Patent ID: 8052840

Claim:
A method of reducing resin from Kraft pulp comprising combining wood chips, Kraft pulping liquor and at least one triglyceride oil or triglyceride oil alkyl ester, and one or more compounds in category a) and optionally one or more compounds in category b) or mixtures thereof; a) poly(alkylene glycol)-based surfactant, b) rosin, rosin soap, tall oil, tall oil soap, or derivatives thereof, and cooking the resulting mixture in a Kraft pulping process, wherein one or more compounds in category a) comprises a poly(alkylene glycol)-based surfactant based on dioleate or ditallate that has a PEG segment with a molecular weight of greater than 400, and wherein the triglyceride oil and triglyceride oil alkyl ester comprises at least one of soybean oil, a fatty acid derivative of soybean oil, or mixtures thereof.