摘要:
A Process for making vinyl acetate, comprising the steps: (a) providing hydrogen with a deuterium content below 90 ppm, based on the total hydrogen content, by water electrolysis using electrical power that is generated at least in part from non-fossil, renewable resources; (b) providing carbon dioxide; (c) reacting hydrogen and carbon dioxide in the presence of a catalyst to form methanol with a deuterium content below 90 ppm, based on the total hydrogen content; (d) reacting methanol from step (c) to form ethylene; and (e) reacting methanol from step (c) with carbon monoxide to form acetic acid; and/or (f1) reacting part of the ethylene from step (d) with oxygen and water to give acetaldehyde; (f2) reacting acetaldehyde from step (f1) with oxygen to give acetic acid; (g) reacting acetic acid from step (e) and/or step (f1) with ethylene from step (d) to give vinyl acetate.
摘要:
The embodiments of the process of the present invention relate to the preparation of alkyl ketene dimers (AKD), where the process combines at least one polyamine with a fatty acid chloride in a molar ratio of less than one mole of polyamine to one mole of fatty acid chloride thereby forming an alkyl ketene dimer/amine salt that is subsequently separated into an organic dimer layer and an aqueous salt layer.
摘要:
Severely sterically hindered secondary aminoether alcohols are prepared by reacting organic carboxylic, organic carboxylic acid halides, acid anhydrides or a ketene with an alkyl, alkaryl or alkylhalo sulfonate to yield a sulfonic. Carboxylic anhydride compound which is then reacted with a dioxane to cleave the ring of the dioxane, yielding a cleavage product which cleavage product is then aminated with an alkylamine and hydrolyzed with base to yield the severely sterically hindered secondary aminoether alcohol.
摘要:
A method of co-producing acetic anhydride and an acetate ester includes pyrolizing acetic acid at elevated temperature to produce a first ketene stream, the first ketene stream being a vapor phase stream comprising ketene, acetic acid and water; cooling the first ketene stream to condense acetic acid and water therefrom, thereby generating (i) a weak acid aqueous stream and (ii) a ketene feed stream; feeding the ketene feed stream to an acetic anhydride reactor where the ketene is reacted with acetic acid to produce acetic anhydride; concurrently with step (c ), feeding the weak acid aqueous stream to an esterification reactor wherein acetic acid in the weak acid stream is reacted with an organic alcohol to produce an acetate ester. Preferably, the organic alcohol is selected from organic alcohols which (i) form acetate esters which esters and optionally alcohols provide azeotropic mixtures with water and (ii) wherein the azeotropic mixtures have a water content greater than the amount of water generated by reaction of the alcohol with acetic acid to facilitate azeotropically separating the acetate ester from the reaction mixture.
摘要:
Disclosed is a process for the production of ketene using acetic acid obtained from acetylation fluid recovered from a wood acetylation process. The invention includes the production of acetic anhydride from the ketene.
摘要:
The present invention discloses the device and method for continuously preparing high-purity AKD without solvent. The adopted device includes a kind of reactor which could make continuous mixing reaction of raw materials. The main preparation process is: firstly, the tertiary amine is continuously fed into the reactor from starting end and the acyl chloride is continuously fed from three to ten line; secondly, under the operating state of reactor, the main motor drives the internal cylinder to rotate in relation to external cylinder, forcing the fed materials to be conveyed and stirred by blades in the conveying section of annular column passage and forcing the fed materials to be sheared and mixed by relative movement of shearing blades and kneading blades at mixing section. Due to alternate arrangement of conveying section and mixing section along the axial direction of annular column passage, it causes the sufficient reaction of fed materials and controls the material temperature through internal and external heat exchange systems until the reaction products are discharged continuously from outlet. The device and process adopted by the present invention could realize the disperse generation of reaction heat and sufficient material mixture and complete reaction to make it easy to control the reaction temperature and material viscosity and decrease the generation of side reaction to ensure the high purity of products.
摘要:
A catalysed acetic acid pyrolysis process for the preparation of ketene and/or its derivatives is characterised in that phosphoric acid in the form of a liquid jet is atomised as a catalyst into the acetic acid vapour.
摘要:
Verfahren zur Herstellung von lösungsmittelarmen Alkyldiketenen der allgemeinen Formel I in der
R 1 C 10 - bis C 30 -Alkyl oder C 10 - bis C 30 -Alkenyl und R 2 Wasserstoff oder C 1 - bis C 8 -Alkyl bedeuten, durch Umsetzung von Carbonsäurechloriden der allgemeinen Formel II in der R 1 und R 2 die obengenannten Bedeutungen haben, mit tertiären Aminen der allgemeinen Formel III in der
R 3 ,R 4 ,R 5 C 1 - bis C 12 -Alkyl oder C 3 - bis C 12 - Cycloalkyl, R 3 und R 4 gemeinsam eine gegebenenfalls durch Sauerstoff oder Stickstoff unterbrochene C 2 - bis C 11 -Alkylendikette, bedeuten, in einem mit Wasser im wesentlichen nicht mischbaren, inerten Lösungsmittel, indem man bei Temperaturen von 80 bis 130°C und Drücken von 10 bis 500 mbar und anschließend unter Zusatz von Wasser oder Wasserdampf destilliert.
摘要翻译:在制作 的式(I)的烷基二乙烯基, 通过使式R 1 R 2 CHC(O)Cl(II)的羧酰氯与叔 - 在与水不混溶的惰性溶剂中的式(III)的胺反应混合。 在80-130℃和10-500毫巴下蒸馏,然后加入。 的水或蒸汽。 在式中,R 1 = 10-30 C(en) R 2 = H或1-8C烷基; R 3,R 4,R 5 = 1-12C烷基或3-12个C环烷基; 或R 3 + R 4 = 2-11C亚烷基, 链中有O或N。
摘要:
Disclosed is a novel process for the manufacture of 2,2,4,4-tetramethylcyclobutanediol commencing with the pyrolysis of isobutyric anhydride to produce dimethylketene. Dimethylketene is absorbed into certain carboxylate ester solvents which function as the process solvents for subsequent dimerization of the dimethylketene to 2,2,4,4-tetramethylcyclobutanedione followed by the catalytic hydrogenation of the dione to the diol product.