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Lignin conversion process

A technology of lignin and wood, applied in the field of lignin conversion

Active Publication Date: 2014-03-05
碧欧撤曼特克斯有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this method is the presence and use of organic solvents which must then be removed from the product

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0172] I. Preparation of Lignin Feed Stream

[0173] Pre-Treatment of Lignin Stream The feed stream was produced from Arundoshida as the starting lignocellulosic biomass. Lignocellulosic biomass was pretreated according to the following steps:

[0174] - Lignocellulosic biomass was introduced into the continuous reactor and soaked at 155°C for 155min. The steeped mixture is passed through a compressor to separate the steeping liquid containing sugars and the lignocellulosic biomass and the fraction containing solid steeping raw materials. The portion containing the solid soak material was steam exploded at 195°C for 4 min.

[0175] The steam explosion products are separated into steam explosion liquid and steam explosion solid.

[0176] - Mixing the steam explosion solids with water to obtain a mixture with a dry matter content of 7.5% and feeding the mixture into the enzymatic hydrolysis reactor. An enzyme mix was added corresponding to a concentration of 15 mg protein pe...

Embodiment 1

[0206] Example 1 - Need for Lignocellulosic Biomass Pretreatment

[0207] 5.56 g of unpretreated lignocellulosic biomass was reacted in the presence of 10 g water, 6.0 g Johnson Mather A-5000 sponge nickel catalyst (50 wt% water / 50 wt% catalyst). The reactor was pressurized to a hydrogen pressure of 77.5 bar at 25°C. The reaction temperature is 350° C., corresponding to an operating pressure in the range of 170-200 bar; the reaction time is 1.5 h. The reaction product was determined according to method N.1. The resulting reaction product has a large amount of unconverted solids and little or no hydrocarbons. Therefore, the need for preprocessing was identified.

Embodiment 2

[0208] Example 2 - Conversion of a lignin feed stream to a phenolic-rich converted lignin stream

[0209] 5 g of a lignin feed stream at approximately 50% humidity were reacted in the presence of 18.00 g water, 1.20 g Johnson Mather A-5000 sponge nickel catalyst (50 wt% water / 50 wt% catalyst). The reactor was pressurized to a hydrogen pressure of 13.8 bar at 25°C. The reaction temperature was 305° C., corresponding to an operating pressure in the range of 89-93 bar; reaction time 1.0 h.

[0210] The reaction product was determined according to method N.2. The composition of the reaction product is reported in Table 2. Phenolic compounds are the major components of the converted lignin feed stream. A sample curve for this converted lignin stream is Figure 4 shown.

[0211] Table 2. Composition of phenolic-rich converted lignin stream

[0212]

[0213]

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PUM

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Abstract

This specification discloses a complete method to manufacture polyester articles from freshly harvested ligno-cellulosic biomass. The process steps include pretreating the biomass and the converting the lignin to one of several possible organic steams in a one step process by combining the lignin with water, hydrogen, and an elemental metal catalyst such as Raney Nickel at the specificied temperature and pressures to produce very specific products, separating the organics, and then processing the organics into polyester feedstocks and converting those feedstocks to polyester.

Description

[0001] Priority and cross-references [0002] This patent application claims priority to US Provisional Application 61498221, filed June 17, 2011. Background technique [0003] There has been a long history of attempts to convert the lignin of ligno-cellulosic (lignocellulosic) biomass into useful components. These methods can be roughly divided into three categories. [0004] The first type is the organic solvent method, which extracts the lignin with an organic solvent and then treats the extracted lignin. A disadvantage of this method is the presence and use of organic solvents which must then be removed from the product. [0005] The second category is various processing methods of kraft lignin. Kraft lignin is extracted from lignocellulosic biomass using acids and bases, so excess acids and bases need to be removed and neutralized. [0006] The third category is alkali depolymerization of lignin, again attacking said lignin leaving alkali as a pollutant to be treated....

Claims

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Application Information

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IPC IPC(8): C08G63/183C08L97/00C10G1/06C10G1/08D21C3/00
CPCC08G63/78C10G2300/1014D21C3/00C10G1/086C10G1/06Y02E50/32C07C29/156D21C3/003C08G63/183C10G2300/805C08H6/00C07C1/22C10G1/065C10G1/083Y02P30/20C10G3/45C10G3/50Y02E50/30C07C37/06
Inventor 阿龙·默里史蒂文·里巴
Owner 碧欧撤曼特克斯有限公司
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