脱墨技术及其在不同废纸回用中的应用

1概述 随着国内外印刷技术的高速发展，废纸种类有了很大的变化，激光打印和复印废纸占越来越多的比例，各种新型油墨如紫外光固化油墨、激光打印油墨和静电复印油墨、水性印刷油墨等，在组成和性质上都与传统油墨有了较大的差别，传统的脱墨技术越来越达不到脱墨要求。所有这些都要求和迫使人们在脱墨技术上不断改进、创新和提高。国内外在此方面进行了大量研究，并取得许多新的进展。下面就脱墨技术的发展及其在不同废纸回用中的应用作简要介绍。     

废纸制浆技术新进展

本文介绍了废纸制浆过程中供料技术、碎浆技术、筛选技术、脱墨技术、浮选技术、洗涤技术和污泥利用技术等方面在生产上的新发展。     

废纸制浆技术新进展

本文介绍了废纸制浆过程中供料技术、碎浆技术、筛选技术、脱墨技术、浮选技术、洗涤技术和污泥利用技术等方面在生产上的新发展。     

生物酶脱墨技术在文化纸中的应用

生物酶脱墨技术比传统的化学脱墨具有突出的优势。该文介绍的应用于大型文化纸脱墨的连续性生产实验表明：生物酶脱墨技术提高了脱墨浮选效率,减少了纤维流失,减少了脱墨化学品及污水处理化学品的用量,达到了提高生产效率、降低生产成本的目的。     

废纸制浆技术新进展

本文介绍了废纸制浆过程中供料技术,碎浆技术,筛选技术,脱墨技术,浮选技术,洗涤技术和污泥利用技术等方面在生产上的新发展。     

旧报纸脱墨的研究进展

介绍了新闻纸的主要印刷方式、不同印刷方式所用油墨的组成及其脱墨性能。针对目前回收废纸中柔版印刷(水基油墨)废纸比例的增大对旧报纸(ONP)脱墨带来的影响,重点介绍了水基油墨印刷废纸的脱墨化学品研究、脱墨工艺、脱墨废水的处理技术以及脱墨效果评价方法,对旧报纸的脱墨过程提出了一些建议。     

脱墨废纸浆在新闻纸生产的应用

我公司在新闻纸生产中使用以旧报纸和旧杂志为原料的脱墨废纸浆已取得十分显著的经济效益和技术效益。本文介绍了脱墨过程的基本化学原理、筛选技术和脱墨技术新动向。     

废纸脱墨化学及脱墨药剂专题资料介绍

近年来,废纸利用逐年增长,废纸处理技术飞速发展,关于废纸制浆、造纸技术的书籍、资料也不少,但是大多数只讨论设备与制浆。我部技术人员投入大量精力,有针对性地收集了有关废纸脱墨机理、脱墨化学及化学药剂的资料。 本资料着重介绍了脱墨工艺的表面化学现象、脱墨处理剂、脱墨剂的化学性质及脱墨剂的种类,并     

废纸脱墨工艺节能减排先进适用技术评估方法研究

针对国内环境技术评估以定性判断为主,缺乏综合评估方法的状况,通过设置节能减排先进适用技术指标体系、确定指标权重、构建评估因素集及其隶属函数等过程,建立基于层次分析和模糊综合评估的定性与定量方法相结合的造纸行业废纸脱墨工艺节能减排先进适用技术评估方法。应用该方法,在洗涤法脱墨技术、浮选法脱墨技术、浮选-洗涤法脱墨技术3项技术中,筛选出浮选法脱墨技术作为废纸制浆脱墨工艺重点推广的节能减排先进适用技术,其余两项技术中,洗涤法脱墨技术优于浮选-洗涤法脱墨技术。     

废纸脱墨及其废水处理

本文介绍了废纸脱墨以及脱墨废水的处理技术。文章对印刷油墨的种类和成分及其可脱墨性进行了分析，论述了油墨的各种成分对脱墨过程的影响，介绍了主要脱墨方法的特点。文章分析了脱墨废水中污染物的主要成分、总结了脱墨废水的处理方法。     

Reliable identification of grapevine rootstock varieties using RAPD PCR on woody samples

Since grapevine ( Vitis spp .) rootstock material is being traded increasingly as disbudded woody material a lack of distinctive morphological features on such material necessitates an alternative and reliable means of identification. Methods described here were developed for rapid and efficient extraction of DNA from woody samples rich in phenolic compounds and polysaccharides, and for subsequent identification of varieties by RAPD PCR. Using these methods, and with the application of only one selected RAPD primer, we were able to differentiate sixteen rootstock varieties, including the seven varieties most commonly used in Germany. Problems commonly encountered with reproducibility of RAPD patterns were avoided by choosing primers with a dinucleotide sequence and a high G/C content that allowed a rather high annealing temperature of 45°C. Methods described here should also be useful for other horticultural crops, especially those with woody tissues rich in phenolic compounds and polysaccharides.     

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.     

Aroma characterization of various apricot varieties using headspace–solid phase microextraction combined with gas chromatography–mass spectrometry and gas chromatography–olfactometry

The characterization of the aromatic profile of several apricot cultivars with molecular tracers in order to obtain objective data concerning the aromatic quality of this fruit was undertaken using headspace–solid phase microextraction (HS–SPME). Six apricot cultivars were selected according to their organoleptic characteristics: Iranien, Orangered, Goldrich, Hargrand, Rouge du Roussillon and A4025. The aromatic intensity of these varieties measured by HS–SPME–Olfactometry were defined and classified according to the presence and the intensity of grassy, fruity and apricot like notes. In the six varieties, 23 common volatile compounds were identified by HS–SPME–GC–MS. Finally, 10 compounds, ethyl acetate, hexyl acetate, limonene, β-cyclocitral, γ-decalactone, 6-methyl-5-hepten-2-one, linalool, β-ionone, menthone and (E)-hexen-2-al were recognized by HS–SPME–GC–O as responsible of the aromatic notes involved in apricot aroma and considered as molecular tracers of apricot aromatic quality which could be utilized to discriminate apricot varieties.     

Tests of potential functional barriers for laminated multilayer food packages. Part I: Low molecular weight permeants

The advent of the functional barrier concept in food packaging has brought with it a requirement for fast tests of permeation through potential barrier materials. In such tests it would be convenient for both foodstuffs and materials below the functional barrier (sub-barrier materials) to be represented by standard simulants. By means of inverse gas chromatography, liquid paraffin spiked with appropriate permeants was considered as a potential simulant of sub-barrier materials based on polypropylene (PP) or similar polyolefins. Experiments were performed to characterize the kinetics of the permeation of low molecular weight model permeants (octene, toluene and isopropanol) from liquid paraffin, through a surrogate potential functional barrier (25 μm-thick oriented PP) into the food simulants olive oil and 3% (w/v) acetic acid. These permeation results were interpreted in terms of three permeation kinetic models regarding the solubility of a particular model permeant in the post-barrier medium (i.e. the food simulant). The results obtained justify the development and evaluation of liquid sub-barrier simulants that would allow flexible yet rigorous testing of new laminated multilayer packaging materials.     

Analysis of benzo[a]pyrene in spiked fatty foods by second derivative synchronous spectrofluorimetry after microwave-assisted treatment of samples

A simple, rapid and inexpensive method has been developed for the determination of benzo[a     

The development of reference materials for paralytic shellfish poisoning toxins in lyophilized mussel. II: Certification study

This paper describes the second part of a project undertaken to develop certified mussel reference materials for paralytic shellfish poisoning toxins. In the first part two interlaboratory studies were undertaken to investigate the performance of the analytical methodology for several PSP toxins, in particular saxitoxin and decarbamoyl-saxitoxin in lyophilized mussels, and to set criteria for the acceptance of results to be applied during the certification exercise. Fifteen laboratories participated in this certification study and were asked to measure saxitoxin and decarbamoyl-saxitoxin in rehydrated lyophilized mussel material and in a saxitoxin-enriched mussel material. The participants were allowed to use a method of their choice but with an extraction procedure to be strictly followed. The study included extra experiments to verify the detection limits for both saxitoxin and decarbamoyl-saxitoxin. Most participants (13 of 15) were able to meet all the criteria set for the certification study. Results for saxitoxin.2HCl yielded a certified mass fraction of <0.07 mg/kg in the rehydrated lyophilized mussels. Results obtained for decarbamoyl-saxitoxin.2HCl yielded a certified mass fraction of 1.59+/-0.20 mg/kg. The results for saxitoxin.2HCl in enriched blank mussel yielded a certified mass fraction of 0.48 +/- 0.06 mg/kg. These certified reference materials for paralytic shellfish poisoning toxins in lyophilized mussel material are the first available for laboratories to test their method for accuracy and performance.     

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     

Chinese CTP Market

According to Printing and Printing Equipment Industries Association of China（PEIAC）＇s statistics to the plate manufucturer in China, in 2013, the actual offset plate production has reached 346 million square meters in China. Among them, the CTP production volume was 245 million square meters, up by 11% than that of last year; the total sales of the CTP plate was 239 million square meters, up by 13%.     

Preparatory Work of Print China 2015 is Going Smoothly

正Held at Guangdong Modern International Exhibition Center,Print China 2015 will cover 7exhibition halls,besides the original Hall No.3,4,5,6,7,the newly built F zone of Hall 3 will be used too.The total area will be140,000 square meters.Hall 3:Offset and large printing equipment,package printing equipment,post press