Fuhrmann and N. Fedtke, Maleic and fumaric Acids. Ullmann's Encyclopedia of Industrial Chemistry, VCH, Weinheim, Germany, Vol. A16, pp. 53-62 (1990).Lohbeck K, Haferkorn H, Fuhrmann W, Fedtke N (2000) Maleic and fuma- ric acids. In: Ullmann's encyclopedia of industrial chemistry. ...
Maleic acid, also known as maleinic acid and toxilic acid, is a white crystalline (monoclinic) powder and possesses a faint acidulous odor and an astringent taste. It is soluble in water and alcohol. Maleic acid and fumaric acid are the simplest unsaturated carboxylic diacids. These acids ex...
maleic acid- a colorless crystalline compound found in unripe fruit (such as apples or tomatoes or cherries) and used mainly to make polyester resins acid- any of various water-soluble compounds having a sour taste and capable of turning litmus red and reacting with a base to form a salt ...
Maleic acid and fumaric acid are the simplest unsaturated carboxylic diacids. These acids experience two-step dissociation in aqueous solutions.They have the same structural formula but different spatial configurations. Fumaric acid is the trans and maleic acid the cis isomer. The physical properties ...
Maleicanhydride(CAS 108-31-6) derives from naturalmalic acid.Maleic anhydrideas well as maleic andfumaric acidswere first prepared in the 1830s. However, commercial manufacture did not begin until a century later. In 1933, the National Aniline and Chemical Co., Inc., used a process for produ...
Answer and Explanation:1 Usually, fumaric and malic acids are the geometrical isomers, which means the molecular formula is the same, but the geometry is different. Maleic...
Specified fuels are gasolines, fuel oils, diesel and aviation fuels and kerosene, which may also contain conventional lead scavengers, deicers, anticlogging agents, demulsifiers and smoke suppressants. The esters may be prepared by reacting chloro- or bromo-substituted maleic or fumaric acids or ...
It is generally carried out using vanadium-phosphorus-oxygen catalysts (known as VPO catalysts) (see Ullmann's Encyclopedia of Industrial Chemistry, 6th edition, 2000 electronic release, Chapter “MALEIC AND FUMARIC ACIDS, Maleic Anhydride—Production”). The VPO catalysts generally employed are ...
The surface-enhanced Raman scattering (SERS) spectra of maleic (cis; 2-butaneoic acid) and fumaric (trans; 2-butaneoic acid) acids adsorbed on aqueous silver sol particles are reported. These two acids form two groups of isomers which differ only in the relative positions of the two ...
A fumaric acid dehydration process along. 常用的方法是用二甲苯蒸汽在填料脱水塔中和顺丁烯二酸逆向流动接触,脱水生成顺丁烯二酸酐. Commonly used method is to use xylene vapor dehydration column packing countercurrently contacted with maleic acid, maleic anhydride dehydration. 但是,在此过程中会产生顺丁烯...