Document VJL3oGaKaz20EqYkXNbeXbdM4

"Cotcardb Z-?-fo DOW CHEMICAL U.S.A. <5>%/ *" LOUISIANA RESEARCH & DEVELOPMENT P O, BOX 400 PLAOUEMINE LA 70765 0400 504-3898000 August 8, 1990 Gerald Wagener R&D Bldg. 2503 ANSWERS TO REACTIVE CHEMICAL CONCERNS FOR D0WAN0LS TBH DISTILLATION (1) After the Dowanols mixture and the oleic acid have been mixed in the reactor, the concentration of KOH will be tested to confirm neutralization before initiating the distillation step. (2) _ne oleic acid will be diluted in a 50/50 mixture of Dowanols solution. (3) Redundancy shutdown logic will be used. The control logic will be run off of two thermocouples. (4) In the event of overheating (reactor temperature reaches 190 C), the jacket will go to full cooling. Then after, the reactor temperature has cooled down to 160 c, the nitrogen purge to the system will begin. (5) A second pressure transmitter will be added to the top of the column. Redundancy shutdown logic will be used. (6) A check valve will be installed on VP-30 outlet. (7) As part of the shutdown logic for overheating, the system will go to total reflux. -V VVv -ys Steven Hartman 'H6MICAL COMPANY DO A 016966 CONFTDFNTTAl DOW CHEMICAL U.S.A. August 8, 1990 LOUISIANA RESEARCH & DEVELOPMENT P O BOX 400 PLAQUEMINE. LA 70765-0400 504 389-8000 Steve Hartman R & D Mini-Plant Bldg. 2502 XC: Paul Coram Bldg. 2501 REACTIVE CHEMICALS REVIEW - AUGUST 7, 1990 PROJECT: R&D Mini-Plant Distillation of Dowanol TBH PROJECT REP: Steve Hartman ATTENDEES: John Gross, David Steele, Randy Hebert, Ted Westlake, John Green, Fred Lochary, Paul Coram, Cal Esneault, Gerald Wagener CONCERNS: 1. Perform analytical tests to confirm neutralization of KOH before initiating the distillation step. 2. Since oleic acid is viscous, consider dilution with Dowanol or butanol before addition to RX-26. 3. As a means of obtaining redundancy into RX-26 high temperature shut-down logic, consider incorporating inputs from more than just one thermocouple. 4. In the event that overheating occurs in RX-26, consider lowering the temperature to a pre-determined level by applying full cooling before activating the nitrogen flush. 5. Consider installing a redundant pressure transmitter on RX-26 with either high pressure alarm or shut-down. 6. Check outlet of VP-30 to determine if check valve is installed. 7. Consider incorporating full reflux in the event of an overheating problem in RX-26. Please respond in writing to the committee chairman as to action taken or planned in regard to these considerations. Gerald Wagener Chairman Reactive Chemicals Committee jpb 00 A 016967 CONFTDFNTTAI. DOW CHEMICAL U.S.A. August 8, 1990 LOUISIANA RESEARCH & DEVELOPMENT P O. SOX 400 PLAOUEMINE, LA 70765 0400 504-309-6000 Steve Hartman R & P Mini-Plant Bldg. 2502 XC: Paul Coram Bldg. 2501 REACTIVE CHEMICALS REVIEW - AUGUST 7, 1990 PROJECT: R&D Mini-Plant Distillation of Dowanol TBH PROJECT REP: Steve Hartman ATTENDEES: John Gross, David Steele, Randy Hebert, Ted Westlake, John Green, Fred Lochary, Paul Coram, Cal Esneault, Gerald Wagener CONCERNS: 1. Perform analytical tests to confirm neutralization of KOH before initiating the distillation step. 2. Since oleic acid is viscous, consider dilution with Dowanol or butanol before addition to RX-26. 3. As a means of obtaining redundancy into RX-26 high temperature shut-down logic, consider incorporating inputs from more than just one thermocouple. 4. In the event that overheating occurs in RX-26, consider lowering the temperature to a pre-determined level by applying full cooling before activating the nitrogen flush. 5. Consider installing a redundant pressure transmitter on RX-26 with either high pressure alarm or shut-down. 6. Check outlet of VP-30 to determine if check valve is installed. 7. Consider incorporating full reflux in the event of an overheating problem in RX-26. Please respond in writing to the committee chairman as to action taken or planned in regard to these considerations. Gerald Wagener Chairman Reactive Chemicals Committee jpb r>n : : t N Ca ,'NI ' r "^E :ow chemical COMPANY DO A 016968 CONFIDENTIAL