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US 7,772,376 B2Granted
Manufacturing process
AssigneeFujifilm Imaging Colorants Limited
InventorsDavid Martin Payne, Douglas John Edwin Spencer, John Heathcote Atherton, Zachary Richard Meadows
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Abstract
A process for the preparation of a desired chemical compound in a continuous reactor in which a part of the product stream exits the reactor and part of the product stream is recycled around the reactor in order to reduce the amount of buffer that would otherwise be required.
Claims13
A process for the preparation of a desired chemical compound in a continuous reactor which comprises the following stages:
- (i) mixing together in a reaction zone of the reactor at a pH within a desired pH range a first stream comprising a first compound and a second stream comprising a second compound capable of reacting with the first compound such that a product stream containing the desired chemical compound is formed;
- (ii) removing part of the product stream from the reactor, leaving part of the product stream in the reactor;
- and
- (iii) recirculating the product stream remaining in the reactor from stage (ii) into the reaction zone thereby assisting maintenance of the desired pH range during a subsequent performance of stage (i).
1 more element
Dependencies are inferred from the claim text.