Adsorption studies of acetic acid dimers on activated charcoal from organic solvents

1994 ◽  
Vol 106 (4) ◽  
pp. 893-902
Author(s):  
J. Santhanalakshmi ◽  
S. Balaji ◽  
Thirumalaiswamy Raja
Keyword(s):  
Acetic Acid ◽  
Organic Solvents ◽  
Activated Charcoal ◽  
Adsorption Studies

Karakterisasi Komponen Aktif Asap Cair Cangkang Sawit Hasil Pemurnian

2016 ◽  
Vol 9 (1) ◽  
pp. 64-72
Author(s):  
Fauziati Fauziati ◽  
Eldha Sampepana
Keyword(s):  
Acetic Acid ◽  
Polycyclic Aromatic Hydrocarbon ◽  
Aromatic Hydrocarbon ◽  
Activated Charcoal ◽  
Oil Refining ◽  
Gas Chromatography Mass Spectrometry ◽  
Antioxidant Compounds ◽  
Active Components ◽  
Liquid Smoke ◽  
Polycyclic Aromatic

Palm shell liquid smoke obtained by pyrolysis and redestilasi still produce a pungent smoke flavor and color of yellow to brownish yellow so that the necessary research purification of smoke that can be used as ingredients other than preservatives, such as antiseptic hand wash. The research objective is to reduce the stinging liquid smoke aroma, color is tawny and to identify the characterization of the active components of liquid smoke shell oil refining results in Gas Chromatography Mass Spectrometry (GC-MS). The purification process of liquid smoke with redistilled at a temperature of 2000C and by adding 4.5% zeolite adsorbent made three (3) times the resulting liquid smoke of distillate and residue. Liquid smoke produced from distillate and residue are added activated charcoal as much as 9%, 10.5% and 12%, then stirred with a shaker subsequently allowed to stand for 6 days and 10 days The results of the study showed that liquid smoke purification results of the residue by the addition of activated charcoal as 12% and the time saved for 10 days (A2B2C3) gives flavor and color by 1.94 of 1.84 is odorless, yellowish white color and clarity. While the characteristics of the active components of purification results are predominantly acetic acid and phenol compounds of residues that serve as preservatives, antibacterial and antioxidant compounds while PAH (Polycyclic Aromatic Hydrocarbon), namely tar, benzoperen, gualakol and siringoll (aroma causes) undetectedABSTRAKAsap cair cangkang sawit yang diperoleh melalui proses pirolisis dan redestilasi masih menghasilkan aroma asap menyengat dan warna kuning hingga kuning kecoklatan sehingga diperlukan penelitian pemurnian asap yang dapat digunakan sebagai bahan lain selain pengawet, seperti antiseptik pencuci tangan. Tujuan penelitian adalah  untuk mengurangi aroma asap cair yang menyengat, warna yang masih kuning kecoklatan dan untuk  mengidentifikasi karakterisasi komponen aktif asap cair cangkang sawit hasil pemurnian secara Kromatografi Gas Spektrometri Massa (GC-MS). Proses  pemurnian asap cair dengan  redistilasi pada suhu 2000C dan dengan menambahkan adsorben zeolit 4,5% yang dilakukan sebanyak 3 (tiga) kali  dihasilkan asap cair dari Destilat dan Residu . Asap cair  yang dihasilkan dari destilat dan residu ditambahkan arang aktif sebanyak 9%,10,5% dan 12%  kemudian diaduk dengan shaker selanjutnya didiamkan selama 6 hari dan 10 hari .Hasil penelitian menunjukkan bahwa asap cair hasil pemurnian dari residu dengan penambahan arang aktif sebanyak 12% dan waktu simpan selama 10 hari ( A2B2C3 ) memberikan aroma sebesar 1,94 dan warna sebesar 1,84 adalah tidak berbau ,  warna putih kekuningan dan jernih . Sedangkan  karakteristik  komponen aktif hasil pemurnian yang paling dominan  adalah  senyawa acetic acid dan phenol  dari residu yang berfungsi sebagai bahan pengawet, antibakteri dan antioksidan sedangkan senyawa PAH (Polycyclic Aromatic Hydrocarbon) yaitu tar, benzoperen,  gualakol  dan siringoll ( penyebab aroma ) tidak terdeteksi . Kata kunci : asap cair, cangkang sawit, komponen aktif, pemurnian, redestilasi 

scholarly journals Dinuclear thiazolylidene copper complex as highly active catalyst for azid–alkyne cycloadditions

2016 ◽  
Vol 12 ◽  
pp. 1566-1572 ◽  
Author(s):  
Anne L Schöffler ◽  
Ata Makarem ◽  
Frank Rominger ◽  
Bernd F Straub
Keyword(s):  
Acetic Acid ◽  
Organic Solvents ◽  
Copper Complex ◽  
Room Temperature ◽  
Active Catalyst ◽  
Catalyst Design ◽  
Ancillary Ligand ◽  
Click Reactions ◽  
Highly Active ◽  
Cost Efficient

A dinuclear N-heterocyclic carbene (NHC) copper complex efficiently catalyzes azide–alkyne cycloaddition (CuAAC) “click” reactions. The ancillary ligand comprises two 4,5-dimethyl-1,3-thiazol-2-ylidene units and an ethylene linker. The three-step preparation of the complex from commercially available starting compounds is more straightforward and cost-efficient than that of the previously described 1,2,4-triazol-5-ylidene derivatives. Kinetic experiments revealed its high catalytic CuAAC activity in organic solvents at room temperature. The activity increases upon addition of acetic acid, particularly for more acidic alkyne substrates. The modular catalyst design renders possible the exchange of N-heterocyclic carbene, linker, sacrificial ligand, and counter ion.

Effect of organic solvents on the growth of TiO2 nanotubes: An insight into photocatalytic degradation and adsorption studies

2020 ◽  
Vol 37 ◽  
pp. 101491 ◽  
Author(s):  
Muhammad Zulfiqar ◽  
Sujan Chowdhury ◽  
Mohammad Fakhrul Ridhwan Samsudin ◽  
Ahmer Ali Siyal ◽  
Abdul Aziz Omar ◽  
...  
Keyword(s):  
Photocatalytic Degradation ◽  
Organic Solvents ◽  
Tio2 Nanotubes ◽  
Adsorption Studies ◽  
Insight Into

scholarly journals A Review of Pyrolisis of Eceng Gondok (Water hyacinth) for Liquid Smoke

2018 ◽  
Vol 73 ◽  
pp. 05010
Author(s):  
Rita Dwi Ratnani ◽  
Widiyanto
Keyword(s):  
Acetic Acid ◽  
Water Vapor ◽  
Activated Charcoal ◽  
Water Hyacinth ◽  
Combustion Process ◽  
Pyrolysis Process ◽  
Temperature Range ◽  
Liquid Smoke ◽  
16Th World ◽  
Co Gas

The growth of eceng gondok (Water hyacinth) in Rawa Pening Lake showed rapid increase.. Based on the mandate of the National Lake conference in Bali and the 16th World Lake Conference, Rawa Pening is one of the fifteen national lakes which need to be treated for its conservation. Reducing number of eceng gondok plants is one of the alternatif. However, further processing is required to treat the waste of eceng gondok. One attempt is to convert eceng gondok (water hyacinth) into liquid smoke product. This article reviewes the potency of eceng gondok for liquid smoke through pyrolisis method. The liquid smoke can be used for various applications such as preservatives, antioxidants, biopesticides and perisa disinfectants. Pyrolysis is a combustion process in the absence of oxygen to produce liquid and charcoal activated charcoal products called activated charcoal. The pyrolysis process is generally carried out at a temperature range between 200-700 °C. The pyrolysis process is one of the methods chosen in order to strive for development that suppresses the formation of CO gas but releases water vapor. Pyrolysis at a temperature of 300-700 ° C, produces the most dominant compounds 1.6 Anhyro-beta-d-glucopyranose, phenol, and acetic acid. The reaction that occurs during pyrolysis of this temperature is the release of water vapor instead of carbon gas so that it is safe for the environment. The discussion on this article focused on the production of liquid smoke from eceng gondok biomass.

STUDIES ON THE PITUITARY MELANOPHORE-EXPANDING HORMONE WITH REFERENCE TO ITS IDENTITY WITH ACTH

1954 ◽  
Vol 11 (1) ◽  
pp. 19-25 ◽  
Author(s):  
B. KETTERER ◽  
R. L. KIRK
Keyword(s):  
Acetic Acid ◽  
Filter Paper ◽  
Activated Charcoal ◽  
Fast Moving ◽  
Phosphate Buffer ◽  
Electrophoretic Pattern ◽  
Posterior Lobe ◽  
Major Peak ◽  
Alkaline Ph ◽  
Heat Treated

SUMMARY 1. A number of melanophore-expanding (B) extracts of the pituitary have been subjected to electrophoresis on filter-paper, and the resulting pattern of activity assayed, using Xenopus. At pH 7·2, in phosphate buffer, a simple extract of ox posterior lobe powder (OxPLP) shows the greatest range of mobilities. The faster moving components are absent from an acetone precipitated powder (APP), and also from OxPLP after treatment by heating in alkali. An ACTH preparation (Acton) had relatively more faster moving components with B activity than APP or alkali and heat-treated OxPLP. 2. There was no difference in the electrophoretic pattern of APP and alkali and heat-treated APP when examined in barbiturate buffer at pH 8·5. Under these conditions Acton showed a fast moving major peak of activity coincident with the ovalbumin spot. Acton also gave a faster moving component when run at pH 8·8 in barbiturate buffer than an alkali and heattreated OxPLP extract purified by adsorption to and elution from activated charcoal. 3. In acetate buffer all the extracts examined had an isoelectric point close to pH 4·8. 4. It is suggested that the melanophore-expanding activity of single acetic acid extracts of OxPLP is complex. Heating at a high pH for a few min destroys the components in this complex which show highest mobility at a slightly alkaline pH. The melanophore-expanding activity in Acton is probably largely identical with these heat unstable components.

Solubility of solid acetic acid in liquid organic solvents

1983 ◽  
Vol 28 (3) ◽  
pp. 328-330 ◽  
Author(s):  
Renzo Carta ◽  
Stella Dernini
Keyword(s):  
Acetic Acid ◽  
Organic Solvents

APPLICATION OF THE COATED CHARCOAL SEPARATION METHOD TO THE RADIOIMMUNOASSAY OF PLASMA CORTICOTROPHIN

1968 ◽  
Vol 41 (4) ◽  
pp. 499-508 ◽  
Author(s):  
R. A. DONALD
Keyword(s):  
Acetic Acid ◽  
Sensitivity And Specificity ◽  
Silicic Acid ◽  
Activated Charcoal ◽  
Acid Mixture ◽  
Factors Affecting ◽  
Reaction Proceeds ◽  
Subsequent Elution ◽  
Antigen Antibody ◽  
Radioimmunoassay Method

SUMMARY A radioimmunoassay method for plasma corticotrophin (ACTH) is described. ACTH is extracted from plasma by adsorption to silicic acid powder and subsequent elution by an acetone—acetic acid mixture. ACTH antiserum and 131I-labelled ACTH are added and the antigen-antibody reaction proceeds for 3 days. Activated charcoal coated with plasma is used to separate antibody-bound and unbound ACTH. Factors affecting the accuracy, sensitivity, and specificity of the assay have been assessed.

scholarly journals Adsorption of Cerium Ions on Activated Charcoal

1996 ◽  
Vol 13 (6) ◽  
pp. 519-525 ◽  
Author(s):  
Riaz Qadeer
Keyword(s):  
Activated Charcoal ◽  
Room Temperature ◽  
Adsorption Mechanism ◽  
Adsorption Studies ◽  
Ph Values ◽  
Cerium Ion ◽  
Isotherm Equations ◽  
Ion Species

Adsorption studies of cerium ions on activated charcoal were carried out as a function of pH at room temperature. The studies revealed that the maximum adsorption of cerium ions occurs at pH 4. An adsorption mechanism has been discussed in terms of the hydrolyzed cerium ion species formed in solution at different pH values. The data fit the Langmuir and Dubinin–Radushkevich isotherm equations and their corresponding constants were calculated.

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