Means for cleaning and decarbonizing or preventing the fouling of the retort or still or the tubes of the heating system therefor.
(1) Note. The means herein are either mechanical, as scrapers, or chemical, as the introduction of air to unite with the carbon.
SEE OR SEARCH CLASS
15, Brushing, Scrubbing, and General Cleaning,
104.001+, and subclass 246.5 for tank cleaner attachments, or Class 414, Material or Article Handling, subclass 291 and other appropriate subclasses, for carbon removing devices which are not claimed as being permanently associated with the retort or still but may be applied to other chambers.
122, Liquid Heaters and Vaporizers,
379+,.
134, Cleaning and Liquid Contact With Solids, appropriate subclasses, for apparatus for cleaning in which a solid is contacted with a liquid. 196, Mineral Oils: Apparatus,
122,.
201, Distillation: Processes, Thermolytic,
2, for a thermolytic distillation process including the step of cleaning the apparatus.
208, Mineral Oils: Processes and Products,
48, for processes of removing deleterious carbon accumulations formed on the equipment during a chemical conversion of the mineral oil.
252, Compositions.
432, Heating,
75, for a furnace including means peculiarly adapted for cleaning the furnace.
