Invention Grant
- Patent Title: Purification process for partly-hydrolyzed cellulose
- Patent Title (中): 部分水解纤维素的净化过程
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Application No.: US14422619Application Date: 2012-08-21
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Publication No.: US09567707B2Publication Date: 2017-02-14
- Inventor: James M. Lockhart
- Applicant: James M. Lockhart
- Applicant Address: CA Vancouver, BC
- Assignee: NORAM Engineering and Constructors Ltd.
- Current Assignee: NORAM Engineering and Constructors Ltd.
- Current Assignee Address: CA Vancouver, BC
- Agency: Walter | Haverfield LLP
- Agent D. Peter Hochberg; Sean F. Mellino
- International Application: PCT/CA2012/050575 WO 20120821
- International Announcement: WO2014/029001 WO 20140227
- Main IPC: C08B15/02
- IPC: C08B15/02 ; C08B1/00 ; C08L1/04 ; A61K31/717 ; D21H11/04 ; D21C11/00 ; D21C3/02 ; D21C3/04
Abstract:
A method of recovering purified partly-hydrolyzed cellulose (36) from a composition (14) comprising partly-hydrolyzed cellulose and an acid, such as sulfuric acid. A base (28) having a cation that forms a precipitate with the anion of the acid is added to the composition. For example, a base such as barium hydroxide is added to form a sulfate precipitate. The precipitate (38) is then separated from the partly-hydrolyzed cellulose (36), thus reducing its acid content. The method may include additional steps of centrifugation (18) of the composition, breaking-up agglomerations (44) in the composition after precipitation, and dialysis (42).
Public/Granted literature
- US20150233056A1 PURIFICATION PROCESS FOR PARTLY-HYDROLYZED CELLULOSE Public/Granted day:2015-08-20
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