Darstellung von Tetraioddiborylmethan

Siebert, Walter; Ender, U.; Schütze, Reinhard

doi:10.1515/znb-1985-0725

Cited by 7 publications

(2 citation statements)

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“…Die hierfür benötigten 1,1‐Bis(chlororganoboryl)methane sind literaturbekannt und wurden aus Tetrachlordiborylmethan und Tetraorganozinnderivaten synthetisiert 10. Die Gewinnung des Diborylmethans aus dem schlecht zugänglichen CH 2 (AlCl 2 ) 2 und BCl 3 im Autoklaven unter hohem Druck lieferten jedoch nur geringe Umsätze 11. In Ermangelung einer geeigneten Autoklavenstation sowie aus Sicherheitsgründen wurde für die Borverbindungen ein alternativer Zugang erarbeitet (Schema 5).…”

Section: Ergebnisse Und Diskussionunclassified

1,2‐Diaza‐3,5‐diborolidine CH₂BR¹‐(NR²)₂‐BR¹: Potentielle Vorstufen zu cyclischen Diborylcarben‐Liganden

Weber

Förster

Stammler

et al. 2011

Zeitschrift anorg allge chemie

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The reaction of the aminohaloboranes (Me 2 N)(R)BX (1) (a: R = Ph, X = Cl; b: R = Me, X = Br; c: R = iPr, X = Cl) with the di-Grignard reagent (BrMg) 2 CH 2 in ethyl ether/benzene mixtures afforded the diborylmethanes [(Me 2 N)(R)B] 2 CH 2 (2) (a: R = Ph; b: R = Me; c: R = iPr), which were subsequently converted into the corresponding bis(chloroboryl)methanes [(Cl)(R)B] 2 CH 2 (3) (a: R = Ph; b: R = Me; c: R = iPr). Base-assisted cyclocondensation of 3a-c with 1,2-diisopropylhydrazine afforded 1,2-diisopropyl-1,2-diaza-3,5-diorgano-3,5-diborolidines (4) (a: R = Ph; b: R = Me; c: R = iPr). Derivative 4a was deprotonated by potassium bis(trimethylsilyl)amide to give (1,2diisopropyl-1,2-diaza-3,5-diphenyl-3,5-diborolidinyl)potassium (5).

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Section: Ergebnisse Und Diskussionunclassified

1,2‐Diaza‐3,5‐diborolidine CH₂BR¹‐(NR²)₂‐BR¹: Potentielle Vorstufen zu cyclischen Diborylcarben‐Liganden

Weber

Förster

Stammler

et al. 2011

Zeitschrift anorg allge chemie

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“…Studies conducted on over 20,000 proportional-integral-derivative (PID) control loops revealed that the majority of the control loops had oscillations and the oscillations in 20 to 30% of these loops were engendered by control valve stiction. [3][4][5][6] Valve stiction is an equipment fault which impedes the free movement of the valve stem, negatively impacting the performance of a control loop. In spite of the fact that intrusive techniques can precisely detect sticky control valves, they are not popular in practice because their application interrupts running plants.…”

Section: Introductionmentioning

confidence: 99%

Control valve stiction detection using Markov transition field and deep convolutional neural network

Memarian,

Damarla,

Huang

2023

Can J Chem Eng

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Control valve stiction is an industrial problem that often causes oscillations in process control loops. Oscillating control loops are not capable of maintaining key process variables near or at their desired values, thus yielding low‐quality products, inducing economic loss, and increasing environmental impacts. Therefore, it is of vital importance to detect stiction in industrial control valves. In this regard, the present work proposes a new method based on the Markov transition field and convolutional neural network (CNN) to identify sticky control valves in industrial control loops. The Markov transition field is employed to convert process variable (PV) and controller output (OP) into two‐dimensional images, which are then utilized by CNN to learn to distinguish stiction induced oscillations from oscillations brought out by a non‐stiction condition. A transfer learning strategy is adopted to improve the stiction detection capability of the proposed method. Its performance is evaluated via its application to benchmark control loops taken from the chemical, paper, mining, and metal industries. Results demonstrate that the proposed method obtains the correct verdict for the majority of the control loops studied.

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From Boron Halides

Wrackmeyer¹

1989

Inorganic Reactions and Methods

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Darstellung von Tetraioddiborylmethan

Abstract: Abstract Reaction between BCl3 and CH2(AlCl2)2 leads to tetrachlordiborylmethane, which reacts with BI3 to give tetraioddiborylmethane in 64% yield.

Cited by 7 publications

References 0 publications

1,2‐Diaza‐3,5‐diborolidine CH₂BR¹‐(NR²)₂‐BR¹: Potentielle Vorstufen zu cyclischen Diborylcarben‐Liganden

1,2‐Diaza‐3,5‐diborolidine CH₂BR¹‐(NR²)₂‐BR¹: Potentielle Vorstufen zu cyclischen Diborylcarben‐Liganden

Control valve stiction detection using Markov transition field and deep convolutional neural network

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Darstellung von Tetraioddiborylmethan

Abstract: Abstract Reaction between BCl3 and CH2(AlCl2)2 leads to tetrachlordiborylmethane, which reacts with BI3 to give tetraioddiborylmethane in 64% yield.

Cited by 7 publications

References 0 publications

1,2‐Diaza‐3,5‐diborolidine CH2BR1‐(NR2)2‐BR1: Potentielle Vorstufen zu cyclischen Diborylcarben‐Liganden

1,2‐Diaza‐3,5‐diborolidine CH2BR1‐(NR2)2‐BR1: Potentielle Vorstufen zu cyclischen Diborylcarben‐Liganden

Control valve stiction detection using Markov transition field and deep convolutional neural network

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1,2‐Diaza‐3,5‐diborolidine CH₂BR¹‐(NR²)₂‐BR¹: Potentielle Vorstufen zu cyclischen Diborylcarben‐Liganden

1,2‐Diaza‐3,5‐diborolidine CH₂BR¹‐(NR²)₂‐BR¹: Potentielle Vorstufen zu cyclischen Diborylcarben‐Liganden