DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS (cracking oils C10G; underground gasification of minerals E21B43/295)

Introduced: September 1968

Description

C10B covers the thermal decomposition of carbonaceous materials (coal, wood, oil shale, lignite, and similar substances) in the absence of air to produce coke, coal tar, coal gas, and other by-products. This class encompasses apparatus, processes, and control methods for dry distillation, including retort design, heating systems, gas recovery, and condensation of volatile products. It excludes petroleum refining and cracking processes (C10G) as well as the purification of gases already produced (C10L), focusing instead on the primary destructive distillation step itself.

Title

Titles differ between systems:

IPC: DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS

CPC: DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS (cracking oils C10G; underground gasification of minerals E21B43/295)

Full Title

Full titles differ between systems:

IPC:

DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS

CPC:

DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS (cracking oils C10G; underground gasification of minerals E21B43/295)

Additional Content IPC

Glossary

Destructive distillation The process of pyrolysis conducted in a distillation apparatus to allow the volatile products to be collected. An example is tar making from pinewood slices (which are rich in terpenes), which are heated in an airless container causing the material to decompose, leaving charcoal and turpentine as by-products. Coke A solid, high in carbon content, and structurally in the non-graphitic state, derived from the pyrolysis of organic material (especially low-ash, low-sulphur bituminous coal) which has passed, at least in part, through a liquid or liquid-crystalline state during the carbonization process. The volatile constituents of the coal (including water, coal gas and coal-tar) are driven off by baking in an airless oven at temperatures as high as 2000 degrees C. Coking The transformation of coal or heavy oil into coke. Carbonisation The conversion of an organic substance into carbon or a carbon-containing residue through pyrolysis or destructive distillation. Pyrolysis The chemical decomposition of organic materials by heating in the absence of oxygen or any other reagents, except possibly steam.

Limiting references

Cracking oils Underground gasification of minerals

Application references

Recovery or working-up of waste materials of organic macromolecular compounds or compositions based thereon by dry heat-treatment to obtain partially depolymerised materials Working up tar, pitch, asphalt or bitumen by techniques including distillation and/or heat-treatment; production of pyroligneous acid Wet carbonising of peat

IPC and CPC are identically structured here. All 29 subcodes exist in both systems.

5 shared codes have differing titles between IPC and CPC.

Child Classifications

Navigate with arrow keys, Enter to open

C10B 1/00 Retorts IPC+CPC Available in IPC and CPC
C10B 11/00 Coke ovens with inclined chambers IPC+CPC Available in IPC and CPC
C10B 13/00 Coke ovens with means for bringing and keeping the charge under mechanical pressure IPC+CPC Available in IPC and CPC
C10B 15/00 Other coke ovens IPC+CPC Available in IPC and CPC
C10B 17/00 Preheating of coke ovens IPC+CPC Available in IPC and CPC
C10B 19/00 Heating of coke ovens by electrical means IPC+CPC Available in IPC and CPC
C10B 21/00 Heating of coke ovens with combustible gases IPC+CPC Available in IPC and CPC
C10B 23/00 Other methods of heating coke ovens IPC+CPC Available in IPC and CPC
C10B 25/00 Doors or closures for coke ovens IPC+CPC Available in IPC and CPC
C10B 27/00 Arrangements for withdrawal of the distillation gases IPC+CPC Available in IPC and CPC
C10B 29/00 Other details of coke ovens IPC+CPC Available in IPC and CPC
C10B 3/00 Coke ovens with vertical chambers IPC+CPC Available in IPC and CPC
C10B 31/00 Charging devices IPC+CPC Available in IPC and CPC
C10B 33/00 Discharging devices; Coke guides +2 CPC IPC+CPC Available in IPC and CPC
C10B 35/00 Combined charging and discharging devices IPC+CPC Available in IPC and CPC
C10B 37/00 Mechanical treatments of coal charges in the oven IPC+CPC Available in IPC and CPC
C10B 39/00 Cooling or quenching coke IPC+CPC Available in IPC and CPC
C10B 41/00 Safety devices, e.g. signalling or controlling devices for use in the discharge of coke +1 CPC IPC+CPC Available in IPC and CPC
C10B 43/00 Preventing or removing incrustations IPC+CPC Available in IPC and CPC
C10B 45/00 Other details +1 CPC IPC+CPC Available in IPC and CPC

Top Applicants

Top Applicants (IPC)

Class C10,2013–2023, worldwide · Source: EPO PATSTAT

SINOPEC (CHINA PETROCHEMICAL CORPORATION) 8,875
SAUDI ARABIAN OIL COMPANY SA 2,245
PETROCHINA COMPANY 2,028
EXXONMOBIL RESEARCH AND ENGINEERING COMPANY US 1,980
IFPEN (IFP ENERGIES NOUVELLES) FR 1,963
SHELL INTERNATIONALE RESEARCH MAATSCHAPPIJ NL 1,878
CHINESE ACADEMY OF SCIENCES 1,829
UNIVERSAL OIL PRODUCTS COMPANY (UOP) US 1,787
LUBRIZOL CORPORATION US 1,277
BASF (BADISCHE ANILIN & SODA FABRIK) DE 1,268

Top Applicants (CPC)

Class C10,2013–2023, worldwide · Source: EPO PATSTAT

SINOPEC (CHINA PETROCHEMICAL CORPORATION) 5,831
SAUDI ARABIAN OIL COMPANY SA 2,918
IFPEN (IFP ENERGIES NOUVELLES) FR 2,305
EXXONMOBIL RESEARCH AND ENGINEERING COMPANY US 2,282
UNIVERSAL OIL PRODUCTS COMPANY (UOP) US 2,268
SHELL INTERNATIONALE RESEARCH MAATSCHAPPIJ NL 2,124
BASF (BADISCHE ANILIN & SODA FABRIK) DE 1,487
CHEVRON CORPORATION US 1,400
PETROCHINA COMPANY 1,372
LUBRIZOL CORPORATION US 1,324