非木材纤维自催化乙醇制浆的特点

与传统化学制浆相比,非木材纤维自催化乙醇制浆的制浆工艺及成浆性能都有明显的特殊性.以荻原料为例,分别对其未漂浆的洗涤工艺、制浆过程中灰分的变化、纤维分离点、浆中木素含量与卡伯值的关系等的特殊性进行了分析和讨论.     

非木材纤维自催化乙醇制浆的研究进展

重点论述了非木材纤维原料自催化乙醇制浆的研究进展和研究成果。提出对乙醇法制浆新的认识和观点：乙醇制浆并非单纯的制浆方法,更精确讲是植物纤维原料综合利用的多产品分离法。同时,结合近年来出现的能将所有可利用原料转化成生物燃料或化学品的生物精制技术,从成本和利润方面看：将生物精制技术同乙醇制浆结合起来是一条有发展前景的途径。     

麦草酸催化乙醇法制浆工艺条件的优化

影响酸催化乙醇法制浆的主要因素有液比、蒸煮温度、乙醇浓度、催化剂用量和保温时间.本实验以麦秆为原料,从工艺角度对麦草酸催化乙醇法制浆进行初步研究.通过单因素分析优化酸催化乙醇法制浆工艺条件.     

乙醇制浆法和回收方法(APR)

早在1893年,在科学文献中曾报道用含水乙醇从木材中提取木素的试验,其大部份工作是由Aronovsky等人在1929—1939年期间进行的。乙醇制浆法的主要建议者T.N.Kleinert,在20世纪30年代初期就获得了一些专利。最近,Kleinert指出,用乙醇从木材中而不是从木粉中提取木素是可能的,亦即采用工业木片就能达到很快的制浆速率。但是,他没有提供乙醇制浆法的安全操作,乙醇的有效而经济的回收,或分离副产品木素和糖的适当的方式。     

环境保护部组织制定木材、非木材、废纸制浆工艺污染防治最佳可行技术指南征求意见稿

2011年6月,环保部组织相关单位编制完成了《造纸行业木材制浆工艺污染防治最佳可行技术指南(征求意见稿)》、《造纸行业非木材制浆工艺污染防治最佳可行技术指南(征求意见稿)》和《造纸行业废纸制浆工艺污染防治最佳可行技术指南(征求意见稿)》,分别对木材、非木材、废纸制浆工艺污染防治技术和制浆工艺污染防治最佳可行技术作了说明,目前正在向相关单位征求意见。     

木材硫酸盐半化学浆制浆技术

介绍了木材硫酸盐法半化学浆的生产工艺流程、制浆原理、蒸煮工艺条件、浆料特性和制浆废液的特点。     

非木材纤维和木材纤维爆破法制浆

介绍爆破法工艺在非木材和木材两原料在制浆机理工艺要求上的不同情况。     

非木材纤维原料乙醇制浆的发展前景与展望

从乙醇制浆的优越性和目前我国造纸用纤维原料的现状两方面分析了非木材纤维原料乙醇制浆的发展前景。另外,从成本和利润方面考虑,指出了将生物精制技术同乙醇制浆结合起来将是一条适合造纸业发展的道路。     

乙醇法制浆技术的应用与发展状况

介绍了有机溶剂法制浆中的乙醇法制浆,并对近年来世界范围内迅速发展起来的乙醇法制浆作了较详细的分类;同时介绍了不同原料的乙醇法制浆、乙醇法制浆中的溶剂回收及副产物利用,证明乙醇法是一种对环境影响较小而且能工业化生产的制浆方法。     

美开发一种新的制浆造纸方法

美国威斯康星大学的化学家发展了一种无硫制浆造纸的新方法。该法以醋酸、醋酸乙酯和水为混合溶剂制造纸浆不仅在投资上远低于传统的硫酸盐制浆法,同时在减少环境污染上也较为有利。新方法生产的纸浆的质量也优于传统制浆法的产品。 硫酸盐和亚硫酸盐制浆法多年来一直在造纸工业中占优势。但硫酸盐法投资大、成浆率低,而且污染环境。在过去几十年中人们一直在研究一系列替代工艺。前几年出现的乙醇制浆法,已达到中试阶段,是有可能取代硫酸盐法的新工艺。但该法也有能耗较大、乙醇     

Review of techniques to manufacture micro-hydrogel particles for the food industry and their applications

Microgels are ‘soft’ microscopic cross-linked polymeric particles that are being increasingly exploited in a variety of industries for rheology control, encapsulation and targeted delivery. They are valued because of the ability to tune their functionality to address specific applications in oil recovery, coatings, drug delivery, cosmetics, personal care and foods. Food microgels are typically biopolymer hydrogels in the form of microspheres, nanospheres (also called nanogels), spheroids and fibres. The utilisation of engineered microgels in foods has so far been limited, despite their great potential to address several needs in the food industry, including: satiety control, encapsulation of phytonutrients and prebiotics, texture control for healthier food formulations (e.g. reduced fat products), and targeting delivery to specific areas in the digestive tract. We review the scientific and patent literature on the utilisation and manufacturing methods for producing microgels with an emphasis on micro-hydrogels for food applications.     

12—A CRITIQUE OF SOME HYPOTHESES RELATING TO THE HETEROGENEITY OF THE HIGH-SULPHUR PROTEINS OF WOOL

Joubert and Burns prepared a large number of fractions from the high-sulphur proteins of wool and estimated their molecular weights and amino-acid compositions. Their data have been re-examined in order to look for statistically significant interrelations between amino acids and between the proportion of various amino acids and molecular weight. Statistical analysis of the data is also used to examine the credibility of some hypotheses concerning the mechanism of keratin biosynthesis and to provide further evidence for the existence of families of proteins within the high-sulphur fractions of wool.     

An internet compendium of analytical methods and spectroscopic information for monomers and additives used in food packaging plastics

An internet website (http://cpf.jrc.it/smt/) has been produced as a means of dissemination of methods of analysis and supporting spectroscopic information on monomers and additives used for food contact materials (principally packaging). The site which is aimed primarily at assisting food control laboratories in the European Union contains analytical information on monomers, starting substances and additives used in the manufacture of plastics materials. A searchable index is provided giving PM and CAS numbers for each of 255 substances. For each substance a data sheet gives regulatory information, chemical structures, physico-chemical information and background information on the use of the substance in particular plastics, and the food packaging applications. For monomers and starting substances (155 compounds) the infra-red and mass spectra are provided, and for additives (100 compounds); additionally proton NMR are available for about 50% of the entries. Where analytical methods have been developed for determining these substances as residual amounts in plastics or as trace amounts in food simulants these methods are also on the website. All information is provided in portable document file (PDF) format which means that high quality copies can be readily printed, using freely available Adobe Acrobat Reader software. The website will in future be maintained and up-dated by the European Commission's Joint Research Centre (JRC) as new substances are authorized for use by the European Commission (DG-ENTR formerly DGIII). Where analytical laboratories (food control or other) require reference substances these can be obtained free-ofcharge from a reference collection housed at the JRC and maintained in conjunction with this website compendium.     

Announcing a new international peer-reviewed journal:Food Science and Human Wellness now accepting manuscript submission in English

<正>We are pleased to announce the launch of a new international peer-reviewed journal-Food Science and Human Wellness,ISSN 2213-4530,which is an open access journal,produced and hosted by Elsevier B.V.on behalf of Beijing Academy of Food Sciences.Food Science and Human Wellness is an international peer-reviewed English journal that provides a forum for the dissemination of     

The Latest Data about Development of Chinese Printing Industry in 2013

In the 2014 China（Shanghai）International Printing Week,Director Wang Yanbin released the latest data about development of Chinese printing industry in 2013.According to statistics,in 2013,the total output value of Chinese printing industry exceeded 1trillion Yuan for the first time,reaching 1.03985 trillion Yuan.There were 105,000 printing enterprises in China,employees were 3.415 million.The total asset was 1.06247 trillion Yuan;     

The State Council Issued "Directory of Government Approved Investment Projects(2013 Edition)"

正On December 2nd,2013,the State Council issued the notification of"Directory of Government Approved Investment Projects(2013 Edition)"(hereafter referred to as"notification").It is pointed out in the"notification"that in order to further deepen reforms in investment systems and administrative examination and approval systems,simplify administrative procedures and delegate powers to lower levels,earnestly     

China textile machinery: taking off in progress

正Among the 1600 exhibitors who take apart in the ITMA ASIA+CITME2014 2/3 are Chinese manufactures.If the numerous figures failed to attract your attention,the increase of quality should draw your focus.To adopt the demand of developing textile machine market,domestic textile machinery enterprises now follow the slogan of"technology drives development"to enhance product competitiveness.Our domestic sellers will showcase product ranging from spinning,weaving,dyeing and printing,     

Top Ten News of China's Paper Industry 2013

On December 24th, 2013, the meeting on the selection of top 10 news of China＇s paper industry 2013 sponsored by 〈China Paper Newsletters〉 was held in Beijing. The yearly selection of the top l0 news, which began in 2000, has become a brand activity widely recognized in the industry thanks to the support from the authorities at all levels and public participation.     

National Development and Reform Commission Issued Announcement for Selection of Major Preliminary Research Projects for the "13~(th) Five-Year Plan"

In Apri Commi major p Plan＂ （h 2014, the National Development and Reform ssion issued an announcement for selection of reliminary research projects for the ＂13th Five-Year ereafter referred to as ＂The Announcement＂）     

Announcing a new international peer-reviewed journal:Food Science and Human Wellness now accepting manuscript submission in English

<正>We are pleased to announce the launch of a new international peer-reviewed journal-Food Science and Human Wellness,ISSN 2213-4530,which is an open access journal,produced and hosted by Elsevier B.V.on behalf of Beijing Academy of Food Sciences.Food Science and Human Wellness is an international peer-reviewed English journal that provides a forum for the dissemination of the latest scientific