Delignification of Vegetable Raw Material Catalytic by Hydrogen Peroxide and Peroxi-Combinations (Review)

Pen, R. Z.; Karetnikova, Natalʹya Viktorovna; Shapiro, I. L.

doi:10.14258/jcprm.2020048119

Cited by 4 publications

(1 citation statement)

References 8 publications

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“…The appearance of the case for placing a universal set of tools in the open position is shown in Fig. 1 Patents for inventions were previously obtained for indicator compositions for the detection of NDMG and oxidants [3,4].…”

Section: Results and Their Discussionmentioning

confidence: 99%

Development of a universal kit for rapid detection of aggressive chemicals, rocket fuel components and uranium components and uranium compounds in various environments

Pashinin,

Popov,

Sukhov

et al. 2023

E3S Web Conf.

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The materials of the article are devoted to the issues of ecology and safety at enterprises and railway transport. The urgency of developing a universal kit for rapid detection of aggressive chemicals, rocket fuel components and uranium compounds in various environments is due to the fact that the presence on the surface and in water can lead to poisoning and chemical burns of working personnel and the public. It is also caused by the need to make managerial decisions when eliminating the consequences of accidents at food and related industries. The article discusses the methods of rapid detection of aggressive chemicals and suggests scientific, methodological and technological approaches to the development of a universal set of tools for group rapid detection of aggressive chemicals and uranium compounds in water and on the surfaces of objects using aerosol devices with original indicator formulations. The place of research is Moscow and the Moscow region

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Section: Results and Their Discussionmentioning

confidence: 99%

Development of a universal kit for rapid detection of aggressive chemicals, rocket fuel components and uranium components and uranium compounds in various environments

Pashinin,

Popov,

Sukhov

et al. 2023

E3S Web Conf.

View full text Add to dashboard Cite

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Peroxide Cellulose From Wheat Straw

Pen¹,

Shapiro²,

Karetnikova³

2022

JCPRM

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The stalks of wheat straw (triticum sh,), stored up in Еmеlyanovsk region of the Krasnoyarsk hand edge in the form of segment in 2–3 cm treated by the water solution of hydrogen peroxide and acetic acid with the catalytic amount of the sulfuric acid under hydromodule 6. The acetic acid is oxidated to peracetic acid, which, in turn, oxidizes lignin with forming of the dissolved products. The variable technological factors and ranges of their variation: initial concentration of the acetic acid (4–8-mol/l), hydrogen peroxide (3–5-mol/l); the sulfuric acid (0.25–0.65 mass.%); the temperature (80–90 °C) and cooking duration (240–330 min). The dependencies of the dissolved lignin part, output and whiteness of the cellulose from variable factor aproximated by the regression equations of the second order. The equations used for graphic presentation results and calculation of the optimum conditions of the process. On the leading indexes (output 49–63%, whiteness before 89%, explosive length before 8700 m, forcing through resistance before 240 кPа, tear resistance 420 mN) peroxide cellulose from wheat straw with the degree of the grind 30 °ShR does not concession by specified characteristic of the sulphate unbleached cellulose from hard wood. The possibility of the cellulose reception with high whiteness after cooking will allow in the row account to refuse from high-priced following bleaching.

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Peroxide Cellulose From Wheat and Hemp Stems

Pen,

Shapiro,

Karetnikova

et al. 2023

JCPRM

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The wheat steams (Triticum sh.), hemp and shive from the technical cannabis (Cannabis sativa), wood of Siberia fir (Abies sibirica) was processed with the sodium hydrate (concentration NaOH 1 g-mol/dm3, liquid module 6, temperature 93 °C, length 2 hours), washed with water and delignificated by the “hydrogen peroxide – sulfuric acid – water” solution (initial concentration of the acetic acid 6 g-mol/dm3, hydrogen peroxide – also 6 g-mol/dm3 , sulfuric acid – 1.5% (mass.), liquid module 6, temperature of the isothermal process 93 °C, length 210 minutes). Simultaneously the same vegetable raw material was delignificated without alkaline preprocessing and without sulfuric acid catalyst at the cooking. The purpose of the study – estimation of the influence named factors on output and characteristic of the cellulose. Mathematical processing is performed with the methods of the cluster and dispersing analysis. Alkaline preprocessing has brought to reduction of the output and degree polymerization and to increase the iodine number only to celluloses from wheat straw. The additive catalytic amount of the sulfuric acid to cooking solution brought to the reduction of the output and degree polymerization and to increase the iodine number of the cellulose from all type used one-year vegetable raw. Under approaching choice technological cooking conditions it is possible reception of the product with the characteristics microcrystalline celluloses (the degree polymerization not above 300, iodine number not less 10 mg/g) with one-stage peroxide cooking without alkaline preprocessing and catalyst.

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Delignification of Vegetable Raw Material Catalytic by Hydrogen Peroxide and Peroxi-Combinations (Review)

Cited by 4 publications

References 8 publications

Development of a universal kit for rapid detection of aggressive chemicals, rocket fuel components and uranium components and uranium compounds in various environments

Development of a universal kit for rapid detection of aggressive chemicals, rocket fuel components and uranium components and uranium compounds in various environments

Peroxide Cellulose From Wheat Straw

Peroxide Cellulose From Wheat and Hemp Stems

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