News & Innovation Round-Up, April 25, 2011

Editor's note: Our offices were closed on Friday. Here's a quick, if belated, news and innovation round-up.

This Week on CW:

Dow Chemical is planning a major ethylene and propylene build-up.

Momentive Performance Materials is filing for an IPO worth over $860 million.

First-quarter profits at several companies were on the rise.

Private equity firm Rhone Capital is buying Evonik's carbon black business.

In innovation news…Cobalt Technologies is advancing its biobutanol platform. And ACC's Responsible Care program is considering its' next round of initiatives.

Around the Web:

Dallas is making biogas from sewage, in CleanTechnica.

Republicans and Democrats have increasingly divergent views on climate change, in Science Daily.