I) having at least one mercaprtoalkylthio group: HS--C.sub.m H.sub.2m --S-- in which "m" is an integer of 2 to 4.
Claims9
Method for reducing deposition of cokes in heat-refining process of petroleum high-molecular hydrocarbons, comprising
- heat-treating in a heating unit effected in the presence of at least one compound (I) having at least one mercapto alkylthio group:
- HS--C.sub.m H.sub.2m --S--
- in which "m" is an integer of 2 to 4.
Additive to reducing deposition of cokes in heating unit used in heat-refining process of petroleum high-molecular hydrocarbons, comprising at least one compound (I) having at least one mercaprtoalkylthio group:
- HS--C.sub.m H.sub.2m --S--
- in which "m" is an integer of 2 to 4.
Method for reducing deposition of cokes in heating unit used in heat-refining process of petroleum high-molecular hydrocarbons comprising adding to the heat-refining process a compound (I) having at least one mercaptoalkylthio group:
- HS--C.sub.m H.sub.2m --S--
- in which "m" is an integer of 2 to 4.
Dependencies are inferred from the claim text.