Sept 2 (Reuters) - Dow said on Tuesday it has

sold an additional stake in its infrastructure venture to its

partner Macquarie Asset Management for $540 million as the

chemical maker looks to focus more on its core business.

The deal raises Macquarie's stake in the venture,

Diamond Infrastructure Solutions, to 49%, and brings Dow's total

proceeds from the transaction to about $3 billion.

The announcement is part of Dow's

earlier agreement

with the Australian asset management firm, through which

they created the venture to be an infrastructure provider to the

chemical maker and other industrial customers.

Earlier this year, the company closed a 40% stake sale in

some U.S. Gulf Coast infrastructure assets to a fund managed by

Macquarie for $2.4 billion.

Dow has been reevaluating its ownership of non-product

producing assets across its global portfolio, including power

and steam production and pipelines.

Diamond Infrastructure is an infrastructure provider to Dow

and other industrial customers at its five locations in Texas

and Louisiana.