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Further development of dissolving pulp production processes

溶解浆生产工艺的进一步发展

基本信息

批准号：
455095-2013
负责人：
Ni, Yonghao
金额：
$ 5.7万
依托单位：
University of New Brunswick
依托单位国家：
加拿大
项目类别：
Collaborative Research and Development Grants
财政年份：
2015
资助国家：
加拿大
起止时间：
2015-01-01 至 2016-12-31
项目状态：
已结题

来源：
https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=575944
关键词：
Further development dissolving pulp production

项目摘要

This project is to establish collaboration of Dr. Yonghao Ni of the University of New Brunswick with Neucel Specialty Cellulose and AV Nackawic. The overall objectives are: 1) to improve the quality of dissolving pulps from the sulfite and pre-hydrolysis kraft-based dissolving pulps; 2) to decrease the manufacturing cost by optimizing the bleaching plant operation and using low-cost wood material. The Canadian dissolving pulp production capacity has been expanded significantly in recent years. The results from the project will be beneficial to this growing sector, in particular the industrial partners, AV Nackawic and Neucel Specialty Cellulose, by producing dissolving pulps with superior properties while optimizing the production cost; hence, enhancing the value and competitiveness of their dissolving pulp products in the international market. Therefore, the proposed program is of direct relevance to Canada. The project objectives/ deliverables include: - To develop the enzymatic pre-treatment technologies for brownstock aiming to produce high-purity dissolving pulp using xylanase or mannase and/ or mixture of xylanase/ mannase with glucanase for hardwood kraft-based and sulfite-based dissolving pulps; - To investigate the use of glucanase/mechanical treatments as post-treatment processes to improve the quality of dissolving pulps; - To explore the potential of fractionating the dissolving pulp and then applying the enzymatic treatment concept on different fractions, so that different grades of dissolving pulp can be produced; - To utilize the residual chlorite in the final chlorine dioxide stage by lowering the pH so that the bleaching cost can be decreased, and the pulp properties, such as pulp brightness and Fock reactivity, can be improved; - To develop the sulfite-based cooking technologies for using Douglas-fir, cypress, cedar, alder and beetle-killed pine, respectively, in compliance with current mill operating practice.

该项目旨在建立新不伦瑞克大学倪永浩博士与 Neucel Specialty Cellulose 和 AV Nackawic 的合作。总体目标是： 1）提高亚硫酸盐和预水解牛皮纸基溶解浆的质量； 2）通过优化漂白设备操作和使用低成本木质材料来降低制造成本。近年来，加拿大溶解浆产能显着扩大。该项目的成果将有利于这个不断发展的行业，特别是工业合作伙伴 AV Nackawic 和 Neucel Specialty Cellulose，通过生产具有优越性能的溶解浆，同时优化生产成本；从而提高其溶解浆产品在国际市场上的价值和竞争力。因此，拟议的计划与加拿大直接相关。项目目标/可交付成果包括： - 开发粗浆酶法预处理技术，旨在使用木聚糖酶或甘露聚糖酶和/或木聚糖酶/甘露聚糖酶与葡聚糖酶的混合物生产高纯度溶解浆，用于硬木牛皮纸基和亚硫酸盐基溶解浆； - 研究使用葡聚糖酶/机械处理作为后处理工艺来提高溶解浆的质量； - 探索对溶解浆进行分级，然后对不同分级应用酶处理概念的潜力，从而可以生产不同等级的溶解浆； - 通过降低pH值，利用最终二氧化氯阶段残留的亚氯酸盐，从而降低漂白成本，并改善纸浆性能，如纸浆白度和福克反应性； - 开发基于亚硫酸盐的蒸煮技术，分别使用花旗松、柏树、雪松、桤木和灭甲虫的松树，符合当前工厂的操作实践。