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Class Numbers & Titles | Class Numbers Only | USPC Index | International | HELP |
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Class 208 | MINERAL OILS: PROCESSES AND PRODUCTS |
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1 | SYNTHETIC DRYING OILS |
2 | PHENOLIC OR TOXIC OILS |
3 | OXIDATION OF MINERAL OILS |
390 | TAR SAND TREATMENT WITH LIQUID |
400 | BY TREATMENT OF SOLID MINERAL, E.G., COAL LIQUEFACTION, ETC. |
401 | Including a test or measurement |
402 | Using electrical, magnetic or wave energy |
403 | Chemical modification of solids before hydrogenation |
404 | Using molten additive, e.g., heat carrier, etc. |
407 | Specified agitation or circulation in gas contact zone |
408 | Gas includes hydrogen |
409 | Vertical gas upflow, e.g., fluidization, etc. |
411 | Using solid heat carrier |
412 | Plural hydrogenation steps |
414 | With hydrogen production from water |
415 | Including contact of feed with liquid produced in the process, i.e., recycle |
416 | With discrete hydrogenation of recycle stream |
417 | Recycle of bottoms (resid) |
418 | Including contact with hydrogen gas |
419 | Using specifically added catalyst during hydrogenation |
420 | Dissolved or suspended-thermally-decomposable catalyst, component or precursor |
421 | Containing Group VI transition metal |
423 | Containing Group VIII metal |
424 | Specified procedure to improve separation of solids from liquid product |
426 | Including agglomeration, comminution or size-classification of solids |
427 | Including burning of feed or product |
428 | Including contact with extraneous additive other than hydrogen, e.g., solvent, etc. |
429 | Distinct addition zones |
430 | Contact with additive, followed by chemical conversion |
431 | Specified hydrogen-donor solvent |
432 | With specified circulation procedure in contact zone |
433 | Simultaneous treatment with gaseous additive and liquid solvent |
434 | Additive is petroleum or fraction from petroleum refining |
435 | Additive is specified catalyst or liquid solvent or dispersant |
12 | COLORNG TREATMENTS (INCLUDES FLUORESCENCE) |
13 | TREATMENT OF REFINING SLUDGE |
14 | PRODUCTS AND COMPOSITIONS |
24 | PARAFFIN WAX; TREATMENT OR RECOVERY |
25 | With ureas |
26 | With sorption agents |
27 | Chemical treatment (refining or modification except mere solvent extraction) |
28 | Separation of paraffin from oil (e.g., dewaxing) |
39 | ASPHALTS, TARS, PITCHES AND RESINS; MAKING, TREATING AND RECOVERY |
40 | By chemical conversion of oil |
41 | By distillation |
44 | Chemical modification of asphalt, tar, pitch or resin |
45 | Solvent extraction |
46 | CHEMICAL CONVERSION OF HYDROCARBONS |
47 | With prevention of corrosion or erosion in system |
48R | With prevention or removal of deleterious carbon accumulations or equipment |
49 | Plural serial stages of chemical conversion |
50 | Coking in at least one stage |
56 | Hydrogen donor diluent cyclic processes |
57 | First stage is an hydrogenation (saturation) |
58 | First stage is hydrocracking (includes hydro-desulfurization under cracking conditions) |
59 | Hydrocracking in all stages |
60 | With subsequent reforming |
61 | With subsequent thermal or catalytic cracking |
62 | First stage is reforming |
67 | First stage is thermal or catalytic cracking |
78 | Plural parallel stages of chemical conversion |
81 | With contacting vapor porducts with liquid feed (i.e., product scrubbing and feed stripping) |
82 | Only selected fractions of product or feed are contacted |
83 | With subsequent fractionation |
84 | With added material (to scrubbing-stripping stage) |
85 | With preliminary treatment of feed |
95 | With subsequent treatment of products |
106 | Cracking |
107 | Hydrogenative |
108 | Catalytic |
109 | Silica or silicate containing catalyst |
110 | With metal or metal oxide |
111.01 | With group III metal, rare earth metal, or metal oxide (i.e., Sc, Y, Al, Ga, ln, Tl, metal of atomic number 57-71, or oxide thereof) |
111.05 | With group VII metal or metal oxide (i.e., Mn, Tc, Re, or oxide thereof) |
111.1 | With group IV metal or metal oxide (i.e., Ti, Zr, Hf, Ge, Sn, Pb, or oxide thereof) |
111.15 | With group I metal or metal oxide (i.e., alkali metal, Ag, Au, Cu, or oxide thereof) |
111.2 | With group V metal or metal oxide (i.e., V, Nb, Ta, As, Sb, Bi, or oxide thereof) |
111.25 | With group II metal or metal oxide (i.e., alkaline earth metal, Be, Mg, Zn, Cd, Hg, or oxide thereof) |
111.3 | With group VI metal or metal oxide (i.e., Cr, Mo, W, Po, or oxide thereof) |
111.35 | With group VIII metal or metal oxide (i.e., iron, or platinum group metal, or oxide thereof) |
112 | Metal or metal oxide catalyst |
113 | Catalytic |
114 | Phosphorus, boron or nitrogen containing catalyst |
115 | Halogen containing catalyst |
118 | Silica or silicate containing catalyst |
119 | With metal or metal oxide |
120.01 | With group III metal, rare earth metal, or metal oxide (i.e., Sc, Y, Al, Ga, In, Tl, metal of atomic number 57-71 or oxide thereof) |
120.05 | With group VII metal or metal oxide (i.e., Mn, Tc, Re, or oxide thereof) |
120.1 | With group IV metal or metal oxide (i.e., Ti, Zr, Hf, Ge, Sn, Pb, or oxide thereof) |
120.15 | With group I metal or metal oxide (i.e., alkali metal, Ag, Au, Cu, or oxide thereof) |
120.2 | With group V metal or metal oxide (i.e., V, Nb, Ta, As, Sb, Bi, or oxide thereof) |
120.25 | With group II metal or metal oxide (i.e., alkaline earth metal, Be, Mg, Zn, Cd, Hg, or oxide thereof) |
120.3 | With group VI metal or metal oxide (i.e., Cr, Mo, W, Po, or oxide thereof) |
120.35 | With group VIII metal or metal oxide (i.e., iron or platinum group metal, or oxide thereof) |
121 | Metal or metal oxide containing catalyst |
125 | With nonreactive material |
131 | Soaking |
132 | With heating in tubular confined stream |
133 | Reforming (includes dehydrogenation, isomerization, cyclization, aromatization, alkylation, dealkylation reactions) |
142 | Hydrogenation (saturation) |
146 | Solids contacting and mixing |
147 | Separate contiguous, dissimilar function, contacting zones |
148 | Combined gravitating bed and suspension zones |
149 | Solids of dissimilar composition |
150 | Purging |
152 | Solids replenishment, or selective discard |
153 | Suspension system |
154 | Start-up and shut down procedures |
155 | Plural zones of similar function |
157 | Liquid feed |
158 | With augmented turbulence (in addition to normal mixing in bed) |
159 | With temperature regulation |
161 | Separation of entrained fines from effluents |
163 | Fluidized dense bed |
165 | Gravitating compact beds |
166 | Liquid feeding |
168 | Solids-vapor disengagement |
169 | Plural zones of similar function (same chamber) |
170 | Size stratification prevention |
171 | Uniform solids withdrawal |
172 | Preheating or quenching with solids |
173 | Solids transferring |
176 | Solids moving processes |
177 | REFINING |
178 | With reagent feed control |
179 | Purifying used oil |
180 | With added organic material |
181 | Plural treating agents (sequential or simultaneous) |
184 | Distillation or degassing |
187 | Water removal (dehydration) |
189 | Sweetening |
190 | With hypochlorites |
191 | With copper compounds |
192 | With preliminary treatment of oil |
193 | With subsequent treatment of the sweet oil |
195 | Copper chloride and free oxygen containing gas |
196 | With peroxides |
197 | With lead compounds |
203 | With alkali metal hydroxide or carbonate |
207 | Nitrogen containing compound |
208R | Sulfur removal (free or combined sulfur) |
209 | With hydrogen |
210 | Plural stage treatments with hydrogen |
211 | With preliminary treatment of feed |
212 | With subsequent treatment of product |
213 | With solid catalyst or absorbent |
218 | Split treatment |
219 | With acids |
220 | Plural stages of sulfur removal |
221 | With preliminary treatment of feed |
222 | With subsequent treatment of product |
223 | Inorganic acid |
226 | With alkali or alkali earth metal compound (except clays) |
227 | Plural stages of sulfur removal |
228 | With preliminary treatment of feed |
229 | With subsequent treatment of product |
230 | Alkali metal compound |
236 | With nitrogen containing treating reagent |
237 | With organic reagent |
241 | With free halogen or nonmetal halide containing reagent |
242 | With sulfur oxides |
243 | With Group VI metal or compound |
244 | With Group VIII metal or compound |
245 | With silicon or compound thereof |
246 | With Group IB metal or compound |
247 | With Group IIB metal or compound |
248 | With Group III metal or compound |
249 | With Group IV, V, VII metal or compound |
250 | Solids contacting and mixing |
208M | Using free alkali metal |
251R | Metal contaminant removal |
254R | Nitrogen contaminant removal |
255 | Gum or gum former removal |
262.1 | Halogen contaminant removal |
263 | Organic acid or phenol contaminant removal |
264 | With hydrogen |
265 | With acids |
266 | Sulfuric acid |
267 | With fluid rotation or agitation |
268 | White oil making |
269 | Split treatment |
270 | Plural stages of acid treatment |
271 | With preliminary treatment of the oil |
273 | With subsequent treatment of the oil |
276 | With nonwater additive |
279 | Phosphorus containing acid |
280 | Halogen containing acid |
282 | Organic acid |
283 | With alkali or alkali earth metal compound (except clays) |
289 | With nitrogen containing compound |
290 | With organic compound |
292 | With boron, phosphorus, arsenic, antimony or bismuth containing treating agent |
293 | With sulfur containing treating agent |
294 | With free metal |
295 | With Group IV, V, VI, VII or VIII metal compound |
296 | With Group IB or IIB metal compound |
297 | With Group III metal compound (except clays) |
298 | With liquid treating agent (includes slurries of solids) |
299 | With solid catalyst or absorbent |
300 | Of particular physical shape or structure |
301 | With preliminary treatment of the oil |
302 | With subsequent treatment of the oil |
303 | Plural treating stages |
304 | Processes including downward movement of particles |
305 | Solids rehabilitation |
306 | Composite or plural treating agents |
307 | Silicon or carbon containing treating agent |
308 | FRACTIONATION |
309 | Deasphalting |
310R | Adsorption |
311 | Liquid extraction with solvents |
312 | With blending of separated fractions with each other or with feed |
313 | Extractive distillation |
314 | Plural stages with different oil miscible solvents |
315 | With recycle of product of later extraction to earlier extraction stage |
316 | Difference is mere change in proportions of solvents |
317 | Counter current multistage extraction |
318 | With recycle of oil |
319 | With pressure variation |
320 | With temperature gradient in extraction zone or between extraction zones |
321 | With solvent rehabilitation |
322 | Organic solvent containing |
323 | With added solvent or solvent modifier |
325 | Heterocyclic |
328 | Nonoxo carbonylic |
330 | Nitrogen-containing solvent |
332 | Oxo compound containing |
333 | Oxy compound |
336 | Halogen containing |
337 | Hydrocarbon |
338 | Liquid sulfur dioxide |
339 | Liquid-liquid contacting |
340 | Recovery of mineral oil from natural or converted gases |
347 | Distillation |
348 | With nonvapor compound added prior to or during vaporization |
349 | With nonvaporization treatment of liquid condensate or residue |
350 | Rectification |
351 | C1-C4 alkane removal |
352 | Flash vaporizaton |
353 | With heat recovery by indirect heat exchange |
354 | Plural or combined with additional distillation |
356 | With added gas or vapor (e.g., steam) |
357 | Vacuum or pressure |
358 | With liquid product recycle to rectification zone |
359 | Spraying |
360 | Filming |
361 | Flash vaporization |
362 | With added gas or vapor |
364 | Plural stages of vaporization |
366 | Vacuum or pressure |
367 | With agitation of distilland |
368 | Condensatin by direct heat exchange |
369 | Volatile treatment other than condensation |
370 | MISCELLANEOUS |
CROSS-REFERENCE ART COLLECTIONS | ||
950 | PROCESSING OF "FISCHER-TROPSCH" CRUDE |
951 | SOLID FEED TREATMENT WITH A GAS OTHER THAN AIR, HYDROGEN OR STEAM |
952 | SOLID FEED TREATMENT UNDER SUPERCRITICAL CONDITIONS |
FOREIGN ART COLLECTIONS | ||
FOR000 | CLASS-RELATED FOREIGN DOCUMENTS |
DIGESTS | ||
DIG1 | AUTOMATIC CONTROL |
DIG2 | MOLECULAR SIEVE |
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