Catalyst for use in producing lower aliphatic carboxylic acid ester, process for producing catalyst and process for producing lower alphatic carboxylic acid ester using the catalyst

Abstract

This article relates to a catalyst for producing a lower aliphatic carboxylic acid ester, wherein the catalyst is produced by a method including the step of contacting it with a gas containing at least one selected from the group consisting of water, lower aliphatic carboxylic acid and lower aliphatic alcohol. Production. This article also relates to methods of producing the catalyst, and methods of using the catalyst to produce lower aliphatic carboxylic acid esters. The catalyst can exhibit high initial activity and high space-time yield, ensure a sufficiently long catalyst life in industrial implementation, and can prevent the generation of by-product substances.

Description

[0001] Cross References to Related Applications

[0002] This application is an application filed under 35 USC § 111(a). This application claims priority under 35 USC § 119(e)(1) on the filing date of provisional application 60 / 218,803 filed June 18, 2000 under 35 USC § 111(b). technical field

[0003] The present invention relates to a catalyst for producing lower aliphatic carboxylic acid esters from lower olefins and lower aliphatic carboxylic acids, a method for producing the catalyst, and a method for producing lower aliphatic carboxylic acid esters using the catalyst.

[0004] More specifically, the present invention relates to catalysts for the production of lower aliphatic carboxylic acid esters. The catalyst contains a special heteropolyacid salt and is used in a method for producing a lower aliphatic carboxylic acid ester by esterifying a lower aliphatic carboxylic acid with a lower olefin, wherein the catalyst is mixed with water, a lower aliphatic carboxylic acid ...

Examples

Embodiment 1

[0231]

Embodiment 2 and 3

[0233] In the same manner as in Example 1, 50 ml of the catalyst obtained in the preparation method of Catalyst 1 was charged into a pressure-resistant vessel made of SUS 316L, and contacted under the contact conditions shown in Table 3. Thereafter, the catalyst was drawn out, charged into the reaction tube, and reacted in the same manner. The results are given in Table 3.

Embodiment 4

[0235] 40 ml of the catalyst obtained in the preparation method of Catalyst 2 was added to the reaction tube, and contact was performed under the contact conditions shown in Table 3. Subsequently, at a temperature of 165°C, 0.8 MPaG (gauge pressure) and 1,500 hours -1 A mixed gas of ethylene: acetic acid: steam: nitrogen (= 78.5: 8.0: 4.5: 9.0, volume ratio) was introduced thereinto for the reaction under the GHSV. The reaction results are given in Table 3.

[0001] Cross References to Related Applications

[0002] This application is an application filed under 35 USC § 111(a). This application claims priority under 35 USC § 119(e)(1) on the filing date of provisional application 60 / 218,803 filed June 18, 2000 under 35 USC § 111(b). technical field

[0003] The present invention relates to a catalyst for producing lower aliphatic carboxylic acid esters from lower olefins and lower aliphatic carboxylic acids, a method for producing the catalyst, and a method for producing lower aliphatic carboxylic acid esters using the catalyst.

[0004] More specifically, the present invention relates to catalysts for the production of lower aliphatic carboxylic acid esters. The catalyst contains a special heteropolyacid salt and is used in a method for producing a lower aliphatic carboxylic acid ester by esterifying a lower aliphatic carboxylic acid with a lower olefin, wherein the catalyst is mixed with water, a lower aliphatic carboxylic acid ...

Examples

Embodiment 1

[0231]

Embodiment 2 and 3

[0233] In the same manner as in Example 1, 50 ml of the catalyst obtained in the preparation method of Catalyst 1 was charged into a pressure-resistant vessel made of SUS 316L, and contacted under the contact conditions shown in Table 3. Thereafter, the catalyst was drawn out, charged into the reaction tube, and reacted in the same manner. The results are given in Table 3.

Embodiment 4

[0235] 40 ml of the catalyst obtained in the preparation method of Catalyst 2 was added to the reaction tube, and contact was performed under the contact conditions shown in Table 3. Subsequently, at a temperature of 165°C, 0.8 MPaG (gauge pressure) and 1,500 hours -1 A mixed gas of ethylene: acetic acid: steam: nitrogen (= 78.5: 8.0: 4.5: 9.0, volume ratio) was introduced thereinto for the reaction under the GHSV. The reaction results are given in Table 3.