Powered by OpenAIRE graph
Found an issue? Give us feedback
image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/ Journal of Chemistry...arrow_drop_down
image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
addClaim

This Research product is the result of merged Research products in OpenAIRE.

You have already added 0 works in your ORCID record related to the merged Research product.

SOLVENT-FREE DEHYDRATION OF SORBITOL TO ISOSORBIDE CATALYZED BY SULFONIC ACID RESINS

SOLVENT-FREE DEHYDRATION OF SORBITOL TO ISOSORBIDE CATALYZED BY SULFONIC ACID RESINS

Abstract

Исследована двойная циклодегидратация D‑сорбита до изосорбида на сульфокатионитах Amberlyst‑15 и КУ‑2‑8 при 120‑140 oC в реакторе периодического действия под вакуумом (150‑170 мбар) без растворителя. Установлено, что исследуемые катализаторы обеспечивают 78‑88% выход изосорбида с полной конверсией сорбита при 140 °С за 3 часа. Более стабильный Amberlyst 15 продуцирует 10 г изосорбида на 1 г катализатора за 3 часа при 130 °С. После 5 экспериментов в течение 3 ч при 125 oC концентрация кислотных центров на поверхности Amberlyst 15 снижается лишь на 4 %, конверсия сорбита и выход продуктов остаются почти неизменными. КУ‑2‑8 обеспечивает высокую начальную каталитическую активность, но после лишь одного цикла эта смола теряет 40 % сульфогрупп.

Досліджено подвійну циклодегідратацію D‑сорбіту до ізосорбіду на сульфокатіонітах Amberlyst 15 та КУ‑2‑8 при 120‑140 oC у реакторі періодичної дії під вакуумом (150‑170 мбар) без розчинника. Встановлено, що досліджувані каталізатори забезпечують 78‑88 % вихід ізосорбіду з повною конверсією сорбіту при 140 оС за 3 год. Більш стабільний Amberlyst 15 продукує 10 г ізосорбіду на 1 г каталізатора за 3 год при 130 оС. Після 5 експериментів протягом 3 год при 125 oC концентрація кислотних центрів на поверхні Amberlyst 15 знижується лише на 4 %, конверсія сорбіту та вихід продуктів залишаються майже незмінними. КУ‑2‑8 забезпечує високу початкову каталітичну активність, але лише після одного циклу ця смола втрачає 40 % сульфогруп.

The double cyclodehydration of D‑sorbitol to isosorbide on Amberlyst 15 and KU‑2‑8 sulfonic acid resins at 120‑140 оC in the batch reactor under vacuum (150‑170 mbar) without solvent was studied. It was found that the studied catalysts provide 78‑88 % isosorbide yield with a complete conversion of sorbitol at 140 оC for 3 h. More stable Amberlyst 15 produces 10 g of isosorbide per 1 g of catalyst for 3 h at 130 оC. After 5 experiments for 3 h at 125 oC acid site concentration on Amberlyst 15 surface reduced by only 4 %, sorbitol conversion and yield of products remain almost unchanged. KU‑2‑8 shows high initial catalytic activity, but after only one run this resin loses 40 % of sulfonic groups.

Keywords

дегидратация сорбита, гетерогенний каталіз, biomass, ізосорбід, isosorbide, гетерогенный катализ, біомаса, дегідратація сорбіту, полімери, sorbitol dehydration, heterogeneous catalysis, биомасса, полимеры, polymers, изосорбид

  • BIP!
    Impact byBIP!
    citations
    This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
    0
    popularity
    This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
    Average
    influence
    This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
    Average
    impulse
    This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
    Average
Powered by OpenAIRE graph
Found an issue? Give us feedback
citations
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
Average
Average
Average
gold
Related to Research communities
Energy Research