CN111389455B - 一种液固相催化合成1-丁烯-3,4-二醇的方法 - Google Patents

一种液固相催化合成1-丁烯-3,4-二醇的方法 Download PDF

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CN111389455B
CN111389455B CN202010257332.3A CN202010257332A CN111389455B CN 111389455 B CN111389455 B CN 111389455B CN 202010257332 A CN202010257332 A CN 202010257332A CN 111389455 B CN111389455 B CN 111389455B
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butene
diol
metal salt
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傅人俊
薛冰
路珊
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Suzhou Qitian New Materials Co ltd
Changzhou University
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Changzhou University
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Abstract

本发明涉及一种液固相催化合成1‑丁烯‑3,4‑二醇的方法,该方法以酸性固体分子筛和金属盐改性碳材料的混合物为催化剂,以2‑丁烯‑1,4‑二醇为原料,在50‑120℃、反应2‑10h,常压条件下即可实现1‑丁烯‑3,4‑二醇的高效合成,2‑丁烯‑1,4‑二醇转化率高于79%,1‑丁烯‑3,4‑二醇选择性高于67%。该方法操作简单,过程绿色,环境友好,催化剂经过滤后即可循环使用。

Description

一种液固相催化合成1-丁烯-3,4-二醇的方法
技术领域
本发明涉及多相催化领域,特别涉及一种非均相催化合成1-丁烯-3,4-二醇的方法。
背景技术
1-丁烯-3,4-二醇是合成锂离子电解液添加剂的乙烯基碳酸乙烯酯、乙烯基亚硫酸乙烯酯的重要原料,也是重要的医药中间体,具有重要的工业经济价值。
1-丁烯-3,4-二醇可以由聚丁二烯过氧化物加氢制备,而聚丁二烯过氧化物是由丁二烯氧化制得,该法的缺点是1-丁烯-3,4-二醇中含有副产物2-丁烯-1,4-二醇。1-丁烯-3,4-二醇也可以由乙烯基环氧化物的水解制得,该过程的缺点同样在于乙烯基环氧化物需由丁二烯氧化制得。1-丁烯-3,4-二醇还可从丁二烯的乙酰氧基化副产物1,4-二乙酰氧基-2-丁烯和3,4-二乙酰氧基-1-丁烯水解制得,其缺点在于3,4-二乙酰氧基-1-丁烯与副产的二乙酰氧基异构物难以分离。
1-丁烯3,4-二醇也可以由2-丁烯-1,4-二醇异构化得到。美国专利US5336815以氧化铼为催化剂异构化。但是,由于氧化铼的价格极其昂贵,因而从成本角度考虑不宜采用;英国专利GB794685A以汞盐为催化剂异构化,由于汞盐的毒性大,对环境的破坏比较大,不宜采用。
相比较而言,美国专利US4661646使用铜盐或亚铜盐作为催化剂,原料易得,价格便宜并且工艺也相对简单,是目前较为合适的工业化合成方法。按照该方法异构化合成1-丁烯-3,4二醇的转化率在50%左右,仍有50%左右的原料没有反应或发生副反应。虽然反应液中和后,铜盐或亚铜盐转化成氢氧化物沉淀析出,但由于氢氧化铜或氢氧化亚铜是微溶于水,在水中仍有一定的溶解度,经大量的实验证明和分析检测,中和后的反应液滤液中仍含有1000~2000ppm的铜离子或亚铜离子。这些铜离子或亚铜离子在后续的脱水、精馏提纯过程中,仍然会催化相关副反应,形成大量的杂质,以致难以精馏提纯得到98%以上的高纯度产品。且易造成2-丁烯-1,4-二醇回收困难,致物料损耗严重,收率降低。国内也有相关2-丁烯-1,4-二醇异构化合成1-丁烯3,4-二醇的报道,但绝大部分都需要使用盐酸、硫酸等强酸做催化剂,这不仅会对设备和管道带来严重的腐蚀,还会给后续的产物分离带来极大难度。
因此开发一种用于2-丁烯-1,4-二醇异构化合成1-丁烯3,4-二醇的绿色过程具有积极意义。
发明内容
本发明要解决的技术问题是针对当前1-丁烯3,4-二醇合成过程中催化剂腐蚀性强、复用性差、后处理繁琐、产物纯度低等问题,提供一种非均制备合成1-丁烯3,4-二醇的方法。该方法催化剂绿色环保、活性高、寿命长,工艺简单。
为解决上述技术问题,本发明采用的技术方案是:
一种液固相催化合成1-丁烯-3,4-二醇的方法,其特征在于该方法以2-丁烯-1,4-二醇为原料,以混合固体为催化剂,在液固体系中进行反应,反应温度为50-120℃,反应时间为2-10h。其中所述的混合固体催化剂用量为原料质量的1%-5%。所述的混合固体催化剂为酸性固体分子筛和金属盐改性碳材料的混合物。
作为对本发明的限定,本发明所述的混合固体催化剂中酸性固体分子筛和金属盐改性碳材料的质量比为1:3-5:1。
所述的金属盐改性碳材料中金属盐在碳材料上的质量比为1:100-1:5。
作为对本发明的再次限定,本发明所述的酸性固体分子筛为ZSM-5分子筛、MCM-22分子筛、HY分子筛、Hβ分子筛或丝光沸石,其中优选HY分子筛;所述的金属盐改性碳材料为金属改性氮化碳、氧化石墨烯、活性炭或碳纳米管,其中优选氮化碳。
其中氮化碳的制备方法如下:
取6g三聚氰胺置于带盖的坩埚中,然后在马弗炉中以3℃min-1的升温速率加热到550℃并保持3h,得到2g左右淡黄色固体即为氮化碳材料。
氧化石墨烯的制备方法如下:
在冰水浴中,将5g鳞片石墨和2.5g硝酸钠与115mL的浓硫酸混合均匀,搅拌中缓慢加入15gKMnO4,保持2℃以下持续反应1h,将其转移至35℃水浴反应30min,逐步加入250mL去离子水,温度升至98℃继续反应1h后,可明显观察到混合物由棕褐色变成亮黄色。进一步连续加水稀释,并用质量分数30%的H2O2溶液处理。将上述溶液抽滤,用5%HCl溶液洗涤至中性,将滤饼放入烘箱中80℃充分干燥即得氧化石墨。取0.1g氧化石墨放入50mL去离子水中,超声处理1.5h(180W,60Hz),随后进行抽滤,将滤饼放入真空烘箱中40℃(10Pa)干燥6h即得所需的氧化石墨烯。
作为对本发明的又一次限定,本发明所述的金属盐改性碳材料中金属盐是VIII、IB或IIB族的金属硝酸盐、硫酸盐或醋酸盐。所述的金属盐改性碳材料中金属盐中的金属为Fe、Co、Ni、Cu或Zn。
所述的金属盐改性碳材料以浸渍法操作,其具体操作步骤为:
首先将金属盐溶解于去离子水中,再将碳材料加入到上述溶液中,然后将碳材料加入到上述金属盐溶液中,再用机械搅拌、机械振荡、机械回转或超声处理方式将溶液搅拌均匀,静置5-20h,最后在100-120℃下烘干即可。
其中超声处理时需在超声功率60-200W下,处理2-4次,每次5-10分钟。
采用上述技术方案后,本发明取得的有益效果是:
(1)本发明使用固体催化剂,替代传统的盐酸或硫酸,可以完全杜绝设备腐蚀问题,而且产物中没有酸性物质出现,后处理大大简化;
(2)本发明将金属盐固载于碳材料表面,有效克服了金属离子的流失问题;
(3)本发明采用非相催化工艺,催化剂与产物直接分离,工艺简单,产物后处理简单且纯度高。
附图说明
图1为:MCM-22+Cat6混合物(质量比4:1)的XRD表征结果
其中(1)为未使用过的MCM-22+Cat6混合物(质量比4:1)的XRD表征结果
(2)为使用4次后MCM-22+Cat6混合物(质量比4:1)的XRD表征结果
由图1可见,催化剂经过4次使用后,与新制备的催化剂相比,结构和晶相上没有显著差异。这说明本发明所制备的催化剂在2-丁烯-1,4-二醇液固相异构化合成1-丁烯3,4-二醇过程中稳定性较好。
具体实施方式
下面结合实施例进一步说明本发明,但不限于此。
实施例1
将硝酸铜完全溶解于去离子水中,然后将氮化碳加入上述溶液中,搅拌均匀,其中硝酸铜与氮化碳的质量比为1:20,将上述混合物在60W条件下超声处理2次,每次5分钟。随后静置10h,然后在100℃条件下烘干,备用,记为Cat1。
实施例2
将醋酸铜完全溶解于去离子水中,然后将氮化碳加入上述溶液中,搅拌均匀,其中醋酸铜与氮化碳的质量比为1:100,将上述混合物在100W条件下超声处理4次,每次10分钟。随后静置20h,然后在100℃条件下烘干,备用,记为Cat2。
实施例3
将硫酸铁完全溶解于去离子水中,然后将氧化石墨烯加入上述溶液中,搅拌均匀,其中硫酸铁与氧化石墨烯的质量比为1:10,将上述混合物在200W条件下超声处理2次,每次6分钟。随后静置10h,然后在120℃条件下烘干,备用,记为Cat3。
实施例4
将硝酸镍完全溶解于去离子水中,然后将活性炭加入上述溶液中,搅拌均匀,其中硝酸镍与活性炭的质量比为1:10,将上述混合物在150W条件下超声处理3次,每次8分钟。随后静置12h,然后在100℃条件下烘干,备用,记为Cat4。
实施例5
将醋酸锌完全溶解于去离子水中,然后将碳纳米管加入上述溶液中,搅拌均匀,其中醋酸锌与碳纳米管的质量比为1:5,将上述混合物在120W条件下超声处理4次,每次10分钟。随后静置12h,然后在110℃条件下烘干,备用,记为Cat5。
实施例6
将硝酸铜完全溶解于去离子水中,然后将活性炭加入上述溶液中,搅拌均匀,其中硝酸铜与活性炭的质量比为1:10,将上述混合物在200W条件下超声处理2次,每次5分钟。随后静置10h,然后在100℃条件下烘干,备用,记为Cat6。
实施例7
将硫酸锌完全溶解于去离子水中,然后将氧化石墨烯加入上述溶液中,搅拌均匀,其中硫酸锌与氧化石墨烯的质量比为1:10,将上述混合物在200W条件下超声处理2次,每次5分钟。随后静置10h,然后在120℃条件下烘干,备用,记为Cat7。
实施例8
将硝酸钴完全溶解于去离子水中,然后将氮化碳加入上述溶液中,搅拌均匀,其中硝酸钴与氮化碳的质量比为1:5,将上述混合物在200W条件下超声处理2次,每次10分钟。随后静置12h,然后在120℃条件下烘干,备用,记为Cat8。
实施例9
将醋酸钴完全溶解于去离子水中,然后将氧化石墨烯加入上述溶液中,搅拌均匀,其中醋酸钴与氧化石墨烯的质量比为1:10,将上述混合物在160W条件下超声处理4次,每次10分钟。随后静置10h,然后在100℃条件下烘干,备用,记为Cat9。
实施例10
将硝酸铜完全溶解于去离子水中,然后将氮化碳加入上述溶液中,搅拌均匀,其中硝酸铜与氮化碳的质量比为1:5,将上述混合物在200W条件下超声处理4次,每次10分钟。随后静置20h,然后在110℃条件下烘干,备用,记为Cat10。
实施例11
将硝酸铜完全溶解于去离子水中,然后将氮化碳加入上述溶液中,用机械搅拌的方式混合均匀,其中硝酸铜与氮化碳的质量比为1:5。随后静置20h,然后在110℃条件下烘干,备用,记为Cat11。
实施例12
将醋酸铜完全溶解于去离子水中,然后将氮化碳加入上述溶液中,用机械回转的方式混合均匀,其中醋酸铜与氮化碳的质量比为1:5。随后静置20h,然后在110℃条件下烘干,备用,记为Cat12。
实施例13
将硫酸锌完全溶解于去离子水中,然后将氮化碳加入上述溶液中,用机械震荡的方式混合均匀,其中硫酸锌与氮化碳的质量比为1:5。随后静置20h,然后在110℃条件下烘干,备用,记为Cat13。
将上述实施例中的得到的催化剂用于2-丁烯-1,4-二醇液固相异构化合成1-丁烯-3,4-二醇过程中,反应方程式如下所示:
Figure BDA0002437868840000071
各催化剂的催化性能如表1所示:
表1催化剂性能评价结果
Figure BDA0002437868840000072
由表1结果可见,本发明所制备的催化剂对2-丁烯-1,4-二醇液固相异构化合成1-丁烯-3,4-二醇有很好的催化性能,不仅实现了较高的原料转化率,而且还获得了很好的产物选择性。
表2催化剂重复使用性能评价结果
m(HY)/m(Cat10)=5:1
Figure BDA0002437868840000081
由表1结果可见,本发明所制备的催化剂对2-丁烯-1,4-二醇液固相异构化合成1-丁烯-3,4-二醇有很好的循环复用性能,评价结束后,仅仅经过简单的过滤即可实现4次循环使用,原料转化率和产物选择性均没有显著改变。
以上述依据本发明的理想实施例为启示,通过上述的说明内容,相关工作人员完全可以在不偏离本项发明技术思想的范围内,进行多样的变更以及修改。本项发明的技术性范围并不局限于说明书上的内容,必须要根据权利要求范围来确定其技术性范围。

Claims (6)

1.一种液固相催化合成1-丁烯-3,4-二醇的方法,其特征在于该方法以2-丁烯-1,4-二醇为原料,以混合固体为催化剂,在液固体系中进行反应,反应温度为50-120℃,反应时间为2-10h,所述的混合固体催化剂为酸性固体分子筛和金属盐改性碳材料的混合物,酸性固体分子筛和金属盐改性碳材料的质量比为1:3-5:1,其中酸性固体分子筛为ZSM-5分子筛、MCM-22分子筛、HY分子筛、Hβ分子筛或丝光沸石;金属盐改性碳材料中的金属盐是Fe、Co、Ni、Cu或Zn的水溶性金属盐。
2.根据权利要求1所述的一种液固相催化合成1-丁烯-3,4-二醇的方法,其特征在于所述的混合固体催化剂用量为原料质量的1%-5%。
3.根据权利要求1所述的一种液固相催化合成1-丁烯-3,4-二醇的方法,其特征在于所述的金属盐改性碳材料中的碳材料为氮化碳、氧化石墨烯、活性炭或碳纳米管。
4.根据权利要求1所述的一种液固相催化合成1-丁烯-3,4-二醇的方法,其特征在于所述的金属盐改性碳材料中金属盐在碳材料上的质量比为1:100-1:5。
5.根据权利要求1所述的一种液固相催化合成1-丁烯-3,4-二醇的方法,其特征在于所述的金属盐改性碳材料以浸渍法操作,其具体操作步骤为:
首先将金属盐溶解于去离子水中,然后将碳材料加入到上述金属盐溶液中,再用机械搅拌、机械振荡、机械回转或超声处理方式将溶液搅拌均匀,静置5-20h,最后在100-120℃下烘干即可。
6.根据权利要求5所述的一种液固相催化合成1-丁烯-3,4-二醇的方法,其特征在于所述的超声处理需在60-200W的功率下,超声2-4次,每次5-10分钟。
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