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BUCHI : Instruction Manual - ManualShelf

BUCHI : Instruction Manual - ManualShelf

BÜCHI Labortechnik AG Appendix | 10 10 Appendix 10.1 Solvent table Solvent Formula Molar Evaporation en­ Boiling mass in g/ ergy in J/g point in °C mol at 1013 mbar Density in Vacuum in g/cm3 mbar for 40­ °C boiling point Acetone CH3H6O 58.1 553 56 0.790 556 n­Amyl alcohol, n­pentanol C5H12O 88.1 595 37 0.814 11 Benzene C 6H 6 78.1 548 .

Demethylation of Methyl Ethers - Hydrobromic Acid (HBr)

Demethylation of Methyl Ethers - Hydrobromic Acid (HBr)

The solid material was scooped out of the filter and dried in vacuo (40 C, 10-25 mbar, rotovap) to provide the product as a white, crystalline solid. [2.609 kg, 6.846 mol, 86%] [Patent Reference: WO2015089361, page 76, (5.2 )]

Orgo Lab Exam 2 Flashcards | Quizlet

Orgo Lab Exam 2 Flashcards | Quizlet

A cycloaddition reaction: A 1,4-addition of a: 1,3-diene (conjugated diene) and an alkene (dienophile) - to form a new six membered ring.

What is a Rotovap used for? - Lab Instrument Manufacturer

What is a Rotovap used for? - Lab Instrument Manufacturer

A rotary evaporator (Rotovap) is a piece of machinery or equipment used in the creation of some cannabis concentrates. A rotary evaporator evaporates and recovers pricey ethanol from ethanol-extracted concentrates. Rotary evaporators are one of the key steps in creating butane hash oil (BHO) and other cannabis concentrates.

C251.03 Lab -- Frontalin Project

C251.03 Lab -- Frontalin Project

Dry and rotovap the combined ether layers and see if you get anything. Be careful not to heat the flask when rotovapping, and don't over rotovap, since your product is fairly volatile. 4/7/03 -- One group that tried the distillation procedure obtained about the same amount of material as the groups that used the Dean-Stark method (approximately .

Demethylation of Methyl Ethers - Hydrobromic Acid (HBr)

Demethylation of Methyl Ethers - Hydrobromic Acid (HBr)

Example 2. To a 50 L jacketed glass reactor fitted with an N2 inlet and a mechanical stirrer was added AcOH (17.50 L, 7.0 vol) and the SM (2.500 kg, 7.956 mol). The mixture was stirred. A solution of HBr in AcOH (5.853 kg, 3.928 L of 33% w/w, 23.87 mol) was added, resulting in a mild exotherm and a light amber solution. The solution became a darker amber color as more HBr was added.

Synthesis of dipeptide - Treatment of N-(1,Z .

Synthesis of dipeptide - Treatment of N-(1,Z .

Amount of crude product collected after using the rotovap Mass of ST19 100mL RBF (g) 63.28 Mass of ST19 RBF + crude product (g) 68.78 Mass of crude product (g) 5.50 Table2. Amount of pure product collected after recrystallization Mass of 50mL beaker (g) 28.795 Mass of 50mL beaker + pure product (g) 29.600 Mass of pure product (g) 0.579 Table3.

valve - Laboratory consumable - Verrerie Villeurbannaise

valve - Laboratory consumable - Verrerie Villeurbannaise

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Increase your distillation efficiency

Increase your distillation efficiency

Benzene C 6 H 6 162 n-Amylalcohol, n-pentanol C 5 H 12 O 6 n-Butanol C 4 H 10 O 14 tert-Butanol, 2-methyl-2-propanol C 4 H 10 O 78 Chlorobenzene C 6 H 5 Cl 22 Chloroform CH Cl 3 332 Cyclohexane C 6 H 12 154 Dichloromethane, methylene chloride CH 2 Cl 2 699 Diethylether C 4 H 10 O 838

JP3206004B2 - Improved high refractive index ophthalmic .

JP3206004B2 - Improved high refractive index ophthalmic .

JP3206004B2 JP50054897A JP50054897A JP3206004B2 JP 3206004 B2 JP3206004 B2 JP 3206004B2 JP 50054897 A JP50054897 A JP 50054897A JP 50054897 A JP50054897 A JP 50054897A JP 3206004 B2 JP3206004 B2 JP 3206004B2 Authority JP Japan Prior art keywords copolymer intraocular lens monomer acrylate according Prior art date 1995-06-07 Legal status (The legal status is an .

Supporting Information Synthesize Phenoxazines and .

Supporting Information Synthesize Phenoxazines and .

The solvent was removed on a rotovap and the residue was purified by column chromatography to give the product 5a-b. General Procedure 4: Synthesis of 1,4-Bis(10-phenothiazinyl)benzene (Compound 5c). Bis(2-bromophenyl)sulfide4 (1.2 mmol) and 1,4-benzendiamine 2t (0.6 mmol), NaOtBu

Extraction and Evaporation

Extraction and Evaporation

Duisberg knew that a hydroxyl (OH) group attached to a benzene ring is characteristic of many toxic substances (for example phenol), so he decided to "mask" the hydroxyl group in para-aminophenol with an ethyl group as shown in Figure 2. . Using the rotovap to remove the dichloromethane is a common technique which we will use throughout

How would you separate a mixture of benzoic acid, phenol .

How would you separate a mixture of benzoic acid, phenol .

All three compounds dissolve in organic solvents (like dichloromethane or diethyl ether) better than in water. However, benzoic acid is the most acidic compound among them, it can react with bicarbonate ion. Phenol is less acidic than benzoic acid.

Evaporation of organic solvent and leftover residue .

Evaporation of organic solvent and leftover residue .

Apr 20, 2009 · I have a question about evaporation of organic solvents and the leftover sample after this is done. (sample dissolved in the organic solvent) Does the sample, leftover after the evaporation of a organic solvent, (used to dissolve the sample) affect the analysis of the dry sample?

Nitration of Bromobenzene by Electrophilic Aromatic .

Nitration of Bromobenzene by Electrophilic Aromatic .

rotovap. Do not evaporate to dryness. 1. Assemble apparatus as described. We will essentially follow the procedure in the book. 6. Filter the slurry from the rotovap and rinse the crystals before drying. Do not combine with the 1st crop of crystals until you have confirmed purity by TLC. 7. Concentrate mother liquor prior to column chromatography.

Can't Buy These Thrills | In the Pipeline

Can't Buy These Thrills | In the Pipeline

May 23, 2006 · Back in the 1960-70s when I was a young chemist in the lab, the oldtimers bemoaned the increasing emphasis on lab safety and all these worries about carcinogens etc. Mind you, being still young and immortal, we were still able to be standing at the hood with a burning cigarette hanging from our lips and shaking the sep funnel while we did the ether extractions.

Acylation lab - WriteWork

Acylation lab - WriteWork

The experiment implemented gentle reflux, extraction, rotovap, and H1 NMR/ IR spectrum analysis. The experiment yielded an oily, clear substance weighing 0.221 grams (14.7% recovery). The H1 NMR spectrum showed a 1:1 ratio between Ha and Hd, verifying the reaction took place; there were hydrogens present from both anisole and acetic anhydride .

Indian Patents. 209091:QUINOLINE AND QUINOXALINE .

Indian Patents. 209091:QUINOLINE AND QUINOXALINE .

INTERMEDIATE EXAMPLE 1 4-Bromo-5-methoxy-benzene-1.2-diamine dihydrochloride To a solution of EtOAc (50 mL) and 5-bromo-4-methoxy-2-nitro-phenylamine (2.5 g, 10 mmol) under argon is added 5% Pd/C (0.5 g). The reaction mixture is hydrogenated at 50 psi for 1 hour.

Pressure-Temperature Nomograph Interactive Tool | Sigma .

Pressure-Temperature Nomograph Interactive Tool | Sigma .

Calculate a boiling point or pressure using the Antoine Equation: The Pressure-Temperature Nomograph is a graphical application of the Clausius-Clapeyron Equation, which assumes the heat of vaporization is a constant over a pressure range.

Molbank 2006 - MDPI

Molbank 2006 - MDPI

The organic solvents were removed with the rotavap to yield 9.027 g (36.80 mmoles) 1-nitro-3-(phenylthio)methyl]benzene, 1, as a dark-yellow viscous liquid. The percent yield for this reaction was 92%. This product was used without further purification in the next reaction.

Azeotropic Data for Binary Mixtures

Azeotropic Data for Binary Mixtures

-4-AZEOTROPIC DATA FOR BINARY MIXTURES (continued) Molecular formula Name taz/°C x1 2-Butanol C4H10O C6H6 Benzene 78.5 0.161 C7H16 Heptane 88.1 0.439 Diethyl ether C4H10O C5H12 Pentane 33.7 0.553 tert-Butyl alcohol C4H10O C6H6 Benzene 74.0 0.378 C7H16 Heptane 78 0.688 Methyl propyl ether C4H10O C5H12 Pentane 35.6 0.215 2-Ethoxyethanol C4H10O2 C7H16 Heptane .

Diazepam (Valium) Synthesis

Diazepam (Valium) Synthesis

5-Chloro-N-methyl-isatoic anhydride[1,2] . The pyridine was removed as completely as possible on a rotovap, and the residue taken up in an etheral solution of 3% HCl, the layers were separated, and the ether layer was extracted three more times with 3% HCl. . mp 150-160°C) remaining in the funnel was washed with benzene and petroleum ether .

Extraction of Benzoic Acid - Odinity

Extraction of Benzoic Acid - Odinity

Dec 31, 2017 · The methyl orange in this case is nonpolar so it remains dissolved in the organic layer. Once we had completely removed and separated the aqueous layer, NaOH was once again added to complete any separation that may not have occurred the first time. The benzoic acid still remains in the organic layer and repeating the addition of NaOH and .

News – tagged

News – tagged "Rotovap" – PolyScience Culinary

Tags: Recipe, Reduction, Rotovap, Sauces; Distilled Habanero. Posted Aug 30, 2017 by PolyScience Staff . Habanero chiles are also extremely spicy. Through distillation, we remove capsaicin, the compound that gives peppers their heat. This non-volatile compound cannot be distilled, so the habanero has all the aroma and much of the flavor of a .

Lignin-methyl methacrylate polymer as a hydrophobic .

Lignin-methyl methacrylate polymer as a hydrophobic .

In this work, the modification of lignin (KL) with methyl methacrylate (MMA) is presented via free-radical polymerization in the presence of potassium.

Biodegradation of Coproducts of Commercial Linear .

Biodegradation of Coproducts of Commercial Linear .

A type I C12 iso-LAS (i.e., methyl branching on the nonbenzylic carbon atoms at various positions on the aliphatic chain) was prepared by the alkylation of benzene with an iso-alcohol in an excess of A1C13 This iso-alcohol was a mixture with hydroxyl groups alpha to methyl groups and with each vicinal OR and CH3 pair at different positions .

Supporting Information Synthesize Phenoxazines and .

Supporting Information Synthesize Phenoxazines and .

The solvent was removed on a rotovap and the residue was purified by column chromatography to give the product 5a-b. General Procedure 4: Synthesis of 1,4-Bis(10-phenothiazinyl)benzene (Compound 5c). Bis(2-bromophenyl)sulfide4 (1.2 mmol) and 1,4-benzendiamine 2t (0.6 mmol), NaOtBu

Indian Patents. 209091:QUINOLINE AND QUINOXALINE .

Indian Patents. 209091:QUINOLINE AND QUINOXALINE .

INTERMEDIATE EXAMPLE 1 4-Bromo-5-methoxy-benzene-1.2-diamine dihydrochloride To a solution of EtOAc (50 mL) and 5-bromo-4-methoxy-2-nitro-phenylamine (2.5 g, 10 mmol) under argon is added 5% Pd/C (0.5 g). The reaction mixture is hydrogenated at 50 psi for 1 hour.

Butyl acetate - Wikipedia

Butyl acetate - Wikipedia

n-Butyl acetate, also known as butyl ethanoate, is an ester that is a colorless, flammable liquid at room temperature. It is found in many types of fruit, where along with other chemicals, it imparts characteristic flavors and has a sweet smell of banana or apple.

Variations in the structure and reactivity of thioester .

Variations in the structure and reactivity of thioester .

While being stirred vigorously, tetrabromomethane (23.37 g, 70.5 mmol) was added slowly. After the addition, the mixture was stirred for 2 h and the CH 2 Cl 2 was removed on a rotovap. The residual white paste was broken up and stirred with hexane (100 mL) and filtered into a round-bottom flask (250 mL). The hexane was removed on a rotovap.