rotavapor thf

Chemistry Laboratory

Buchi Rotavapor R-215. Buchi R-215 Rotavapor unit in the chemistry lab is used to evaporate solvents. Each unit is coupled with a single Buchi V-700 self-clean pump and a Buchi B-491 Heating Bath. Rotavapor R-215 can rotate samples …

Why you should avoid grease in your rotavapor with a …

2021-9-8 · Sure, polar solvents, such as THF, diethyl ether, DME or dioxane are less likely to dissolve grease, but non-polar hydrocarbon solvents, such as pentane, hexane and petroleum ether and halogenated solvents, such as DCM readily dissolve grease. Grease in your system is then problematic due to several reasons. – Grease leads to cross contamination,

Rotavapor® R-300 | Buchi

2022-4-15 · The Rotavapor® R-300 meets the highest expectations of convenience and versatility in rotary evaporation. Its modular design allows the R-300 to be extended to a fully integrated system where a central interface regulates each component. Evaporating flask size: 50 – 5000 mL. Lift mechanism: Manual or automatic. Temperature range: 20 – 220 °C.

Survey data on thermal properties of different

2019-8-1 · During nanocomposites manufacturing, the HBPs were dissolved in a proper solvent (THF for HBPG and, dimethylformamide for HBPR) and the solutions were mixed with the epoxy resin. Solvent was removed by rotavapor (80 °C for 30 min) and the system was poured in an aluminum mould: the loaded resin was cured according to RTM6 [2] temperature

Polymer Chemistry - RSC Publishing Home

1,20-Eicosanediol. 10 g (29.24 mmol) of 1,20-eicosanedioic acid was dissolved in 150 ml of hot THF and dry-nitrogen was purged through the solution. 4.4 g (58.48 mmol) of borane-dimethyl sulfide was added drop-wise and the reaction mixture was stirred overnight. 4N HCl was added to the reaction mixture and THF was removed using a rotavapor.

Self-assely of vesicles from the - ScienceDirect

2009-12-19 · The mixture was stirred at rt for 0.5 h and then concentrated with a rotavapor. The resulting oily residue was dissolved in THF (20 mL) and the solution was cooled to −10 °C. Then, under stirring, to this solution was added a solution of di-n-octyl amine (6.00 mL, 19.8 mmol) and triethylamine (6.00 mL, 43.2 mmol) in THF (20 mL

Stability Versatile Approach to Polyelectrolyte Multilayer

2017-11-3 · units, 1 eq.), THF (1mL) and allylbromide (50 mg, 36 L, 0.41 mmol, 0.20 eq.) were added. The rereaction mixture was stirred overnight at room temperature and THF was removed by rotavapor under reduced pressure. Finally, 3 mL of 0.1 M HCl solution was added followed by water liophilization.

A facile asymmetric synthesis of (s)-14-methyl-1

2013-5-7 · The THF was recovered on a rotavapor and the residue was extracted with ethyl acetate (100 mL × 3). The coined organic extracts were dried (MgSO 4 ), concentrated in vacuo , and chromatographed (15–25% gradient, EtOAc-hexane) to provide 7.5 g (66%) of pure 9 as a colorless oil.

【】PEG - - -

2009-3-29 · rotavapor. The product finally reprecipitated in cold diethyl ether. The product was dried in vacuo overnight. Yield: g, 88% Three columns from Supelco (G6000-4000-2000 HXL) were used with THF as the eluent. The columns were calibrated with monodisperse

Electronic Coupling between Two Covalently Bonded

2019-5-25 · (0.76 g, 0.02 mol) suspended in 30 mL of THF was transferred slowly to a solution of 2,6-dimethylnaphthalenecarboxylate (4) (2.44 g, 0.01 mol) in 50 mL of THF. The mixture was stirred for 30 min at low temperature and then at room temperature for another 30 min. The reaction was refluxed at 70 oC for 24 h. The

How to use a Rotary Evaporator - University of …

2010-4-1 · General rules for usage of a rotary evaporator General rules for usage of rotary evaporators 1. The solvent collection flask of the unit should always be emptied prior use to prevent accidentally mixing of incompatible chemicals. …

Synthesis and characterization of polymer supported Fe

2019-8-15 · The solvent THF was evaporated by rotavapor under vacuum. The resulting dark brown viscous crude was mixed with 150 ml CHCl 3 and washed with deionized water (5 × 150 ml) to remove the traces of the salt. The trace of moisture was removed using Na 2 SO 4 and CHCl 3 layer was separated.

Supporting Information - American Chemical Society

2019-5-26 · The rotavapor was BUCHI’s Rotavapor R-3. Amides were easily synthesized from acyl chlorides and 8-aminoquinoline. ⅠGeneral procedure for substrates Anhydrous THF and LDA (2.2 equiv) were added to a round-bottomed flask cooled to -15 oC under nitrogen atmosphere. 1.0 equiv acid was added and the mixture was

Synthesis and use of a surface-active initiator in …

Removal of THF solvent on a rotavapor provided a white mixture of solid and liquid as the crude product 1. Most of the crude 1 was neutralized with aqueous sodium bicarbonate to give a clear colorless solution, which was used directly …

BUCHI_R210.pdf - BOOK118

2017-7-9 · PBT: Rpm: / 6 R-210/215 ,A 2 2 ,、。. ,。. ,

A new synthesis of 3-alkyl-1-isoindolinones - ScienceDirect

2002-12-9 · After removing the THF with a rotavapor in vacuo, the residue was purified under vacuum, removing HMPA with a Kugelrohr apparatus, to give a crude solid. This was purified by a silica gel chromatographic column (ethyl acetate/n-hexane=1/1) to give pure, colorless crystals of 2a (77%), 10 2b (75%), 11 2c (77%), 12 2d (76%), 13 and 2e (78%), 11

What is the best method of removing solvents like …

You should install a cold trap between the pump and the rotary evaporator. Use acetone and dry ice (solid CO2) in the dewar vessel of the cold trap. This will create a temperature around - 78C,

Toxlab HCI D312 - ETH Z

Hoods for dangerous reactions: standard hood, hood for acids with exhauste air washing, standard hood with rotavapor, hood for HF and fluorine. Solvent drying system for n-hexane, toluene, 1,4-dioxane, acetonitrile, dichloromethane, THF, DMF, and Et 2 O.

What Recommended Pressure and Temperature of Rotary …

2022-4-13 · With a rotary evaporator you need to be careful about the mechanical (shear force) damage to your samples, especially proteins, or that caused by foaming. Foam is bad! Centrifugal evaporators can

Generation of highly amenable - Scientific Reports

2021-1-15 · Interestingly, the DE-THF pretreated cellulose showed remarkable enzymatic hydrolysability, despite an increase in its crystallinity to 72.3%.

Supplementary Information dendritic cell based DNA

2019-3-26 · THF was removed with rotavapor and the residue was dissolved in ethyl acetate. Decolorizing carbon was added to the ethyl acetate solution and the mixture was filtered. Solvent from the filtrate was evaporated and the residue upon column chromatography over 60-120 mesh size silica gel using 1.5% methanol in

Rotavapor® R-250 Pro | Buchi

2022-4-15 · Rotavapor® R-250 EX. Safety comes first! Especially when it comes to the Rotavapor® R-250 EX! The EX-protection is designed to fulfill the harshest working environment needs. Experience the highest safety level of industrial distillation with a flask size of up to 50L.

Rotary Evaporator Only Information

2018-10-13 · 3 temperatures, but it is a general recommendation to help give an idea of the temperatures for the rotary evaporator. Many manufacturers do not recommend a water bath temperature higher than 60 degrees Celsius, but

Lignin nanoparticles modified with tall oil fatty acid for …

2019-10-3 · Thereafter, the main part of THF was evaporated using rotavapor, and finally the TLNP suspension was dialysed using a merane with cut-off 3500 Da. The final concentration of lignin nanoparticles in water suspension was 1 mg/ml. The overall yield of TLNPs was approximately 100%. The unconjugated Lignoboost lignin nanoparticles with sizes 300

Experimental Section General

2019-5-26 · a B chi rotavapor. Polyethylene glycol monobenzyl ether MW 600 (3a). To a suspension of potassium hydride (580 mg, 14.5 mmol, 1.06 eq.) in degassed THF (125 mL) was added 2-benzyloxyethanol 2 (2.09 g, 13.7 mmol, 1 eq) and stirred for 4 h. The solution was degassed by three freeze-pump-thaw cycles, then ethylene oxide (7.84 g, 178 mmol, 13


2010-7-7 · on a rotavapor. The product was further purified by column chromatography (with basic aluminum oxide, activated, Aldrich, Brockmann I, standard grade, 150 mesh) with 80 mL of dry tetrahydrofuran (THF). Re-moval of the THF on a rotavapor gave a light yellow oil. The viscous oily product weighed 21.8 g (86.0%). 1H NMR (CDCl 3

Buchi 20/40/60 rule for Rotary Evaporators

2015-6-6 · Solvent Acetic acid Acetone Acetonitrile n-Amylalcohol, n-Pentanol n-Butanol tert-Butanol, 2-Methyl-2-Propanol Butylacetate Chlorobenzene Chloroform


2010-7-7 · on a rotavapor. The product was further purified by column chromatography (with basic aluminum oxide, activated, Aldrich, Brockmann I, standard grade, 150 mesh) with 80 mL of dry tetrahydrofuran (THF). Re-moval of the THF on a rotavapor gave a light yellow oil. The viscous oily product weighed 21.8 g (86.0%). 1H NMR (CDCl 3