In a process for the preparation of hydrochloric acid, which is free of the other halogens, fluorine, bromine and/or iodine, or hydrogen compounds and salts thereof, from a crude dilute hydrochloric acid, in pa
When dilute hydrochloric acid reacts with silver nitrate, a curdy white precipitate of silver chloride is obtained. It is insoluble in nitric acid but dissolves in excess of ammonium hydroxide due to the formation of a soluble complex, diammine silver chloride.AgNO3+HCl→AgCl↓+HNO3Reaction with ...
Hydrolysis Kinetics of Microcrystalline Cellulose Catalyzed by Fe3+ and Dilute Hydrochloric Acid[J]. Chemistry and Industry of Forest Products, 2012, 32(4): 117-122. [11] TANG F, LI Y Z, HUANG J W, et al. An Environmentally Friendly and Economical Strategy to Cyclically Produce Cellulose ...
Foam nickel with thickness of 2 mm was used as the substrate, cleaned by acetone, soaked and degreased in alkaline solution (60 g·L−1 NaOH, 15 g·L−1 NaPO4, 30 g·L−1 Na2CO3 and 5 g·L−1 Na2SiO3) and then soaked in 10% dilute hydrochloric acid to remove...
Galletti and co workers have recently studied the hydrothermal conversion of biomass materials: poplar saw dust, olive tree pruning and wheat straw to levulinic acid using dilute aqueous hydrochloric acid catalyst at 180–200 °C [4]. In these experiments they have obtained levulinic acid in 12...
The results indicated that the molecular weight of ACEP-Zn decreased significantly after the Zn complex reaction, which might be attributed to the use of dilute hydrochloric acid to regulate pH value during the complex reaction. As hydrochloric acid is a strong acid, part of the polysaccharide de...
观察洋葱表皮实验中碘液的配制(The preparation of iodine solution in onion skin experiment was observed) Not only saves time, but also avoids the disadvantages. 1., the preparation of salt dilute iodine solution (1) dissolve 0.2 g of iodine with 95% concentrated alcohol 70 g; (2) dissolve 0.9...
The turbid solution was acidified with dilute hydrochloric acid, filtered and then extracted three times, each with 200 ml of methylene chloride. The methylene chloride phases were combined, dried over magnesium sulfate and reduced to dryness. ...
(2) The isolated ethyl 5-diamino-1-substituted pyrazole-4-carboxylate is dissolved in methanol and hydrolyzed to the carboxyl compound by heating in the presence of 10% aqueous sodium hydroxide solution. Methanol is removed by distillation and the residue dissolved in dilute hydrochloric acid to pr...
Alternatively, the process can be accelerated by treatment of the compound of formula (II) with a dilute acid such as hydrochloric acid at room temperature, thereby effecting the deprotection of the amino ethanol, followed by reaction with a base at a temperature preferably between 50° C. and...