The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 17, 2013
Filed:
Jun. 02, 2010
Baoyi Yang, Hebei, CN;
Binghua Wu, Zhejiang, CN;
Huaiyuan Xu, Jiangxi, CN;
Zhengxue Zhu, Zhejiang, CN;
Yubin Shen, Zhejiang, CN;
Xuegang Wang, Zhejiang, CN;
Liqiang Yang, Zhejiang, CN;
Jialiang Wang, Zhejiang, CN;
Wenhui Jiang, Wulanchabu, CN;
Shengqiang Bao, Zhejiang, CN;
Xiaolin Sheng, Zhejiang, CN;
Xiaoqin Shen, Jilin, CN;
Baoyi Yang, Hebei, CN;
Binghua Wu, Zhejiang, CN;
Huaiyuan Xu, Jiangxi, CN;
Zhengxue Zhu, Zhejiang, CN;
Yubin Shen, Zhejiang, CN;
Xuegang Wang, Zhejiang, CN;
Liqiang Yang, Zhejiang, CN;
Jialiang Wang, Zhejiang, CN;
Wenhui Jiang, Wulanchabu, CN;
Shengqiang Bao, Zhejiang, CN;
Xiaolin Sheng, Zhejiang, CN;
Xiaoqin Shen, Jilin, CN;
Zhejiang DSM Zhongken Biotechnology Co., Ltd., Zhejiang, CN;
Abstract
The present invention relates to a post extraction process for preparing low acyl gellan, comprising the steps: deacylation treatment of gellan gum-containing fermentation broth, enzyme treatment, flocculation of low acyl gellan gum with divalent or polyvalent metal cations, clarification treatment of gellan gum solution, dehydration treatment of gellan gum solution, removal of divalent or polyvalent cations and decoloration, and drying and milling. Preferably, the process comprises the step of formulating a proper amount of chelating agent/acid system before the drying and milling step to chelate the added additional divalent cations added during the use of gellan gum, and at the same time to keep the pH value in a relatively stable condition. The present invention also provides the various low acyl gellan gums prepared by the above methods. The product has the following characteristics: a good appearance, a high transmittancy, and high gel strength. In particular, the chromaticity of the product is above 83%, the transmittancy is above 85%, and the gel strength is above 400 g/cm2.