scholarly journals Catalytic Oxidation of Lignins into the Aromatic Aldehydes: General Process Trends and Development Prospects

2017 ◽  
Vol 18 (11) ◽  
pp. 2421 ◽  
Author(s):  
Valery Tarabanko ◽  
Nikolay Tarabanko
Keyword(s):  
Catalytic Oxidation ◽  
Aromatic Aldehydes ◽  
General Process ◽  
Process Trends ◽  
Development Prospects

Selective Production of Aromatic Aldehydes from Lignin by Metalloporphyrins/H2O2 System

2013 ◽  
Vol 805-806 ◽  
pp. 273-276 ◽  
Author(s):  
Yan Li ◽  
Jie Chang ◽  
Yong Ouyang
Keyword(s):  
Hydrogen Peroxide ◽  
Nmr Spectroscopy ◽  
Catalytic Oxidation ◽  
Value Added ◽  
Aromatic Aldehydes ◽  
Alkaline Condition ◽  
H Nmr ◽  
Biomimetic Catalyst ◽  
Ft Ir ◽  
Ft Ir Spectroscopy

In this work, a promising method for production of high value-added aromatic aldehydes from lignin was proposed. The concept is based on the use of metalloporphyin as catalyst and hydrogen peroxide as oxidant under alkaline condition. The biomimetic catalyst Co (TPPS4) (TPPS4=meso-tetra (p-sulphonatophenyl) porphyrin) was prepared and characterized by1H-NMR spectroscopy, FT-IR spectroscopy and UVvisible spectroscopy. It exhibited high activity in the catalytic oxidation of lignin. The main products were p-hydroxybenzaldehyde, vanillin, and syringaldehyde from catalytic oxidation of lignin, which in total were up to 75.09% of the identified compounds by GC-MS. The yield of the three aromatic aldehydes was 12.84 wt.%, compared to a poor 2.63 wt.% yield of the three aromatic aldehydes without Co (TPPS4).

Catalytic oxidation of lignin–acetoderivatives: a potential new recovery route for value-added aromatic aldehydes from acetoderivatives

2015 ◽  
Vol 5 (7) ◽  
pp. 3746-3753 ◽  
Author(s):  
Kissa R. Alunga ◽  
Yue-Yuan Ye ◽  
Shui-Rong Li ◽  
Duo Wang ◽  
Yun-Quan Liu
Keyword(s):  
Catalytic Oxidation ◽  
Value Added ◽  
Aromatic Aldehydes ◽  
Lignin Oxidation ◽  
By Products

Lignin oxidation by-products (acetoderivatives) were oxidized to aromatic aldehydes with the help of CuSO4·5H2O as a catalyst.

Preparation of Aromatic Aldehydes from Lignin Oxidation with a Perovskite-Type Catalyst

2011 ◽  
Vol 80-81 ◽  
pp. 350-354 ◽  
Author(s):  
Bin Wang ◽  
Zhu Long
Keyword(s):  
Catalytic Oxidation ◽  
Doping Concentration ◽  
Sol Gel ◽  
Aromatic Aldehydes ◽  
Average Diameter ◽  
Catalytic Performance ◽  
Doping Amount ◽  
Chemical Homogeneity ◽  
Oxidation Performance ◽  
B Doping

In order to study the morphology and catalytic oxidation performance of LaMnO3 nanoparticles after A or B site doping , the sol-gel methods is applied, the La1-xSrxMnO3 and LaCuxMn1-xO3（x=0.1, 0.2, 0.3, 0.4, 0.5) nanoparticles are prepared. The diameter of particles and morphology-distribution of naniparticles with different doping amounts are analyzed by X-ray diffraction (XRD), scan electric microscope (SEM) and related software. With the framework of the experiment, the average diameter of particles is between 16-21nm with better chemical homogeneity and have higher surface area. At the same time, the catalytic oxidation of nanoparticle under different doping amounts is also studied. Tests results show that nanoparticle has excellent catalytic oxidation performance, and with the increase of doping amount, the catalytic activity of the particle increase first and decrease afterwards with the increase of A or B site doping amount, the best performance presents at X=0.2 of A or B doping concentration. The effect of lattice deformation arising from the dopants, which leads to the decrease of the catalytic performance, can not be ignored at higher doping concentration anymore. Under the same doping amounts, the catalytic performance of B-site doped is better than A-site.

ChemInform Abstract: Aromatic Aldehydes via Catalytic Oxidation

ChemInform ◽  
1989 ◽  
Vol 20 (16) ◽  
Author(s):  
R. A. SHELDON ◽  
N. DE HEIJ
Keyword(s):  
Catalytic Oxidation ◽  
Aromatic Aldehydes

Status and development prospects of standard means for reproducing units of volumetric activity of radon and thoron and radon flux density from the soil surface

2020 ◽  
pp. 69-73
Author(s):  
S.G. Birjukov ◽  
O.I. Kovalenko ◽  
A.A. Orlov
Keyword(s):  
Flux Density ◽  
Soil Surface ◽  
National Standards ◽  
Measuring Instruments ◽  
Volumetric Activity ◽  
Standard Means ◽  
Radon Flux ◽  
Technical Solutions ◽  
Development Prospects ◽  
Physical Principles

The approach to creating standard means for reproducing units of volumetric activity of radon and thoron and flux density of radon from the soil surface is described based on the physical principles of reproducing these units of quantities and using as technical means for reproducing bubblers with a radioactive solution of radium salt, reference capacities of known volume, emanation chambers for generation of a toron, a gamma spectrometer with a semiconductor detector from highly pure germanium and radon radiometers. Reproduction consists in the physical realization of units in accordance with their definition as applied to the formation of radon and thoron in the radioactive rows of radium and thorium. The proposed approach will allow to determine the structural, structural and other technical solutions of standard measuring instruments, as well as specific techniques and methods of working with them. The creation of standard tools and technologies for reproducing units of volumetric activity of radon and thoron and the density of radon flux from the soil surface will ensure the unity and reliability of measurements in the field of ionizing radiation, traceability of units and bringing the characteristics of national standards in line with world achievements.

The Role and Place of Budget Procedure in the System

2003 ◽  
pp. 42-49 ◽  
Author(s):  
E. Bushmin
Keyword(s):  
Budget Process ◽  
Public Expenditures ◽  
Principal Role ◽  
Process Trends ◽  
The Given ◽  
Rules Of The Game

The article is devoted to the analysis of improving budget process trends. The author offers the concept of "financial technologism". Its usage should promote an essential improvement of the budget process. The given concept is based on the fact that the regulation of budget procedure is the process of determination of "rules of the game", and the order of interaction of different institutions within the framework of the budget process, and the trends and volumes of expenses are the strategy of institutions. The procedure within the budget process plays a principal role as compared with the trends and volumes of public expenditures.

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