Hydrogenation of Polymeric Petroleum Resins in the Presence of Unsupported Sulfide Nanocatalysts

Petrukhina, N. N.; Zakharyan, E. M.; Корчагина, С. А.; Nagieva, M. V.; Максимов, А. Л.

doi:10.1134/s0965544117140080

Cited by 10 publications

(5 citation statements)

References 24 publications

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“…However, the molecular weight of the product decreased by 16% after hydrogenation, indicating that polymer degradation occurred during hydrogenation, which might be caused by the excessively high reaction temperature. Petrukhina et al 142 used W/Ni sulfide to catalyze the hydrogenation of petroleum resin at 310 °C, and the conversion rates of olefins and aromatics were 100% and 23%, respectively. They proposed a method to inhibit the degradation of petroleum resins: in highly concentrated solutions, the polymer molecules are in the form of dense coils, whereas in dilute solutions, the polymer undergoes swelling and the chains unfold, making the polymer easier to degrade.…”

Section: Dicyclopentadiene (Dcpd)mentioning

confidence: 99%

Advances in the Catalytic Hydrogenation and Properties of Unsaturated Polymers

Yan

Cao

2023

Macromolecules

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Polymer reaction and performance improvement are one of the important contents in the field of polymer materials science and engineering, in which polymer catalytic hydrogenation is an important part of polymer reaction. We reviewed the research achievements on polymer hydrogenation over the past 70 years and studied the mechanism of the hydrogenation reaction from the aspects of performance changes before and after polymer hydrogenation, the catalyst preparation/structure−activity relationship, and polymer hydrogenation kinetics. We pointed out the difficulty in separation and unsatisfactory high-temperature adaptability of traditional homogeneous catalysts and first proposed four effects affecting traditional heterogeneous polymer hydrogenation: scale effect, conformation effect, viscosity effect, and adhesion effect. Based on the structure−activity relationship of polymers, we put forward the application direction of hydrogenated polymers at present. We found that using a new kind of nanometal catalyst (Pd/CNTs@FN) as hydrogenation catalyst can effectively reduce or eliminate the negative effects of these four effects on the polymer hydrogenation reaction, and it is easy to separate from the reaction system. The addition of CNTs can effectively increase the specific surface area of the catalyst and strengthen the interaction between reactants and catalyst. Subsequent research should focus on designing the multiscale structure and improving low-temperature activity of the catalyst, reducing process cost, and using green and efficient separation methods to eliminate adverse effects, create a green and efficient polymer reaction system, accelerate the industrialization of polymer hydrogenation process, and provide theoretical guidance for the research and development of new polymer materials.

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Section: Dicyclopentadiene (Dcpd)mentioning

confidence: 99%

Advances in the Catalytic Hydrogenation and Properties of Unsaturated Polymers

Yan

Cao

2023

Macromolecules

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“…Dicyclopentadiene (DCPD) petroleum resin is produced by polymerization of C 5 fraction monomer, which is the byproduct derived from the steam cracking unit. , DCPD resin is widely used in hot-melt adhesives, coating agents, paints, rubber, inks, and other fields. − However, DCPD resin without any post-treatment is usually yellow and gives off an unfriendly smell due to the presence of unsaturated CC bonds. , The catalytic hydrogenation is a common strategy to enhance the properties of petroleum resin in terms of weather resistance, stability, and compatibility. − Yuan et al prepared a series of Ni-based materials with high dispersion using layered materials as precursors, ,, and Wang et al constructed a series of Ni catalysts using supports with high specific surface area, ,− all of which were aimed at improving the utilization efficiency of active sites as much as possible. However, due to the difference in intrinsic activity, Ni-based catalysts often require higher content in use and their sulfur resistance needs to be enhanced.…”

Section: Introductionmentioning

confidence: 99%

“…Transition metal sulfides are commonly used in industry as catalysts with high resistance to sulfur at present. Petrukhina et al used supported and unsupported sulfide catalysts for the hydrogenation of polymeric petroleum resin. − Although these sulfide catalysts can be used as candidate catalysts for the hydrogenation of petroleum resin, the reaction conditions are relatively harsh. In addition, in order to maintain the sulfide state of the catalyst, sulfur-containing agents need to be added to the feedstock, which can contaminate the product.…”

Section: Introductionmentioning

confidence: 99%

Hydrotalcite-Based Bimetallic PdNi Catalysts with High Sulfur Tolerance for the Hydrogenation of Dicyclopentadiene Resin

Bai

Chen

Liang

2023

Ind. Eng. Chem. Res.

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The catalytic hydrogenation of unsaturated bonds in petroleum resin is a promising way to enhance the properties of petroleum resin in terms of weather resistance, stability, and compatibility. However, the presence of sulfur compounds in petroleum resin poses a high challenge to hydrogenation catalysts. Herein, based on the cation-tunability of hydrotalcite-like compounds, a series of PdNi bimetallic catalysts are prepared by calcination−reduction of their hydrotalcite-like precursors and applied in the hydrogenation of dicyclopentadiene (DCPD) petroleum resin. By tuning the molar ratios of Pd/Ni and optimizing the reaction conditions, the optimal Pd 1 Ni 1 −MgAlO− HT catalyst can obtain the hydrogenated DCPD petroleum resin with saturation up to 91.5% at 255 °C, 10 MPa H 2 pressure, and 3 h reaction time with the presence of 50 ppm sulfur compound. As compared with the monometallic catalyst, the PdNi bimetallic catalyst presents higher sulfur tolerance in the hydrogenation of DCPD petroleum resin. Combined with the analysis results of XRD, XPS, TEM, and H 2 -TPR, the enhanced catalytic performance of the Pd 1 Ni 1 −MgAlO−HT catalyst can be attributed to the small particle size, high dispersion of metal particles, and the synergy effect between Pd and Ni species. This work will guide to design a highly efficient sulfur tolerance catalyst derived from the hydrotalcite-like precursor for the hydrogenation of polymers.

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“…To date, the catalysts for the hydrogenation of PR to produce high-quality HPR mainly include the palladium-based catalysts, − metal sulfide catalysts, ,, and nickel-based catalysts. − Bai et al reported the hydrogenation of dicyclopentadiene resin over supported palladium catalysts with high dispersity derived from the direct reduction of hydrotalcite-like compounds. Satisfactorily, the hydrogenation degree (HD) could be reached up to 96.5% after hydrogenation.…”

Section: Introductionmentioning

confidence: 99%

“…5−8 The hydrogenated PR (HPR) has a watery white color, high thermal stability, and good aging and weather resistance, which can be utilized as pressure-sensitive adhesives, disposable hygiene products, and many other high-value-added products. 9 −12 To date, the catalysts for the hydrogenation of PR to produce high-quality HPR mainly include the palladium-based catalysts, 13−16 metal sulfide catalysts, 5,17,18 and nickel-based catalysts. 19−23 Bai et al 16 reported the hydrogenation of dicyclopentadiene resin over supported palladium catalysts with high dispersity derived from the direct reduction of hydrotalcite-like compounds.…”

Section: Introductionmentioning

confidence: 99%

Hierarchical Flower-Like NiCu/SiO₂ Bimetallic Catalysts with Enhanced Catalytic Activity and Stability for Petroleum Resin Hydrogenation

Sun

Yang

Zhang

et al. 2021

Ind. Eng. Chem. Res.

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The catalytic hydrogenation of petroleum resin (PR) is an efficient process to produce high-value-added hydrogenated PR with improved performance and wide applications. Herein, a hierarchical flower-like NiCu/SiO 2 bimetallic catalyst has been successfully prepared by reducing the hierarchically structured NiCu silicate precursor ((Ni,Cu) 3 Si 2 O 5 (OH) 4 ) and applied for PR hydrogenation. The generated bimetallic NiCu alloy nanoparticles are anchored on the surface of the intercrossed silica nanoplatelets, constructing a unique multilevel NiCu/SiO 2 superstructure. Moreover, the addition of Cu could not only lower the reduction temperature of Ni species but also provide electrons to Ni to form electron-rich active sites. The NiCu/SiO 2 bimetallic catalyst exhibited enhanced catalytic activity and stability for PR hydrogenation. The hydrogenation degrees for C 5 PR and C 9 PR could reach up to 94.9 and 96.3%, respectively, which are much higher than those catalyzed by the catalyst prepared via an impregnation method (85.9 and 88.7%). Such notably enhanced performances could be ascribed to the synergistic effect between Ni−Cu bimetals and the highly porous superstructure. Our findings provide guidance for the design and synthesis of efficient and stable bimetallic nanocatalysts for PR hydrogenation.

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Hydrogenation of Polymeric Petroleum Resins in the Presence of Unsupported Sulfide Nanocatalysts

Cited by 10 publications

References 24 publications

Advances in the Catalytic Hydrogenation and Properties of Unsaturated Polymers

Advances in the Catalytic Hydrogenation and Properties of Unsaturated Polymers

Hydrotalcite-Based Bimetallic PdNi Catalysts with High Sulfur Tolerance for the Hydrogenation of Dicyclopentadiene Resin

Hierarchical Flower-Like NiCu/SiO₂ Bimetallic Catalysts with Enhanced Catalytic Activity and Stability for Petroleum Resin Hydrogenation

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Hydrogenation of Polymeric Petroleum Resins in the Presence of Unsupported Sulfide Nanocatalysts

Cited by 10 publications

References 24 publications

Advances in the Catalytic Hydrogenation and Properties of Unsaturated Polymers

Advances in the Catalytic Hydrogenation and Properties of Unsaturated Polymers

Hydrotalcite-Based Bimetallic PdNi Catalysts with High Sulfur Tolerance for the Hydrogenation of Dicyclopentadiene Resin

Hierarchical Flower-Like NiCu/SiO2 Bimetallic Catalysts with Enhanced Catalytic Activity and Stability for Petroleum Resin Hydrogenation

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Product

Resources

About

Hierarchical Flower-Like NiCu/SiO₂ Bimetallic Catalysts with Enhanced Catalytic Activity and Stability for Petroleum Resin Hydrogenation