IHS Customer Logins

Obtain the data you need to make the most informed decisions by accessing our extensive portfolio of information, analytics, and expertise. Sign in to the product or service center of your choice.

Top Sites

PEP Review 2010-10

Lummus/CB&I Hexene-1 from C4 Process (Comonomer Production Technology)

Published : Dec 01, 2010

Lummus/CB&I has demonstrated, at the continuous semi-commercial plant scale (2 kty with Tianjin Petrochemical Company of China), an integrated process for producing hexene-1 from refinery and chemical plant by-product mixed C4 feedstocks. An intermediate product in the process is commercial grade butene-1, which is the predominant comonomer for producing LLDPE. The Lummus technology uses metathesis chemistry to produce a mixture of 1 mol each of ethylene and hexene-3 from 2 mols of butene-1, separates the intermediate products, then isomerizes the hexene-3 to hexene-1 product. Hexene-1 is used primarily as comonomer for producing LLDPE using low temperature, low pressure technology such as the Unipol® process.

Using a combination of Lummus-provided technical information, plus patent literature, SRIC has developed Class-3 process information, and the corresponding capital and manufacturing costs for a fully continuous, grassroots plant to produce 100 kty of hexene-1. We then used this information to prepare factored estimates for a plant with 50 kty hexene-1 capacity and 200 kty hexene-1 capacity. The hexene-1 capital and manufacturing cost estimates are provided below.

50 kty

100 kty

200 kty

Total Fixed Capital Cost (US$-MM)

99.2

151.7

233.0

Total Manufacturing Cost (US$/mt)

1,003.2

908.5

843.9

Cash Manufacturing Cost (US$/mt)

804.9

756.7

727.4

Based upon these results, we believe that the Lummus process is commercially viable for a customer that has access to C4 feedstocks priced at naphtha parity, and wishes to produce a combination of hexene-1 (price = US$1,475/mt) and/or butene-1 as LLDPE comonomer without being burdened by the responsibility for managing a wider business selling the other carbon number linear alpha-olefin (LAO) cuts produced by a conventional wide range LAO process. The one caveat for this conclusion is that the customer has access to a steam cracker for purifying and disposing of the other process by-products at reasonable prices.

Filter Sort