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Production of Roadway Deicer from Agriculture and Marin Wastes by Wet Oxidation

利用农业和海洋废弃物湿式氧化生产道路除冰剂

基本信息

批准号：
11793010
负责人：
ENOMOTO Heiji
金额：
--
依托单位：
Tohoku University
依托单位国家：
日本
项目类别：
Grant-in-Aid for University and Society Collaboration
财政年份：
1999
资助国家：
日本
起止时间：
1999 至 2000
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-11793010/
关键词：
Wet oxidation Organic wastes Agriculture wastes Marin Wastes Acetic acid Roadway deicer Calcium magnesium acetate 酢酸融雪・凍結防止剤

项目摘要

Significant results are summarized below :1 Batch study I-production of acetic acidPartial wet oxidation experiments of rice hulls and straw were performed over a wide range of conditions such as temperature varying from 300 to 400℃, reaction time from 1 to 2 min and H_20_2 supply from 50 to 110%, to obtain a high concentration acetic acid. Results show that a high acetic acid concentration can be obtained by controlling oxidation conditions, and the highest acetic acid yield, 12% on TOC/TOC basis, was obtained under the condition of 300℃, 1 min and H_20_2 supply of 70%.2 Batch study II-production of calcium/magnesium acetateAcetic acid produced by the wet oxidation of rice hulls/ straw can be easily converted to calcium/magnesium acetate by mixing with oyster shells/industrial Mg wastes. The conversion efficiency of acetic acid to calcium/magnesium acetate achieved >99% within 10 minutes.3 Batch study III-promotion of acetic acid yieldA new two-step reaction process, with the first step reaction for dehydration of monosaccharides, produced from polysaccharides by hydration, to form 5-hydroxymethyl furfural (5HMF) and 2-furaldehyde (2FA), and with the second step reaction for oxidizing 5HMF and 2FA to acetic acid, was developed. Acetic acid yield obtained by the two-step reaction process is twice higher than that by a usual wet oxidation (the method used in batch study II).4 Continuous-flow studyThe continuous-flow production system was set up and adjusted, and it has been operated at a stable state for a sufficiently long time. Operating condition for producing high acetic acid yield was obtained. Acetic acid yield obtained under the condition is almost the same as that in the batch study II.

短句来源对稻壳和秸秆进行了部分湿氧化实验，在温度300 ~ 400℃，反应时间1 ~ 2 min， H_20_2用量50% ~ 110%的条件下，得到了高浓度的乙酸。结果表明，通过控制氧化条件可获得较高的乙酸浓度，在300℃、1 min、H_20_2用量为70%的条件下，乙酸得率最高，TOC/TOC为12%短句来源间歇式生产钙/醋酸镁稻壳/秸秆湿氧化法生产的乙酸与牡蛎壳/工业废镁混合，可很容易地转化为钙/醋酸镁。乙酸在10分钟内转化为醋酸钙/醋酸镁的效率达到99%开发了一种新的两步反应工艺，第一步反应为单糖脱水，由多糖水合生成5-羟甲基糠醛（5HMF）和2-呋喃醛（2FA），第二步反应为5HMF和2FA氧化生成乙酸。通过两步反应得到的乙酸产率比通常的湿式氧化法（批量研究II中使用的方法）高两倍连续流研究连续流生产系统的建立和调整，已在稳定状态下运行了足够长的时间。获得了高乙酸产率的操作条件。在此条件下得到的乙酸产率与间歇式研究二的产率基本相同。