Selectivity of hydrogenation in an alkyne-alkene system on palladium catalysts modified with inorganic salts

1984 ◽  
Vol 49 (3) ◽  
pp. 592-596 ◽  
Author(s):  
Libor Červený ◽  
Nguyen Thi Thanh ◽  
Vlastimil Růžička
Keyword(s):  
Activated Carbon ◽  
Calcium Carbonate ◽  
Potassium Chloride ◽  
Ammonium Chloride ◽  
Potassium Carbonate ◽  
Catalytic Hydrogenation ◽  
Palladium Catalysts ◽  
Inorganic Salts

The competitive catalytic hydrogenation of 2-octyne and 1-heptene in methanol has been studied on catalysts 3% Pd on activated carbon and Pd black, modified with ammonium chloride, potassium chloride, potassium carbonate, or calcium carbonate. The rates of hydrogenation of the two substrates and the rate of isomerization of 1-heptene have been determined. The effect of inorganic salts on the activity and selectivity of the catalysts is discussed.

Palladium catalyzed hydrogenation of biomass derived halogenated furfurals

RSC Advances ◽  
2016 ◽  
Vol 6 (105) ◽  
pp. 103149-103159 ◽  
Author(s):  
Elad Meller ◽  
Yoel Sasson ◽  
Zeev Aizenshtat
Keyword(s):  
Activated Carbon ◽  
Catalytic Hydrogenation ◽  
Palladium Catalysts ◽  
Supported Palladium Catalysts ◽  
Highly Efficient ◽  
Palladium Catalyzed ◽  
Supported Palladium

Highly efficient catalytic hydrogenation of halogenated furfurals to 5-methyl furfural over activated carbon supported palladium catalysts is demonstrated.

Activated Carbon by Potassium Carbonate Activation from Pine Sawdust ( Pinus montezumae Lamb.)

2020 ◽  
Vol 43 (9) ◽  
pp. 1716-1725
Author(s):  
Francisco Márquez-Montesino ◽  
Neil Torres-Figueredo ◽  
Adela Lemus-Santana ◽  
Fernando Trejo
Keyword(s):  
Activated Carbon ◽  
Potassium Carbonate ◽  
Pine Sawdust ◽  
Pinus Montezumae

scholarly journals Synthesis of Submicrometer Calcium Carbonate Particles from Inorganic Salts Using Linear Polymers as Crystallization Modifiers

2016 ◽  
Author(s):  
Sara E. Facchinetto ◽  
Tanize Bortolotto ◽  
Gabrielly E. Neumann ◽  
Jean C. B. Vieira ◽  
Bryan B. de Menezes ◽  
...  
Keyword(s):  
Calcium Carbonate ◽  
Inorganic Salts ◽  
Linear Polymers

Analysis of Physical and Chemical Features of Sintering Dust and Study of Recycling Treatment

2015 ◽  
Vol 768 ◽  
pp. 350-362
Author(s):  
Bin Pei ◽  
Guang Zhan ◽  
Zhan Cheng Guo ◽  
Jin Tao Gao
Keyword(s):  
Calcium Carbonate ◽  
Potassium Chloride ◽  
Sodium Carbonate ◽  
Calcium Sulfate ◽  
Sodium Carbonate Solution ◽  
Potassium Sulfate ◽  
Water Leaching ◽  
Leaching Experiment ◽  
Leaching Solution ◽  
Physical And Chemical

Several physical and chemical detection methods were used to study the basic properties of sintering dust collected from Baogang Steel Corporation. The result shows that the major constituents of the electrostatic precipitator dust (ESP dust) were KCl, NaCl, Fe2O3 and Fe3O4. Water leaching experiment on the sintering dust had shown that the KCl in the ESP dust could be separated and recovered by water leaching and fractional crystallization. Component analysis of leaching solution showed that the massive calcium sulfate in the leaching solution should be removed first in order to obtain the pure potassium salt. In order to provide theoretical guidance to inhibit the dissolution of calcium ions from the sintering dust, the water leaching experiment of ESP dust and the dissolution behavior of CaSO4 in the potassium chloride, sodium chloride, potassium sulfate and their mixed salt solution were studied. Result showed that, a lower liquid-solid ratio should be chosen in the leaching process to inhibit the dissolution of calcium sulfate dehydrate. Using sodium carbonate solution as a precipitating agent, the influences of the concentration of sodium carbonate solution, reaction temperature, stirring speed on the preparation of the spherical calcium carbonate were studied. Spherical calcium carbonate with good dispersing performance and grain size distribution in nanometer range of less than 10μm was obtained. The production technology of potassium sulfate by double decomposition was sutdied, the results showed that over 80% and 12.76% of the recovery rate of potassium sulfate and potassium chloride ammonium compound fertilizer could be obtained. Furthermore, a potassium recovery process with joint production of spherical calcium carbonate and potassium sulfate was designed. This process is technically viable and considerable in economic benefit.

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