PRODUCTION OF 2,4-HEXADIENOIC ACID AND 1,3-PENTADIENE FROM 6-METHYL-5,6-DIHYDRO-2-PYRONE
    82.
    发明申请
    PRODUCTION OF 2,4-HEXADIENOIC ACID AND 1,3-PENTADIENE FROM 6-METHYL-5,6-DIHYDRO-2-PYRONE 有权
    从6-甲基-5,6-二氢-2-吡喃酮生产2,4-二十六烷酸和1,3-二戊烯

    公开(公告)号:US20120116119A1

    公开(公告)日:2012-05-10

    申请号:US12943433

    申请日:2010-11-10

    IPC分类号: C07C51/09 C07C45/60 C07C1/22

    摘要: Described is a method of making sorbic acid, pentadiene, or 3-penten-2-one. The method includes partially hydrogenating 4-hydroxy-6-methyl-2-pyrone (HMP) to yield 5,6-dihydro-4-hydroxy-6-methyl-2H-pyran-2-one (4-DHMMP). Then, if 3-penten-2-one is desired, thermally decomposing the 4-DHMMP to yield 3-penten-2-one. If sorbic acid or pentadiene are desired, the 4-DHMMP is hydrogenated to yield 4-hydroxy-6-methyltetrahydro-2-pyrone (4-HMTHP). The 4-HMTHP is then dehydrated by contacting it with a solid acid catalyst to yield parasorbic acid (PSA). The PSA can then be ring-opened by contacting it with a solid acid catalyst. The reaction conditions of the ring-opening reaction can be controlled to yield sorbic acid and/or pentadiene.

    摘要翻译: 描述了制备山梨酸,戊二烯或3-戊烯-2-酮的方法。 该方法包括部分氢化4-羟基-6-甲基-2-吡喃酮(HMP),得到5,6-二氢-4-羟基-6-甲基-2H-吡喃-2-酮(4-DHMMP)。 然后,如果需要3-戊烯-2-酮,则热分解4-DHMMP以得到3-戊烯-2-酮。 如果需要山梨酸或戊二烯,则将4-DHMMP氢化,得到4-羟基-6-甲基四氢-2-吡喃酮(4-HMTHP)。 然后通过使其与固体酸催化剂接触来脱水4-HMTHP以得到异烟酸(PSA)。 然后可以通过使其与固体酸催化剂接触来使PSA开环。 可以控制开环反应的反应条件以产生山梨酸和/或戊二烯。

    Method for decomposition of ethers
    84.
    发明申请
    Method for decomposition of ethers 有权
    醚分解方法

    公开(公告)号:US20060229481A1

    公开(公告)日:2006-10-12

    申请号:US11104315

    申请日:2005-04-12

    IPC分类号: C07C1/207

    摘要: This invention relates to a method of making an olefin from a dialkyl ether comprising (a) introducing an ether having a formula CxH2x+1CyH2y+1 into a thermal or catalytic cracking unit processing a hydrocarbon feedstock; and (b) decomposing at least a portion of the ether to form an olefin having a formula CxH2x and/or CyH2y and an alcohol having a formula CxH2x+1 and/or CyH2y+1OH, wherein x and y independently range from about 1 to about 30. This invention also relates to a method of reducing coking in a thermal or catalytic cracking unit comprising (a) introducing an ether, having a formula CxH2x+1OCyH2y+1, into the cracking unit processing a hydrocarbon feedstock in an amount effective to reduce coke formation relative to processing the hydrocarbon feedstock in the absence of the ether, wherein x and y independently range from about 1 to about 30.

    摘要翻译: 本发明涉及一种由二烷基醚制备烯烃的方法,该方法包括:(a)引入具有式C x 2 H 2 x + 1 C y的醚, / 2> 2y + 1< / 2>到处理烃原料的热或催化裂化装置; 和(b)分解至少一部分醚以形成具有式C x H 2 H 2和/或C y H的烯烃 2y和具有式C x H 2 x + 1和/或C y y H的醇, 2y + 1H OH,其中x和y独立地在约1至约30的范围内。本发明还涉及在热或催化裂化单元中还原焦化的方法,其包括(a)引入具有式 C x 2 x + 1 O 2 H 2 y + 1 N,进入裂化装置中处理烃原料 相对于在不存在醚的情况下相对于处理烃原料而有效降低焦炭形成的量,其中x和y独立地为约1至约30。

    Cracking process for styrene
    86.
    发明授权
    Cracking process for styrene 失效
    苯乙烯的开裂过程

    公开(公告)号:US4250344A

    公开(公告)日:1981-02-10

    申请号:US954330

    申请日:1978-10-25

    CPC分类号: C07C15/46 C07C1/213

    摘要: A process for making styrene by the cracking of beta-phenethyl acetate wherein the beta-phenethyl acetate is derived from the esterification of beta-phenethyl alcohol. The latter is derived from the homologation of benzyl alcohol-benzyl acetate mixtures. The esterification of the beta-phenethyl alcohol may be partial because it has been found that up to 20% by weight of beta-phenethyl alcohol may be fed to the cracking step and also converted to styrene. Benzyl alcohol and benzyl acetate can also be fed to the cracking step because it has been found that they are essentially inert at cracking conditions.

    摘要翻译: 通过乙酸β-苯乙酯的裂解制备苯乙烯的方法,其中乙酸β-苯乙酯是由β-苯乙醇的酯化得到的。 后者衍生自苄醇 - 乙酸苄酯混合物的同系物。 β-苯乙醇的酯化可能是部分的,因为已经发现可以将高至20重量%的β-苯乙醇进料到裂化步骤中并且也转化为苯乙烯。 苄醇和乙酸苄酯也可以进料到裂化步骤,因为已经发现它们在裂化条件下基本上是惰性的。

    Method for producing isoprene
    88.
    发明授权
    Method for producing isoprene 失效
    异戊二烯生产方法

    公开(公告)号:US3890404A

    公开(公告)日:1975-06-17

    申请号:US33068773

    申请日:1973-02-08

    摘要: A method for producing isoprene which comprises reacting isobutene with a reactant selected from the group consisting of formaldehyde, isoprene glycol and its acid esters at a molar ratio of isobutene to reactant of 1 : 1 to 10 : 1 in a medium of water or its mixture with t-butanol in a liquid phase at a temperature of from 110*C to 180*C and under autogenetic pressure in contact with a catalyst which is an acidic substance under said reaction conditions, the concentration of the catalyst being 1 to 5 % by weight. By such method, isoprene is produced in an excellent yield.

    摘要翻译: 一种生产异戊二烯的方法,其包括使异丁烯与选自甲醛,异戊二醇及其酸酯的反应物在异丁烯与反应物的摩尔比为1:1至10:1的水或其混合物中反应 在叔丁醇的液相中,在110℃至180℃的温度下,在与所述反应条件下为酸性物质的催化剂接触的自发生压力下,催化剂的浓度为1〜5% 重量。 通过这种方法,可以以优异的产率生产异戊二烯。