CN1821238A - 改善未加工食油和脂肪质量和回收次要成分的方法 - Google Patents
改善未加工食油和脂肪质量和回收次要成分的方法 Download PDFInfo
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- CN1821238A CN1821238A CNA2006100072700A CN200610007270A CN1821238A CN 1821238 A CN1821238 A CN 1821238A CN A2006100072700 A CNA2006100072700 A CN A2006100072700A CN 200610007270 A CN200610007270 A CN 200610007270A CN 1821238 A CN1821238 A CN 1821238A
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- fat
- edible oil
- tocotrienols
- oil
- fats
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Classifications
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- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11B—PRODUCING, e.g. BY PRESSING RAW MATERIALS OR BY EXTRACTION FROM WASTE MATERIALS, REFINING OR PRESERVING FATS, FATTY SUBSTANCES, e.g. LANOLIN, FATTY OILS OR WAXES; ESSENTIAL OILS; PERFUMES
- C11B7/00—Separation of mixtures of fats or fatty oils into their constituents, e.g. saturated oils from unsaturated oils
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- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11B—PRODUCING, e.g. BY PRESSING RAW MATERIALS OR BY EXTRACTION FROM WASTE MATERIALS, REFINING OR PRESERVING FATS, FATTY SUBSTANCES, e.g. LANOLIN, FATTY OILS OR WAXES; ESSENTIAL OILS; PERFUMES
- C11B3/00—Refining fats or fatty oils
- C11B3/001—Refining fats or fatty oils by a combination of two or more of the means hereafter
-
- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11B—PRODUCING, e.g. BY PRESSING RAW MATERIALS OR BY EXTRACTION FROM WASTE MATERIALS, REFINING OR PRESERVING FATS, FATTY SUBSTANCES, e.g. LANOLIN, FATTY OILS OR WAXES; ESSENTIAL OILS; PERFUMES
- C11B3/00—Refining fats or fatty oils
- C11B3/006—Refining fats or fatty oils by extraction
-
- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11B—PRODUCING, e.g. BY PRESSING RAW MATERIALS OR BY EXTRACTION FROM WASTE MATERIALS, REFINING OR PRESERVING FATS, FATTY SUBSTANCES, e.g. LANOLIN, FATTY OILS OR WAXES; ESSENTIAL OILS; PERFUMES
- C11B3/00—Refining fats or fatty oils
- C11B3/12—Refining fats or fatty oils by distillation
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- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Microbiology (AREA)
- Fats And Perfumes (AREA)
- Edible Oils And Fats (AREA)
Abstract
本发明涉及一种从食油和脂肪中回收次要成分的过程,当中并无破坏食油和脂肪的天然成分,更同时改善植物油和脂肪的质量。
Description
技术领域
本发明涉及一个新过程,用以回收油及脂肪的次要成分,而过程中未有破坏油或是脂肪的天然成分,而同时改善植物油及脂肪的质量。特别是,本发明涉及分隔及去除三酸甘油脂和二酸甘油脂;用液态提炼、包含尿素的化合物形成及分段法由生育三烯酚分隔及去除部分游离脂肪酸、固醇单酸甘油脂及其它成分,再用真空蒸馏以进一步分隔游离脂肪酸及单酸甘油脂以获取生育三烯酚浓缩物。根据现行的贸易规范,经过本发明过程的油及脂肪的质量,比原本的油及脂肪良好。
背景技术
生育三烯酚是维生素E族的成员。在自然状态,已知的维生素E族成员有十二位,统称作母生育酚(tocols)。它们分别为α-、β-、γ-及δ-生育酚、α-、β-、γ-及δ-生育三烯酚、去甲生育三烯酚、二去甲生育三烯酚、以及两个α-生育单烯酚的异构体。生育酚有饱和植基侧链附着于色满环上,而生育三烯酚则有三个双键附着于法呢基侧链上。生育单烯酚的烃侧链内有一个双键。除侧链外,生育酚、生育单烯酚及生育三烯酚的化学结构相类,都有一个色满环。
α-母生育酚是指母生育酚的色满环的位置5、7及8都被甲烷基组代替;β-母生育酚是指母生育酚的色满环的位置5及8都被甲烷基组代替;γ-母生育酚则指母生育酚的色满环的位置7及8都被甲烷基组代替;而δ-母生育酚是指母生育酚的色满环的位置8都被甲烷基组代替。
由于生育三烯酚的资源非常有限,因此在过去十年,生育三烯酚获得的注意比生育酚少。但最近的研究成果显示,生育三烯酚有良好的化学防止功能,是为生育酚所欠缺的。部分的研究资料包括:
●抗血管新生的特性有潜在抑制癌细胞生长及增生的作用(因路古持等,2003生物科学、生物技术及生物化学,67,1623-1627)
●导致人类乳癌细胞凋亡(盖瑟利等,1997,营养期刊127期,554S-558S;尼沙日南等,1998,脂类,33,461-469;余等,1999,营养与癌症,33,26-32;尼沙日南等,2000,国际食品科学及营养学学报51附刊,S95-103;周等,2002,营养科学及维生素学报48,332-337),
●利钠剂(塞图等,2003,脂类研究学报,44,1530-1535),
●减低胆固醇(皮尔斯等,1992,医学化学学报,35,526-541 & 3595-3606;派克等,1993,生物学及化学学报,268,11230-11238;库瑞希等,1995,脂类,30,1171-1177;特利亚特等,1999,临床生物化学,32,309-319;周等,2002,营养科学及维生素学报48,332-337;库瑞希等,2002,动脉粥样硬化,161,199-207),
●抗血小板凝聚(库瑞希等,1991,美国临床营养学学报,53,1021S-1026S)
●颈动脉狭窄退化(库言伽等,1997,亚太临床营养学学报,6,72-75),
●针对谷氨酸盐导致的毒性的神经保护(森等,2000,生物学及化学学报,275,13409-13055;甘拿等,2003,生物学及化学学报,278,43508-43515)。
这些研究资料显示出生育三烯酚可取代一些现有药品的潜质,例如:它莫西芬、阿司匹林及斯达汀,或与这些药品共同使用。生育三烯酚的优越之处在于它包括多种治疗功能的特性,且未有发现副作用,亦未有发现过量用药可能产生的毒性。
与生育酚不同,生育三烯酚的自然来源十分有限。在正常食物中不大可能摄取大量的生育三烯酚。生育三烯酚可在棕榈油、米糠油、大麦、小麦胚芽、黑麦、椰子油、及棕榈坚果油中取得。生育三烯酚现有三种商业来源-棕榈油、米糠油及脂树红豆。
棕榈原油含有600-1000ppm的母生育酚,是生育三烯酚最可靠的商业来源。现时全球的棕榈原油每年产量超过二千万吨,其产量更稳步上升。棕榈油主要包括三酸甘油脂。其它成分包括1-5%的游离脂肪酸,4-7.5%的二酸甘油脂和其他次要成份,如单酸甘油脂、固醇、糖脂、磷脂、鲨烯、类胡萝卜素、其他碳氢化合物及三萜烯醇。根据现有的贸易规范,棕榈原油的质量指标包括三个计算指标:游离脂肪酸的含量,湿气及异物的含量,以及一个最近加入的本地制定的计算指标,称作漂白能力指数(DOBI)。
现估计全球的米糠油产量少于一百万吨,而大部份为工业用。一九九二年的脂树红豆的全年产量约有一万吨。
棕榈油的母生育酚成分较米糠油优胜。米糠油中有接近一半的母生育酚是生育酚,而棕榈油的生育酚则占22%。此外,实际上米糠油没有δ-生育三烯酚。报告中显示δ-生育三烯酚在众多母生育酚有最高的抗血管新生、导致细胞凋亡及预防心血管疾病的效能。棕榈油的母生育酚含有12%的δ-生育三烯酚。虽然脂树红豆的生育三烯酚含有丰富的δ-生育三烯酚,但没有包含α-生育三烯酚。报告中显示α-生育三烯酚有最高的神经保护活性。
生育三烯酚(Tocotrienols)的主要问题是难以被血液及/或淋巴系统吸收,以及其生物利用率。在缺乏食用脂肪刺激胆汁和脂酶的分泌下,生育三烯酚(Tocotrienols)难以被人体吸收。美国专利号6200602描述了一种方法,通过中链脂肪酸的单酸甘油脂(Monoacylglycerol)和二酸甘油酯(Diacylglycerol),加上一种分散剂,以提升结肠吸收带极药物的效能,而美国专利号6596306则描述了另一种方法,通过表面活化剂(labrasolTM和Tween80TM)、精炼棕榈油和大豆油,以提升生育三烯酚(Tocotrienols)的输送系统。
由于生育三烯酚(Tocotrienols)在食油及脂肪中的含量极少,因而须要通过酯交换作用或溶剂提取法分隔或去除三酸甘油脂(Triacylglycerol),藉以增加生育三烯酚(Tocotrienols)的浓度。其它次要成份亦须去除,以进一步增强生育三烯酚(Tocotrienols)的浓度。
一些专利描述了从植物油和脂肪中提炼生育三烯酚(Tocotrienols)的方法,其中大部份专利均涉及对食油和脂肪进行酯交换作用,然后回收生育三烯酚(Tocotrienols),再进行真空蒸馏法和使用吸收剂进行蒸馏后处理。有关专利包括美国专利号5157132、6072092、5190618;欧洲专利号0333472A2;英国专利号GB2218989A、GB2160874A和GB1515238。
使用溶剂提炼法从油籽和油溶剂混合物去除杂质或多余成份的例子多不胜数。有关应用的例子包括美国专利号4359417,描述采用水状甲醇去除油籽残余物的黄霉毒素和/或棉子酚的过程。IL58842描述涉及使用水状甲醇或乙醇提炼烃油溶剂混合物的过程。有关发明并非旨在回收成份。
一些专利描述了通过酒精提炼和短程蒸馏从植物油和脂肪中提炼生育三烯酚(Tocotrienols)的方法,其中包括英国专利号GB2387390和美国专利号6649781。有关专利的主要缺点包括低生育三烯酚(Tocotrienols)浓度,以及提炼过程中使用了大量溶剂。脂肪酸和二酸甘油酯(Diacylglycerol)是酒精提炼的主要成份,并在真空蒸馏过程中去除。
尿素属于弱碱。甲醇中每100毫升尿素在40℃温度的可溶性为35克。尿素可与游离脂肪酸产生化学作用产生盐,但这种化学作用非常缓慢,且在本发明的条件下并不显著。这些特征让甲醇中的尿素溶液用作液态提炼。虽然严格来说棕榈油是半固体而并非纯正液体,但将半固体棕榈油分散成精炼的水滴,即可达致有效的提炼。此外,尿素加入碳氢化合物、脂肪酸、脂肪酸甲酯(fatty acid methyl esters)和单酸甘油脂(Monoacylglycerol)可构成尿素包合物。尿素包合物的形成是浓缩若干脂肪酸的有效技术。精选的尿素包合物是基于一种原则,即若干种类的脂肪酸较其它类别的脂肪酸更适合构成尿素包合物,而含有周期环的支链脂肪酸并不构成尿素包合物。
本发明涉及从食油和脂肪中提炼生育三烯酚(Tocotrienols)浓缩物的过程,特别是从未加工棕榈油和其产品中提炼生育三烯酚(Tocotrienols)浓缩物、游离脂肪酸、单酸甘油脂(Monoacylglycerol)和二酸甘油酯(Diacylglycerol),当中并无破坏食油和脂肪,更改善未加工食油和脂肪的质量。
本发明具有许多优点。去除部分母生育酚(tocols)、固醇(sterols)、游离脂肪酸、单酸甘油脂(Monoacylglycerol)、二酸甘油酯(Diacylglycerol)、磷脂(phospholipids)、糖脂(glycolipids)和香料等其它杂质后的食油,较原来的食油或脂肪易于提炼。因此,食油和脂肪可在不大严谨的情况下进行提炼,并可供食用。虽然部分母生育酚(tocols)已经去除,但仍须避免大量母生育酚(tocols)在不大严谨的提炼情况下被漂白土吸收、在高温下降低质量和在棕榈油炼油厂蒸馏非食用棕榈脂肪酸时降低质量。英国专利号2371545和美国专利号6649781描述了一种过程,在去除带极成份后,使用低漂白土份量和在温和情况下提炼植物油和脂肪。
本发明让母生育酚(tocols)在真空蒸馏前进行浓缩至高浓度(多于30%),使小型真空蒸馏厂已足以应付固定产量,大大节省资金成本,原因是短程蒸馏厂等真空蒸馏厂的成本非常昂贵。基本上,带极成份通过含酒精的尿素溶液提炼,而非母生育酚成份如残余三酸甘油脂(Triacylglycerol)、二酸甘油酯(Diacylglycerol)、大量游离脂肪酸、单酸甘油脂(Monoacylglycerol)和固醇(sterols)则通过尿素包合物形成法、结晶法/沉淀法和过滤法的分离过程去除。游离脂肪酸和单酸甘油脂(Monoacylglycerol),特别是饱和脂肪酸,会形成尿素包合物,而其余多余成份将会结晶/沉淀,并以过滤法分隔。母生育酚(tocols)在酒精溶液中保持非固体化的状态。不过,生育三烯酚(Tocotrienols)(特别是带极较多和酸性较高的δ-生育三烯酚(δ-Tocotrienols))容易与晶化固体融合。
在缺乏尿素的情况下,游离脂肪酸和二酸甘油酯(Diacylglycerol)会干扰结晶过程。这些成份在棕榈油行业用作分离的原材料中不受欢迎。在本发明中,尿素和尿素包合物用作种籽物料,促进结晶/沉淀过程和晶体成长。通过尿素包合物和结晶/沉淀过程,配合过滤过程,可有效去除多余成份,在进行短程蒸馏前获取高浓度母生育酚(tocols)(多于30%)。
由于未有进行酯交换作用的步骤,生育三烯酚(Tocotrienols)浓缩物中的残余脂肪酸甲酯(fatty acid methyl esters)毫不重要。脂肪酸甲酯(fatty acid methyl esters)被人体吸收时可水解为脂肪酸和甲醇,而甲醇新陈代谢涉及以人体的肝性酒精和醛脱氢酶转化为甲醛和甲酸。甲醛和甲酸对人体有害。
本发明让母生育酚(tocols)以非常低的温度蒸馏(135℃),母生育酚(tocols)不会经常在高于150℃的温度下蒸馏。真空蒸馏后无须进一步处理(如蒸馏后分离和/或吸收色谱法)。高浓度生育三烯酚(Tocotrienols)(最少50%)可达致。
本发明亦可提炼成份较原来的食油和脂肪为佳的生育三烯酚(Tocotrienols)浓缩物。在本发明中,生育三烯酚(Tocotrienols)与α-生育三烯酚(α-Tocotrienols)的比例为8∶1,而棕榈油所含的比例则为7∶3。生育三烯酚(Tocotrienols)浓缩物拥有较少的α-生育三烯酚(α-Tocotrienols)含量实为较佳。根据研究员约翰荷建斯(JohnHopkins)的报告(米拿等,內部葯品網上報,2004年11月10日)指出,经过重新分析1993年至2004年的19次荟萃分析,显示高份量α-生育三烯酚(α-Tocotrienols)补充剂会增加年老病人离世的风险,其中大部份病人均已患上心脏病等疾病,而高浓度α-生育三烯酚(α-Tocotrienols)会妨碍生育三烯酚(Tocotrienols)降低胆固醇的能力(庫瑞希等,1996,管餋期刊第126期:389-394)。δ-生育三烯酚(δ-Tocotrienols)占生育三烯酚(Tocotrienols)浓缩物约19%,此比例亦明显高于未加工棕榈油的含量(约12%)。δ-生育三烯酚(δ-Tocotrienols)是抑制血管新生(因路古持等,2003生物科学、生物技术及生物化学,67,1623-1627)和诱导凋亡(周等,2002,营养科学及维生素学报48,332-337)的最有效生育三烯酚(Tocotrienols)。
除生育三烯酚(Tocotrienols)外,生育三烯酚(Tocotrienols)浓缩物的其它主要成份是单酸甘油脂(Monoacylglycerol),其主要以一油清(monoolein)的形式呈现。单酸甘油脂(Monoacylglycerol)是天然的食物乳化剂,在人体消化食用脂肪时自然产生。因此,单酸甘油脂(Monoacylglycerol)可避免食用脂肪不足以刺激胆汁和脂酶分泌而引致吸收不良的问题,原因是单酸甘油脂(Monoacylglycerol)是胆汁和脂酶作用的产品。
发明内容
因此,本发明的主要目的在于提供一种从未加工植物油和脂肪中回收游离脂肪酸、母生育酚(tocols)、单酸甘油脂(Monoacylglycerol)和二酸甘油酯(Diacylglycerol)的过程,当中并无破坏未加工植物油和脂肪的天然成份,并在回收次要成份后,改善原来食油和脂肪的质量。
本发明的上述及其它目的通过提供以下项目达致:
一种从食油和脂肪中回收母生育酚(tocols)的过程,当中并无破坏食油和脂肪的天然成份,并改善食油和脂肪的质量。所述过程包括以下步骤:
(a)在甲醇或乙醇或甲醇乙醇混合物中以尿素溶液对食油和脂肪进行液态提炼;
(b)以0℃至-25℃的温度处理从步骤(a)获取的酒精提炼物;
(c)以过滤法分隔从步骤(b)获取的固体和液体;
(d)以局部去除溶剂的方式浓缩从步骤(c)获取的过滤物;
(e)将碳氢化合物溶剂加入从步骤(d)获取的成份,并以过滤或缓缓倒出的方式分隔从碳氢化合物-甲醇层所获取的固体;
(f)冲走甲醇底层以分隔碳氢化合物层、用清水清洗碳氢化合物层,并冲走清水层以进一步分隔碳氢化合物溶剂层;
(g)以低真空蒸馏法去除从步骤(f)获取的碳氢化合物层的溶剂;
(h)以90℃至100℃的温度和0.1Pa蒸馏从步骤(g)获取的成份,以去除作为馏出物的游离脂肪酸;
(i)以135℃的温度和0.1Pa蒸馏从步骤(h)获取的残余物,以获取作为馏出物的生育三烯酚(Tocotrienols)浓缩物;
(j)以甲醇或乙醇或甲醇乙醇混合物彻底清洗从步骤(c)获取的残余物;
(k)去除从步骤(j)获取的酒精溶液的溶剂;
(l)以碳氢化合物溶剂溶解从步骤(k)获取的成份,用清水清洗溶液,并冲走清水层以分隔碳氢化合物溶剂层;
(m)以低真空蒸馏法去除从步骤(l)获取的碳氢化合物层的溶剂;
(n)以90℃至100℃的温度和0.1Pa蒸馏从步骤(m)获取的成份,以去除作为馏出物的游离脂肪酸;以及
(o)以135℃的温度和0.1Pa蒸馏从步骤(n)获取的残余物,以获取作为馏出物的生育三烯酚(Tocotrienols)浓缩物。
以及
一种从食油和脂肪中回收游离脂肪酸、单酸甘油脂(Monoacylglycerol)和二酸甘油酯(Diacylglycerol)的过程,当中并无破坏食油和脂肪的天然成份,并改善食油和脂肪的质量。所述过程包括以下步骤:
(a)在从权利要求1所述的步骤(j)获取的残余物中加入碳氢化合物溶剂,并过滤所得溶液;
(b)以低真空蒸馏法去除从步骤(a)获取的可溶于碳氢化合物溶剂的成份的溶剂,以获取脂肪酸、单酸甘油脂(Monoacylglycerol)、二酸甘油酯(Diacylglycerol)和固醇(sterols)的混合物;
(c)以85℃至100℃的温度和0.1Pa蒸馏从步骤(b)获取的混合物,以去除作为馏出物的游离脂肪酸;
(d)以135℃的温度和0.1Pa蒸馏从步骤(c)获取的残余物,以获取作为馏出物的单酸甘油脂(Monoacylglycerol)浓缩物;以及
(e)以175℃的温度和0.1Pa蒸馏从步骤(d)获取的残余物,以获取作为馏出物的二酸甘油酯(Diacylglycerol)浓缩物。
本发明会以以下实施例详述。
具体实施方式
本发明的特征及详性状在下文描述,其可以是本发明的步骤或本发明各部份的组合。可理解的是,本发明的个别实施例只作说明用,并不构成对本发明的限制。只要不偏离本发明的范畴,本发明的主要特征可以不同的实施例实施。
未加工食油和脂肪的带极和不带极成份是通过在甲醇或乙醇中以尿素溶液提炼来分隔。食油和脂肪与酒精尿素溶液形成两个级别。不带极成份如胡萝卜素、鲨烯和其它碳氢化合物优选保存于食油中,而带极成份如游离脂肪酸、单酸甘油脂(Monoacylglycerol)、二酸甘油酯(Diacylglycerol)、母生育酚(tocols)、固醇(sterols)、糖脂(glycolipids)、磷脂(phospholipids)和氧化物则优选分隔到带极尿素溶液中。
反向流液态提炼器可方便地从未加工棕榈油提炼带极成份。未加工棕榈油等食油和脂肪从反向流液态提炼器的顶部泵进机器内并分散成小水滴。酒精尿素溶液不断从底部泵进提炼器。未加工棕榈油和尿素溶液的泵进率分别由计量泵控制。通过沿着提炼栏长度设置的平叶盘推进器的搅拌动作进行分散和混合程序。在每个转动叶盘之后均设有沉降区。沉降区与混合区是以一垂直障板分隔,该障板延伸至整个提炼栏。密度较高的未加工棕榈油从提炼器顶部反复分散和沉降,直至到达提炼器的底部。残液从底阀被排放到收集器。密度较低的提炼物不断向上推进,直至到达提炼器的顶部,并灌进收集器。若希望进一步进行提炼以更佳地回收带极成分,可将残液反复输进提炼器中循环再用。
残液中的残余酒精通过真空干燥机去除。未加工棕榈油的残余尿素可用清水清洸,而残余的清水则可通过净化、整理和真空干燥的方式去除,这是棕榈油厂的标准处理方法。从残液中回收的未加工棕榈油在贸易规格上获得较原来未加工棕榈油为佳的质量。现时,合约贸易规格的未加工棕榈油标准质量参数为游离脂肪酸含量(不多于5.0%)、湿度和杂质含量(不多于0.25%)和DOBI(不少于2.3)。未加工棕榈油在进行一次单向液态提炼后,经回收的未加工棕榈油一般具备接近一半的游离脂肪酸含量、已去除几乎所有杂质,并提升DOBI值接近0.5个单位。经回收和原来的未加工棕榈油的湿度含量相同。改善质量后的未加工棕榈油可轻易地在棕榈油提炼厂中提炼。
酒精尿素提炼物须接受低温(0℃至-25℃)处理。高溶解度的成份进行尿素包合物、结晶和沉淀过程。低温可减低酒精溶液中残余三酸甘油脂(Triacylglycerol)的可溶性,从而去除残余三酸甘油脂(Triacylglycerol),并在底部形成固体层。至于其它成份,优选为首先形成尿素包合物。在本情况下,以甲醇中低尿素浓度(1%w/v)作为提炼溶剂,形成极小型的固体,并不显著地去除游离脂肪酸、单酸甘油脂(Monoacylglycerol)和二酸甘油酯(Diacylglycerol),令去除溶剂后的提炼物拥有较低的母生育酚(tocols)浓度(1.5%w/w)。气体液相色谱显示,去除的主要成份为饱和脂肪酸和饱和单酸甘油脂(Monoacylglycerol)。
高尿素浓度(10%w/v)形成更多固体。通过真空蒸馏进行过滤和溶剂去除步骤后,可达致较高的母生育酚(tocols)浓度(30-35%)。食油和脂肪在未经酯化或皂化的情况下在短程蒸馏前获取高母生育酚(tocols)浓度,是本发明的独特之处,过去未曾作出报告。气体液相色谱显示,基本上所有二酸甘油酯(Diacylglycerol)及大部份游离脂肪酸、单酸甘油脂(Monoacylglycerol)和固醇(sterols)通过尿素包合物、结晶或沉淀而去除。
本发明甲醇尿素溶液的功能不但在于成为提炼和尿素包合物的媒介,更重要的是通过结晶和/或沉淀后减低非母生育酚成份的可溶性,并消除由游离脂肪酸和二酸甘油酯(Diacylglycerol)形成的混合物,从而去除二酸甘油酯(Diacylglycerol)和固醇(sterols)等其它非母生育酚成份。
在游离脂肪酸和二酸甘油酯(Diacylglycerol)是有关物质中的主要成份时,需要先行克服游离脂肪酸和二酸甘油酯(Diacylglycerol)的抗结晶效力。诱导结晶的能力需要充足的溶解浓度开始晶核过程,并将浓度维持低于晶核阈值以使晶核过程得以继续。以下显示采用低尿素浓度无助浓缩母生育酚(tocols):
甲醇中所含尿素%w/w | α-T%w/w | α-T3%w/w | β-T3%w/w | γ-T3%w/w | δ-T3%w/w | 母生育酚总量%w/w |
0% | 0.1 | 0.2 | 0.02 | 0.3 | 0.1 | 0.7 |
1% | 0.2 | 0.4 | 0.02 | 0.7 | 0.3 | 1.5 |
2.5% | 0.4 | 0.7 | 0.05 | 1.2 | 0.6 | 2.9 |
5% | 0.5 | 1.1 | 0.08 | 1.7 | 0.9 | 4.2 |
10% | 4.5 | 9.4 | 0.8 | 14.6 | 5.9 | 35.2 |
T代表生育酚(Tocopherol)而T3代表生育三烯酚(Tocotrienols)。
n-己烷在清洗甲醇后加入残余物中。通过真空蒸馏去除溶剂后,游离脂肪酸、单酸甘油脂(Monoacylglycerol)、二酸甘油酯(Diacylglycerol)和固醇(sterols)在n-己烷层回收。尿素获回收为残余物。
母生育酚(tocols)的浓度可通过短程蒸馏提升。用作蒸馏的物料被放进转动分配盘中,转动分配盘以计量泵连接擦拭器。物料由转动盘分配到加热架上,并由擦拭器的滚轮传送到薄膜上。擦拭器预设于每分钟300转。内部压缩温度由安装了温度控制器(预设于60℃)的流动温水泵所控制。蒸馏温度由安装了温度控制器的热油加热器所控制,并设有泵以传送热油到短程蒸发器的夹层架。预设于-90℃的冷凝管用作冷槽。转动叶片泵和油扩散泵形成真空状态(0.1Pa)。
以90℃的温度、0.1Pa和50克/小时的低输入率进行短程蒸馏,可蒸馏游离脂肪酸,而保留母生育酚(tocols)。在这些情况下,蒸馏可在相同或不同的短程蒸发器反复进行,直至去除所有游离脂肪酸为止。若物料中含有二酸甘油酯(Diacylglycerol),母生育酚(tocols)则以低于135℃的温度和0.1Pa下进行蒸馏。于135℃的温度和0.1Pa的情况下,所有二酸甘油酯(Diacylglycerol)留存在残余物中,而馏出物为母生育酚(tocols)浓缩物。若物料中并无二酸甘油酯(Diacylglycerol),在0.1Pa的情况下,蒸馏温度可高于135℃,而以低于150℃的温度较佳。在相同输入率但较高蒸馏温度下,馏出物与残余物的比例有所增加,亦可达致较高产量。蒸馏母生育酚(tocols)后,二酸甘油酯(Diacylglycerol)可在170℃的温度和0.1Pa下进行蒸馏和作为馏出物收集。
较佳实施例的具体实施方式
本发明现以以下实施例进一步详述,除非另有所指,否则所有部分和百分比均为重量。
例子一
液态提炼的过程包括在甲醇溶液中以8.5升/小时的速度泵进10%尿素作为较轻部分,并以4.5公斤/小时的速度泵进以45℃的温度预先加热未加工棕榈油(游离脂肪酸含量3.65%,DOBI值为2.30)作为较重部分。搅拌器预设于每分钟900转。收集而来的残液含有17%(w/w)的尿素溶液。以回转式蒸发去除尿素溶液以回收甲醇、清洗和再次进行回转式蒸发后,可获取9.0公斤的未加工棕榈油,其中游离脂肪酸含量1.93%,DOBI值为2.78,并获取15升酒精尿素提炼物,其中6升的酒精尿素提炼物可以-15℃的温度进行40小时的结晶过程。
有关成份随即由真空吸管过滤,以获取过滤物(F1)和残余物(R1)。F1不断进行回转式蒸发,直至开始形成固体。浓缩过滤物随后输送至烧杯,并加入两份(300毫升)n-己烷,沉淀出尿素(27.8克),而洁净n-己烷和甲醇则以漏斗分隔。n-己烷层以清水清洗、分隔和回转式蒸发至干涸,得出1.25克的油性糊状物,其总母生育酚(tocols)浓度为32.4%。由HPLC厘定α-生育酚(α-tocopherol)、α-生育三烯酚(α-tocotrienols)、β-生育三烯酚(β-tocotrienols)、γ-生育三烯酚(γ-tocotrienols)和δ-生育三烯酚(δ-tocotrienols)的个别母生育酚(tocols)浓度分别为3.2、9.1、0.6、13.3和6.2%(w/w)。α-生育酚(α-tocopherol)、α-生育三烯酚(α-tocotrienols)、β-生育三烯酚(β-tocotrienols)、γ-生育三烯酚(γ-tocotrienols)和δ-生育三烯酚(δ-tocotrienols)在母生育酚(tocols)中的相对成份分别为9.9、28.1、1.9、41.0和19.1%。气体液相色谱显示当中并无二酸甘油酯(Diacylglycerol)和三酸甘油脂(Triacylglycerol)。游离脂肪酸占8.7%、单酸甘油脂(Monoacylglycerol)占6.2%、β-谷甾醇(sitosterol)占7.1%。
R1以每份(150毫升)冷却甲醇清洗两次。过滤物(F2)不断进行回转式蒸发,直至开始形成固体。浓缩过滤物随后输送至烧杯,并加入两份(200毫升)n-己烷,沉淀出尿素(564克),而洁净n-己烷和甲醇则以漏斗分隔。n-己烷层以清水清洗、分隔和回转式蒸发至干涸,得出含有0.78%母生育酚(tocols)的26.2克洁净食油。由HPLC厘定α-生育酚(α-tocopherol)、α-生育三烯酚(α-tocotrienols)、β-生育三烯酚(β-tocotrienols)、γ-生育三烯酚(γ-tocotrienols)和δ-生育三烯酚(δ-tocotrienols)的个别母生育酚(tocols)浓度分别为0.07、0.21、0.01、0.32和0.15%(w/w)。α-生育酚(α-tocopherol)、α-生育三烯酚(α-tocotrienols)、β-生育三烯酚(β-tocotrienols)、γ-生育三烯酚(γ-tocotrienols)和δ-生育三烯酚(δ-tocotrienols)在母生育酚(tocols)中的相对成份分别为9.8、27.4、1.7、41.5和19.6%。气体液相色谱显示其它主要成份为游离脂肪酸、单酸甘油脂(Monoacylglycerol)和二酸甘油酯(Diacylglycerol)。
例子二
含有1.1%母生育酚(tocols)的73.9克输入物料由短程蒸发器以50克/小时的输入率、每分钟300转的滚动器、50℃的内部压缩器、100℃的短程蒸发器温度、0.1Pa的真空度和-90℃的冷槽进行蒸馏(膜片泵预设于30%冲程长度和每分钟10份的脉冲)。母生育酚(tocols)浓度提升至2.2%。气体液相色谱显示游离脂肪酸已被馏出,但馏出物中没有生育三烯酚(tocotrienols)zad
残余物在相同情况下再次进行蒸馏,但短程蒸发器温度设于135℃,而残余的游离脂肪酸、单酸甘油脂(Monoacylglycerol)、母生育酚(tocols)和固醇(sterols)则收集为馏出物。气体液相色谱显示二酸甘油酯(Diacylglycerol)在135℃的温度和0.1Pa下不会被蒸馏。母生育酚(tocols)的浓度为12.0%。当短程蒸发器温度增加至160℃,二酸甘油酯(Diacylglycerol)会与残余的游离脂肪酸、单酸甘油脂(Monoacylglycerol)、母生育酚(tocols)(15.8%)和固醇(sterols)一同蒸馏。残余物含有0.06%的母生育酚(tocols)。
本文件虽然描述了本发明的较佳实施例,但对专业人士而言,本发明亦明显可作多种变更及修正,而不脱离本发明的精神及范畴。本权利要求书是要覆盖所述该等在本发明范畴中的修正。
本说明中援引的所有参考、专利和专利刊物均仅作参考之用。
Claims (10)
1、一种从食油和脂肪中回收母生育酚(tocols)的过程,当中并无破坏食油和脂肪的天然成份,并改善食油和脂肪的质量,所述过程包括以下步骤:
(a)在甲醇或乙醇或甲醇乙醇混合物中以尿素溶液对食油和脂肪进行液态提炼;
(b)以0℃至-25℃的温度处理从步骤(a)获取的酒精提炼物;
(c)以过滤法分隔从步骤(b)获取的固体和液体;
(d)以局部去除溶剂的方式浓缩从步骤(c)获取的过滤物;
(e)将碳氢化合物溶剂加入从步骤(d)获取的成份,并以过滤或缓缓倒出的方式分隔从碳氢化合物-甲醇层所获取的固体;
(f)冲走甲醇底层以分隔碳氢化合物层、用清水清洗碳氢化合物层,并冲走清水层以进一步分隔碳氢化合物溶剂层;
(g)以低真空蒸馏法去除从步骤(f)获取的碳氢化合物层的溶剂;
(h)以90℃至100℃的温度和0.1Pa蒸馏从步骤(g)获取的成份,以去除作为馏出物的游离脂肪酸;
(i)以135℃的温度和0.1Pa蒸馏从步骤(h)获取的残余物,以获取作为馏出物的生育三烯酚(Tocotrienols)浓缩物;
(j)以甲醇或乙醇或甲醇乙醇混合物彻底清洗从步骤(c)获取的残余物;
(k)去除从步骤(j)获取的酒精溶液的溶剂;
(l)以碳氢化合物溶剂溶解从步骤(k)获取的成份,用清水清洗溶液,并冲走清水层以分隔碳氢化合物溶剂层;
(m)以低真空蒸馏法去除从步骤(l)获取的碳氢化合物层的溶剂;
(n)以90℃至100℃的温度和0.1Pa蒸馏从步骤(m)获取的成份,以去除作为馏出物的游离脂肪酸;以及
(o)以135℃的温度和0.1Pa蒸馏从步骤(n)获取的残余物,以获取作为馏出物的生育三烯酚(Tocotrienols)浓缩物。
2、根据权利要求1所述的一种从食油和脂肪中回收母生育酚(tocols)的过程,当中并无破坏食油和脂肪的天然成份,并可改善食油和脂肪的质量,其特征在于:通过甲醇或乙醇或甲醇乙醇混合物进行液态提炼,之后在酒精提炼物中加入尿素。
3、根据权利要求1或2所述的一种从食油和脂肪中回收母生育酚(tocols)的过程,当中并无破坏食油和脂肪的天然成份,并可改善食油和脂肪的质量,其特征在于:食油和脂肪为棕榈油、米糠油、棕榈坚果油、椰油、可可豆油,以及从脂树红豆、小麦胚芽、燕麦、大麦和黑麦中提炼的食油。
4、一种从食油和脂肪中回收游离脂肪酸、单酸甘油脂(Monoacylglycerol)和二酸甘油酯(Diacylglycerol)的过程,当中并无破坏食油和脂肪的天然成份,并改善食油和脂肪的质量,所述过程包括以下步骤:
(a)在从权利要求1所述的步骤(j)获取的残余物中加入碳氢化合物溶剂,并过滤所得溶液;
(b)以低真空蒸馏法去除从步骤(a)获取的可溶于碳氢化合物溶剂的成份的溶剂,以获取脂肪酸、单酸甘油脂(Monoacylglycerol)、二酸甘油酯(Diacylglycerol)和固醇(sterols)的混合物;
(c)以85℃至100℃的温度和0.1Pa蒸馏从步骤(b)获取的混合物,以去除作为馏出物的游离脂肪酸;
(d)以135℃的温度和0.1Pa蒸馏从步骤(c)获取的残余物,以获取作为馏出物的单酸甘油脂(Monoacylglycerol)浓缩物;以及
(e)以175℃的温度和0.1Pa蒸馏从步骤(d)获取的残余物,以获取作为馏出物的二酸甘油酯(Diacylglycerol)浓缩物。
5、根据权利要求1至3中任一权利要求所述的过程,以从食油和脂肪中获取生育三烯酚(Tocotrienols)浓缩物。
6、根据权利要求4所述的过程,以从食油和脂肪中获取单酸甘油脂(Monoacylglycerol)。
7、根据权利要求4所述的过程,以从食油和脂肪中获取二酸甘油酯(Diacylglycerol)。
8、根据权利要求1或2所述的过程,以获取改善质量的未加工食油和脂肪。
9、根据权利要求1至3任一权利要求所述的一种从食油和脂肪中回收母生育酚(tocols)的过程,当中并无破坏食油和脂肪的天然成份,并可改善食油和脂肪的质量,其特征在于:所述过程并不涉及皂化、酯化或酯交换作用的步骤。
10、根据权利要求1至3和9任一权利要求所述的一种从食油和脂肪中回收母生育酚(tocols)的过程,当中并无破坏食油和脂肪的天然成份,并可改善食油和脂肪的质量,其特征在于:所获取的生育三烯酚(Tocotrienols)浓缩物含有天然的单酸甘油脂(Monoacylglycerol)和/或二酸甘油酯(Diacylglycerol),作为天然乳化剂和分散剂。
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CN110272406A (zh) * | 2018-03-16 | 2019-09-24 | 棕榈营养食品私人有限公司 | 维生素e浓缩物的制备方法 |
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CN110272406B (zh) * | 2018-03-16 | 2024-01-02 | 棕榈营养食品私人有限公司 | 维生素e浓缩物的制备方法 |
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