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Brazoria County, Texas

Chevron Phillips Chemical complex in Sweeny, Texas



In Brazoria County, TX, Chevron Phillips Chemical has its second largest manufacturing facility and includes three sites: Sweeny, Clemens and Old Ocean. 

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The Chevron Phillips Chemical Sweeny Complex has been in operation since 1944. Located 50 miles southwest of Houston, the facility is adjacent to the Phillips 66 Refinery. The Sweeny Complex is one of the world’s largest single-site ethylene facilities, capable of producing over 11 million pounds of ethylene per day. 

Old Ocean

Adjacent to the Sweeny Complex, the Old Ocean facility has two world-scale polyethylene units. The new units are each capable of producing 500,000 metric tons — 2.2 billion pounds — of plastic resin annually. The Old Ocean Rail Operation Facility supports the new polyethylene units with full and empty railcar storage and staging, railcar maintenance, and other transportation functions. At a length of five miles, it has the capacity to store over 1,500 railcars. The new Chevron Phillips Old Ocean Warehouse serves the ethylene, polyethylene and NGL units to provide bagging and tagging of daily maintenance, project material, and storage of critical spares, consumables and tools.

Clemens Terminal 

The Clemens Terminal is located 12 miles south of Sweeny, TX. The salt dome facility is used for brine production and storage operations. 

Product Information

Product made at Sweeny include:

  • Ethylene
  • Propylene
  • NGL fractionation

Products made at Old Ocean include:

  • High-density polyethylene
  • Linear low-density polyethylene


We believe in working safely or not at all. That’s why safety is our top priority at all our facilities. We create products and services that make life better for people around the world — both today and tomorrow. We strive to manufacture, handle, transport and dispose of chemical products 100 percent safely.


Chevron Phillips Chemical is committed to being a good neighbor to the communities where we operate. Part of our corporate vision and mission is to be an employer and neighbor of choice because we care about each other, our work, our customers and our communities. We actively support our neighboring communities through the following programs:

  • Texas Alliance of Minorities in Engineering (TAME)
  • Educational Institutions
  • County Fairs
  • Junior Achievement of Brazoria County
  • United Way of Brazoria County and Matagorda County
  • Donations to three local hospitals to help provide healthcare
  • Environmental initiatives: Friends of Brazoria Wildlife Refuges, Friends of the River San Bernard, and Texas Adopt-a-Beach Clean-up


The Sweeny, Clemens and Old Ocean facility cares deeply about the environment and aims to be a leader in sustainability in the community and beyond. This facility is a member of Operation Clean Sweep® Blue, a program representing a rigorous commitment to eliminating resin pellet, flake and powder loss, and keeping these materials out of the environment.