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Catalyst for degrading lignin, catalyst for degrading aromatic hydrocarbon, and porphyrin

A technology of lignin and catalyst, applied in physical/chemical process catalyst, organic compound/hydride/coordination complex catalyst, organic chemistry, etc.

Active Publication Date: 2011-07-20
福留裕文
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this conventional technique does not include any disclosure involving the use of any basic compound and any photocatalyst

Method used

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  • Catalyst for degrading lignin, catalyst for degrading aromatic hydrocarbon, and porphyrin
  • Catalyst for degrading lignin, catalyst for degrading aromatic hydrocarbon, and porphyrin
  • Catalyst for degrading lignin, catalyst for degrading aromatic hydrocarbon, and porphyrin

Examples

Experimental program
Comparison scheme
Effect test

preparation example 1

[0099] As described above, alcohols and organic acids can be produced by adding porphyrin (pyrrole compound) to lignin as a lignin decomposition catalyst, and further decomposition products can be obtained by photolysis of lignin, and the lignin released from lignin can also be separated. Hydrogen ion. Furthermore, tetrapyrrole compounds and synthesized porphyrins each having a porphyrin structure are effective as catalysts for decomposing aromatic hydrocarbons such as dioxins. In this case, the porphyrin usable herein may be, for example, a porphyrin biologically produced using Escherichia coli. In this Preparation Example, the preparation of the pyrrole compound using Escherichia coli will be described.

[0100] Cells (JD23504 obtained from National Biological-Resources) that had been inserted with the transposon-derived transposon of Escherichia coli were cultured at 37° C. in 2 ml of LB medium (bacteria-tryptone: 1 %; bacteria-yeast extract: 0.5%; NaCl: 0.5%) for 12 hour...

Embodiment 1

[0156] In this example, the lignin used was a high-purity product (obtained from Sigma, Cat. No. 471003 with a molecular weight of 60,000) without any impurities such as reducing sugars and cellulose. 1 ml of a solution containing 2.5 mg / ml of this lignin, 0.05 M KOH and 50 μg / ml of the porphyrin with 4 carboxyl groups in the molecule prepared in the aforementioned Preparation Example 1 was introduced into an Eppendorf polypropylene tube almost similar to A light-transmitting cylindrical tube, and the contents of the tube were irradiated for 12 hours with UV light emitted by a UV lamp of the ENF type obtained from the company SPECTRONICS. Then, the tube was heated to 80° C. for 60 minutes, and the gas evaporated from the tube contents was analyzed using a GC / MS QP-2010 from Shimadzu Corporation equipped with a column DB-WAX, and detected 170 μg / ml of methanol. At this time, 140 μg / ml of formic acid, 25 μg / ml of malic acid, 19 μg / ml of acetic acid, 5.4 μg / ml of succinic acid, a...

Embodiment 2

[0161] The lignin used in this example is a high-purity product (obtained from Sigma, Cat. No. 471003, molecular weight: 60,000) without any impurities (such as reducing sugar and cellulose). 1 ml of this lignin containing 2.5 mg / ml, 0.05 M KOH and, as synthetic porphyrin, 50 μg / mL protoporphyrin IX (obtained from ALDRICH company) with 2 carboxyl groups in each molecule and A solution of uroporphyrin I with 8 carboxyl groups (from Sigma) or coproporphyrin I with 4 carboxyl groups in the molecule (from ALDRICH) was introduced into a cylinder with light transmission almost similar to Eppendorf polypropylene tubes shaped tubes, and the contents of the tubes were irradiated for 12 hours with UV light emitted by an ENF type UV lamp obtained from the company SPECTRONICS. Then, the reaction liquid thus obtained was heated to 80° C. for 60 minutes, and the gas evaporated from the contents of the tube was analyzed using GC / MSQP-2010 equipped with column DB-WAX obtained from Shimadzu Co...

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Abstract

The present invention provides a catalyst for degrading lignin and a catalyst for degrading an aromatic hydrocarbon, each of which contains a porphyrin. A solution containing an alkali compound is added to lignin, a catalyst for degrading lignin is allowed to act on the resulting lignin-alkali compound solution as needed, which is irradiated with light as needed, or a catalyst for degrading lignin is allowed to act on lignin as needed, which is irradiated with light, whereby alcohols and organic acids are separated. A degradation product generated when the alcohols and organic acids are separated is recovered, and also hydrogen ions are released. The present invention also provides a porphyrin having a catalytic function of converting lignin into alcohols and organic acids, a porphyrin having a catalytic function of degrading a compound containing an aromatic hydrocarbon in which an oxygen atom is bound to carbon which forms a benzene ring, and a porphyrin obtained by culturing Escherichia coli that cannot express a gene ypjD (b2611) due to mutation.

Description

【Technical field】 [0001] The present invention relates to catalysts for the decomposition of lignin, methods for the preparation of alcohols and organic acids, methods for the preparation of lignin decomposition products, catalysts for the decomposition of aromatic hydrocarbons, methods for releasing hydrogen ions, and porphyrins; and more particularly to Lignin decomposition catalyst including porphyrin, method for producing alcohol (such as methanol) and organic acid starting from lignin, method for producing lignin decomposition product, aromatic hydrocarbon decomposition catalyst including porphyrin, using lignin including porphyrin A method of decomposing a catalyst to release hydrogen ions from lignin, and porphyrin. 【Background technique】 [0002] Global warming has gradually become serious since the beginning of the 21st century, and reducing the emission of carbon dioxide has become the key to controlling the industry and, furthermore, the world economy. Due to the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/02C07C27/00C07C29/00C07C31/04C07C51/00C07C53/02C07D487/22C12P7/04C07B61/00
CPCC07D487/22C12P17/182Y02E50/10B01J31/02C07C37/54C12P17/10
Inventor 石桥彻
Owner 福留裕文
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