PPD

[aka]

Подскажите пожалуйста, что такое PPD в следующем предложении:

A quantum innovation represents a radical departure from existing technology - the introduction of something that is new to the industry, such as soft nuclear treatment of heavy, waxy crude oil instead of PPD plus heating treatment.

вот еще:
In Kazakhstan, there are hundreds of PPD patents, but not a single Kazakhstani PPD could be found at the upstream, despite th fact that oil and oil-transport companies use annually thousands of tons of PPD's.

Спасибо большое,
Ака

[Кунделев]

это похоже на Paraffinic petroleum distillation...

[User]

PPD = pour-point depressant: вещество, понижающее температуру застывания.