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:
Jul. 23, 2019
Filed:
Jun. 06, 2011
Asko Karppi, Turku, FI;
Veli-matti Vuorenpalo, Espoo, FI;
Leif Robertsen, Parainen, FI;
Kari Parviainen, Espoo, FI;
Olli Dahl, Tervakoski, FI;
Kari Vanhatalo, Helsinki, FI;
Asko Karppi, Turku, FI;
Veli-Matti Vuorenpalo, Espoo, FI;
Leif Robertsen, Parainen, FI;
Kari Parviainen, Espoo, FI;
Olli Dahl, Tervakoski, FI;
Kari Vanhatalo, Helsinki, FI;
Kemira OYJ, Helsinki, FI;
Abstract
The present invention relates to a process for producing microcellulose comprising subjecting fibrous cellulosic material to acid hydrolysis at a temperature from 10° C. to less than 140° C. and at a consistency of at least 8% on dry weight of the cellulose, wherein the amount of added acid is from 0.2 to 2%, preferably from 0.3 to 1.9%, more preferably from 0.5 to 1.5% on dry weight of the cellulose.