Since H〓S and SO〓 adsorbed on TiO〓 could react with each other and TiO〓 is the medium of their electron transfer, thus SO〓 could not be adsorbed quite strong on the active site of TiO〓, which makes it more resistant to sulfating and increase the stability of catalyst. Finally, the model and mechanism of the reduction of SO〓 by NH〓 to elemental sulfur is advanced as follows: on the sulfide catalyst, ammonia is decomposed to N〓 and H〓, and H〓 reacts with SO〓 to form the intermedium of H〓S; then H〓S and SO〓 react as Claus reaction on TiO〓 catalyst.

反應(yīng)系統(tǒng)中過量水蒸氣的存在使催化劑表面某些活性位被水蒸氣抑制使活性和選擇性有較大幅度降低www.91精品.com，但這種影響是可逆的，不會(huì)造成催化劑永久性中毒麻豆啪啪视频；另外當(dāng)單質(zhì)硫和水蒸氣同時(shí)存在時(shí)伦理天堂百度影音在线观看网站，在〓催化劑上能夠生成硫化氫和二氧化硫，而且由于硫化氫和二氧化硫化學(xué)吸附能力不同而導(dǎo)致它們的脫附順序不同一级毛片久久w，硫化氫的生成溫度總是低于二氧化硫的生成溫度黄页免费视频大全，說明過量水蒸氣的存在會(huì)導(dǎo)致氧化物催化劑上逆克勞斯反應(yīng)的發(fā)生；而在硫化物催化劑上幾乎沒有硫化氫和二氧化硫生成色色色国产，說明硫化物催化劑能夠抑制逆克勞斯反應(yīng)的發(fā)生99精品A片一级视频。

The orthogonal experimental design was applied to investigate the effects of zirconia source Zr(NO34·5H2O, ZrOCl2·8H2O,precipitants and sulfating agent (sulfuric acid, ammonium sulfate) on the catalytic performance of the catalysts unde the most superior condition .The catalytic activity was tested in esterification of acetic acid with butanol .

在最優(yōu)的條件下用正交設(shè)計(jì)法考察鋯源（Zr(NO3)4·5H2O，ZrOCl2·8H2O）又爽又黄按摩视频免费、沉淀劑和硫酸化試劑對(duì)催化劑性能的影響日韩黄色网站www...，并通過乙酸和正丁醇的酯化反應(yīng)的酯化率檢測所制備的SO4/ZrO2催化劑的催化效果。

A novel superacid catalyst, SO〓/Zr-ZSM-11, has been prepared by sulfating the Zr-ZSM-11 and then calcined at high temperature.

通過硫酸化處理Zr—ZSM—11分子篩得到SO〓／Zr—ZSM—11固體超強(qiáng)酸催化劑下载黄色一级网站视频。

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Comparision national technolgical index of sulfating roaster with international ones,make some suggestions of innovating old roaster in Huludao zinc smelter for increasing enterprise economic profit.

通過比較國內(nèi)與國外酸化焙燒爐各項(xiàng)技術(shù)指標(biāo)差異黄色网站一012，提出葫蘆島鋅廠酸化焙燒爐優(yōu)化改進(jìn)意見，達(dá)到提高企業(yè)經(jīng)濟(jì)效益目的日韩av免费a片网站。

Different from the Lewis acidity nature of SO4(superscript 2-)/ZrO2/MCM-41, SO4(superscript 2-)/TiO2 and S2O8(superscript 2-)/TiO2 behave mainly Brnsted acidities. The strongest Brnsted acid sites are formed on SO4(superscript 2-)/TiO2 promoted with H2SO4, while Lewis acid sites on S2O8(superscript 2-)/TiO2 are even stronger than those on SO4(superscript 2-)/ZrO2/MCM-41, and the former which are generated when persulfate solution is used as sulfating agent.

與SO4(上標(biāo) 2-)/ZrO2/MCM-41主要表現(xiàn)為Lewis酸性不同你懂得福利影院在线观看，SO4(上標(biāo) 2-)/TiO2和S2O8(上標(biāo) 2-)/TiO2主要以Brnsted酸性為主，其中采用硫酸為促進(jìn)劑制備的SO4(上標(biāo) 2-)/TiO2具有最強(qiáng)的Brnsted酸性久久999wwwww，而采用過硫酸根作為促進(jìn)劑則使S2O8(上標(biāo) 2-)/TiO2產(chǎn)生較SO4(上標(biāo) 2-)/ZrO2/MCM-41更強(qiáng)的Lewis酸中心999超碰。

By sulfating synthesized Zr-HMS zeolite, a SO〓/Zr-HMS was prepared. It is proved that it possess superacidity by the experimental results of indicator method, NH〓-TPD, TG and IR.

硫酸化處理后制得SO〓／Zr—HMS，指示劑法測定它的酸強(qiáng)度大于-13.75欧美黄色A精品；NH〓—TPD欧美VA影院，TG和IR表征也證明它具有超強(qiáng)酸性国产超碰精品热久久91。

Uses in the ferrous metallurgy profession producing the oxidized iron ball group, Hard ore concentrate direct return to original state, superfine hard ore concentrate and high ashes recycling advantage; Available in carries on the oxidizing roasting in the colored metallurgy, reducing roasting, sulfating roasting, chlorination roasting, segregation roasting .etc.

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The methods of extracting and refining tellurium presently were mainly soda roasting,autoclaving in general basic solution,sulfating roasting,oxidative leaching in acid solution, solvent extraction ,emulsion liquid membrane,microbial method,electrorefining,vacuum distillation and zone melting etc.

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