| (19) |
 |
|
(11) |
EP 0 113 592 A3 |
| (12) |
EUROPEAN PATENT APPLICATION |
| (88) |
Date of publication A3: |
|
16.01.1985 Bulletin 1985/03 |
| (43) |
Date of publication A2: |
|
18.07.1984 Bulletin 1984/29 |
| (22) |
Date of filing: 29.12.1983 |
|
|
| (84) |
Designated Contracting States: |
|
AT BE CH DE FR GB IT LI NL SE |
| (30) |
Priority: |
29.12.1982 US 454188
|
| (71) |
Applicant: UNION SUGAR COMPANY |
|
() |
|
| (72) |
Inventors: |
|
- Chadwick, Thomas Carl
()
- Voit, David Edward
()
|
|
| |
|
| (54) |
Improved method of recovering sucrose |
(57) (D An improved method of recovering sucrose from plant- derived aqueous solutions
is provided. The method comprises contacting an aqueous sucrose-containing solution
derived from plant juice, such as sugar cane or sugar beet juice, with aliphatic carboxylic
acid having an average carbon chain length of about 2-6, in a concentration sufficient
to selectively precipitate a substantial amount of sucrose from the solution. The
precipitate is then separated and recovered and the depleted solution can be recycled.
Preferably the sucrose-containing solution is concentrated to about 55-96 Brix before
the contacting and the contacting is carried out by rapidly adding the sucrose-containing
solution to the acid in order to assure rapid growth of large sucrose crystals for
maximum sucrose recovery. The sucrose-containing solution before concentrating can
be any solution obtained prior to molasses formation; e.g. untreated diffusion juice,
prelimed and/or predefecated diffusion juice, purified diffusion juice or even a solution
formed by reconstituting from raw recovered sugar; alternatively, it can be a solution
after molasses formation, in which event the selected acid, if it includes acetic
acid, only includes it in a mixture with other aliphatic carboxylic acids. It may
also be waste fluid from a canning operation or the like.
