PATENT CLAIM ANALYSIS

Application Number: 16397702
Application Type: Utility
Filing Date: 2019-04
Publication Date: 2019-08
Patent Classification: ["423", "580100"]

Abstract:
The present invention relates to a process for the reduction of pitch in an aqueous medium generated in a papermaking or pulping process, comprising the following steps: a) providing an aqueous medium comprising pitch generated in a papermaking or pulping process; b) providing a ground calcium carbonate and/or a precipitated calcium carbonate; c) providing a hydrophobising agent selected from an aliphatic carboxylic acid having between 5 and 24 carbon atoms; d) contacting the ground calcium carbonate and/or the precipitated calcium carbonate of step b) with the hydrophobising agent of step c) for obtaining a hydrophobised ground calcium carbonate and/or a hydrophobised precipitated calcium carbonate; and e) contacting the aqueous medium provided in step a) with the hydrophobised ground calcium carbonate and/or the hydrophobised precipitated calcium carbonate obtained in step d), to the use of a hydrophobised ground calcium carbonate and/or a hydrophobised ground calcium carbonate for reducing the amount of pitch in an aqueous medium as well as to a hydrophobised ground calcium carbonate and/or a hydrophobised ground calcium carbonate and a composite of hydrophobised ground calcium carbonate and/or hydrophobised ground calcium carbonate and pitch.

Claim (Index 15):
A composite comprising hydrophobised ground calcium carbonate and/or the hydrophobised precipitated calcium carbonate and adsorbed pitch, that is obtained by a process comprising the following steps:\n a) providing an aqueous medium comprising pitch from paper pulp, wherein the pitch is natural resin from the paper pulp, wherein the paper pulp is selected from the group consisting of mechanical pulp, ground wood, TMP (thermo mechanical pulp), chemithermomechanical pulp (CTMP), chemical pulp, and kraft or sulphate pulp, and wherein the pulp is not recycled pulp; b) contacting the aqueous medium provided in step a) with calcium carbonate consisting of a partially hydrophobised ground calcium carbonate and/or partially hydrophobised precipitated calcium carbonate so that the calcium carbonate adsorbs pitch in the aqueous medium to form a composite comprising the hydrophobised ground calcium carbonate and/or the hydrophobised precipitated calcium carbonate and adsorbed pitch, wherein the aqueous medium is contacted with 0.05 to 20 wt.-% of the partially hydrophobised ground calcium carbonate and/or the partially hydrophobised precipitated calcium carbonate, based on the total weight of the aqueous medium, wherein the adsorbed pitch is natural resin from the paper pulp, and wherein the partially hydrophobised ground calcium carbonate and/or a partially hydrophobised precipitated calcium carbonate is ground calcium carbonate and/or precipitated calcium carbonate that has been mixed with a hydrophobising agent selected from the group consisting of one or more aliphatic carboxylic acids having between 5 and 24 carbon atoms at a temperature of at least 50\u00b0 C. such that the hydrophobising agent is in a liquid or molten state and less than 20% of the specific surface area of the ground calcium carbonate and/or the precipitated calcium carbonate is covered by a coating consisting of the hydrophobising agent and reaction products thereof; and c) separating the composite comprising the hydrophobised ground calcium carbonate and/or the hydrophobised precipitated calcium carbonate and adsorbed pitch from the aqueous medium.

Metadata:
- Claim Count in Document: 29.0
- Percentile: 100.0
- Lexical Diversity: 3.10769
- Patent Class: 423.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: True
- Related Applications: ['14127725', '15129524', '12449911', '13068168', '14284585']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.7838223639047573
- 35 USC 102 Novelty (BERT): 0.6437872204026812
- Combined Prediction Score: 0.7698188495545497
- Mean Citation Score: 386.934274
- Max Citation Score: 639.9074
- Similarity Product: 573.1920863122582

Labels:
- Claim Label 101: 1
- Claim Label 102: 1
- Claim Label 103: 1
- Claim Label 112: 1
- Combined Label: 1
- Label 101 Adjusted: 1

Dataset: test