763-32-6Relevant articles and documents
A comparative study of an MCM-41 anchored quaternary ammonium chloride/SnCl4 catalyst and its silica gel analogue
Jyothi,Kaliya,Herskowitz,Landau
, p. 992 - 993 (2001)
A novel reusable Lewis acid catalyst has been prepared by the heterogenization of a Lewis acid/tetrapropylammonium adduct; anchoring of tin chloride on quaternary ammonium chloride functionalized MCM-41 yielded a catalyst with higher activity compared to the corresponding silica analogue in terms of turnover rates and product yield in the Prins condensation of isobutene and formaldehyde to isoprenol.
A Lewis acid catalyst anchored on silica grafted with quaternary alkylammonium chloride moieties
Jyothi, Thundi M.,Kaliya, Mark L.,Landau, Miron V.
, p. 2881 - 2884 (2001)
Resistance to leaching and re-usability are characteristic of the novel heterogeneous Lewis acid catalyst that was prepared by anchoring tin(IV) chloride on silica grafted with tetraalkylammonium or pyridinium chloride groups. The catalyst displays high activity and selectivity in the synthesis of 3-methyl-3-buten-1-ol by the Prins condensation of isobutene with formaldehyde [Eq. (1)].
Revisiting the Structural Evolution of Hydrotalcite-Derived Mixed Metal Oxides upon Alkali Metal Doping and Its Impact on Base Catalysis
Ding, Yunjie,Lin, Ronghe,Lv, Yali,Mou, Xiaoling,Yu, Qing
, (2021/12/24)
The structural evolution of classic coprecipitation-derived Mg?Al mixed oxide (MMO) upon doping of different alkali metals in a wide level (1–20 wt.%) was revisited. The pristine lateral MMO of aggregates into particulates, accompanied with the dramatic loss of the surface areas and the formation of aluminates. These phenomena become severer with the decrease of the atomic radius. The formation of NaAlO2 likely occurs via the gradual dealumination of the MMO, which is highly dependent on both the dopant content and the activation temperature. This leads to ultimately a new ensemble with MgO as the core decorated by NaAlO2 in the outer surfaces at high Na doping level and above 973 K. When evaluated in the base-catalyzed transesterification and acylation model reactions, the Na-doped MMO show enhanced performance and a plateau at increasing doping that might be explained by an interplay between the number and strength of strong basicity.
METHOD FOR PRODUCING GAMMA, DELTA-UNSATURATED ALCOHOL
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Paragraph 0107; 0111, (2020/03/09)
A method for producing a γ,δ-unsaturated alcohol of formula (2): wherein R1 to R3 each independently represent a hydrogen atom, an alkyl group having 1 to 10 carbon atoms and optionally substituted with a hydroxy group, an alkenyl group having 2 to 10 carbon atoms and optionally substituted with a hydroxy group, or an aryl group having 6 to 12 carbon atoms and optionally substituted with a hydroxy group, provided that R1 and R3 may bond to each other to form a ring, through a reaction of an α-olefin of formula (1) and formaldehyde under a heating condition: the method including a step of bringing the α-olefin into contact with an aqueous formaldehyde solution in the presence of an alcohol having 3 to 10 carbon atoms, with the aqueous formaldehyde solution being subjected to preheating at 30 to 220° C. before the step.
PROCESS TO RECOVER HIGH QUALITY 3-METHYL-BUT-3-EN-1-OL
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Page/Page column 13, (2020/04/25)
The presently claimed invention relates to a process for the recovery of 3-methyl-3-buten- l-ol from a stream obtained in the production of 3-methyl-3-buten-l-ol from 2-methylprop- 1-ene and formaldehyde, by treating the stream with an amine catalyst.
PROCESS TO RECOVER 3-METHYL-BUT-3-EN-1-OL
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Page/Page column 10-11, (2020/10/09)
The presently claimed invention relates to a process for the recovery of 3-methyl-3-buten- -ol from a stream comprising (Z)-3-methylpent-2-ene-1,5-diol, (E)-3-methylpent-2-ene-,5-dioland 3-methylenepentane-1,5-diolby treating the stream with isobutene and water.
PROCESS FOR RECOVERING 3-METHYLBUT-3-EN-1-OL
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Page/Page column 57, (2019/02/25)
The present invention relates to a process for recovering 3-methylbut-3-en-1 -ol from a feed stream F1 comprising 3-methylbut-3-en-1 -ol, one or more solvents, water, and isobutene, wherein 3-methylbut-3-en-1 -ol, the one or more solvents and water are separated from isobutene by distillation, the process comprising subjecting the feed stream F1 to distillation conditions in a distillation unit, obtaining a bottoms stream B1 which is enriched in -methylbut-3-en-1 -ol, in the one or more solvents and in water compared to the feed stream F1 subjec The present invention relates to a process for recovering 3-methylbut-3-en-1 -ol from a feed stream F1 comprising 3-methylbut-3-en-1 -ol, one or more solvents, water, and isobutene, wherein 3-methylbut-3-en-1 -ol, the one or more solvents and water are separated from isobutene by distillation, the process comprising subjecting the feed stream F1 to distillation conditions in a distillation unit, obtaining a bottoms stream B1 which is enriched in -methylbut-3-en-1 - ol, in the one or more solvents and in water compared to the feed stream F1 subjected to distillation conditions, and a top stream T1 which is enriched in isobutene, further subjecting the bottoms stream B1 to distillation conditions in a second distillation unit and obtaining a bottoms stream B2 which is enriched in 3-methylbut-3-en-1-ol compared to the bottoms stream B1 and a top stream T2 which is enriched in water compared to the bottoms stream B1, further subjecting the bottoms stream B2 to distillation conditions in a third distillation unit and obtaining a top stream T3 which is enriched in 3-methylbut-3-en-1-ol compared to the bottoms stream B2 and a bottoms stream B3. ted to distillation conditions, and a top stream T1 which is enriched in isobutene, further subjecting the bot- toms stream B1 to distillation conditions in a second distillation unit and obtaining a bottoms stream B2 which is enriched in 3-methylbut-3-en-1-ol compared to the bottoms stream B1 and a top stream T2 which is enriched in water compared to the bottoms stream B1, further subjecting the bottoms stream B2 to distillation conditions in a third distillation unit and obtaining a top stream T3 which is enriched in 3-methylbut-3-en-1-ol compared to the bottoms stream B2 and a bottoms stream B3.
A method for utilizing the isobutylene and methanol for preparing 3 - methyl -3 - butene -1 - ol (by machine translation)
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Paragraph 0040-0062, (2019/04/17)
The invention discloses a method of using isobutylene and methanol for preparing 3 - methyl - 3 - butene - 1 - ol, its steps mainly are: first nitrogen purging stainless steel high-pressure reaction vessel, replacing the air in the reaction vessel; the methanol liquid added in a reaction vessel, then the isobutylene gas into the reaction container, the high-pressure nitrogen pressurization, make isobutene liquefied, with methanol to form a mixed solution; adding a catalyst in a fixed bed, and then pumped to the isobutene with methanol mixed solution in a fixed bed, into the oxygen-containing gas to react, cooling discharging after completion of the reaction, distillation is 3 - methyl - 3 - butene - 1 - ol. The method of the invention using methanol instead of toxic formaldehyde, environment friendly, the preparation cost is reduced, simplifying the process, and using the fixed bed reactor, can be continuously produced, has high production efficiency and product quality. (by machine translation)
METHOD FOR PRODUCING CONJUGATED DIENE
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Paragraph 0065-0068, (2018/10/30)
A method for producing a conjugated diene, including a step A of allowing an α-olefin and formaldehyde to react with each other to produce a γ,δ-unsaturated alcohol in the presence of an alcohol; and a step B of subjecting the γ,δ-unsaturated alcohol to a dehydration reaction at 135 to 210° C. in the presence of an aqueous solution of an acidic catalyst.
PROCESS FOR PREPARING AN UNSATURATED ALCOHOL
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Page/Page column 35-36, (2018/09/21)
The present invention relates to a process for preparing an unsaturated alcohol, preferably 3,7- dimethyl-2,6-octadienal, by contacting an alkene, preferably isobutene, with formaldehyde in the presence a condensation catalyst comprising a zeolitic material comprising the framework structure of which comprises a tetravalent element Y other than Si.
