Authors Zhu, YT; Liao, YH; Lv, W; Liu, J; Song, XB; Chen, LG; Wang, CG; Sels, BF; Ma, LL in AMER CHEMICAL SOC published article about CATALYTIC-OXIDATION; STRUCTURAL CHARACTERISTICS; LIGNIN DEPOLYMERIZATION; OXIDIZED CELLULOSE; MODEL COMPOUNDS; WET OXIDATION; BIOMASS; FRACTIONATION; CHEMICALS; TRANSFORMATION in [Zhu, Yuting; Lv, Wei; Liu, Jing; Song, Xiangbo; Chen, Lungang; Wang, Chenguang; Ma, Longlong] Chinese Acad Sci, Guangzhou Inst Energy Convers, Key Lab Renewable Energy, 2 Nengyuan Rd, Guangzhou 510640, Peoples R China; [Zhu, Yuting; Lv, Wei; Liu, Jing; Song, Xiangbo; Chen, Lungang; Wang, Chenguang; Ma, Longlong] Chinese Acad Sci, Guangzhou Inst Energy Convers, Guangdong Prov Key Lab New & Renewable Energy Res, 2 Nengyuan Rd, Guangzhou 510640, Peoples R China; [Liao, Yuhe; Sels, Bert F.] Katholieke Univ Leuven, CSCE, Celestijnenlaan 200F, B-3001 Heverlee, Belgium; [Sels, Bert F.] Chinese Acad Sci, Guangzhou Inst Energy Convers, 2 Nengyuan Rd, Beijing 100049, Peoples R China; [Zhu, Yuting; Liu, Jing; Song, Xiangbo] Univ Chinese Acad Sci, 19 A Yuquan Rd, Beijing 100049, Peoples R China in 2020.0, Cited 58.0. SDS of cas: 99-93-4. The Name is 4′-Hydroxyacetophenone. Through research, I have a further understanding and discovery of 99-93-4
Lignin transformation to high-value chemicals is key for forthcoming biorefineries. Here, we report efficient delignification of pine wood by oxidative biorefining in aqueous alkali, producing both vanillin and cellulose as valuable end products. Under optimal conditions, viz., 400 rpm, 160 degrees C, 1 h, 7.5 wt % NaOH, and 1 MPa O-2, more than 90% of lignin is converted and fractionated into monophenolics (29 wt % on Kraft lignin basis and vanillin yield is 21.1 wt %) and small oligophenolics (56.7 wt %, average M-w between 300 and 600 Da), next to a pool of small carboxylic acids. Depending on the conditions, a substantial amount of white residue can be formed as a coproduct, comprising 45% yield of 95.5% pure fibrous crystalline cellulose I, or a less pure cellulose residue can be obtained, which is highly reactive toward levulinic and formic acid formation using acid catalysis. Liquor refining by liquid-liquid extraction facilitates thorough identification of the main products by gas chromatography-mass spectrometry (MS), heteronuclear single quantum coherence NMR, electrospray ionization quadrupole time-of-flight mass spectrometry, and gel permeation chromatography. The mass balance shows close to 70% carbon efficiency of biomass conversion into useful products. Surprisingly, agitation speed, in addition to base concentration, temperature, and reaction time, is a crucial parameter to overcome deeper oxidation/condensation of soluble lignin fragments and to avoid substantial cellulose degradation. Similar reactions with other feedstock such as eucalyptus (hardwood), grasses, and a bagasse waste stream demonstrate the feasibility of the reported oxidative catalytic fractionation and the strong dependency of the product distribution on biomass variability within the different fractions.
SDS of cas: 99-93-4. Welcome to talk about 99-93-4, If you have any questions, you can contact Zhu, YT; Liao, YH; Lv, W; Liu, J; Song, XB; Chen, LG; Wang, CG; Sels, BF; Ma, LL or send Email.
Reference:
Indole alkaloid derivatives as building blocks of natural products from Bacillus thuringiensis and Bacillus velezensis and their antibacterial and antifungal activity study,
,Preparation of Indole Containing Building Blocks for the Regiospecific Construction of Indole Appended Pyrazoles and Pyrroles