Supported H4SiW12O40 catalysts for α-pinene isomerization

József-Zsolt Szücs-Balázs; Maria Coroş; Adrian Woiczechowski-Pop; Gabriela Blăniƫă; Mircea Vlassa

doi:10.2478/s11532-012-0039-9

Supported H4SiW12O40 catalysts for α-pinene isomerization

Open Chemistry ◽

10.2478/s11532-012-0039-9 ◽

2012 ◽

Vol 10 (4) ◽

pp. 1208-1217 ◽

Cited By ~ 3

Author(s):

József-Zsolt Szücs-Balázs ◽

Maria Coroş ◽

Adrian Woiczechowski-Pop ◽

Gabriela Blăniƫă ◽

Mircea Vlassa

Keyword(s):

Reaction Temperature ◽

Environmentally Friendly ◽

Economic Methods

AbstractThe heterogeneous isomerization of α-pinene was studied at 100, 130 and 160°C using 10% supported H4SiW12O40 (SiW) on SiO2, TiO2 and HZSM-5. The effect of the reaction temperature and the concentration of the catalyst over the conversion of α-pinene and the selectivity of camphene, limonene and terpinolene had been monitored. The recovery, reuse and leaching effect of the catalysts were studied. Simple, environmentally friendly and economic methods for the synthesis of camphene and limonene were developed and optimized.

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Environmentally friendly pulping process for rice straw to eliminate black liquor discharge

TAPPI Journal ◽

10.32964/tj10.6.39 ◽

2011 ◽

Vol 10 (6) ◽

pp. 39-44

Author(s):

GUOLIN HUANG ◽

XIZHEN LIANG ◽

ZHONGSHENG CHEN ◽

CUIZHEN LI

Keyword(s):

Rice Straw ◽

Reaction Temperature ◽

Agricultural Production ◽

Caustic Potash ◽

Aqueous Ammonia ◽

Black Liquor ◽

Environmentally Friendly ◽

Analytical Techniques ◽

Batch Distillation ◽

Alkaline Conditions

Rice straw pulping trials were carried out with aqueous ammonia mixed with caustic potash to eliminate the black liquor problem in nonwood pulping. The black liquor, which contains nitrogen, potassium, and ammoniacal lignin, potentially can be used as a fertilizer for agricultural production. Excess ammonia in the black liquor was recovered by batch distillation. The black liquor was further treated for reuse by coagulation under alkaline conditions. Effects of flocculating condition, such as dosage of 10% aluminum polychloride, dosage of 0.1% polyacrylamide, and reaction temperature and pH of black liquor, were studied systematically by experiment to obtain suitable technological conditions. Infrared and other analytical techniques confirmed that major quantities of lignin, 23.73% nitrogen (dried basis), and 6.24% potassium (dried basis) existed in the flocculating residues, which has the potential to be a good solid fertilizer. The amount of delignification and the pulp screen yield for the process remained steady at 83%–85 % and 38-40 %, respectively, when reusing the supernatant four times.

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Esterification of glycerol with acetic acid over Lewatit catalyst

MATEC Web of Conferences ◽

10.1051/matecconf/201815401028 ◽

2018 ◽

Vol 154 ◽

pp. 01028 ◽

Cited By ~ 5

Author(s):

Lucky Setyaningsih ◽

Fahmi Siddiq ◽

Aqila Pramezy

Keyword(s):

Acetic Acid ◽

Optimum Condition ◽

Reaction Temperature ◽

Raw Materials ◽

Environmentally Friendly ◽

Liquid Fuels ◽

Molar Ratio ◽

Derivative Products ◽

Glycerol Esterification ◽

Glycerol Derivative

Tri Acetyl Glycerol or triacetin is one of the glycerol derivative products which can be used as additives in liquid fuels (octane boosters) to reduce knocking on the machine. The use of triacetin as octane booster is considered very promising because it comes from renewable and environmentally friendly raw materials. The resulting glycerol-based additives are suitable for gasoline, biodiesel and diesel. In this study glycerol esterification with acetic acid over Lewatit catalyst was investigated. The effects of various parameters, such as reaction temperature, weight of catalyst and molar ratio of glycerol to acetic acid were studied and the optimum condition for the triacetin synthesis are 100°C, 1: 7 mole of ratio and 3% weight of catalys

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Environmentally friendly pulping of rice straw to eliminate black liquor discharge

TAPPI Journal ◽

10.32964/tj9.8.7 ◽

2010 ◽

Vol 9 (8) ◽

pp. 7-12

Author(s):

GUOLIN HUANG ◽

XIZHEN LIANG ◽

ZHONGSHENG CHEN ◽

CUIZHEN LI

Keyword(s):

Rice Straw ◽

Reaction Temperature ◽

Agricultural Production ◽

Caustic Potash ◽

Aqueous Ammonia ◽

Black Liquor ◽

Environmentally Friendly ◽

Batch Distillation ◽

Alkaline Conditions

Rice straw pulping trials were carried out with aqueous ammonia mixed with caustic potash to eliminate problems associated with black liquor in nonwood pulping. This process likely can use the black liquor, which contains nitrogen, potassium, and ammoniacal lignin, as a fertilizer for agricultural production. Excess ammonia in the black liquor was recovered by batch distillation. The black liquor was further treated for reuse by coagulation under alkaline conditions. We studied the effects of flocculating conditions, such as dosage of 10% aluminum polychloride, dosage of 0.1% polyacrylamide, reaction temperature, and pH of black liquor to obtain suitable technological conditions. Analyses confirmed that major quantities of lignin and 23.7% nitrogen (dried basis), 6.2% potassium (dried basis) existed in the flocculating residues, so this is potentially a good solid fertilizer. The amount of delignification and the pulp screen yield for the process remained steady at 83%-85% and 38%-40%, respectively, when reusing the supernatant four times.

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Synthesizing environmentally friendly non-silicone oxygen bleaching stabilizer for linen yarn using oligomeric acrylic acid

Scientific Reports ◽

10.1038/s41598-021-89888-9 ◽

2021 ◽

Vol 11 (1) ◽

Author(s):

Jie Liu ◽

Chun Lv

Keyword(s):

Hydrogen Peroxide ◽

Reaction Time ◽

Acrylic Acid ◽

Reaction Temperature ◽

Metal Ion ◽

Monomer Concentration ◽

Environmentally Friendly ◽

Test Method ◽

Magnesium Salt ◽

Oxygen Bleaching

AbstractUsing potassium peroxodisulfate as an initiator and acrylic acid as a monomer, an acrylic acid oligomer was synthesized and then compounded with magnesium salt to form a non-silicone oxygen bleaching stabilizer. By investigating the effects of reaction temperature, reaction time, initiator concentration, monomer concentration, and magnesium salt dosage on product performance, the effect of stabilizers on linen yarn bleaching was analyzed. The synthetic conditions of oxygen bleaching stabilizer were determined by orthogonal test method, namely, acrylic acid monomer concentration 25%, initiator dosage 5%, oligomeric acrylic acid and magnesium salt compound ratio 5:1, reaction temperature 65 °C, reaction time 4 h. At this time, the chelated iron value of the product was as high as 239.314 mg/g, and the chelated calcium value also reached 145.000 mg/g. The dosage of the synthesized stabilizer were determined to be 4 g/L through indicators such as the decomposition rate of hydrogen peroxide and whiteness. The results showed that the environmentally friendly non-silicone oxygen bleaching stabilizer not only had a good ability to inhibit the decomposition of hydrogen peroxide, but also provided bleached linen yarn with a superior degree of whiteness and less metal ion residue, which can effectively solve the “silicon scale” problem and improve the quality of the pre-treatmented products.

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Optimization of Lipase Catalyzed Biofuel Synthesis From Waste Filter Coffee Using Response Surface Methodology

10.21203/rs.3.rs-671119/v1 ◽

2021 ◽

Author(s):

TOGAYHAN KUTLUK

Keyword(s):

Response Surface Methodology ◽

Response Surface ◽

Reaction Temperature ◽

Experimental Studies ◽

Acid Methyl Ester ◽

Environmentally Friendly ◽

Biodiesel Production ◽

Biofuel Production ◽

Molar Ratio ◽

Enzyme Content

Abstract This study was executed that optimize an environmentally friendly lipase (Resinase® HT with the activity of 135,56 U/ml) catalyzed transesterification process from novel feedstock waste filter coffee oil for biofuel production. Response surface methodology (RSM) with the central composite design was performed to investigate the effect of experimental factors (enzyme content, oil/methanol molar ratio, reaction temperature) on the fatty acid methyl ester (FAME) conversion and also investigated to resolve the optimum design points. After the experimental studies the lowest FAME conversion was found as 71% when the enzyme content was 15%(%gr w/w), oil/methanol molar ratio was 0.17 and the reaction temperature value was 45 °C. According to the design response, 70.83% was observed in the same conditions. The highest FAME conversion of 97% was found when the enzyme content was 5%(%gr w/w), oil/methanol molar ratio was 0.25 and the reaction temperature value was 35 °C. The experimental run gave the FAME conversion of 96.80% at the same reaction conditions. The model fitted with the experimental values with R2 = 0.98. Also, classical soxhlet extraction and Dyer method oil yields were compared. 24 % and 20 % oil removed from waste coffee grounds in traditional soxhlet and Dyer method respectively. The extraction process took 30 minutes with the soxhlet method and 45 minutes with the Dyer method. The results are promising for the application of lipase catalyst for environmentally friendly and sustainable biodiesel production from waste coffee oils all over the world.

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