Effect of carbon disulfide consumption on the basic properties of viscose prepared from radiation-modified cellulose

Stavtsov, A. K.; Drozdovskii, V. N.; Irklei, V. M.; Mokrousova, L. A.; Napalkova, T. A.

doi:10.1007/bf00547628

Cited by 3 publications

(3 citation statements)

References 1 publication

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The use of activation of cellulose by electron-beam [36][37][38][39][40][41][42] or microbiological (enzymatic) [43][44][45][46] treatment allows optimizing the molecular-weight distribution (MWD) of the cellulose (The MWD maximum is shifted to the region of a 350-450 degree of polymerization and decreases the amount of low-and high-molecular weight fractions), additionally decreases carbon disulfide consumption, and also makes it possible to eliminate the stage of preripening of the alkali cellulose. Using continuous processes for alkali treatment and squeezing out the alkali cellulose three separate times (with takeoff of the alkali squeezed out in the first squeezing stage containing the largest amount of hemicellulose) is an important innovation [32,33].…”

Section: America Western Europamentioning

confidence: 99%

Ways of developing chemical fibres based on cellulose: Viscose fibres and their prospects. Part 1. Development of viscose fibre technology. Alternative hydrated cellulose fibre technology

Perepelkin

2008

Fibre Chem

View full text Add to dashboard Cite

The noted Russian scientist, Professor Zakhar Aleksandrovich Rogovin, coined the slogan: Lets make cellulose better than it was created by Nature. The history of the evolution of chemical fibres shows that his prediction is being successfully realized, as the increase in production of viscose fibres and the solution of long-standing problems of recycling and detoxifying emissions indicate. New kinds of viscose staple fibres have been created: cotton-like (modal), antimicrobial, difficultly combustible, and many others.The chemical aspects and basic physicochemical characteristics of viscose fibre production were established a relatively long time ago. However, the technologies and equipment described in many monographs and review articles [1-7] have aged significantly, while the problems of recycling chemicals and scrubbing emissions, especially gaseous emissions, have not been examined in sufficient depth. In addition, there were almost no publications on viscose fibres during restructuring of the economy in our country. However, life continues, and much that is new has appeared in the viscose production sector and requires analysis and generalization.The constant increase in production is the best criterion of the development of viscose fibre production. Beginning in 2001, the production rate increased significantly. The annual increase in production of viscose fibres of 7-11% [8-13] is greater than the rate of increase in the production of most staple fibres with a simultaneous decrease in production of viscose yarns.Beginning with the last quarter of the 20th century, no comprehensive analysis of the technologies and other factors that determine the state of viscose fibre production has been published in the Russian literature. As a result, an mistaken opinion has arisen concerning the poor prospects for viscose production due to the development of synthetic fibres and the advent of Lyocell fibres.* The Russian literature is significantly lagging behind the real development of modern viscose technology. However, many new technical solutions have appeared in this sector, and new equipment and new solutions to problems of recycling chemical and treating emissions have been developed.I have had the occasion to work on viscose production technology, mastering and developing new equipment, treating wastewaters and gaseous emissions, becoming familiar with the operation of a number of the leading world enterprises and companies in viscose production, as well as participating in international conferences on the development of viscose technology, equipment, and treatment of emissions. My accumulated experience combined with the information obtained by the leading companies in different countries allowed analyzing the current state and ways of developing viscose technology presented in the present analytical review.

show abstract

Section: America Western Europamentioning

confidence: 99%

Ways of developing chemical fibres based on cellulose: Viscose fibres and their prospects. Part 1. Development of viscose fibre technology. Alternative hydrated cellulose fibre technology

Perepelkin

2008

Fibre Chem

View full text Add to dashboard Cite

show abstract

“…[4] Over one million tons of CS 2 are produced annually worldwide for the utilization in cellophane and rayon production. [5,6] Nevertheless, the discharge of waste CS 2 into the environment can form the photochemical tropospheric sulfur aerosol, which is intensely harmful to the environment and human health. [7,8] On the other hand, substantial quantities of COS is released from the consumption of fossil fuels as a waste gas that can cause sulfur aerosols, fog, haze, acid rain, and the damage of ozonosphere in the atmosphere.…”

Section: Introductionmentioning

confidence: 99%

“…Sulfur is also an industrial major feedstock to produce carbon disulfide (CS 2 ) and carbonyl sulfide (COS) [4] . Over one million tons of CS 2 are produced annually worldwide for the utilization in cellophane and rayon production [5,6] . Nevertheless, the discharge of waste CS 2 into the environment can form the photochemical tropospheric sulfur aerosol, which is intensely harmful to the environment and human health [7,8] .…”

Section: Introductionmentioning

confidence: 99%

O/S Exchange Reaction in Synthesizing Sulfur‐Containing Polymers

Sun,

Zhang,

Zhang

2024

Chemistry A European J

View full text Add to dashboard Cite

Using carbon disulfide (CS2) and carbonyl sulfide (COS) as sulfur‐containing and one‐carbon feedstocks to make value‐added products is paramount for both pure and applied chemistry and environmental science. One of the practical strategies is to copolymerize these bulk chemicals with epoxides to produce sulfur‐containing polymers. This approach contributes to improving the sustainability of polymer manufacturing, provides highly desired functional polymer materials, and has attracted much attention. However, these copolymerizations invariably exhibit the intensely complicated chemistry of O/S exchange reaction, leading to sulfur‐containing polymers with diverse architectures. As the understanding of O/S exchange continues to deepen, recent efforts have guided significant advances in the synthesis of CS2‐ and COS‐based polymers. This review examines the O/S exchange chemistry and summarizes the recent progress in this field to promote the further advance of synthesizing sulfur‐containing polymers from CS2 and COS.

show abstract

Hydrolytic cleavage of both CS2 carbon–sulfur bonds by multinuclear Pd(II) complexes at room temperature

et al. 2016

View full text Add to dashboard Cite

Developing homogeneous catalysts that convert CS and COS pollutants into environmentally benign products is important for both fundamental catalytic research and applied environmental science. Here we report a series of air-stable dimeric Pd complexes that mediate the facile hydrolytic cleavage of both CS carbon-sulfur bonds at 25 °C to produce CO and trimeric Pd complexes. Oxidation of the trimeric complexes with HNO regenerates the dimeric starting complexes with the release of SO and NO. Isotopic labelling confirms that the carbon and oxygen atoms of CO originate from CS and HO, respectively, and reaction intermediates were observed by gas-phase and electrospray ionization mass spectrometry, as well as by Fourier transform infrared spectroscopy. We also propose a plausible mechanistic scenario based on the experimentally observed intermediates. The mechanism involves intramolecular attack by a nucleophilic Pd-OH moiety on the carbon atom of coordinated µ-OCS, which on deprotonation cleaves one C-S bond and simultaneously forms a C-O bond. Coupled C-S cleavage and CO release to yield [(bpy)Pd(µ-S)](NO) (bpy, 2,2'-bipyridine) provides the thermodynamic driving force for the reaction.

show abstract

Effect of carbon disulfide consumption on the basic properties of viscose prepared from radiation-modified cellulose

Cited by 3 publications

References 1 publication

Ways of developing chemical fibres based on cellulose: Viscose fibres and their prospects. Part 1. Development of viscose fibre technology. Alternative hydrated cellulose fibre technology

Ways of developing chemical fibres based on cellulose: Viscose fibres and their prospects. Part 1. Development of viscose fibre technology. Alternative hydrated cellulose fibre technology

O/S Exchange Reaction in Synthesizing Sulfur‐Containing Polymers

Hydrolytic cleavage of both CS2 carbon–sulfur bonds by multinuclear Pd(II) complexes at room temperature

Contact Info

Product

Resources

About