CN1171675C - 糠醛液相加氢制糠醇的催化剂及其用途 - Google Patents
糠醛液相加氢制糠醇的催化剂及其用途 Download PDFInfo
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Abstract
本发明公开了一种用于糠醛液相加氢制糠醇的催化剂及其用途，催化剂的各组份重量百分比为：CuO 36-42% Cr2O3 45-52% NiO 8-17%。催化剂装在反应釜内，反应温度180℃-200℃，反应压力3.5-5MPa，本发明的催化剂具有较高的活性，成本低，糠醛转化率大于99.2%，糠醇的选择性大于96%，使用方便，便于贮存等优点。
Description
所属领域：
本发明属于催化剂及其用途，具体地说涉及一种用于糠醛液相加氢制糠醇的催化剂及其用途。
背景技术：
糠醇是一种重要的有机化工中间体，主要应用于精细化工方面，可制乙酰丙酸(又名苹果酸)，各种性能的呋喃树脂(如糠醛树脂，呋喃I、II型树脂)，糠醇-尿醛树脂及酚醛树脂等；广泛用于建筑、铸造工业，特别是汽车工业中。
目前工业上制取糠醇都是采用糠醛催化加氢法生产。我国是糠醛生产大国，在糠醛深加工产品中，糠醇是价值很高的一种产品。
德国专利DE 3,425,758报导了CuO-Cr2O3和CuO/SiO2两部分催化剂混合组成，进行糠醛液相加氢制糠醇，反应条件温度150-300℃，反应压力2-10Mpa。因催化剂分为两部分，增加了制备过程的难度。
中国专利ZL 91103132.4，“生产糠醇用雷尼钴加氢催化剂及其制法”公开的催化剂的组成：钴35.1-46.5％，铝40.2-60.7％，铬4.2-13.3％。其活化方法为用20％的烧碱溶液进行抽铝反应，然后用蒸馏水清洗催化剂，使清洗液的PH值约7为至。在反应温度120℃，1Mpa的条件下进行糠醛液相加氢制糠醇，转化率大于99％。该催化剂制备过程中，需要大量的钴金属，增加了催化剂的费用；另外雷尼钴催化剂属自燃型，需保存在乙醇中，增加了使用难度。
发明内容：
本发明的目的在于提供一种成本低，使用方便的用于糠醛液相加氢制糠醇的催化剂及其用途。
本发明的催化剂各组份重量百分比为：
CuO 36-42％ Cr2O3 45-52％ NiO 8-17％。
本发明的催化剂是采用沉淀法制备的，具体步骤如下：
(1)按催化剂的组成CuO 36-42％，Cr2O3 45-52％，NiO 8-17％，配制成浓度为1-2M金属盐溶液；
(2)将金属盐溶液和碱性沉淀剂，在温度约60℃下，搅拌下混合，得到沉淀，搅拌时间为1小时，然后老化1-2小时；
(3)沉淀物经洗涤过滤，在100-120℃干燥12小时，并在300℃下焙烧4小时，最后碾磨即得催化剂。
本发明的催化剂是用于糠醛液相加氢制糠醇，将催化剂装在反应釜内，反应条件为温度180-200℃，压力3.5-5Mpa。
本发明与现有技术相比具有如下优点：
(1)催化剂制备过程简单。
(2)成本低，具有较高的活性和选择性，糠醛转化率大于99.2％，糠醇的选择性大于96％。
(3)使用方便，便于贮存。
具体实施方式：
实施例1
(1)催化剂制备过程：称取硝酸铜60.0g，铬酐33.0g，硝酸镍19.5g，将它们溶于约600ml去离子水中，配制成溶剂。将该溶剂和氨水沉淀剂在50-60℃下搅拌，混合得到沉淀，然后老化1.5hr，沉淀物经洗涤过滤，在110℃干燥12hr，并在300℃焙烧4hr。最后碾磨为小于120目的催化剂样品。
(2)反应性能：
称取5g催化剂(＜120目)和300ml糠醛装入高压不锈钢反应釜内，钢瓶氢气经定压稳压后，通过转子流量计进入反应釜中，在反应温度195℃，压力4MPa条件下，糠醛转化率99.20％，糠醇的择性96.8％。
实施例2
(1)催化剂制备过程：
称取硝酸铜57.0g，铬酐26.4g，硝酸镍25.4g，其它同实施例1。
(2)反应性能：
在185℃，4.5MPa条件下，糠醛转化率99.5％，糠醇选择性97.5％。
实施例3
(1)催化剂制备过程：
称取硝酸铜57.0g，铬酐31.1g，硝酸镍29.3g，其余同实施例1。
(2)反应性能：
在190℃，3.8Mpa的条件下，糠醛转化率99.4％，糠醇的选择性98.2％。
Claims (2)
1.一种用于糠醛液相加氢制糠醇的催化剂，其特征在于催化剂的各组份重量百分比为：
CuO 36-42％ Cr2O3 45-52％ NiO 8-17％。
2.如权利要求1所述的一种糠醛液相加氢制糠醇催化剂的用途，其特征在于催化剂装在反应釜内，反应条件为温度180-200℃，压力3.5-5Mpa。
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100531014C (zh) * | 2001-12-18 | 2009-08-19 | 意大利电信股份公司 | 电信系统中重新分配码的方法和相关系统及计算机产品 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102247860A (zh) * | 2011-08-03 | 2011-11-23 | 中国地质大学（武汉） | 硅胶载体上负载氧化铜加氢催化剂的制备方法 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN100531014C (zh) * | 2001-12-18 | 2009-08-19 | 意大利电信股份公司 | 电信系统中重新分配码的方法和相关系统及计算机产品 |
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