(under subclass 46) Processes which include (1) the prevention of the deposit or precipitation of solid carbon on the surfaces of the apparatus employed during a conversion of a mineral oil or (2) the removal of such solid deposits of carbon in combination with a conversion step.
(1) Note. Processes classified herein are directed to the prevention of or removal of carbon deposits from the surfaces of the apparatus, such as would, for example, cause clogging of the pipes, and not carbon which might deposit on the catalyst or inert solids employed in the process.
SEE OR SEARCH THIS CLASS, SUBCLASS:
166+, particularly subclass 167 for processes involving solid-liquid contacting procedures. If it is disclosed that such procedures prevent deposition of carbon on the apparatus, the process is classified in this subclass (48) and cross referenced to the appropriate subclass providing for the manipulation.
SEE OR SEARCH CLASS
122, Liquid Heaters and Vaporizers,
379+, for vaporizers having means to clean the same combined therewith. 134, Cleaning and Liquid Contact With Solids, for decarbonizing procedures, per se. Note particularly
8, 20 and 39.
196, Mineral Oils: Apparatus,
122, for mineral oil vaporizers provided with means for removing carbon from the oil or the vaporizer.
201, Distillation: Processes, Thermolytic,
2, for a process of thermolytic distillation including the step of cleaning the apparatus or removing adhering char product.
202, Distillation: Apparatus,
241, for distillation apparatus with means to remove carbon.
203, Distillation: Processes, Separatory,
7, for a distilling process in which material is added to the system to inhibit deposit formation.
