Process for the alkylation of benzene with isopropanol or blends of isopropanol and propylene

An isopropanol and alkylation technology, applied in the field of alkylation, can solve the problems of environmental impact safety, complex catalyst use, etc., and achieve the effect of high productivity

Inactive Publication Date: 2011-08-31
POLIMERI EUROPA SPA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] However, based on the use of phosphoric acid and AlCl 3 There are problems with environmental impact and safety in the process of catalysts: the fact that the use of these catalysts is particularly complicated due to corrosion, by-products of toxic organic products and disposal of spent catalysts
It is interesting to point out, h

Method used

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  • Process for the alkylation of benzene with isopropanol or blends of isopropanol and propylene
  • Process for the alkylation of benzene with isopropanol or blends of isopropanol and propylene
  • Process for the alkylation of benzene with isopropanol or blends of isopropanol and propylene

Examples

Experimental program
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Effect test

Embodiment 1

[0074] Alkylation experiments with benzene were carried out with isopropanol using the experimental setup described below.

[0075]The test rig consisted of the following: tanks for the benzene and isopropanol reactants, feed pumps for feeding the reactants into the reactor, preheating means for the reactants, a steel reactor located in an electric furnace, temperature regulation inside the reactor loops, pressure regulation loops within the reactor, coolant for the reactor effluent, and collection systems for liquid and gaseous products.

[0076] In particular, the reactor consists of a cylindrical steel tube with a mechanical sealing system and a diameter equal to about 2 cm.

[0077] Along the larger axis of the reactor there is a thermometric cavity with a diameter equal to 1 mm, inside which is contained a thermocouple freely sliding along the larger axis of the reactor.

[0078] A catalyst comprising ZSM-12 zeolite prepared as described in Example 2 of WO 2003 / 0069459 w...

Embodiment 2

[0095] Embodiment 2 (comparison)

[0096] The results obtained in the preceding examples were compared with those obtained using a catalyst comprising zeolite beta prepared as described in Example 4 of EP 847802 .

[0097] Both catalysts of Example 1 and Comparative Example 2 contained about 50% active phase.

[0098] Using the same experimental setup as described in Example 1, operating under the same operating conditions, it was ensured that the reactants were in the gas phase and the product part was in the liquid phase.

[0099] Assignment of the physical state of the reactant mixture was performed as previously described in Example 1.

[0100] figure 2 The trends in molar selectivity [Ar] / [IPA] and molar selectivity [Cum] / [IPA] compared to catalyst productivity are depicted.

[0101] After about 160 hours of operation, the alcohol conversion had decreased by 2.5%. This value clearly indicates the greater stability and thus its higher productivity when using the catal...

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Abstract

The invention relates to a process for the alkylation of benzene with isopropanol (IPA) as alkylating agent, or blends of isopropanol and propylene, which comprises effecting said reaction completely in gaseous phase and in the presence of a catalytic system containing a zeolite belonging to the MTW family.

Description

technical field [0001] The present invention relates to a process for the alkylation of benzene with isopropanol (IPA) as alkylating agent or a mixture of isopropanol and propylene, comprising the use of catalytic systems comprising zeolites belonging to the MTW family entirely in the gas phase The reaction is carried out in the presence of . [0002] The process is characterized by the absence of adverse effects on the performance and lifetime of the catalyst due to the presence of high water content in the reaction mixture and by-products resulting from unfavorable reactions, as compared to the prior art for the same process It also provides much higher productivity than those provided by the catalyst. [0003] The absence of adverse effects is due to the particular catalytic system used which proves to be particularly suitable for the alkylation of benzene with the alkylating agent isopropanol or a mixture of isopropanol and propylene under the selected reaction conditions...

Claims

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Application Information

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IPC IPC(8): C07C2/86C07C15/02C07C39/04C07C45/53C07C49/08C07C409/10
CPCC07C2/864C07C2529/70C07C45/53C07C409/10C07C2/66C07C6/126C07C37/08C07C407/00Y02P20/52C07C15/085C07C49/08C07C39/04
Inventor L·洛伦佐尼P·卡拉雷苏P·G·卡布拉斯
Owner POLIMERI EUROPA SPA
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