首页> 外国专利> Vanadium pent:oxide anatase-carrier catalyst for phthalic anhydride prepn. - prepd. by controlling amt. of titanium incorporated into vanadium-oxygen lattice and excluding alkali(ne earth) ions

Vanadium pent:oxide anatase-carrier catalyst for phthalic anhydride prepn. - prepd. by controlling amt. of titanium incorporated into vanadium-oxygen lattice and excluding alkali(ne earth) ions

机译：用于邻苯二甲酸酐制备的五氧化二钒：锐钛矿型载体催化剂。 -准备通过控制AMT。钛掺入钒氧晶格中，但不包括碱金属离子

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摘要

The characteristic features of a V2O5-anatase-carrier catalyst for use in phthalic anhydride prepn. from O2 and o-xylene are that (i) a fixed amt. of Ti ions is incorporated into the V-O lattice such that the catalyst has a pre-determined activity dependent on the Ti:V ratio; and (ii) there are no further unwanted foreign (pref. alkali(ne earth)) ions in the lattice. Catalyst prepn. is by conventional deposition onto anatase of a soln. of appropriate V:Ti ratio made by mixing together (A) a soln. of TiO2 hydrate gel in 0.1-0.5M oxalic acid soln. opt. contg. up to 0.01 mol/l HNO3, the gel having been obtd. by dissolving TiCl4 in semi-conc. HCl, neutralising with a diluted NH3 soln., and then centrifuging off the thus-obtd. TiO2 hydrate gel; and (B) a vanadyl oxalate soln. obtd. by dissolving upto 0.05 mol V2O5 in a 1-3M oxalic acid soln. ADVANTAGE - Catalysts of pre-determined activity can be obtd. in a simple reproducible process without the use of disruptive sulphate ions. The catalyst obtd. is such that there is a linear relationship between the pre-exponential coefft. of velocity of o-xylene oxidn. and the square root of the Ti:V atomic ratio.

机译：邻苯二甲酸酐制备中使用的V2O5-氧化酶载体催化剂的特征。来自O2和邻二甲苯的是（i）固定的amt。的Ti离子被引入到V-O晶格中，使得催化剂具有取决于Ti：V比的预定活性; （ii）晶格中没有其他不需要的外来离子（碱金属（碱土））。催化剂制备通过常规方法将其沉积在溶胶的锐钛矿上。通过混合（A）锡制成适当的V：Ti比TiO2水合物凝胶在0.1-0.5M草酸溶液中的合成选择。续最高至0.01 mol / l HNO3，该凝胶已被清除。通过将TiCl4溶解在半浓水中。 HCl，用稀NH3溶液中和，然后离心分离出如此沉淀的物质。 TiO2水合物凝胶; （B）草酸氧钒酯溶液。 t。通过将最高达0.05摩尔的V2O5溶解在1-3M草酸溶液中。优势-可以预定活性的催化剂。无需使用破坏性的硫酸根离子即可简单地重现。催化剂过大。使得指数前系数之间存在线性关系。二甲苯氧化速度的变化。和Ti：V原子比的平方根。

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公开/公告号DE4134292A1

专利类型
公开/公告日1992-10-29

原文格式PDF
申请/专利权人 TECHNISCHE HOCHSCHULE CARL SCHORLEMMER LEUNA-MERSEBURG O-4200 MERSEBURG DE;
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申请/专利号DE19914134292
发明设计人 KOPPE JUERGEN DR.RER.NAT. O-4212 SCHKOPAU DE;KRIPYLO PETER PROF. DR.SC.NAT. O-7010 LEIPZIG DE;FOGE JENS-PETER DIPL.-CHEM. O-4200 MERSEBURG DE;
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申请日1991-10-17
分类号B01J23/22;
国家 DE
入库时间 2022-08-22 05:25:30

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