scholarly journals Influence of solid loading on D-xylose production through dilute sulphuric acid hydrolysis of olive stones

2015 ◽  
Vol 66 (3) ◽  
pp. e084 ◽  
Author(s):  
S. Sánchez ◽  
M. Cuevas ◽  
M. Saleh ◽  
J. F. García-Martín
Keyword(s):  
Acid Hydrolysis ◽  
Sulphuric Acid ◽  
Solid Loading ◽  
Olive Stones ◽  
Xylose Production ◽  
Hydrolysis Of

The synthesis of Cyclododecane-r-1,c-5,c-9-triamine and r-1,c-5,c-9-Tris(2,3-dimethoxybenzamido)cyclododecane

1975 ◽  
Vol 28 (3) ◽  
pp. 673 ◽  
Author(s):  
DJ Collins ◽  
C Lewis ◽  
JM Swan
Keyword(s):  
Aqueous Solution ◽  
Acid Hydrolysis ◽  
Sulphuric Acid ◽  
Sodium Carbonate ◽  
Sodium Azide ◽  
Room Temperature ◽  
Dimethyl Formamide ◽  
Lithium Aluminium Hydride ◽  
Lithium Aluminium ◽  
Hydrolysis Of

Treatment of cyclododecane-r-1,c-5,c-9-triyl tris(p-toluenesulphonate) with sodium azide in dimethyl-formamide at 100� for 6 h gave the corresponding cis,cis-triazide which upon hydrogenation or reduction with lithium aluminium hydride gave cyclododecane-r-1,c-5,c-9-triamine, isolated as the tris-salicylidene derivative. Acid hydrolysis of this, removal of the salicylaldehyde, and treatment of the aqueous solution with sodium carbonate and 2,3-dimethoxybenzoyl chloride gave r-1,c-5,c- 9-tris(2,3-dimethoxybenzamido)cyclododecane. ��� Treatment of (E,E,E)-cyclododeca-1,5,9-triene with an excess of acetonitrile and sulphuric acid at room temperature for three days gave 18% of (E,E)-1-acetamidocyclododeca-4,8-diene; no di- or tri-amides were isolated.

Hemtacetal formation in sulphuric acid hydrolysis of a chloro olefin

1973 ◽  
Vol 14 (8) ◽  
pp. 585-588 ◽  
Author(s):  
E.P. Woo ◽  
K.T. Mak ◽  
H.N.C. Wong
Keyword(s):  
Acid Hydrolysis ◽  
Sulphuric Acid ◽  
Hydrolysis Of

Kinetic studies of two-stage sulphuric acid hydrolysis of sugarcane bagasse

2015 ◽  
Vol 83 ◽  
pp. 850-858 ◽  
Author(s):  
Sachin Kumar ◽  
Pratibha Dheeran ◽  
Surendra P. Singh ◽  
Indra M. Mishra ◽  
Dilip K. Adhikari
Keyword(s):  
Acid Hydrolysis ◽  
Sulphuric Acid ◽  
Sugarcane Bagasse ◽  
Kinetic Studies ◽  
Two Stage ◽  
Hydrolysis Of

scholarly journals The sulphuric acid hydrolysis of butter-fats

The Analyst ◽  
1893 ◽  
Vol 18 (July) ◽  
pp. 165b
Author(s):  
S. Rideal
Keyword(s):  
Acid Hydrolysis ◽  
Sulphuric Acid ◽  
Hydrolysis Of

scholarly journals Kinetic Study of Acid Hydrolysis of Rice Straw

2013 ◽  
Vol 2013 ◽  
pp. 1-5 ◽  
Author(s):  
Nibedita Sarkar ◽  
Kaustav Aikat
Keyword(s):  
Reaction Time ◽  
Acid Hydrolysis ◽  
Rice Straw ◽  
Main Product ◽  
Value Added ◽  
Dilute Acid ◽  
Dilute Acid Hydrolysis ◽  
Xylose Production ◽  
Hydrolysis Of ◽  
Value Added Products

Rice straw is a renewable, cheap, and abundant waste in tropical countries. The pentose content of rice straw can be used as a substrate for many types of value-added products such as xylitol and biofuel. Dilute acid hydrolysis mainly releases pentose from rice straw. The objective of the study was to determine the effect of H2SO4 concentration and reaction time on the xylose production. The variation of the main product xylose with the reaction time was described by a kinetic model and kinetic parameters were calculated to describe the variation of the xylose production with time. The optimum yield (19.35 g/L) was obtained at 0.24 mol/L H2SO4 and 30 minutes.

scholarly journals Acid and Enzymatic Fractionation of Olive Stones for Ethanol Production Using Pachysolen tannophilus

Processes ◽  
2020 ◽  
Vol 8 (2) ◽  
pp. 195 ◽  
Author(s):  
Manuel Cuevas ◽  
Marwa Saleh ◽  
Juan F. García-Martín ◽  
Sebastián Sánchez
Keyword(s):  
Enzymatic Hydrolysis ◽  
Liquid Fraction ◽  
Raw Material ◽  
Dilute Acid Pretreatment ◽  
Dilute Acid ◽  
Acid Pretreatment ◽  
Pachysolen Tannophilus ◽  
Olive Stones ◽  
Xylose Production ◽  
Hydrolysis Of

Olive stones are an abundant lignocellulose material in the countries of the Mediterranean basin that could be transformed to bioethanol by biochemical pathways. In this work, olive stones were subjected to fractionation by means of a high-temperature dilute-acid pretreatment followed by enzymatic hydrolysis of the pretreated solids. The hydrolysates obtained in these steps were separately subjected to fermentation with the yeast Pachysolen tannophilus ATCC 32691. Response surface methodology with two independent variables (temperature and reaction time) was applied for optimizing D-xylose production from the raw material by dilute acid pretreatment with 0.01 M sulfuric acid. The highest D-xylose yield in the liquid fraction was obtained in the pretreatment at 201 °C for 5.2 min. The inclusion of a detoxification step of the acid prehydrolysate, by vacuum distillation, allowed the fermentation of the sugars into ethanol and xylitol. The enzymatic hydrolysis of the pretreated solids was solely effective when using high enzyme loadings, thus leading to easily fermentable hydrolysates into ethanol. The mass macroscopic balances of the overall process illustrated that the amount of inoculum used in the fermentation of the acid prehydrolysates strongly affected the ethanol and xylitol yields.

Comprehensive morphological and structural investigation of cellulose I and II nanocrystals prepared by sulphuric acid hydrolysis

RSC Advances ◽  
2016 ◽  
Vol 6 (79) ◽  
pp. 76017-76027 ◽  
Author(s):  
Wilson Pires Flauzino Neto ◽  
Jean-Luc Putaux ◽  
Marcos Mariano ◽  
Yu Ogawa ◽  
Harumi Otaguro ◽  
...  
Keyword(s):  
Acid Hydrolysis ◽  
Sulphuric Acid ◽  
Structural Investigation ◽  
Wood Pulp ◽  
Cellulose I ◽  
Eucalyptus Wood ◽  
Hydrolysis Of Cellulose ◽  
Hydrolysis Of

CNCs were produced from eucalyptus wood pulp by (i) classical sulphuric acid hydrolysis, (ii) acid hydrolysis of cellulose previously mercerized by alkali, (iii) solubilization of cellulose in sulphuric acid and subsequent recrystallization in water.

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