摘要:
A pretreated titanium silicalite with MFI structure (TS-1) catalyst which has been pretreated with methanol, and then optionally filtered and optionally air-dried to form a pretreated activated TS-1 catalyst. The activated TS-1 may be used in an epoxidation reaction with no additional methanol added and has equivalent activity to TS-1 used with large excesses of methanol. By removing the need for additional methanol during the reaction, the losses of epichlorohydrin from solvolysis are minimized significantly.
摘要:
Embodiments of the present disclosure include a process for removing iron ions from an organic stream by contacting the organic stream with an ion exchange resin prior to contacting the organic stream with a peroxide solution including a stabilizer.
摘要:
A process for preparing propylene oxide by epoxidizing propylene with an oxidant in the presence of a pretreated catalyst; wherein the catalyst comprises an activated titanium silicalite with MFI structure (TS-1) catalyst; and wherein the catalyst has been activated by pretreatment with methanol to form the pretreated catalyst. The pretreated TS-1 catalyst may be used in the epoxidizing propylene reaction with no additional methanol added; and the pretreated catalyst has equivalent activity to TS-1 catalyst used with large excesses of methanol.
摘要:
A pretreated titanium silicalite with MFI structure (TS-1) catalyst which has been pretreated with methanol, and then optionally filtered and optionally air-dried to form a pretreated activated TS-1 catalyst. The activated TS-1 may be used in an epoxidation reaction with no additional methanol added and has equivalent activity to TS-1 used with large excesses of methanol. By removing the need for additional methanol during the reaction, the losses of epichlorohydrin from solvolysis are minimized significantly.
摘要:
A multiple liquid phase composition and process for preparing propylene oxide including a reaction mixture of: (a) propylene, (b) at least one peroxide compound, (c) at least one catalyst, such as a titanium silicalite-1 (TS-I) catalyst, and (d) and a predetermined amount of a solvent mixture; wherein the solvent mixture comprises at least (i) at least one alcohol, such as methanol, and (ii) at least one non-reactive co-solvent; wherein the solvents are mixed at a predetermined concentration; wherein the non-reactive co-solvent has a different boiling point than propylene oxide; and wherein the resulting propylene oxide product partitions into a high affinity solvent during the reaction. The process of the present invention advantageously produces a waste stream with little or no significant amount of sodium chloride (NaCl).
摘要:
A multiple liquid phase composition and process for preparing an oxirane product, such as epichlorohydrin, including a reaction mixture of: (a) at least one olefin, wherein the olefin is selected from one of (i) an aliphatic olefin or substituted aliphatic olefin, with the proviso that the aliphatic olefin is not propylene, (ii) a cycloaliphatic olefin, (iii) an aromatic olefin, (iv) a cycloaromatic olefin, and (v) mixtures thereof; (b) at least one peroxide compound, (c) at least one catalyst, and (d) and a solvent mixture; wherein the solvent mixture comprises at least (i) at least one alcohol or a combination of alcohols, and (ii) at least one non-reactive co-solvent; wherein the solvents are mixed at a predetermined concentration; wherein the non-reactive co-solvent has a different boiling point than the oxirane product; and wherein the oxirane product partitions into a high affinity solvent during the reaction. The process of the present invention advantageously produces a waste stream with no significant amount of sodium chloride (NaCl). In one embodiment, the present invention includes a process for preparing epichlorohydrin from allyl chloride and hydrogen peroxide including reacting (a) an allyl chloride with (b) hydrogen peroxide, in the presence of (c) a titanium silicalite-1 (TS-1) catalyst and (d) in the presence of a predetermined amount of a mixed solvent system; wherein the mixed solvent system includes at least (i) methanol and (ii) at least one non-reactive co-solvent.
摘要:
Embodiments of the present disclosure provide processes and systems for the epoxidation of an olefin using a fixed bed reactor. The fixed bed reactor is maintained at a temperature from 0 to 40 degrees Celsius. The processes and systems regulate a superficial liquid velocity of a non-homogeneous reaction mixture and recycled portion of effluent of the fixed bed reactor.
摘要:
Embodiments of the present disclosure include a process for separating phases of a mixture including a liquid aqueous phase, a liquid organic phase, and a solid phase and extracting at least an oxirane from the liquid aqueous phase with an extraction solvent.
摘要:
A process for preparing propylene oxide by epoxidizing propylene with an oxidant in the presence of a pretreated catalyst; wherein the catalyst comprises an activated titanium silicalite with MFI structure (TS-1) catalyst; and wherein the catalyst has been activated by pretreatment with methanol to form the pretreated catalyst. The pretreated TS-1 catalyst may be used in the epoxidizing propylene reaction with no additional methanol added; and the pretreated catalyst has equivalent activity to TS-1 catalyst used with large excesses of methanol.
摘要:
Embodiments of the present disclosure include a process for separating phases of a mixture including a liquid aqueous phase, a liquid organic phase, and a solid phase and extracting at least an oxirane from the liquid aqueous phase with an extraction solvent.