dehydrogenation of c terpinene in a ball mill

Handbook on Oleoresin and Pine Chemicals (Rosin, Terpene ...

The stout short leaves are c. 5 10 cm long and occur in groups of threes on dwarf shoots. The male cones are visible during May June when pollination takes place. The cones are large hard and woody having reflexed triangular umbos. Each cone is 15 20 cm × 10 13 cm.. The seed is c. 2.5 cm long with a very short rudimentary wing.

Solvent-Free Transesterification in a Ball-Mill over ...

The present article reports on the solvent-free dehydrogenation of γ-terpinene (1) in a planetary ball mill affording p-cymene (2) as the predominant reaction product.

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The reaction temperature can vary from 120° up to 200°C, with a temperature range of 150°-180°C being preferred. At lower temperatures longer reaction times are required. In view of the nature of the catalyst used, the temperature of 120°-200°C gives rise to the use of pressures higher than atmospheric.

Increase in the Dehydrogenation Rate of Mg–CMC ...

Hydrogenation and dehydrogenation properties of MgH 2 were improved by combined nanoconfinement of carbon and catalysis roles. Roquefere et al. co-milled Mg 6 Pd and Fe in a high energy mill to improve the hydrogenation and dehydrogenation kinetics. They reported that the presence of iron greatly modifies the hydrogenation properties and the ...

Oxidative Dehydrogenation of Ethane Using Ball-milled ...

Abstract. Ball-milled hexagonal boron nitride (h-BN) involving oxidized boron on the surface was found to catalyze oxidative dehydrogenation of ethane with high selectivity to ethylene (92–96%) whereas pristine h-BN showed poor selectivity (42%). The calcination of the ball-milled h-BN at the temperature of 550 °C or higher resulted in the ...

Electronic Supporting Information Solvent-free ...

1 Electronic Supporting Information Solvent-free Dehydrogenation of γ-Terpinene in a Ball Mill: Investigation of reaction Parameters Tony Szuppa,a Achim Stolle,*a Bernd Ondruschkaa and Wieland Hopfeb a Institute for Technical Chemistry and Environmental Chemistry, Friedrich-Schiller University Jena, Lessingstraße 12, D-07743 Jena, Germany

Oxidative Dehydrogenation of Ethane Using Ball-milled ...

Ball-milled hexagonal boron nitride (h-BN) involving oxidized boron on the surface was found to catalyze oxidative dehydrogenation of ethane with high selectivity to ethylene (92–96%) whereas pristine h-BN showed poor selectivity (42%).

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Crusher Plant Supplier China. Sep 16, IH Drotts in the SE Davis & Son Collection of Vintage plant Drott Manufacturing Company was a manufacturer of industrial equipment, …

WO2016061585A1 - Polishing pads produced by an additive ...

Embodiments of the present disclosure relate to advanced polishing pads with tunable chemical, material and structural properties, and new methods of manufacturing the same. According to one or more embodiments of the disclosure, it has been discovered that a polishing pad with improved properties may be produced by an additive manufacturing process, such as a three …

Gamma-Terpinene - an overview | ScienceDirect Topics

Reaction parameters for oxidative dehydrogenation of γ-terpinene 9 to p-cymene 10 were studied in great detail by Stolle et al. (Scheme 6.4) [5].It was found that potassium permanganate is the most efficient oxidant in mechanochemical reaction.

[PDF] Scale-up of organic reactions in ball mills: process ...

The scale-up of the Knoevenagel-condensation between vanillin and barbituric acid carried out in planetary ball mills is investigated from an engineering perspective. Generally, the reaction proceeded in the solid state without intermediate melting and afforded selectively only one product. The reaction has been used as a model to analyze the influence and relationship of …

MgH2 Dehydrogenation Properties Improved by MnFe2O4 ...

Significantly Improved Dehydrogenation of Ball-milled MgH2 Doped with CoFe2O4 Nanoparticles. By Alex A Volinsky. Download pdf.

Enhancing hydrogen storage performance via optimizing Y ...

The dehydrogenation of Mg 2 NiH 0.3 into Mg 2 Ni when the decomposition of MgH 2 is complete, so the dehydrogenation process of Mg 2 NiH 0.3 will occur at a higher temperature: Mg 2 NiH 0.3 ↔Mg 2 Ni+H 2. The dehydrogenation temperature of YH 2 and YH 3 is generally around 790 °C and 400 °C, respectively [36,38].

ACSchem Learning Center

006 Solvent-free dehydrogenation of -terpinene in a ball mill: Investigation of reaction parameters 007 Biomimetic green chemistry 009 Biomimicry 010 Molecular biomimetics: Nanotechnology through biology 012 Green engineering …

Materials | Free Full-Text | Contamination Effects on ...

Effect of temperature and time on the (a) hydrogenation; and (b) dehydrogenation kinetics of nanocomposite MgH 2 /5.2TiC/4.6FeCr powders obtained after ball milling for 50 h. The dehydrogenation kinetics measured at 250 °C (open symbols) and 275 °C (closed symbols) after 5 min of desorption are presented in Figure 9c.

Oxidative Dehydrogenation - an overview | ScienceDirect …

Oxidative cracking prevails in the n-butane dehydrogenation with CO 2, and most of the products will be propylene and ethylene [154].So it is difficult to understand the role of CO 2 in the dehydrogenation process. Whatever the small promoting effects of CO 2 were observed on the other catalysts [143].Unlike the conversion of C-1–C-3 alkanes in the presence of CO 2, the …

Synthesis of Nopinone from β‐Pinene – A Journey Revisiting ...

The synthesis of nopinone from β‐pinene is an interesting model reaction for the investigation of methods for the oxidative cleavage of C=C bonds. Nopinone is used as chiral component for the total synthesis of different ligands or natural compounds such as di‐ or sesquiterpenes, as well as for the production of pharmaceutically active components. The …

Molecules | Free Full-Text | Advances in Fruit Aroma ...

Fruits produce a range of volatile compounds that make up their characteristic aromas and contribute to their flavor. Fruit volatile compounds are mainly comprised of esters, alcohols, aldehydes, ketones, lactones, terpenoids and apocarotenoids. Many factors affect volatile composition, including the genetic makeup, degree of maturity, environmental …

In-situ catalyzation approach for enhancing the ...

Dehydrogenation kinetics achieved at 250 °C and 275 °C for MgH 2 powders milled with Ni-balls milling media for different RBM time (12.5, 25 h, 50 and 100 h) are shown in (g) and (h), respectively.

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A last-ball victory over the Melbourne Stars will all but see the Perth Scorchers book the first spot in the WBBL final with one match to play on Sunday. Taneale Peschel hit the winning single off the last ball of the match, Perth needing nine off the final over. But the match could have been sent ...

Green Solvents Fundamental and Industrial Applications ...

Szuppa T, Stolle A, Ondruschka B, Hopfe W (2010) Solvent-free dehydrogenation of γ-terpinene in a ball mill: investigation of reaction parameters. Green Chem 12:1288–1294 CrossRef Google Scholar 63.

production process of acetone - szkolka-kontra.pl

Production of Acetone Using Catalytic Dehydrogenation of. The production of acetone is 34.82 kmol/h from a process feed of 34.82 kmol/h of isopropanol, representing an overall conversion of approximate ly . The reactor feed consists of this process feed plus a recycle stream with approximately 3.8 kmol/h of isopropanol.

A Green Synthesis and Antibacterial Activity of N ...

Abstract. A green method has been developed for the synthesis of N-arylsulfonylhydrazones via a simple grindstone procedure.By grinding mixtures of benzensulfonyl hydrazides and a series of aryl aldehydes or ketones in the mortar using L-tyrosine as catalyst, 24 N-arylsulfonylhydrazones were synthesized in a few minutes with high yield.All compounds …

Gamma-Terpinene - an overview | ScienceDirect Topics

Reaction parameters for oxidative dehydrogenation of γ-terpinene 9 to p-cymene 10 were studied in great detail by Stolle et al. (Scheme 6.4) [5]. It was found that potassium permanganate is the most efficient oxidant in mechanochemical reaction.

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Solvent-free dehydrogenation of γ-terpinene in a ball mill ...Contrary to particle refinement processes the size of the milling balls d ... a planetary ball mill Pulverisette 7 Fritsch Idar-Oberstein Germany for ... of experiments with one milling ball is …

Speed-up your synthesis lab: Planetary ball mills as a ...

Ball Mills afforded some precautions since azides are in general shock-sensitive materials. ... dehydrogenation of γ-terpinene to -cymene [p 10] and the oxidative cleavage of β-pinene affording nopinone [11]. Especially the last example proved to be a real alternative for

US3387053A - Dehydrogenation catalyst and process - Google ...

US3387053A US507514A US50751465A US3387053A US 3387053 A US3387053 A US 3387053A US 507514 A US507514 A US 507514A US 50751465 A US50751465 A US 50751465A US 3387053 A US3387053 A US 3387053A Authority US United States Prior art keywords catalyst oxide promoter iron oxide weight Prior art date Legal status …

The Suzuki−Miyaura Reaction under Mechanochemical ...

As a model for a C−C-coupling procedure a Suzuki−Miyaura reaction has been studied under mechanochemical conditions. Important parameters influencing the yield of the reaction are the revolutions per minute, the milling time, and the material of the milling balls and beakers, as well as the size and number of milling balls.

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It may be derived biogenetically from a C 20 quassinoid via a 1,2-dioxo derivative by oxidative bond cleavage between C-l and C-2, decarboxylation, contraction of ring B, and formation of the oc,fJ-unsaturated y-lactone [25]. 52 Ailanthus altissima (Mill.)

BJOC - Heterogeneous photocatalysis in flow chemical reactors

The CMB-C 3 N 4 is formed of cyanuric acid (C), melamine (M), and 5 mol % barbituric acid (B), which is calcined to yield the modified g-C 3 N 4 with heterojunctions formed in situ. CMB-C 3 N 4 has been shown to be superior to g-C 3 N 4 and mesoporous g-C 3 N 4 (mpg-C 3 N 4 ) in the photocatalytic hydrogen evolution reaction due to a better ...

Speeding Up Your Organic Synthesis with Ball Mills

a milling material: agate, 20 min, 800rpm ≙ 13.3 Hz. b 20 min at 20 °C with maximal power input. c 60 in at 80 °C. d 30 min at 80 °C, maximal power input = 300 W.. The effective transfer of energy from the power socket into a product of interest has been proven for a number of examples. When different ball mills are compared with respect to their gross power …