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Commercially Proven Technologies for Minimizing Air Toxics Emissions from Benzene, Cumene & Phenol Production Facilities

IP.com Disclosure Number: IPCOM000218550D
Publication Date: 2012-Jun-05

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Commercially-Proven Technologies for Minimizing Air Toxics Emissions From Benzene, Cumene, and Phenol Production Facilities

Hassan M. Gomaa


Product TechnologyManager, Environmental

And

Ahmed J. Allawi

Senior Process Engineer

The M.W. Kellogg Company

 P.O. Box 4557
Houston, TX 77210

U.S.A.

    Prepared For Presentation At
The Air and Waste Management Association

Annual Meeting Denver, Colorado June 1993


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ly required the

manufacturer to submit a statement describingthe nature and magnitude of emissions from the facility. After review, the declared emission rates would either be accepted as proposed, or emission reduction measures would be imposed.

   This study was motivated by two reasons. First, the clientwas considering plans to increase the nameplate capacity of the aromatics complex by 1520%. This expansion required an updated statement of emissions to be submitted. Second, the client was interested in determining the costs of implementing various pollution prevention measures. This study was, therefore, a precursor for developing an overall pollution reduction strategy for the complex.

   Kellogg's main objectives were to propose and evaluate credible, commercially- proven emissions control technologies that would achieve s ecific reductions in the levels of volatile or anic compounds (VOCs) and air toxics emitted om the complex. The em hasis

treatment. This paper presents highlights of this study and summarizes its main conclusions.

K

was placec fon recovery and recycle techniques in order to minimize the costs of end-o -pipe

   We begin this presentation with a brief discussion of the process chemistry and the sources of VOC and air toxics emissions.

The benzenek mene/phenol complex employs the traditional four-step phenol

Benzene is produced by the hydro-dealkylation Of c6 - c8 heart-cut:

production process13:

R

The aromaticfeedstock to the de-alkylation unit include pyrolysis gasoline and reformate.


(2) Cumene is produced by the alkylation of benzene with propylene over a catalyst:

H

CUMENE


I. INTRODUCTION

   The M.W. Kellogg Company was recently retained by a European chemical manufacturer to conduct an environmental study aimed at reducing emissions from an aromatics complex consisting of benzene, cumene, and phenol units.

   At the time of the study, European environmental standardsfor atmos heric emissionswere not quantified definitively. The regulatory authorities typica

P

0

P

0 (1)

BENZENE PROPYLENE


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A large excess of benzene is usually maintained in the cumene reactor to suppress the formation of undesirable side-products.


(3) Cumene hydroperoxide (CHP) is produced by the oxidation of cumene:

0-OH

cuMp#HMwy3pERoxIDE

(4) Phenol is produced by the cleavage of CHP:

0 -OH

CUMENE WDWP€ROXIM PHENOL

The above cleavagereaction results in the formation of acetone as a co-product.

   The main sources of VOC and air toxics emissions from a typical benzene/cumene/phenol complex are:

8 Oxidation Section Vents:...