The present invention concerns a process that can be realised continuously for the preparation of anhydrous crystalline lactulose from commercial aqueous syrups that contain it, characterised in that the crystallisation and consequent separation of the high-purity lactulose with high yields from the syrup is triggered by mixing the ore pulp (or recycled ore pulp), obtained …

Legal parties

Inventors (applicants): Giovanni Cipolletti
Assignees (initial): Fresenius Kabi Austria GmbH (Graz-Puntigam, AU)
Agents: Abelman, Frayne & Schwab (attorney)

The application was examined by Stefanie Cohen, Melvin C Mayes (USPTO dept. 1732)


  • 1. A process for continuous preparation of anhydrous crystalline lactulose from an aqueous syrup containing …
  • 2. Process according to claim 1 , wherein the aqueous syrup contains up to 10-30% …
  • 3. The process according to claim 1 , comprising adding said mother liquor to said …

International priority data

EP: 07425720 / Nov. 14, 2007 (regional)

Cited documents


  • EP 0 480 519 A1, Oct. 1, 1991
  • EP 0 622 374 A1, Apr. 1, 1994
  • Carobbi et al. US 4536221 A, Aug. 1, 1985
  • EP 0 318 630 A1, Jan. 1, 1988
  • EP 0 532 173 A3, Aug. 1, 1992
  • WO WO 94/29476 A, Dec. 1, 1994
  • Bimbi US 5480491 A / 127/61, Jan. 1, 1996
  • EP 0 685 486 A1, Jun. 1, 1993


Field of the Invention

This invention concerns an industrial process that can be carried out continuously with high yields, for the preparation of high-purity crystalline lactulose, by crystallisation from aqueous syrups available …

Detailed Description of the Invention

The Applicant has now found, and it is the object of this invention, a new process for the crystallisation of high-purity lactulose from commercial syrups that contain it, which may be industrially …


A) Preparation of the First Triggering Ore Pulp for Starting Up the System To prepare this first suspension purified water and dry lactulose crystal are used, in a proportion of 28-32% …

More details about Continuous Process for the Preparation of Crystalline Lactulose

Miscellaneous patent data

The exemplary claims include number 1, the patent was granted on Aug. 19, 2014, the application number is 12/291,769 (U.S.), the protection scope is defined by 12 claims, the patent extension term is 891 days, the application publication date is Nov. 12, 2008, categorized under Centrifuging as a primary classification, developed by Giovanni Cipolletti, the inventor's first name is Giovanni, and his last name is Cipolletti, the published agent's organization is Abelman, Frayne & Schwab, similar patents are classified under Cutting machines specially adapted for sugar, Treatment of sacchariferous solutions, Continuous processes, Crystallizing or solidifying, ion exclusion, Extraction of sucrose from molasses, Separating and purifying, combined with measuring instruments for effecting control of the process, Diffusion batteries, carbon dioxide or sulfur dioxide, the grant number is 08808458, the invention is titled Continuous Process for the Preparation of Crystalline Lactulose, the assignee classification - a foreign company or corporation, the assignee location is Graz-Puntigam (AU); its organization is Fresenius Kabi Austria GmbH, the patent particularly claims a process for continuous preparation of anhydrous crystalline lactulose…, the published applicant's name is Cipolletti Giovanni, the application was examined by Melvin C Mayes, the assistant Stefanie Cohen (1732 USPTO department).

Invention classification information

The invention is classified under by centrifugal force, Centrifuging.

Patent details
Publication number 08808458
Publication date Aug. 19, 2014
Kind code B2
Application number 12/291,769
Application date Nov. 12, 2008
Application type U
Application series code 12
Extension term 891
National classification 127/56
Total number of claims 12
Exemplary claims 1
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