Alkenyl succinic anhydride.
The alkenyl succinic anhydride and derivatives thereof are useful as additives for fuels, lubricating oil compositions, curing agents for epoxy resins, plasticizers, surfactants etc. Alkenyl succinic anhydrides wherein the alkenyl substituent has from about 6 to 18 carbon atoms are of value as a raw material for the production of C 6-C 18 alkyl ...
Alkenyl succinic anhydride (ASA) is a reactive sizing agent that can impart good water repellence to paper by decreasing the wettability of the cellulose fibers. However, ...Alkenyl succinic anhydride (ASA) is one of the typical neutral sizes as well as alkyl ketene dimer (AKD) for paper, giving water-repellency to paper efficiently by being added as …Alkenyl succinic anhydride (ASA) was added to the agents that would increase the resistance of cellulose fibers to the adsorption of water under …Cationic starch and polyacrylamides for alkenyl succinic anhydride (ASA) emulsification for sizing of cellulosic fibers. Paper is composed of polysaccharides mainly cellulose and carbohydrates. The hydroxyl groups present in cellulose react with various substances added to fibrous slurry. Treating the cellulosic fibers….
Apr 14, 2023 ... Fenbufen Part 2/3. Here's a quick preparation video. The dehydration of succinic acid to succinic anhydride using acetic anhydride following ...Alkenyl succinic anhydride (ASA) is a reactive sizing agent that can impart good water repellence to paper by decreasing the wettability of the cellulose fibers. However, ...Sizing performance of alkenyl succinic anhydride (ASA) emulsion stabilized by polyvinylamine macromolecules. Colloids and Surfaces A: Physicochemical and Engineering Aspects 2018, 539, 132-139. DOI: 10.1016/j.colsurfa.2017.12.014. Qi Zhao, Wenxia Liu, Guodong Li, Lucian A. Lucia, Huili Wang, Dehai Yu.
Alkenyl succinic anhydride (ASA) is a viscous polar oil, typically used as a paper sizing agent after being emulsified. ASA and water emulsions stabilized by TiO 2 nanoparticles were prepared by adding the aqueous phase to the oil phase. Catastrophic phase inversion from w/o to o/w or w/o/w has been investigated by monitoring the …
The optimal reaction conditions for obtaining the maximal yield (around 95%) of alkenyl succinic anhydride from methyl oleate were 235C, a molar ratio of 1.5, and a reaction lasting 8 h. However ...Alkenyl Succinic Anhydride (ASA) is basic or neutral type sizing agent. It is wax like chemicals. ASA is used as internal sizing chemicals for paper. Structurally, it is unsaturated linear chain having five-membered anhydride ring and it is synthesized from Alfa-olefins and maleic anhydride. The anhydride ring has no fixd position in the chain ...Sizing performance of alkenyl succinic anhydride (ASA) emulsion stabilized by polyvinylamine macromolecules. Colloids and Surfaces A: Physicochemical and Engineering Aspects 2018, 539, 132-139. DOI: 10.1016/j.colsurfa.2017.12.014. Qi Zhao, Wenxia Liu, Guodong Li, Lucian A. Lucia, Huili Wang, Dehai Yu.Among them, alkenyl succinic anhydride (ASA) is a commonly applied neutral sizing agent, and needs to be prepared as an oil-in-water emulsion before sizing …
Alkenyl succinic anhydride (ASA) is one of the most prominent paper sizing agents worldwide. Commercial products start from isomerized C16-18 olefins with certain distribution of the double bond along the alkyl chain. This distribution is then found again in the product ASA which renders mechanistic studies on ASA binding to the cellulose ...
Cationic starch and polyacrylamides for alkenyl succinic anhydride (ASA) emulsification for sizing of cellulosic fibers. Paper is composed of polysaccharides mainly cellulose and carbohydrates. The hydroxyl groups present in cellulose react with various substances added to fibrous slurry. Treating the cellulosic fibers….
Abstract. Medium and long chain esters of inulin have been prepared by reaction of alkenyl succinic anhydrides (ASA) such as 2-octen-1-ylsuccinic anhydride (OSA), and 2-dodecen-1-ylsuccinic anhydride (DDSA) in aqueous media and aqueous surfactant media, respectively. The design of the chemical process was based on the …Reaction product of octadec-2-enylsuccinic anhydride and water. Constituent 2. Reference substance name: C26 alkenyl succinic acid Molecular formula: C30H56O4 IUPAC Name: C26 alkenyl succinic acid. ... C26 alkenyl succinic acid. Constituent 3. Reference substance name: Octadec-1-ene EC Number: 204-012-9 EC Name: Octadec-1-ene CAS …Alkenyl succinic anhydride, a dicarboxylic anhydride, can be synthesized by the reaction between olefins (C n H 2n) and maleic acid. This compound has two active carboxyl groups from maleic acid which can occur esterification reaction with the hydroxyl groups of polysaccharide. Meanwhile another long chain alkyl part render its …Alkenyl succinic anhydride (ASA) was added to the agents that would increase the resistance of cellulose fibers to the adsorption of water under neutral/alkaline conditions (at pH's in the range ...Apr 14, 2023 ... Fenbufen Part 2/3. Here's a quick preparation video. The dehydration of succinic acid to succinic anhydride using acetic anhydride following ...The amphiphilicity of octenyl succinic anhydride (OSA)-modified starch is improved due to the introduction of dual functional hydrophilic and hydrophobic groups . Based on its amphiphilicity, OSA-starch is used as an emulsifier and stabilizer in many food or oil-in-water systems, cosmetics, and pharmaceutical products [ 19 – 22 ].
alkenyl succinic anhydride; emulsion; stability; Acknowledgements. The authors are grateful for the financial provided by the National Natural Science Foundation of China (52172147), the Natural Science Foundation of Shandong Province (ZR2022MB095), Shandong Province Key Research and Development Program (2021ZDSYS18), and the …Synthesis of alkenyl succinic anhydrides from methyl esters of high oleic sunflower oil. Laboratoire de Chimie. Alkenyl succinic anhydrides (ASA) have been prepared by ene …In this work, we modified this water-soluble polymer with alkenyl succinic anhydride in order to attach a hydrophobic group to it. The modification used two reagents: octenyl succinic anhydride and tetrapropenyl succinic anhydride. Reactions were conducted at 120 °C using dimethyl sulfoxide as a solvent, with conversions better than 88%.Kemira Oyj (Helsinki, Finland) announced a significant investment in the production of alkenyl succinic anhydride sizing agent (ASA) in China. ASA is one of the most effective and cost-efficient sizing agents for improving water-resistance in paper and packaging board.The optimal reaction conditions for obtaining the maximal yield (around 95%) of alkenyl succinic anhydride from methyl oleate were 235°C, a molar ratio of 1.5, and a reaction lasting 8 h. However, the products synthesized under these conditions showed high viscosity (215 cP), a very dark color (18+ Gardner color), and a high content of ...[103+ Pages Insights] | Alkenyl Succinic Anhydride (ASA) Market is anticipates experiencing substantial expansion in the upcoming years by its Types [, OSA, ODSA, NSA, DDSA, Others], & by ...
Here, an easy-fabricating, stable, and high-performance alkenyl succinic anhydride (ASA) paper-sizing emulsion is developed, which is stabilized by lauric arginate (LAE)/cellulose nanocrystal (CNC ...
Alkenyl succinic anhydride (ASA) is a commercial product from Dixie Chemical Co., Inc. It is light-amber liquid at room temperature, being composed of more than 70 wt% of hexadecenylsuccinic anhydride (HDSA, C 20 H 34 O 3 ), less than 25 wt% of octadecenylsuccinic anhydride (ODSA, C 22 H 38 O 3 ) and less than 2.5 wt% of mixed C15–20 olefins ...Alkenyl Succinic Anhydride. Technical Datasheet | Supplied by Albemarle. ASA is uses as a surfactant intermediate, engine oil lubricant additive, viscosity and pour-point improver, plasticizer, epoxy, antifreeze lubricant, moisture control for leather goods and corrosion inhibitor. Product Type.Alkenyl Succinic Anhydride Structure. Influences the Surface Activities of Gelatin. Derivatives. Li-Huei Lin, Hsin-Jiant Liu, Hawn-Chung Chu, Mou-Chuan Hwang, Keng-Ming Chen & Ewe-Chuan Tan.The Global Alkenyl Succinic Anhydride (ASA) Market is Segmented on the basis of Product Type, Application, End-Use Industries, and Geography. Alkenyl Succinic Anhydride (ASA) Market, By Product Type Low Molecular Weight ASA: This type is characterized by lower molecular weights and may find applications in specific industries.Hyaluronic acid (HA) of various molecular weights (4000, 14,000, 30,000, 100,000 and 850,000 g/mol) was modified with aryl and alkenyl succinic anhydrides (ASA).The modifications were conducted at pH 8.0–8.5 for 16 h at 25 or 60 °C.The 1 H NMR spectrum of octenyl succinic anhydride modified HA (OSA-HA) was elucidated using …On the heels of the Farecast post from earlier today, I looked around and realized that we've never asked you how you do airline travel on the cheap. On the heels of the Farecast p...It participates in the synthesis of alkenyl inulin derivatives and biosurfactants. Application (2-Dodecen-1-yl)succinic anhydride may be used in the following: Synthesis of amphiphilic N-[(2´-(dodec-2´-en-10-yl)succinoyl]chitosan. Chemical modification of …The URL has moved here
A process for making an alkenyl succinic anhydride having reduced levels of tar and color bodies, said process comprising reacting maleic anhydride with an aliphatic olefin containing about 4-250 carbon atoms at a temperature of about 190°-250° C. in the presence of a triarylphosphite having the structure: ##STR2## wherein R 1 is a tert-alkyl ...
Alkenyl succinic anhydride (ASA) sizing is dominating over other sizing processes due to its high reactivity and economy. The shelf life of conventionally used cationic starch (CS) stabilized ASA ...
SYMPTOMS: Symptoms of exposure to this chemical may include eye, skin, mucous membrane and respiratory tract irritation; it may blister and burn the skin on contact. ACUTE/CHRONIC HAZARDS: When heated to decomposition this compound emits acrid smoke and fumes of carbon monoxide and carbon dioxide. It may cause eye, respiratory tract, mucous ...Virgin Atlantic will soon receive a new aircraft type with new seats in all classes. Virgin Atlantic has a new aircraft type with an all-new business class cabin and two very speci...Sep 1, 2005 · Alkenyl succinic anhydride (ASA) was added to the agents that would increase the resistance of cellulose fibers to the adsorption of water under neutral/alkaline conditions (at pH's in the... In this work, we modified this water-soluble polymer with alkenyl succinic anhydride in order to attach a hydrophobic group to it. The modification used two reagents: octenyl succinic anhydride and tetrapropenyl succinic anhydride. Reactions were conducted at 120 °C using dimethyl sulfoxide as a solvent, with conversions better than 88%.Wood flour was also esterified with a commercial alkenyl succinic anhydride (ASA) (Acha et al., 2003; Marcovich et al., 2005, Fig. 4.6). The FTIR spectrum of the treated sample …Medicine Matters Sharing successes, challenges and daily happenings in the Department of Medicine To register for an upcoming session, click here. For Dr. Reddy's complete bio, cli...Feb 20, 2018 · It is well known that alkenyl succinic anhydride (ASA), an alkaline sizing agent, when applied to cellulosic fibers will impart a resistance to the absorption of water. High reactivity of ASA to cellulosic fiber compared to that of alkyl ketene dimer (AKD) is the main advantage of ASA sizing. SYMPTOMS: Symptoms of exposure to this chemical may include eye, skin, mucous membrane and respiratory tract irritation; it may blister and burn the skin on contact. ACUTE/CHRONIC HAZARDS: When heated to decomposition this compound emits acrid smoke and fumes of carbon monoxide and carbon dioxide. It may cause eye, respiratory tract, mucous ...
Succinic anhydride appears as colorless needles or white crystalline solid. Melting point 237 °F. Sublimes at 239 °F at 5 mmHg pressure; and at 198 °F and 1 mmHg pressure. Moderately toxic and an irritant. CAMEO Chemicals. Succinic anhydride is a cyclic dicarboxylic anhydride and a tetrahydrofurandione.Alkenyl succinic anhydrides (ASA) are derivatives of succinic anhydrides. One H of the succinic anhydride ring is replaced with an iso-alkenyl chain (C14 to C22). ASA's are colorless and usually viscous liquids. They are widely used, especially in surface sizing of paper, paperboard, and cardboard, as well as in … See moreAlkenyl succinic anhydride(ASA) is a popular paper-sizing agent that is generally added to papermaking systems as an aqueous emulsion. Herein, we reviewed the recent work focusing on ASA emulsions stabilized by solid particles. Solid particle-stabilized ASA emulsions generally possess high ASA content and exhibit good sizing performance.Instagram:https://instagram. how can i blockthe cloisters museumhow to get on screen keyboardgames on tablets Feb 27, 2020 · In this work, we modified this water-soluble polymer with alkenyl succinic anhydride in order to attach a hydrophobic group to it. The modification used two reagents: octenyl succinic anhydride and tetrapropenyl succinic anhydride. Reactions were conducted at 120 °C using dimethyl sulfoxide as a solvent, with conversions better than 88%. To improve the amphipathic property of glucuronoxylans and develop high quality natural-based/green emulsifiers, glucuronoxylans were chemically modified by alkenyl succinic anhydrides to produce a novel … payroll portalfl tampa south Cationic starch and polyacrylamides for alkenyl succinic anhydride (ASA) emulsification for sizing of cellulosic fibers. Paper is composed of polysaccharides mainly cellulose and carbohydrates. The hydroxyl groups present in cellulose react with various substances added to fibrous slurry. Treating the cellulosic fibers…. airfare to miami from lax Get ratings and reviews for the top 10 moving companies in El Paso, TX. Helping you find the best moving companies for the job. Expert Advice On Improving Your Home All Projects Fe...You can be true to yourself without spiraling into a fierce debate. There are a lot of reasons you might prefer to keep your religious beliefs—or lack thereof—to yourself. In a soc...