CN105713700B - 一种金属加工液基础油及其制备方法 - Google Patents
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- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M135/00—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing sulfur, selenium or tellurium
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Abstract
本发明提供一种金属加工液(或金属加工油)基础油及其制备方法,采用植物油脂肪酸甲酯作为原料,通过在双键上引入巯基噻唑集团,合成植物油脂肪酸甲酯巯基噻唑衍生物,作为金属加工液(或金属加工油)的基础油或抗磨剂,与其它植物油类的基础油相比,植物油脂肪酸甲酯巯基噻唑衍生物的水解安定性好,且本发明的制备步骤简单,反应条件温和。
Description
【技术领域】
本发明涉及一种金属加工液基础油及其制备方法,尤其涉及一种以植物脂肪酸酯为原料的制得的金属加工液基础油,属于金属加工液技术领域。
【背景技术】
在金属加工行业中,金属加工液被广泛应用,起到润滑、冷却、清洗、防锈等作用,以保证工件加工质量和延长刀具寿命。金属加工油(液)通常以矿物油为基础油,并含有抗磨剂、防锈剂、杀菌剂等多种添加剂(大多为石油化工产品)。然而,一方面,这些矿物油和添加剂属于不可再生资源,另一方面,矿物油的物降解能力差,不利于环保。而基于植物油的基础油不但可以再生,而且生物降解能力较好,属于环境友好产品,因此受到广泛重视。目前以植物油为原料,通过磷化、磷氮化、硼化等制备润滑油添加剂方面已有报道,但是由于含磷或硼的化合物水解生成的无机酸会加速酯的水解,使润滑油的水解安定性变坏,且其制备工艺步骤繁琐。
【发明内容】
针对现有技术中存在的问题,本发明的目的在于提供一种以植物油脂肪酸甲酯为原料,制备金属加工液(或金属加工油)基础油的方法,所得基础油的水解安定性好。
为实现上述目的,本发明采用以下技术方案:
一种金属加工液(或金属加工油)基础油的制备方法,具体包括以下步骤:
第一步:植物油脂肪酸甲酯与次卤酸进行加成反应,得到羟基卤代脂肪酸甲酯;
第二步:羟基卤代脂肪酸甲酯在催化剂的作用下,与巯基噻唑类化合物反应生产脂肪酸甲酯巯基噻唑衍生物,获得金属加工液基础油。
所述植物油脂肪酸甲酯可以为各种植物油脂肪酸甲酯,如大豆油脂肪酸甲酯、玉米油脂肪酸甲酯、棉籽油脂肪酸甲酯、棕榈油脂肪酸甲酯、菜籽油脂肪酸甲酯等。
所述次卤酸为次氯酸、次溴酸或次碘酸。
所述第一步中,植物油脂肪酸甲酯与次卤酸的摩尔比为1:1—1:4。
所述巯基噻唑类化合物为2-巯基噻唑、2-巯基苯并噻唑或2,5-二巯基噻二唑。
所述第二步在碱催化剂条件下进行,优选为氢氧化钠、氢氧化钾、碳酸钠或路易斯碱。
所述第二步中,羟基卤代脂肪酸甲酯与巯基噻唑类化合物的摩尔比为1:1—1:4
为阐述本发明的反应原理,以脂肪酸甲酯中含有一个双键,所述巯基噻唑类化合物为2-巯基噻唑为例:
所述第一步的反应方程式为:
所述第二步的反应方程式为:
以脂肪酸甲酯中含有一个双键,所述巯基噻唑类化合物为2,5-二巯基噻唑为例:
所述第一步的反应方程式为:
所述第二步的反应方程式为:
其中,A表示2-巯基噻唑基团(不含巯基上的氢);B表示2,5-二巯基噻二唑基团(不含巯基上的氢);m表示10-20之间是自然数,n表示10-20之间的自然数。
本发明采用植物油脂肪酸甲酯作为原料,通过在双键上引入巯基噻唑集团,合成植物油脂肪酸甲酯巯基噻唑衍生物,作为金属加工液的基础油或抗磨剂,与其它植物油类的基础油相比,植物油脂肪酸甲酯巯基噻唑衍生物的水解安定性好,且本发明的制备步骤简单,反应条件温和。
【具体实施方式】
以下结合实施例来进一步解释本发明,但实施例并不对本发明做任何形式的限定。在未作说明的情况下,本发明涉及的原料均为市售原料,涉及的方法均为本领域内的常规方法。
实施例1
第一步:以大豆油脂肪酸甲酯为原料,在室温条件下不断搅拌、逐步滴加2倍摩尔比的次溴酸(HBrO)溶液,反应3小时。
第二步:称取与第一步中次溴酸相同摩尔量的2-巯基噻唑和质量为脂肪酸甲酯质量的0.5%的氢氧化钠,溶于乙醇溶液中,在不断搅拌下,加入第一步得到的反应液中,反应3小时制得大豆油脂肪酸甲酯巯基噻唑,用乙醇洗涤所得产物,并干燥去除乙醇,即可用作金属加工液基础油。
实施例2
第一步:以棕榈油脂肪酸甲酯为原料,在室温条件下不断搅拌、逐步滴加3倍摩尔比的次氯酸(HClO)溶液,反应2小时。
第二步:称取与第一步中HClO相同摩尔量的2-巯基苯并噻唑和质量为脂肪酸甲酯质量的1.0%的氢氧化钠,溶于乙醇溶液中,在不断搅拌下,加入第一步得到的反应液中,反应2小时制得棕榈油脂肪酸甲酯巯基苯并噻唑,用乙醇洗涤所得产物,并干燥去除乙醇,即可用作金属加工液基础油。
实施例3
第一步:以菜籽油脂肪酸甲酯为原料,在室温条件下不断搅拌、逐步滴加4倍摩尔比的次碘酸(HIO)溶液,反应3小时。
第二步:称取与第一步中HIO相同摩尔量的2-巯基苯并噻唑和质量为脂肪酸甲酯质量的2.0%的氢氧化钠,溶于乙醇溶液中,在不断搅拌下,加入第一步得到的反应液中,反应4小时制得菜籽油脂肪酸甲酯巯基噻唑,用乙醇洗涤所得产物,并干燥去除乙醇,即可用作金属加工液基础油。
实施例4
第一步:以玉米油脂肪酸甲酯为原料,在室温条件下不断搅拌、逐步滴加1倍摩尔比的次碘酸(HIO)溶液,反应3小时。
第二步:称取与第一步中HIO相同摩尔量的2,5-二巯基噻二唑和质量为脂肪酸甲酯质量的1.5%的氢氧化钠,溶于乙醇溶液中,在不断搅拌下,加入第一步得到的反应液中,反应4小时制得玉米油油脂肪酸甲酯巯基噻二唑,用乙醇洗涤所得产物,并干燥去除乙醇,即可用作金属加工液基础油。
表1为利用Rolls-Royee水解安定性试验方法(在所得产物中加入质量百分百为10%的水,在90℃条件下震荡168小时后测定酸值的变化)评价实施例1、实施例2、实施例3、实施例4制得金属加工液基础油的水解安定性结果。
表1:各实施例制得的金属加工油基础油的水解安定性
基础油 | 试验前酸值,mgKOH/g | 试验后酸值,mgKOH/g |
实施例1 | 0.03 | 0.08 |
实施例2 | 0.04 | 0.08 |
实施例3 | 0.03 | 0.07 |
实施例4 | 0.02 | 0.07 |
以上所述,仅为本发明的较佳的具体实施例,但本发明的保护范围并不局限于此,任何熟悉本技术领域的技术人员在本发明揭露的技术范围内,根据本发明的技术方案及其构思加以等同替换或改变,都应涵盖在本发明的保护范围内。
Claims (6)
1.一种金属加工液基础油的制备方法,其特征在于,包括以下步骤:
第一步:植物油脂肪酸甲酯与次卤酸进行加成反应,得到羟基卤代脂肪酸甲酯;
第二步:羟基卤代脂肪酸甲酯在催化剂的作用下,与巯基噻唑类化合物反应生产脂肪酸甲酯巯基噻唑衍生物,获得金属加工液基础油。
2.根据权利要求1所述的金属加工液基础油的制备方法,其特征在于,所述植物油脂肪酸甲酯为大豆油脂肪酸甲酯、玉米油脂肪酸甲酯、棉籽油脂肪酸甲酯、棕榈油脂肪酸甲酯或菜籽油脂肪酸甲酯。
3.根据权利要求1所述的金属加工液基础油的制备方法,其特征在于,所述次卤酸为次氯酸、次溴酸或次碘酸。
4.根据权利要求1所述的金属加工液基础油的制备方法,其特征在于,植物油脂肪酸甲酯与次卤酸的摩尔比为1:1—1:4。
5.根据权利要求1所述的金属加工液基础油的制备方法,其特征在于,所述第二步中的催化剂为碱催化剂。
6.根据权利要求5所述的金属加工液基础油的制备方法,其特征在于,所述第二步中的催化剂为氢氧化钠、氢氧化钾、碳酸钠或路易斯碱。
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