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水溶性高分子颜料分散剂合成的探讨
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作者 王兴国 《华东科技(综合)》 2020年第2期42-42,共1页
水溶性有机颜料在现代生产生活中得到了广泛应用,分散剂作为颜料生产中的关键因素,其高效化生产成为行业关注的重点。本文分析分散剂的结构和分类,并介绍一种更加经济可靠的分散剂合成工艺流程,试图缓解目前水溶性高分子颜料分散剂合成... 水溶性有机颜料在现代生产生活中得到了广泛应用,分散剂作为颜料生产中的关键因素,其高效化生产成为行业关注的重点。本文分析分散剂的结构和分类,并介绍一种更加经济可靠的分散剂合成工艺流程,试图缓解目前水溶性高分子颜料分散剂合成耗时长、成本高的局面,进而提高颜料生产效果。 展开更多
关键词 水溶性高分子颜料 分散剂合成 大分子单体法
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Effect of surfactants on dispersion property and morphology of nano-sized nickel powders 被引量:1
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作者 黄国勇 徐盛明 +1 位作者 李林艳 王学军 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2014年第11期3739-3746,共8页
Fine face-centered cubic (FCC) nickel powders were synthesized by liquid phase reduction with different surfactants. The products were investigated by scanning electron microscopy (SEM), laser particle size analyzer a... Fine face-centered cubic (FCC) nickel powders were synthesized by liquid phase reduction with different surfactants. The products were investigated by scanning electron microscopy (SEM), laser particle size analyzer and X-ray powder diffraction (XRD). The results indicate that the type, dosage and relative molecular mass of surfactants significantly impact the purity, dispersion property, particle size, size distribution and morphology of the products. The nonionic surfactants poly ethylene glycol (PEG) and polyethylene glycol sorbitan monostearate (Tween) showed better dispersing ability in the reaction system than the others. The optimal mass ratios of surfactant to Ni are 100 mg/g and 150 mg/g for PEG-600 and Tween-40, respectively. The products obtained in the optimal conditions have ideal morphology and narrow size distribution. Moreover, study on the relative molecular mass effect revealed that with the increase of the relative molecular mass of Tween, the morphology of nickel powders changed from sphere to spiny ball. 展开更多
关键词 nickel powder SURFACTANT DISPERSION MORPHOLOGY SYNTHESIS
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A highly stable and active mesoporous ruthenium catalyst for ammonia synthesis prepared by a RuCl_3/SiO_2-templated approach 被引量:7
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作者 Yaping Zhou Yongcheng Ma +4 位作者 Guojun Lan Haodong Tang Wenfeng Han Huazhang Liu Ying Li 《Chinese Journal of Catalysis》 SCIE EI CAS CSCD 北大核心 2019年第1期114-123,共10页
Molecular nitrogen is relatively inert and the activation of its triple bond is full of challenges and of significance.Hence,searching for an efficiently heterogeneous catalyst with high stability and dispersion is on... Molecular nitrogen is relatively inert and the activation of its triple bond is full of challenges and of significance.Hence,searching for an efficiently heterogeneous catalyst with high stability and dispersion is one of the important targets of chemical technology.Here,we report a Ba‐K/Ru‐MC catalyst with Ru particle size of 1.5–2.5 nm semi‐embedded in a mesoporous C matrix and with dual promoters of Ba and K that exhibits a higher activity than the supported Ba‐Ru‐K/MC catalyst,although both have similar metal particle sizes for ammonia synthesis.Further,the Ba‐K/Ru‐MC catalyst is more active than commercial fused Fe catalysts and supported Ru catalysts.Characterization techniques such as high‐resolution transmission electron microscopy,N2 physisorption,CO chemisorption,and temperature‐programmed reduction suggest that the Ru nanoparticles have strong interactions with the C matrix in Ba‐K/Ru‐MC,which may facilitate electron transport better than supported nanoparticles. 展开更多
关键词 Mesoporous carbon Semi‐embedded Ru/Carbon catalyst High dispersion Ammonia synthesis
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Effective recovery of chalcopyrite at low temperatures using modified ester collector 被引量:6
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作者 Xian-zhong BU Yuan-yuan FENG +2 位作者 Ji-wei XUE Lu YANG Chong-hui ZHANG 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2022年第1期296-306,共11页
The effect of a modified ester collector named as BL on the flotation of chalcopyrite at low temperatures was investigated by micro-flotation tests,contact angle measurements,adsorption experiments,laser particle size... The effect of a modified ester collector named as BL on the flotation of chalcopyrite at low temperatures was investigated by micro-flotation tests,contact angle measurements,adsorption experiments,laser particle size analysis,cryogenic transmission electron microscopy(Cryo-TEM)and Fourier transform infrared(FTIR)analyses.Micro-flotation tests proved that the collecting ability of BL for chalcopyrite was significantly better than that of N,N-diethyl dithiocarbamate propiononitrile ester(ester-105)at low temperatures.Combined with laser particle size,Cryo-TEM and FTIR analyses,it was found that the particle size of BL in water was smaller than that of ester-105,and the distributed density of BL was higher than that of ester-105 at low temperatures,indicating that BL dispersed well at low temperatures.Therefore,BL was more easily adsorbed on the chalcopyrite surface and improved the surface hydrophobic degree of chalcopyrite,which were also confirmed by the contact angle measurements and adsorption experiments. 展开更多
关键词 modified ester collector chalcopyrite flotation collecting ability DISPERSIVITY low temperature reagent synthesis
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Synthesis, characterization and application of a dispersant based on rosin for coal-water slurry 被引量:11
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作者 Li Junguo Zhang Guanghua +1 位作者 Shang Ting Zhu Junfeng 《International Journal of Mining Science and Technology》 SCIE EI 2014年第5期695-699,共5页
A rosin derivative and maleopimaric acid diethanolamide(MAD), was synthesized, characterized by FTIR and1 H NMR, and applied as dispersant for the coal-water slurry(CWS) prepared from Chinese Shenfu coal. The CWS appl... A rosin derivative and maleopimaric acid diethanolamide(MAD), was synthesized, characterized by FTIR and1 H NMR, and applied as dispersant for the coal-water slurry(CWS) prepared from Chinese Shenfu coal. The CWS application performance investigation shows that the MAD dispersant has better abilities in reducing CWS viscosity and stabilizing the slurry than a commercial dispersant—sulfonated naphthalene-formaldehyde condensate(SNF). The physicochemical property investigation of the two tested dispersants shows that the adsorption amount of the MAD at coal-water interface is much larger than that of SNF, and the MAD has better wetting property than the SNF on the coal surface. It indicated that the excellent capabilities of MAD are related to the adsorption mode of standing upright on the coal surface. Based on the above, the mechanism of dispersion and stabilization of the CWS prepared from MAD dispersant is presented. 展开更多
关键词 Rosin derivative Coal-water slurry Dispersant Adsorption
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Research on Synthesizing Disperser with Fraction of Anthracene Oil for Coal Water Slurry
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作者 吴国光 郭照冰 +2 位作者 武建军 解强 王晓春 《Journal of China University of Mining and Technology》 2003年第2期145-150,共6页
Experiment of synthesizing a disperser for coal water slurry (CWS) by using fractions of anthracene oil from high-temperature coal tar was performed. The orthogonal test was used to investigate the influence of temper... Experiment of synthesizing a disperser for coal water slurry (CWS) by using fractions of anthracene oil from high-temperature coal tar was performed. The orthogonal test was used to investigate the influence of temperature, time, quantity of sulfonation agent and condensation agent and the interaction of these factors on properties of the disperser. The result shows that the influence of temperature, time, quantity of sulfonation agent and condensation agent, and the interaction of sulfonation time and sulfonation agent has a significant influence on the properties of disperser. The optimal condition of synthesis is that in 150g of the fractions of anthracene oil, 40 mL of sulfonation agent is added and sulfonated for 3 h at 130℃, then, 10 mL of condensing agent is added and condensated for 1.5 h at 115 ℃. 展开更多
关键词 fractions of anthroacene oil SYNTHESIS CWS DISPERSER
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Synthesis of Silica-Dispersed NiMo Hydrodesulfurization Catalysts 被引量:2
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作者 Liu Di Liu Lihua +1 位作者 Li Guangci Liu Chenguang (State Key Laboratory of Heavy Oil Processing,CNPC Key Laboratory of Catalysis, China University of Petroleum,Qingdao 266555) 《China Petroleum Processing & Petrochemical Technology》 SCIE CAS 2010年第4期18-22,共5页
Silica-dispersed NiMo hydrodesulfurization catalysts were synthesized by the deposition-precipitation method. For comparative purposes, bulk NiMo catalysts were obtained by co-precipitation. The silica-dispersed NiMo ... Silica-dispersed NiMo hydrodesulfurization catalysts were synthesized by the deposition-precipitation method. For comparative purposes, bulk NiMo catalysts were obtained by co-precipitation. The silica-dispersed NiMo catalyst had highly active metals content. Silica was employed to disperse active metals for full utilization of active components. The BET analysis showed that the silica-dispersed NiMo catalysts had a high surface area (147.0 m2/g) and pore volume (0.27 mL/g), whereas the bulk NiMo catalysts exhibited a very low surface area (87.5 m2/g). Transmission electron microscopy results proved that the active components were dispersed on the SiO2 substrate. X-ray diffraction patterns of the silicadispersed NiMo catalyst and the bulk NiMo catalyst were indexed to NiMoO4. The hydrodesulfurization activity of silicadispersed NiMo catalysts was much higher than that of reference catalysts and could be up to twice greater than those of commercial NiMo alumina-supported systems per gram of catalyst. The activity testing results also demonstrated that the silica-dispersed NiMo catalyst was an effective hydrodesulflarization catalyst. 展开更多
关键词 HYDRODESULFURIZATION NIMO SIO2 GEL Surface area
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