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CN105307978A 由甲酰胺-催化剂合成氢氰酸的方法 无效 - 撤回

由甲酰胺-催化剂合成氢氰酸的方法
摘要：
通过在反应器中在催化剂的存在下将气态甲酰胺热解而制备氢氰酸的方法，其中：a)催化剂为：(i)氧化铝催化剂，其包含-90-100重量％，优选99-100重量％氧化铝作为组分A，-0-10重量％，优选0-1重量％二氧化硅作为组分B，和-0至至多0.1重量％铁或含铁化合物作为组分C，其中化合物A、B和C的总和为100重量％，具有(ii)根据DIN ISO 9277：2003-05测量为 1400℃的温度下热处理1-30小时，优选在≥1500℃下热处理1-30小时，特别优选在1500℃至1800℃下热处理2-10小时，且b)反应器具有对甲酰胺热解而言为惰性的内表面；催化剂在通过在具有对甲酰胺热解而言为惰性的内表面的反应器中将气态甲酰胺热解而制备氢氰酸的方法中的用途。
摘要（英）：

The invention relates to a method for producing hydrocyanic acid by the thermolysis of gaseous formamide in a reactor in the presence of a catalyst, wherein a) the catalyst (i) is an aluminum oxide catalyst, containing - 90 to 100 wt%, preferably 99 to 100 wt%, of aluminum oxide as component A, - 0 to 10 wt%, preferably 0 to 1 wt%, of silicon dioxide as component B, and - 0 to at most 0.1 wt% of iron or compounds containing iron as component C, wherein the total sum of components A, B, and C is 100 wt%, and (ii) has a BET surface area, measured as per DIN ISO 9277 : 2003-05, of 1 m2/g, and (iii) is tempered at temperatures of 1400 DEG C for 1 to 30 h, preferably >= 1500 DEG C for 1 to 30 h, especially preferably at 1500 DEG C to 1800 DEG C for 2 to 10 h, and b) the reactor has an inner surface that is inert with respect to the thermolysis of formamide; and use of the catalyst in a method for producing hydrocyanic acid by the thermolysis of gaseous formamide in a reactor that has an inner surface that is inert with respect to the thermolysis of formamide.

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