Dravacel Ltd is company that develops new technologies fore pulp production.
Below you can find links that will guide you to the valid patents.
https://data.epo.org/publication-server/pdf-document?pn=3126567&ki=B1&cc=EP&pd=20180314
https://data.epo.org/publication-server/pdf-document?pn=3443159&ki=B1&cc=EP&pd=20200603