Patents by Inventor CAIFANG F. YIN

CAIFANG F. YIN has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • BCTMP filtrate recycling system and method
    Patent number: 8999114
    Abstract: A process for making bleached pulp comprises contacting an unbleached pulp mixture with a first recycled filtrate obtained from a first location (3) of a first recycled filtrate loop, to obtain a first pulp mixture having a first consistency; bleaching the first pulp mixture, to obtain a first bleached pulp mixture; pressing or dewatering the first bleached pulp mixture, to obtain a first pressed bleached pulp mixture and a second filtrate; sending at least a portion of the second filtrate to a second location (5) of the first recycled filtrate loop, wherein the second location (5) is downstream of and in fluid communication with the first location (3); contacting the first pressed bleached pulp mixture with a second recycled filtrate obtained from a third location (6) of the first recycled filtrate loop, to obtain a second pulp mixture having a second consistency, wherein the second consistency is greater than the first consistency, and wherein the third location (6) is downstream of and in fluid communicati
    Type: Grant
    Filed: February 28, 2014
    Date of Patent: April 7, 2015
    Assignee: International Paper Company
    Inventor: Caifang F. Yin
  • BCTMP Filtrate Recycling System and Method
    Publication number: 20140174679
    Abstract: A process for making bleached pulp comprises contacting an unbleached pulp mixture with a first recycled filtrate obtained from a first location (3) of a first recycled filtrate loop, to obtain a first pulp mixture having a first consistency; bleaching the first pulp mixture, to obtain a first bleached pulp mixture; pressing or dewatering the first bleached pulp mixture, to obtain a first pressed bleached pulp mixture and a second filtrate; sending at least a portion of the second filtrate to a second location (5) of the first recycled filtrate loop, wherein the second location (5) is downstream of and in fluid communication with the first location (3); contacting the first pressed bleached pulp mixture with a second recycled filtrate obtained from a third location (6) of the first recycled filtrate loop, to obtain a second pulp mixture having a second consistency, wherein the second consistency is greater than the first consistency, and wherein the third location (6) is downstream of and in fluid communicati
    Type: Application
    Filed: February 28, 2014
    Publication date: June 26, 2014
    Applicant: INTERNATIONAL PAPER COMPANY
    Inventor: CAIFANG F. YIN
  • BCTMP filtrate recycling system and method
    Patent number: 8753477
    Abstract: A process for making bleached pulp comprises contacting an unbleached pulp mixture with a first recycled filtrate obtained from a first location of a first recycled filtrate loop, to obtain a first pulp mixture having a first consistency; bleaching the pulp mixture, to obtain a first bleached pulp mixture; pressing or dewatering the bleached pulp mixture, to obtain a first pressed bleached pulp mixture and a second filtrate; sending a portion of the second filtrate to a second location of the first recycled filtrate loop, wherein the second location is downstream of and in fluid communication with the first location; contacting the pressed bleached pulp mixture with a second recycled filtrate obtained from a third location of the first recycled filtrate loop, to obtain a second pulp mixture having a second consistency, wherein the second consistency is greater than the first consistency, and wherein the third location is downstream of and in fluid communication with the second location; bleaching the second p
    Type: Grant
    Filed: March 18, 2011
    Date of Patent: June 17, 2014
    Assignee: International Paper Company
    Inventor: Caifang F. Yin
  • BCTMP Filtrate Recycling System and Method
    Publication number: 20110232853
    Abstract: A process for making bleached pulp comprises contacting an unbleached pulp mixture with a first recycled filtrate obtained from a first location (3) of a first recycled filtrate loop, to obtain a first pulp mixture having a first consistency; bleaching the first pulp mixture, to obtain a first bleached pulp mixture; pressing or dewatering the first bleached pulp mixture, to obtain a first pressed bleached pulp mixture and a second filtrate; sending at least a portion of the second filtrate to a second location (5) of the first recycled filtrate loop, wherein the second location (5) is downstream of and in fluid communication with the first location (3); contacting the first pressed bleached pulp mixture with a second recycled filtrate obtained from a third location (6) of the first recycled filtrate loop, to obtain a second pulp mixture having a second consistency, wherein the second consistency is greater than the first consistency, and wherein the third location (6) is downstream of and in fluid communicati
    Type: Application
    Filed: March 18, 2011
    Publication date: September 29, 2011
    Applicant: INTERNATIONAL PAPER COMPANY
    Inventor: CAIFANG F. YIN