%0 Journal Article %T Wheat Straw Pre-Extraction with Hot Water and the Recovered Pulping Liquor and Its Effects on Pulping and Paper Properties %J Nashrieh Shimi va Mohandesi Shimi Iran %I Iranian Institute of Research and Development in Chemical Industries (IRDCI)-ACECR %Z 1022-7768 %A Feyzmand, Mokhtar %A Resalati, Hossein %A Kermanian, Hossein %A Jalali Torshizi, Hossein %A Ramezani, Omid %D 2013 %\ 02/19/2013 %V 31 %N 3 %P 71-78 %! Wheat Straw Pre-Extraction with Hot Water and the Recovered Pulping Liquor and Its Effects on Pulping and Paper Properties %K Wheat straw %K Hot water pre-extraction %K Liquor recovering %K Soda-AQ pulping %R %X Hemicellulose pre-extraction and recovering before pulping process is an approach for supplying the sugar feedstock used in production of fuels and chemicals. Wheat straw hot water pre-extraction for reaching to 10 % weight loss was carried out in the present study. Pre-extracted liquor from each stage was used as a media for subsequent extraction stage (three stages) in pre-extraction process. The results showed that soda-AQ pulping of pre-extracted straw is performed at less severe conditions i.e. shorter time and lower temperature as compared to non-pre-extracted straw. The pulping yield of pre-treated straw was higher than control pulp; however, the total pulp yield (based on oven dried weight of raw straw) was lower in the pre-extracted samples. Due to lack of hemicelluloses, pre-extracted pulps showed a weaker response to refining and the produced handsheets had lower tear index and air resistant than handsheets made of non pre-extracted pulp, while no significant difference was noticed in burst and tensile indices of handsheets produced from extracted and non-extracted pulp samples.  %U https://www.nsmsi.ir/article_6990_2b4bb06a0af6277cf5613d38ff3c42c4.pdf