Control system for a furfural refining unit receiving heavy sweet charge oil
A control system is described for a furfural refining unit receiving heavy sweet charge oil and furfural solvent, one of which is maintained at a fixed rate while the flow rate of the other is controlled by the control system, wherein the system treats the received heavy sweet charge oil with the received furfural to yield extract mix and raffinate, comprising gravity analyzer means for sampling the heavy sweet charge oil and providing a signal API corresponding to the API gravity of the heavy sweet charge oil, flash point analyzer means for sampling the heavy sweet charge oil and providing a signal FL corresponding to the flash point temperature of the heavy sweet charge oil, viscosity analyzer means for sampling the heavy sweet charge oil and providing signals KV/sub 150/ and KV/sub 210/ corresponding to the kinematic viscosities, corrected to 150 and 210/sup 0/F, respectively, sulfur analyzer means for sampling the heavy sweet charge oil and providing a signal S corresponding to the sulfur content of the heavy sweet charge oil, flow rate sensing means for sensing the flow rates of the heavy sweet charge oil and of the furfural and providing signals chg and solv, corresponding to the charge oil flow rate and the furfural flow rate, respectively, temperature sensing means sensing the temperature of the extract mix and providing a corresponding signal t, and control means connected to all of the analyzer means, and to all the sensing means for controlling the other flow rate of the heavy sweet charge oil and the furfural flow rates in accordance with signals API, FL, KV/sub 150/, KV/sub 210/, S, T, CHG and SOLV; wherein said control means includes VI signal means connected to the viscosity analyzer means for providing a signal VI corresponding to the viscosity index of the heavy sweet charge oil in accordance with the kinematic viscosity signals KV/sub 150/, KV/sub 210/ and SUS/sub 210/.
- Assignee:
- Texaco Inc
- Patent Number(s):
- US 4212070
- OSTI ID:
- 5078320
- Resource Relation:
- Patent File Date: Filed date 5 Jun 1978
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
FURFURAL
SOLVENT PROPERTIES
PETROLEUM REFINERIES
CONTROL SYSTEMS
FLOW REGULATORS
FLASH HEATING
OILS
RECOVERY
RECYCLING
TEMPERATURE MONITORING
ALDEHYDES
CONTROL EQUIPMENT
EQUIPMENT
FURANS
HEATING
HETEROCYCLIC COMPOUNDS
INDUSTRIAL PLANTS
MONITORING
ORGANIC COMPOUNDS
ORGANIC OXYGEN COMPOUNDS
OTHER ORGANIC COMPOUNDS
020400* - Petroleum- Processing