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US 12,247,096 B2Granted
Processes and production plants for producing polymer polyols
AssigneeCovestro LLC
InventorsRick Adkins, Jack Reese
Life of this patent
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Abstract
Processes for preparing a polymer polyol (PMPO) in which a base polyol is continuously produced in a continuous base polyol reactor, the base polyol is continuously discharged from the continuous base polyol reactor; the base polyol is continuously introduced to a continuous PMPO reactor, which is different from the continuous base polyol reactor, and PMPO is continuously removed from the PMPO reactor. Production plant configured to carry out such processes are also described.
Claims7
A production plant for producing PMPO, comprising:
- a) a continuous base polyol reactor comprising:
- (1) an inlet in fluid communication with a source of alkylene oxide;
- (2) an inlet in fluid communication with a source of starter;
- (3) an inlet in fluid communication with a source of DMC catalyst;
- and
- (4) an outlet configured to continuously discharge a base polyol having a functionality of 2 to 8 and a hydroxyl number of 10 to 1000 mg KOH/g from the base polyol reactor;
- b) a continuous PMPO reactor comprising:
- (1) an inlet in fluid communication with the outlet of the base polyol reactor and configured to continuously receive the base polyol from the base polyol reactor as the base polyol is continuously discharged from the base polyol reactor;
- (2) an inlet in fluid communication with a source of ethylenically unsaturated monomer,
- (3) an inlet in fluid communication with a source of preformed stabilizer;
- (4) an inlet in fluid communication with a source of free radical initiator;
- and
- (5) an outlet configured to continuously discharge PMPO from the PMPO reactor.
10 more elements
Dependencies are inferred from the claim text.