DuBois Chemicals of Sharonville, Ohio, acquired Blue Star Lubrication Technology of Schaumburg, Ill.

Quaker Chemical Corp. and Houghton International Inc. executed a definitive agreement to combine the companies.

Houghton International Inc. acquired Wallover Enterprises, a metalworking fluid and industrial lubricant manufacturer based in Strongsville, Ohio.

Houghton International received approval from Pratt & Whitney, a United Technologies company, for the use of Hocut 4940 metalworking fluid.

Houghton International and SMS group announced an exclusive partnership to develop and distribute rolling oils for metal production.