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    • 3. 发明申请
    • PROCESS FOR THE PRODUCTION OF DIALKYL CARBONATE AND ALKANEDIOL
    • 生产碳酸二烷基酯和阿尔卡尼醇的方法
    • WO2007096343A1
    • 2007-08-30
    • PCT/EP2007/051586
    • 2007-02-20
    • SHELL INTERNATIONALE RESEARCH MAATSCHAPPIJ B.V.VAN DER HEIDE, EvertNISBET, Timothy MichaelVAPORCIYAN, Garo Garbis
    • VAN DER HEIDE, EvertNISBET, Timothy MichaelVAPORCIYAN, Garo Garbis
    • C07C68/06C07C69/96C07C29/128
    • C07C68/065C07C29/128C07C68/08Y02P20/127Y02P20/142C07C69/96C07C31/205
    • An alkylene carbonate and an alkanol are subjected to transesterification to yield a dialkyl carbonate and alkanediol in a process comprising (a) the alkylene carbonate and an alkanol feedstock are introduced into a reaction zone to react in the presence of a transesterification catalyst to yield an alkanediol-rich stream and a stream comprising dialkyl carbonate and alkanol, which streams are separated; (b) the stream comprising dialkyl carbonate and alkanol is passed to an extractive distillation zone in which an extractant is added to the stream; (c) from the extractive distillation zone an alkanol-rich vapour stream is obtained and a bottom stream containing the extractant and the dialkyl carbonate; (d) the bottom stream from step (c) is separated in a second non-extractive distillation zone to yield a dialkyl carbonate-rich top stream and a extractant-rich bottom stream; (e) the extractant-rich bottom stream is at least partly recycled to the extractive distillation zone, wherein the extractant-rich bottom stream is used as heat source for the alkanol feedstock. The process is suitable for the production of propylene glycol and dimethyl and diethyl carbonate from propylene carbonate and methanol or ethanol, respectively.
    • 将碳酸亚烷基酯和链烷醇进行酯交换反应,得到碳酸二烷基酯和链烷二醇,该方法包括(a)将碳酸亚烷基酯和链烷醇原料引入反应区,在酯交换催化剂存在下进行反应得到链烷二醇 并且包含碳酸二烷基酯和链烷醇的物流,该物流被分离; (b)将包含碳酸二烷基酯和链烷醇的料流送入萃取蒸馏区,其中将萃取剂加入料流中; (c)从萃取蒸馏区获得富链烷醇蒸气流,含有萃取剂和碳酸二烷基酯的塔底料流; (d)来自步骤(c)的底部物流在第二非萃取蒸馏区中分离以产生富含二烷基碳酸盐的顶部物流和富含萃取剂的底部物流; (e)富萃取剂底部料流至少部分地再循环到萃取蒸馏区,其中富萃取剂底部料流用作链烷醇原料的热源。 该方法适用于分别从碳酸亚丙酯和甲醇或乙醇生产丙二醇和碳酸二甲酯和碳酸二乙酯。
    • 4. 发明申请
    • PROCESS FOR THE PREPARATION OF AN ALKANEDIOL AND A DIALKYL CARBONATE
    • 制备阿尔卡尼醇和碳酸二乙酯的方法
    • WO2007096342A1
    • 2007-08-30
    • PCT/EP2007/051585
    • 2007-02-20
    • SHELL INTERNATIONALE RESEARCH MAATSCHAPPIJ B.V.VAN DER HEIDE, EvertNISBET, Timothy MichaelVAPORCIYAN, Garo Garbis
    • VAN DER HEIDE, EvertNISBET, Timothy MichaelVAPORCIYAN, Garo Garbis
    • C07C68/06
    • C07C68/065Y02P20/127C07C69/96
    • An alkanediol and a dialkyl carbonate are prepared in a process comprising: (a) contacting an alkylene carbonate with an alkanol feedstock under transesterification conditions in a reactive distillation zone to obtain a top stream comprising dialkyl carbonate and the alkanol and a bottom stream comprising the alkanediol; (b) separating the top stream comprising dialkyl carbonate and the alkanol into an alkanol-rich stream and a dialkyl carbonate-rich stream; (c) recovering the dialkyl carbonate, optionally after further purification, from the dialkyl carbonate-rich stream; and (d) recycling at least part of the alkanol-rich stream to the reactive distillation zone as part of the alkanol feedstock, wherein the alkanol-rich stream is split in at least two portions, and at least one portion is condensed and freed from compounds with a lower boiling point than the alkanol. The process is especially suitable for the production of propylene glycol and dimethyl carbonate from propylene carbonate and methanol.
    • 制备烷基二醇和碳酸二烷基酯的方法包括:(a)在反应蒸馏区中在酯交换反应条件下使烯烃碳酸酯与链烷醇原料接触,以获得包含碳酸二烷基酯和链烷醇的顶部料流和包含链烷二醇 ; (b)将包含碳酸二烷基酯和链烷醇的顶部料流分离成富链烷醇流和富含碳酸二烷基酯的料流; (c)任选地进一步纯化后从富含碳酸二烷基酯的流中回收碳酸二烷基酯; 和(d)作为链烷醇原料的一部分将至少部分富含链烷醇的料流再循环至反应性蒸馏区,其中富链烷醇流分成至少两部分,并且至少一部分被冷凝并从 沸点低于链烷醇的化合物。 该方法特别适用于从碳酸丙烯酯和甲醇生产丙二醇和碳酸二甲酯。
    • 10. 发明申请
    • PROCESS FOR THE PRODUCTION OF ALCOHOLS FROM BIOMASS
    • 生物质生产酒精的方法
    • WO2012088108A1
    • 2012-06-28
    • PCT/US2011/066150
    • 2011-12-20
    • SHELL OIL COMPANYSHELL INTERNATIONALE RESEARCH MAATSCHAPPIJ B.V.VAN DER HEIDE, EvertCHHEDA, Juben Nemchand
    • VAN DER HEIDE, EvertCHHEDA, Juben Nemchand
    • C12P7/10
    • C12P7/10C12P19/02C12P19/14C12P2201/00Y02E50/16
    • Alcohols useful as fuel compositions are produced from biomass by pretreating the biomass prior to hydrolysis and fermentation. In the pretreatment, the biomass is contacted with an aqueous solution containing a dilute acid with concentration of up to 10wt% producing a predigested stream containing an aqueous liquor that contains at least a portion of hemicelluloses and a residual biomass that contains celluloses and lignin; separating at least a portion of the aqueous liquor from the residual biomass providing an aqueous liquor stream and a pre-digested biomass stream; then contacting the pre-digested biomass stream with a cooking liquor containing at least one alkali selected from the group consisting of sodium hydroxide, sodium carbonate, sodium sulfide, potassium hydroxide, potassium carbonate, ammonium hydroxide, and mixtures thereof and water. A process that allows for higher recovery of carbohydrates and thereby increased yields is provided.
    • 可用作燃料组合物的醇通过在水解和发酵之前预处理生物质由生物质产生。 在预处理中,生物质与含有浓度高达10重量%的稀酸的水溶液接触,产生含有含有至少一部分半纤维素和含有纤维素和木质素的残余生物质的含水液体的预消化流; 从剩余生物质中分离至少一部分含水液体,提供含水液体流和预消化的生物物流; 然后将预消化的生物物流与含有选自氢氧化钠,碳酸钠,硫化钠,氢氧化钾,碳酸钾,氢氧化铵及其混合物和水中的至少一种碱的蒸煮液接触。 提供了允许碳水化合物更高回收率并由此提高收率的方法。