Month: November 2022

Lozano, Hugo; Trauffer, Edward A. published an article in 2000, the title of the article was Re-generable H2S scavenger.Synthetic Route of 4719-04-4 And the article contains the following content:

A novel way has been developed to utilize a proprietary catalyst incorporated into the liquid scavenging chem., called ENVIRO-TEK, to regenerate the spent chem. The regeneration is accomplished with air. This technol. innovation has dramatically reduced the cost of removing sulfur from several gas streams. The chem. of the process may be summarized as: REACTION 1 (contactor): triazine (1,3,5-tri(2-hydroxyethyl)hexahydro-s-triazine) + H2S ———-> dithiazine (5,6-dihydro-5-(2-hydroxyethyl)-4H-1,3,5-dithiazine) REACTION 2 (regeneration tank): dithiazine + O2 + catalyst —-> triazine + S0 + H2O. Single use triazine based liquid scavengers have been widely and successfully used in the natural gas industry for a long time to remove small amounts of H2S. The global natural gas industry is projected to spend more than $60 million/yr on chem. scavenging operating costs. However operators have been reporting difficulties in obtaining acceptable H2S removal costs and performance. The process utilizes a scrubbing tower or in line injection to contact the ENVIRO-TEK with the sulfur bearing gas. H2S and mercaptans are removed from the gas in the contactor and the sulfur is chem. bound in the spent chem. The chem. is then regenerated with the use of air in a sep. regeneration tank. Finally, the elemental sulfur formed in the regeneration tank is removed with the use of a solids separation step such as a settling tank, a centrifuge, or a filter press. The regenerated Enviro-tek is then ready for re-use in the scrubbing tower or direct injection pipeline. The experimental process involved the reaction of 2,2′,2”-(1,3,5-Triazinane-1,3,5-triyl)triethanol(cas: 4719-04-4).Synthetic Route of 4719-04-4

The Article related to natural gas hydrogen sulfide scavenger regeneration, Fossil Fuels, Derivatives, and Related Products: Natural Gas and other aspects.Synthetic Route of 4719-04-4

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

On January 31, 2018, Subramaniam, Ramalingam; Yasa, Santosh; Bertrand, Tre; Fontenot, Brittany; Dupuis, Thomas F.; Hernandez, Rafael published an article.Name: 2,2′,2”-(1,3,5-Triazinane-1,3,5-triyl)triethanol The title of the article was Advanced simulation of H2S scavenging process with triazine at different depths of gas well. And the article contained the following:

Over the 10 years the world has experienced significant growth in global natural gas consumption, rendering natural gas as one of the most important energy sources of the future. However, more than 40% of the natural gas reservoirs are sub quality because of the presence of acid gases like hydrogen sulfide (H2S) and carbon dioxide (CO2). Removal of these impurities from natural gas is of prime importance because of the health, environment, and corrosion issues in pipelines and other processing equipment. Absorption of H2S by 1,3,5-tri-(2-hydroxyethyl)-hexahydro-s-triazine has many advantages in terms of economics and efficiency over alkanolamines. The main objective of this work is to develop a Visual Basic simulation for hydrogen sulfide removal from natural gas at different depths of gas well using triazine. The thermodn. properties of the components, triazine, thiadiazine, and diathiazine estimated from the Aspen Plus have closer agreement with Spartan simulation results. H2S concentration in the clean gas and the triazine requirement per lb of H2S removal at different depths along the well obtained from the Visual Basic simulation were validated with the Coastal Chem. Inc., field data. With the increase in mass flowrate of triazine solution, the H2S concentration in the clean gas decreased, and the amount of triazine required per lb of H2S removal decreased. The developed simulation calculates the quantity of triazine required per lb of H2S removal at different depths of the gas well, which allows the user to determine the optimum depth for maximum H2S removal with min. triazine requirement. The experimental process involved the reaction of 2,2′,2”-(1,3,5-Triazinane-1,3,5-triyl)triethanol(cas: 4719-04-4).Name: 2,2′,2”-(1,3,5-Triazinane-1,3,5-triyl)triethanol

The Article related to hydrogen sulfide triazine scavenging process gas well, Fossil Fuels, Derivatives, and Related Products: Natural Gas and other aspects.Name: 2,2′,2”-(1,3,5-Triazinane-1,3,5-triyl)triethanol

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

On July 20, 2018, Yin, Xuguang; Huang, Yi; Chen, Ziyi; Hu, Yang; Tao, Lin; Zhao, Qingyang; Dong, Xiu-Qin; Zhang, Xumu published an article.HPLC of Formula: 280752-78-5 The title of the article was Enantioselective Access to Chiral 2-Substituted 2,3-Dihydrobenzo[1,4]dioxane Derivatives through Rh-Catalyzed Asymmetric Hydrogenation. And the article contained the following:

Rh-catalyzed asym. hydrogenation of various benzo[b][1,4]dioxine derivatives, e.g. I, was successfully developed to prepare chiral 2-substituted 2,3-dihydrobenzo[1,4]dioxane derivatives using ZhaoPhos and N-methylation of ZhaoPhos ligands with high yields and excellent enantioselectivities (up to 99% yield, >99% enantiomeric excess (ee), turnover number (TON) = 24,000). Moreover, this asym. hydrogenation methodol., as the key step with up to 10 000 TON, was successfully applied to develop highly efficient synthetic routes for the construction of some important biol. active mols., such as MKC-242, WB4101, BSF-190555 and (R)-doxazosin·HCl. The experimental process involved the reaction of (6-Bromo-2,3-dihydrobenzo[b][1,4]dioxin-2-yl)methanol(cas: 280752-78-5).HPLC of Formula: 280752-78-5

The Article related to rhodium catalyst hydrogenation benzodioxin asym preparation, Heterocyclic Compounds (More Than One Hetero Atom): Dioxanes and other aspects.HPLC of Formula: 280752-78-5

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

On June 30, 2012, Maarman, Gerald; Marais, Erna; Lochner, Amanda; du Toit, Eugene F. published an article.Category: alcohols-buliding-blocks The title of the article was Effect of Chronic CPT-1 Inhibition on Myocardial Ischemia-Reperfusion Injury (I/R) in a Model of Diet-Induced Obesity. And the article contained the following:

Purpose By increasing circulating free fatty acids and the rate of fatty acid oxidation, obesity decreases glucose oxidation and myocardial tolerance to ischemia. Partial inhibition of fatty acid oxidation may improve myocardial tolerance to ischemia/reperfusion (I/R) in obesity. We assessed the effects of oxfenicine treatment on post ischemic cardiac function and myocardial infarct size in obese rats. Methods Male Wistar rats were fed a control diet or a high calorie diet which resulted in diet induced obesity (DIO) for 16 wk. Oxfenicine (200 mg/kg/day) was administered to control and DIO rats for the last 8 wk. Isolated hearts were perfused and infarct size and post ischemic cardiac function was assessed after regional or global ischemia and reperfusion. Cardiac mitochondrial function was assessed and myocardial expression and activity of CPT-1 (carnitine palmitoyl transferase-1) and IRS-1 (insulin receptor substrate-1) was assessed using Western blot anal. Results In the DIO rats, chronic oxfenicine treatment improved post ischemic cardiac function and reduced myocardial infarct size after I/R but had no effect on the cardiac mitochondrial respiration. Chronic oxfenicine treatment worsened post ischemic cardiac function, myocardial infarct size and basal mitochondrial respiration in control rat hearts. Basal respiratory control index (RCI) values, state 2 and state 4 respiration rates and ADP phosphorylation rates were compromised by oxfenicine treatment. Conclusion Chronic oxfenicine treatment improved myocardial tolerance to I/R in the obese rat hearts but decreased myocardial tolerance to I/R in control rat hearts. This decreased tolerance to ischemia of oxfenicine treated controls was associated with adverse changes in basal and reoxygenation mitochondrial function. These changes were absent in oxfenicine treated hearts from obese rats. The experimental process involved the reaction of H-Phg(4-OH)-OH(cas: 32462-30-9).Category: alcohols-buliding-blocks

The Article related to chronic cpt1 myocardial ischemia reperfusion injury obesity, Mammalian Pathological Biochemistry: Cardiovascular Diseases and other aspects.Category: alcohols-buliding-blocks

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

On June 23, 2005, Scott, Ian L.; Ralph, Jeffrey M.; Voss, Matthew E. published a patent.Synthetic Route of 72364-46-6 The title of the patent was Pharmaceutical compositions containing vinca alkaloid derivatives. And the patent contained the following:

The present invention relates to the preparation of derivatives of vinca alkaloids, I (R1 = alkyl, alkenyl, alkynyl, aryl, heterocycle, halogen, CN, CHO, ester, amide, sulfate, sulfonyl, amine, sulfide, borate, etc.; R2 = alkyl, or CHO, R3 = H, alkyl, oar c(O)R5, R4 = H, C(O)R5; R5, R6, R7 = independently alkyl, alkenyl, alkynyl, aryl, or heterocycle; R8 = H, halogen, alkyl, alkenyl, alkynyl, aryl, heterocycle, acyl, or thioalkyl; R9 = Ph, R10 = H or R9 and R10 together form a bridging double bond; R5, and R6 could form a ring or R6 and R7 could form a ring; X = ether, amine hydrazine, OH, etc.) for the treatment of various conditions. Thus, 12′-bromovincristine, cesium carbonate and Ph boronic acid were mixed in 1,4-dioxane and then treated with [1,1′-bis(diphenylphosphino)ferrocene]dichloropalladium(II) to give II, which displayed a GI50 of 50 and 30 nM in HeLa and MCF-7 cells resp. Pharmaceutical compositions containing these compounds as well as processes of preparation and treatment of various conditions are also disclosed. The experimental process involved the reaction of (2-Fluorophenyl)methanethiol(cas: 72364-46-6).Synthetic Route of 72364-46-6

The Article related to vinca alkaloid vinblastine vincristine derivative preparation, Alkaloids: Alkaloids Containing Three Or More Nitrogen Atoms and other aspects.Synthetic Route of 72364-46-6

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

On July 31, 2011, Marina Prendes, M. G.; Hermann, R.; Torresin, M. E.; Souto, P.; Tallis, S.; Savino, E. A.; Varela, A.; Jaitovich, M. M. published an article.Product Details of 32462-30-9 The title of the article was Involvement of energetic metabolism in the effects of ischemic postconditioning on the ischemic-reperfused heart of fed and fasted rats. And the article contained the following:

The effects of ischemic-postconditioning (IPOC) on functional recovery and cell viability of ischemic-reperfused hearts from fed and fasted rats were studied in relation to triacylglycerol and glycogen mobilization, ATP content, glucose-6-phosphate dehydrogenase activity and reduced/oxidized glutathione (GSH/GSSG). Oxidative damage was estimated by measuring thiobarbituric acid reactive substances (TBARS). IPOC improved contractile recovery and cell viability in the fed but attenuated them in the fasted hearts. In both groups ischemia lowered glycogen. IPOC further reduced it. Triacylglycerol remained unchanged during ischemia-reperfusion in both groups, but triacylglycerol mobilization was activated by IPOC in the fasted group. ATP was increased by IPOC in the fed hearts, but lowered in the fasted ones, which appeared to be associated with the rates of ATP synthesis in isolated mitochondria. In the fed hearts IPOC raised glucose-6-phosphate dehydrogenase activity and GSH/GSSG, and lowered TBARS. These results suggest that IPOC effects are associated with changes in the ATP supply, mobilization of energy sources and glutathione antioxidant ratio. The experimental process involved the reaction of H-Phg(4-OH)-OH(cas: 32462-30-9).Product Details of 32462-30-9

The Article related to energy metabolism ischemic postconditioning reperfusion fed fasting heart, Mammalian Pathological Biochemistry: Cardiovascular Diseases and other aspects.Product Details of 32462-30-9

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

On March 9, 2016, Yu, Kun; Reichard, Mikayla C.; Dai, Ning published an article.Synthetic Route of 2160-93-2 The title of the article was Nitrosamine Formation in the Desorber of Tertiary Alkanolamine-Based Carbon Dioxide Capture Systems. And the article contained the following:

Tertiary amines are being considered as absorption solvents for post-ombustion CO2 capture, but their potential to form harmful byproducts nitrosamines is yet to be evaluated. This study examined the factors affecting the formation of nitrosamines from tertiary alkanolamines under simulated desorber conditions and the effects of amine structural characteristics. Total nitrosamine formation from tertiary alkanolamine was determined to be 1st-order with respect to nitrite concentration and the absorbed CO2, but was 0-order with respect to amine concentration in the range of 0.5-2.5M. Tertiary alkanolamines formed less nitrosamine than their secondary amine analogs. For tertiary alkanolamines with the same number of 2-hydroxyethyl groups, smaller steric hindrance resulted in more nitrosamine formation and higher yields based on nitrite consumption. The anal. of specific nitrosamines revealed that the cleavage of 2-hydroxyethyl group was preferred over demethylation, but comparable to de-ethylation. Reaction pathways were proposed to account for the exptl. observations. The experimental process involved the reaction of 2,2′-(tert-Butylazanediyl)diethanol(cas: 2160-93-2).Synthetic Route of 2160-93-2

The Article related to nitrosamine formation desorber tertiary alkanolamine carbon dioxide capture, Air Pollution and Industrial Hygiene: Industrial Waste Gases and other aspects.Synthetic Route of 2160-93-2

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

On July 31, 2014, Marina Prendes, M. G.; Hermann, R.; Torresin, M. E.; Souto, P.; Tallis, S.; Savino, E. A.; Varela, A.; Jaitovich, M. M. published an article.Computed Properties of 32462-30-9 The title of the article was Involvement of energetic metabolism in the effects of ischemic postconditioning on the ischemic-reperfused heart of fed and fasted rats [Erratum to document cited in CA155:680168]. And the article contained the following:

On page 303, an author was erroneously omitted from the author list; the corrected author list is given. The experimental process involved the reaction of H-Phg(4-OH)-OH(cas: 32462-30-9).Computed Properties of 32462-30-9

The Article related to erratum energy metabolism ischemic postconditioning reperfusion fed fasting heart, Mammalian Pathological Biochemistry: Cardiovascular Diseases and other aspects.Computed Properties of 32462-30-9

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

On June 19, 2013, Chowdhury, Firoz Alam; Yamada, Hidetaka; Higashii, Takayuki; Goto, Kazuya; Onoda, Masami published an article.Product Details of 2160-93-2 The title of the article was CO2 Capture by Tertiary Amine Absorbents: A Performance Comparison Study. And the article contained the following:

This work assessed CO2 capture with 24 tertiary amine absorbents (including 3 synthetic amines) with systematic modification of their chem. structures. Aqueous amine solutions (30 % mass fraction) were used to evaluate CO2 capture performance. Laboratory gas scrubbing, vapor-liquid equilibrium, and reaction calorimetry experiments were conducted to obtain the absorption rate, amount of CO2 absorbed, cyclic CO2 capacity, and heat of reaction for each absorbent. Results for were compared with the conventional tertiary absorbent, N-methyldiethanolamine (MDEA). Seven of the studied absorbents performed well with high absorption rates and cyclic capacities. Among these absorbents, some displayed lower heats of reaction than MDEA. Results provided basic guidelines to discover potential tertiary amine-based absorbents which may lead to development of new absorbent systems for CO2 capture. The experimental process involved the reaction of 2,2′-(tert-Butylazanediyl)diethanol(cas: 2160-93-2).Product Details of 2160-93-2

The Article related to flue gas carbon dioxide absorption removal tertiary amine, synthetic com tertiary amine sorbent flue gas carbon dioxide, Air Pollution and Industrial Hygiene: Industrial Waste Gases and other aspects.Product Details of 2160-93-2

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

On October 12, 2017, Narku-Tetteh, Jessica; Muchan, Pailin; Saiwan, Chintana; Supap, Teeradet; Idem, Raphael published an article.Synthetic Route of 2160-93-2 The title of the article was Selection of components for formulation of amine blends for post combustion CO2 capture based on the side chain structure of primary, secondary and tertiary amines. And the article contained the following:

Side chain structure and number of OH- groups in primary, secondary, and tertiary amines effect on CO2 absorption and desorption kinetics, equilibrium loads, heat duty, cyclic capacity, heat of absorption, and pKa were assessed and used to develop rational criteria to select components to formulate an optimum amine blend. Based on these criteria, amines which had a combination of high absorption and desorption parameters were selected. Their mixing ratios and concentrations were varied to obtain best overall performance. Results showed that in comparison with their straight-chain analogs, steric hindrance present in branched-chain alkanolamines resulted in much faster desorption rate, higher CO2 solubility and cyclic capacity, and much lower heat duty for solvent regeneration, but just a slight decrease in CO2 absorption rate. Developed criteria resulted in formulating an excellent bi-solvent aqueous amine blend (comprised of 2 M BEA + 2 M AMP), shown to have outstanding desorption characteristics/heat duty and very good absorption characteristics. Also, this work developed a non-trial-and-error procedure to determine heat of CO2 absorption based on Gibbs-Helmholtz equation. It showed the CO2 absorption rate and heat of CO2 absorption may not necessarily be proportional to the heat of absorption and heat duty, resp. Both these relations were shown to be strong functions of amine structure. The experimental process involved the reaction of 2,2′-(tert-Butylazanediyl)diethanol(cas: 2160-93-2).Synthetic Route of 2160-93-2

The Article related to component selection amine blend formulation carbon dioxide absorption desorption, post combustion flue gas carbon dioxide absorption desorption, Air Pollution and Industrial Hygiene: Industrial Waste Gases and other aspects.Synthetic Route of 2160-93-2

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts