Method for the integrated production of cellulose and low-molecular-weight reusable materials
AssigneeBASF SE
InventorsOtto Machhammer, Jochem Henkelmann, Wolfgang Rohde, Mario Emmeluth, Sonja Giesa
Life of this patent
Estimating the term…
Abstract
The present invention relates to an integrated method for producing cellulose and at least one low-molecular-weight reusable material, in which a starting material containing lignocellulose is provided and subjected to a decomposition with a processing medium. A fraction enriched with cellulose and a fraction depleted of cellulose is then isolated from the decomposition material, the depleted fraction of cellulose being subjected to a treatment during which at least one low-molecular-weight reusable material is obtained.
Claims35
An integrated process for producing pulp and at least one low molecular weight material of value, the process comprising:
- a) digesting a lignocellulose-comprising starting material with a treatment medium;
- b) isolating a cellulose-enriched fraction and at least one cellulose-depleted fraction from the digested material, with the at least one cellulose-depleted fraction comprising at least part of the treatment medium from the digesting a);
- c) depolymerizing the at least one cellulose-depleted fraction, to give a treatment product comprising the at least one low molecular weight material of value;
- and
- e) isolating the at least one material of value from the treatment product obtained in c).
An integrated process for producing pulp and an aromatic composition, the process comprising:
- a) digesting a lignocellulose-comprising starting material with a treatment medium, to obtain digested material;
- b) isolating a cellulose-enriched fraction and a lignin-enriched fraction from the digested material, with the lignin-enriched fraction comprising at least part of the treatment medium from the digesting a);
- c) depolymerizing the lignin-enriched fraction, to obtain a depolymerization product;
- and
- d) isolating an aromatics composition from the depolymerization product obtained in the depolymerizing c).
An integrated process for producing pulp and an aromatics composition, the process comprising:
- a) digesting a lignocellulose-comprising starting material with a treatment medium, to obtain a digested material;
- b) isolating a cellulose-enriched fraction and a lignin-enriched fraction from the digested material, with the lignin-enriched fraction comprising at least part of the treatment medium from a);
- c) depolymerizing the lignin-enriched fraction to obtain a depolymerization product;
- d) isolating an aromatics composition by extraction from the depolymerization product obtained in c),
- e) optionally, subjecting the aromatics composition isolated in d) to at least one selected from the group consisting of a fractionation and a subsequent reaction;
- f) isolating an aromatics-depleted residue in d) from the depolymerization product, to obtain an isolated aromatics-depleted residue, and further processing the isolated aromatics-depleted residue, to give at least one component which is comprised in the treatment medium employed in the digesting a), and
- g) recirculating the component of the treatment medium obtained in f) to the digesting a).
Dependencies are inferred from the claim text.