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Process for preparing at least one low molecular weight aromatic material of value from a lignin-comprising starting material

a technology aromatic materials, which is applied in the field of process for preparing low molecular weight aromatic materials of value from lignin-comprising starting materials, can solve the problems of not teaching the subjecting of lignin-comprising starting materials first to pyrolysis and then directly, and achieve the effect of reducing molecular weigh

Inactive Publication Date: 2011-11-10
BASF AG
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  • Abstract
  • Description
  • Claims
  • Application Information

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Benefits of technology

[0018]It has surprisingly been found that the pyrolysis products obtained in the pyrolysis of lignin-comprising materials can advantageously be subjected to a dealkylation process (or comparable processes to reduce the molecular weight further) without a component being separated off and in particular without preceding condensation with at least partial gas / aromatics separation.

Problems solved by technology

However, this document does not teach subjecting a lignin-comprising starting material firstly to pyrolysis and then directly, essentially without a component being separated off and in particular without condensation, to a dealkylation process with the primary purpose of obtaining low molecular weight aromatic materials of value.

Method used

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  • Process for preparing at least one low molecular weight aromatic material of value from a lignin-comprising starting material

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Embodiment Construction

[0026]For the purposes of the present invention, an aromatics composition having a high content of single-ring aromatics which are unalkylated or have a low degree of alkylation is a composition which, based on its total weight, comprises at least 50% by weight of single-ring aromatics. The total content of unalkylated, unalkoxylated, of at most monohydroxylated and of monoalkylated aromatics is, based on the total weight of the aromatics composition, at least 50% by weight.

[0027]For the purposes of the invention, pyrolysis is a thermal treatment of the lignin-comprising starting material, with molecular oxygen not being introduced or introduced only in a small amount. Here, a small amount is an amount which is significantly smaller than the amount necessary for complete oxidation of the carbon comprised in the lignin-comprising starting material to give CO2. The amount of molecular oxygen introduced in the pyrolysis is preferably at least 50 mol % below, particularly preferably at ...

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Abstract

The present invention relates to a process for preparing low molecular weight aromatic materials of value from a lignin-comprising starting material produced from biomass.

Description

BACKGROUND OF THE INVENTION[0001]The present invention relates to a process for preparing low molecular weight aromatic materials of value from a lignin-comprising starting material produced from biomass.[0002]Aromatic compounds having a low molecular weight and specifically phenolic compounds have found wide use as intermediates and products of value. They serve, for example, as precursor for various resins, surface-active compounds, specialty chemicals, etc. It is known that such compounds can be prepared from lignin-comprising starting materials. However, there continues to be a need for a simple, inexpensive process which makes it possible to provide many different aromatic products for various fields of use.[0003]Subjecting streams from various processes for digesting lignin- or lignocellulose-comprising materials to an after-treatment to obtain materials of value is known.[0004]U.S. Pat. No. 2,057,117 describes a process for preparing vanillin, in which a starting material sel...

Claims

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Application Information

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IPC IPC(8): C10G1/00
CPCC07C4/16C07C4/18C07C4/20C07C15/02
Inventor PROCHAZKA, ROMANBITTERLICH, STEFANMACHHAMMER, OTTODEUERLEIN, STEPHANKLINGLER, DIRKPANTOUFLAS, EMMANOUILKINDLER, ALOISZOELS, BERNDWERTHER, JOACHIMHARTGE, ERNST-ULRICHWANG, PENGSCHULT, BERNHARDRIMOSCHAT, FRANKHEIKO, ROHDE
Owner BASF AG
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