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:
Apr. 24, 2018
Filed:
Jun. 25, 2013
Applicant:
Beijing Insight Biomass Llc, Beijing, CN;
Inventors:
Yingwu Yin, Beijing, CN;
Peng Wan, Beijing, CN;
Honggui Yu, Beijing, CN;
Yujuan Zhang, Beijing, CN;
Xiangxiang Sun, Beijing, CN;
Lingyan Zhang, Beijing, CN;
Assignee:
Beijing Insight Biomass LLC, Beijing, CN;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
D21C 3/02 (2006.01); D21H 17/66 (2006.01);
U.S. Cl.
CPC ...
D21H 17/66 (2013.01); D21C 3/02 (2013.01);
Abstract
The present invention provides a pulping method. Caustic soda is replaced with cheap lime to manufacture pulp in high efficiency, and meanwhile complexation, flocculation and acid-base neutralization of aluminum sulfate are further utilized, so as to recycle effective ingredients in a black liquid, achieve a yield approximate to a mechanical pulp yield, obtain quality of the chemical pulp, implement cyclic utilization of the black liquid and solve the pollution thereof.