scholarly journals Highly efficient conversion of CO2 to cyclic carbonates with a binary catalyst system in a microreactor: intensification of “electrophile–nucleophile” synergistic effect

RSC Advances ◽  
2018 ◽  
Vol 8 (68) ◽  
pp. 39182-39186 ◽  
Author(s):  
Ming-Ran Li ◽  
Ming-Chao Zhang ◽  
Tian-Jun Yue ◽  
Xiao-Bing Lu ◽  
Wei-Min Ren
Keyword(s):  
Synergistic Effect ◽  
Ammonium Salt ◽  
Coupling Reaction ◽  
Catalyst System ◽  
Cyclic Carbonates ◽  
Efficient Conversion ◽  
Highly Efficient ◽  
System P ◽  
Binary Catalyst

An intensification of the “electrophile–nucleophile” synergistic effect was achieved in a microreactor for the coupling reaction of CO2 and epoxides mediated by the binary Al complex/ternary ammonium salt catalyst system.

scholarly journals Highly Efficient MOF Catalyst Systems for CO2 Conversion to Bis-Cyclic Carbonates as Building Blocks for NIPHUs (Non-Isocyanate Polyhydroxyurethanes) Synthesis

Catalysts ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 628
Author(s):  
Adolfo Benedito ◽  
Eider Acarreta ◽  
Enrique Giménez
Keyword(s):  
Molar Mass ◽  
Cycloaddition Reaction ◽  
Building Blocks ◽  
Catalyst System ◽  
Cyclic Carbonate ◽  
Ammonium Bromide ◽  
Cyclic Carbonates ◽  
High Molar Mass ◽  
Highly Efficient ◽  
Free Process

The present paper describes a greener sustainable route toward the synthesis of NIPHUs. We report a highly efficient solvent-free process to produce [4,4′-bi(1,3-dioxolane)]-2,2′-dione (BDC), involving CO2, as renewable feedstock, and bis-epoxide (1,3-butadiendiepoxide) using only metal–organic frameworks (MOFs) as catalysts and cetyltrimethyl-ammonium bromide (CTAB) as a co-catalyst. This synthetic procedure is evaluated in the context of reducing global emissions of waste CO2 and converting CO2 into useful chemical feedstocks. The reaction was carried out in a pressurized reactor at pressures of 30 bars and controlled temperatures of around 120–130 °C. This study examines how reaction parameters such as catalyst used, temperature, or reaction time can influence the molar mass, yield, or reactivity of BDC. High BDC reactivity is essential for producing high molar mass linear non-isocyanate polyhydroxyurethane (NIPHU) via melt-phase polyaddition with aliphatic diamines. The optimized Al-OH-fumarate catalyst system described in this paper exhibited a 78% GC-MS conversion for the desired cyclic carbonates, in the absence of a solvent and a 50 wt % chemically fixed CO2. The cycloaddition reaction could also be carried out in the absence of CTAB, although lower cyclic carbonate yields were observed.

Scalable, Durable, and Recyclable Metal‐Free Catalysts for Highly Efficient Conversion of CO 2 to Cyclic Carbonates

2020 ◽  
Vol 59 (51) ◽  
pp. 23291-23298
Author(s):  
Yao‐Yao Zhang ◽  
Guan‐Wen Yang ◽  
Rui Xie ◽  
Li Yang ◽  
Bo Li ◽  
...  
Keyword(s):  
Cyclic Carbonates ◽  
Metal Free ◽  
Efficient Conversion ◽  
Highly Efficient

Ambient chemical fixation of CO2 using a highly efficient heterometallic helicate catalyst system

2018 ◽  
Vol 54 (18) ◽  
pp. 2212-2215 ◽  
Author(s):  
Li Wang ◽  
Cong Xu ◽  
Qingxin Han ◽  
Xiaoliang Tang ◽  
Panpan Zhou ◽  
...  
Keyword(s):  
Catalyst System ◽  
Chemical Fixation ◽  
Highly Efficient ◽  
System P

Two novel heptanuclear 3d–4f helicates have been synthesized and characterized.

scholarly journals Comparing kinetic profiles between bifunctional and binary type of Zn(salen)-based catalysts for organic carbonate formation

2014 ◽  
Vol 10 ◽  
pp. 1817-1825 ◽  
Author(s):  
Carmen Martín ◽  
Arjan W Kleij
Keyword(s):  
Catalyst Concentration ◽  
Catalyst System ◽  
Bifunctional Catalyst ◽  
Cyclic Carbonates ◽  
First Order ◽  
Order Dependence ◽  
Carbonate Formation ◽  
Salen Complexes ◽  
Organic Carbonate ◽  
Binary Catalyst

Zn(salen) complexes have been employed as active catalysts for the formation of cyclic carbonates from epoxides and CO2. A series of kinetic experiments was carried out to obtain information about the mechanism for this process catalyzed by these complexes and in particular about the order-dependence in catalyst. A comparative analysis was done between the binary catalyst system Zn(salphen)/NBu4I and a bifunctional system Zn(salpyr)·MeI with a built-in nucleophile. The latter system demonstrates an apparent second-order dependence on the bifunctional catalyst concentration and thus follows a different, bimetallic mechanism as opposed to the binary catalyst that is connected with a first-order dependence on the catalyst concentration and a monometallic mechanism.

ChemInform Abstract: CuS/Fe: A Novel and Highly Efficient Catalyst System for Coupling Reaction of Aryl Halides with Diaryl Diselenides.

ChemInform ◽  
2011 ◽  
Vol 42 (8) ◽  
pp. no-no
Author(s):  
Yaming Li ◽  
Huifeng Wang ◽  
Xiaoying Li ◽  
Tao Chen ◽  
Defeng Zhao
Keyword(s):  
Coupling Reaction ◽  
Catalyst System ◽  
Aryl Halides ◽  
Efficient Catalyst ◽  
Highly Efficient

Highly active and selective binary catalyst system for the coupling reaction of CO2 and hydrous epoxides

2013 ◽  
Vol 379 ◽  
pp. 38-45 ◽  
Author(s):  
Ren-Jian Wei ◽  
Xing-Hong Zhang ◽  
Bin-Yang Du ◽  
Zhi-Qiang Fan ◽  
Guo-Rong Qi
Keyword(s):  
Coupling Reaction ◽  
Catalyst System ◽  
Highly Active ◽  
Binary Catalyst

Copolymerization of lactide, epoxides and carbon dioxide: a highly efficient heterogeneous ternary catalyst system

2021 ◽  
Vol 12 (11) ◽  
pp. 1700-1706
Author(s):  
Xiang Li ◽  
Ran-long Duan ◽  
Chen-yang Hu ◽  
Xuan Pang ◽  
Ming-xiao Deng
Keyword(s):  
Carbon Dioxide ◽  
Catalyst System ◽  
Polymer Chains ◽  
Polymer Chemistry ◽  
Highly Efficient ◽  
System P ◽  
Ternary Catalyst

The controlled copolymerization of mixed monomers that usually imparts distinct advantages into single polymer chains and requires a single versatile catalyst remains a key challenge in polymer chemistry.

Highly efficient conversion of carbohydrates into 5-hydroxymethylfurfural using the bi-functional CrPO4 catalyst

RSC Advances ◽  
2016 ◽  
Vol 6 (10) ◽  
pp. 8048-8052 ◽  
Author(s):  
Siquan Xu ◽  
Xiaopei Yan ◽  
Quan Bu ◽  
Haian Xia
Keyword(s):  
Biphasic System ◽  
Efficient Synthesis ◽  
Efficient Conversion ◽  
Highly Efficient ◽  
System P

The highly efficient synthesis of 5-hydroxymethylfurfural (HMF) from carbohydrates was achieved using the inexpensive and bi-functional CrPO4 catalyst in a biphasic system.

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