ONP/OMG中性脱墨工艺条件

利用自制的中性脱墨剂对在ONP/OMG中性脱墨过程中影响脱墨效果的各工艺条件进行了研究。结果表明,当碎浆温度为70℃,碎浆浓度为5.0%,碎浆时间为20min,熟化时间为15min,浮选温度为50℃,浮选浓度为1.0%,浮选时间为8min,洗涤2次,脱墨剂用量为0.75%时,ONP/OMG中性脱墨效果很好,此时脱墨浆的白度可达到68.5%,残余油墨粒子浓度减小到186mg·kg-1。     

新型臭氧/氧气浮选脱墨

对废胶版印刷纸(OOP)和由旧报纸与旧杂志纸组成的混合废纸(ONP/OMG,各50%)2种废纸原料进行传统的空气浮选和臭氧/氧气(O_3/O_2)浮选脱墨。与空气浮选相比,O_3/O_2浮选可提高废纸浆的油墨去除率,降低浮选损失及脱墨废水COD,且浮选选择性好。ONP/OMG浆的浮选损失较OOP浆大,这是因为其油墨去除率更高且释放出的表面活性剂形成了泡沫,产生了更多的污泥残渣。空气浮选和O_3/O_2浮选的浮选动力学均符合为一级动力学方程。与传统碱性空气浮选(添加NaOH、Na_2SiO_3、H_2O_2)相比,采用只添加Na_2SiO_3和H_2O_2的O_3/O_2浮选时,ONP/OMG浆的脱墨效果更好。减少碱性化学品用量可节约成本且具有环境效益。因此只添加Na_2SiO_3和H_2O_2的O_3/O_2浮选很有应用潜力。     

聚氧乙烯醚磷酸酯用于ONP／OMG中性脱墨的研究

使用OP-10磷酸酯和AEO-9磷酸酯及其与其他表面活性剂的复配物对旧新闻纸(ONP)/旧杂志纸(OMG)混合废纸进行了中性脱墨实验。结果发现:OP-10磷酸酯和AEO-9磷酸酯在中性条件下,具有较好的脱墨效果;它们在与其他表面活性剂的复配时,具有较强的选择性;平平加O-20/平平加A-20/JFC/OP-10磷酸酯的组合在中性条件下对ONP/OMG混合废纸具有良好的脱墨作用,可以使脱墨浆白度提高10.0%ISO。     

废纸脱墨技术的最新进展

废纸制浆的目的是分散纤维、将油墨从纤维上分离并将油墨颗粒打散成台适的大小．以便在后续工序中可以有效地去除．旧报纸即使在中性条件下疏解也很快，在实验室浮选脱墨研究中，以70％ONP和30％OMG为原斟，通过提高碎浆浓度、pH值．降低碎浆温度和提高浮选温度以及延长浮选时间可以制得高白度和残留油墨浓度低的浆料。     

ONP/OMG浮选脱墨生产工艺探讨

简单地介绍了 ONP/OMG浮选脱墨化学品的组成、作用及南纸公司脱墨浆系统的特点及运行情况.     

对新旧ONP/OMG进行酶法脱墨的研究

将新的和人工老化的旧新闻纸(ONP)与旧杂志纸(OMG)按7:3的质量比混合,来检验3种商品酶的脱墨效果。在碎浆之前往废纸中加入酶,放入摇床反应3h。虽然这些酶能够从ONP/OMG中脱除大量的油墨,但是亚硫酸盐或碱性的脱墨剂比纤维素酶脱墨剂的脱墨效果更好。这3种纤维素酶都不能将老化ONP/OMG中的油墨脱除,亚硫酸盐或碱性脱墨剂的脱墨性能也较差。但是,在亚硫酸盐脱墨剂中加入酶,脱墨效果能够得到明显地增强,为老化的旧新闻纸在中性pH条件下脱墨提供了可能性。     

混合办公废纸浮选脱墨工艺优化

研究碎浆时间、温度、浓度和碎浆机转速以及药品用量对办公废纸(MOW)浮选脱墨效果的影响。结果表明:在碎浆时加入脱墨化学品对提高白度、脱墨效率都非常重要;在优化碎浆和浮选的条件下,经一段浮选MOW脱墨浆的白度可以从77.5%ISO提高到84.8%ISO,残余油墨可由228.2mg·L-1下降到17.8mg·L-1。在此基础上,还探讨了研制的脱墨剂泡沫形成和破裂速度对浮选脱墨的影响。     

废纸脱墨剂的复配与中性脱墨工艺研究

本文以ONP/OMG混合废纸为脱墨对象,研究了几种脱墨常用的表面活性剂的中性脱墨性能。结果表明,在中性条件下非离子表面活性剂比阴离子表面活性剂有更好的脱墨性能,其中辛基酚聚氧乙烯醚OP-10与脂肪酸甲酯乙氧基化物FMEE的脱墨效果最好。将OP-10与FMEE以6:4的质量百分比复配后,可以获得最佳的协同增效作用,以此比例复配的脱墨剂用量0.25%,在中性条件下的脱墨工艺中可以使脱墨浆白度提高5.2%ISO,浮选后浆的ERIC值为147mg/kg,浮损率为6.7%。     

ONP/OMG浮选-洗涤脱墨条件的选择

首先通过正交实验研究了NaOH、Na2SiO3、H2O2和脱墨剂的用量对脱墨效果的影响,并确定了各自的用量,随后对其他主要脱墨条件进行了选择,确定了ONP/OMG浮选-洗涤脱墨的工艺条件.     

废纸脱墨剂的复配与中性脱墨工艺研究

本文以ONP/OMG混合废纸为脱墨对象,研究了几种脱墨常用的表面活性剂的中性脱墨性能。结果表明,在中性条件下非离子表面活性剂比阴离子表面活性剂有更好的脱墨性能,其中辛基酚聚氧乙烯醚OP-10与脂肪酸甲酯乙氧基化物FMEE的脱墨效果最好。将OP-10与FMEE以6∶4的质量百分比复配后,可以获得最佳的协同增效作用,以此比例复配的脱墨剂用量0.25%,在中性条件下的脱墨工艺中可以使脱墨浆白度提高5.2%ISO,浮选后浆的ERIC值为147mg/kg,浮损率为6.7%。     

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.     

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     

Contamination of animal feed and food from animal origin with mineral oil hydrocarbons

Oils and fats used for the production of animal feed can become contaminated with mineral oil material originating from gas oils (C₁₈-C₃₅) or synthetic oils (poly alpha olefins, C₂₅ to beyond C₄₅). An important cause is assumed to be the discharge of waste oils, such as motor oil and hydraulic oils. Mineral oil material was analysed by on-line LC-GC-FID directly in the fat or in a raw extract from animal feed or foodstuffs. In Switzerland in summer/autumn 1999 concentrations in oils and fats for feed production were often found to be between 100 and 1000mg/kg. In the feeds, the average concentration was around 100mg/kg with values ranging up to a maximum of 1000mg/kg; few samples were free of contamination. In animal body fat, the average concentration determined in summer 1999 was 25mg/kg, with a maximum of 150mg/kg, although in samples from December 1999, contamination was substantially lower. In the fat phase of eggs, the average concentration was 30mg/kg, with a maximum of 80mg/kg. Paraffin oil is used for feed production, which may account for part of the contamination problem (e.g. eggs).