CN103876161B - 一种专用于挤压强化大米的难溶性矿物质的生产方法 - Google Patents
一种专用于挤压强化大米的难溶性矿物质的生产方法 Download PDFInfo
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- A23L—FOODS, FOODSTUFFS, OR NON-ALCOHOLIC BEVERAGES, NOT COVERED BY SUBCLASSES A21D OR A23B-A23J; THEIR PREPARATION OR TREATMENT, e.g. COOKING, MODIFICATION OF NUTRITIVE QUALITIES, PHYSICAL TREATMENT; PRESERVATION OF FOODS OR FOODSTUFFS, IN GENERAL
- A23L29/00—Foods or foodstuffs containing additives; Preparation or treatment thereof
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- A23L33/00—Modifying nutritive qualities of foods; Dietetic products; Preparation or treatment thereof
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- A23L33/16—Inorganic salts, minerals or trace elements
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- A—HUMAN NECESSITIES
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- A—HUMAN NECESSITIES
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- A—HUMAN NECESSITIES
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Abstract
本发明公开了一种专用于挤压强化大米的难溶性矿物质的生产方法,其创新点在于:该方法为对普通的难溶性矿物质进行表面修饰,即在难溶性矿物质乳液中投入一定量的乳化剂和多糖类物质,边搅拌边加热,加热至70~80℃,反应2~3小时,乳液不分层无沉淀;然后对乳液进行喷雾干燥,设置进风温度200~220℃,出风温度110~120℃,对干燥后的粉体进行筛分,得到目标产品。本发明的难溶性矿物质,进行表面修饰,专用于强化大米的挤压生产过程,此类矿物质流动性更好,产率得到提高,吸油值也得到改善,从原先的120上升至160左右,长时间挤压生产未出现堵塞状况。
Description
技术领域
本发明涉及一种难溶性矿物质的生产方法,具体涉及一种专用于挤压强化大米的难溶性矿物质的生产方法。
背景技术
矿物元素也称无机盐,是构成机体组织的重要物质,如钙是构成骨骼和牙齿的主要成分,与血液凝固、神经传导、肌肉伸缩及心律均有关系。婴、幼儿每日约需钙600毫克。又如铁对小儿营养极为重要,它是血红蛋白和肌红蛋白的重要成分,婴、幼儿生长发育快,每日需铁10~20毫克。还有锌,它是人体大多数代谢途径中酶的组成成分,其缺乏时全身各系统会受到不良影响。
大米是世界范围内的主要食物来源之一,特别是在亚洲各国。在我国,虽然随着人们生活水平的不断提高,大米在食物结构中的比重逐渐下降,但日人均能量摄入量的40 %仍是由大米提供的。可是,随着大米加工水平的提高,大米加工精度等级越来越高,由此在碾白和抛光过程中,众多有价值的营养物质也因此损失得越来越严重。所以,在不改变人们食用大米习惯的前提下,生产出具有丰富营养价值的营养强化大米就显得非常重要。
目前,大米营养强化生产工艺主要有粉体强化法、浸吸法、表面涂膜法以及最新的挤压法。其中挤压法以碎米为原料,微粉碎后与营养强化剂预混料混合,通过蒸汽和水的作用,进行调质后进入挤压机重新制粒, 最终干燥后与自然米进行混配,即得到营养强化大米。因为该方法是将营养素与米粉混合后重新制成米粒,所以营养素的分布均一性较好,稳定性也较好, 在淘洗过程中,损失也较小。无论是以上哪种大米营养强化的生产工艺,都必须考虑到与自然米比较,其最终产品的物理化学特性和外观口感等是否相近。
普通难溶性矿物质由于较差的流动性与较低的吸油值,在挤压生产过程中经常出现挤出处堵塞,造成设备不能顺畅运行。因此需要提供一种能够改善此类矿物质元素的流动性和吸油值,利于挤压生产,提高产率的生产难溶性矿物质的方法。
发明内容
本发明要解决的技术问题是提供一种专用于挤压强化大米的难溶性矿物质的生产方法,该方法工艺简单,提高了难溶性矿物质的产率。
为解决上述技术问题,本发明采用的技术方案为:一种专用于挤压强化大米的难溶性矿物质的生产方法,其创新点在于:该方法为对普通的难溶性矿物质进行表面修饰,即在难溶性矿物质乳液中投入一定量的乳化剂和多糖类物质,边搅拌边加热,加热至70~80℃后反应2~3小时,乳液不分层无沉淀;然后对乳液进行喷雾干燥,设置进风温度200~220℃,出风温度110~120℃,对干燥后的粉体进行筛分,得到目标产品。
进一步的,所述乳液中难溶性矿物质、乳化剂和多糖类化合物的质量百分比为90~99%:0.5~5.0%:0.5~5.0%。
进一步的,所述的难溶性矿物质为磷酸氢钙或碳酸钙或磷酸铁或焦磷酸铁或氧化锌或碳酸锌或氧化镁或碳酸镁。
进一步的,所述的乳化剂为硬脂酰乳酸钠或单甘脂或蔗糖脂肪酯中的其中一种。
进一步的,所述的多糖类物质为玉米淀粉或麦芽糊精或纤维素或大米淀粉中的其中一种。
进一步的,所述在难溶性矿物质乳液中投入一定量的乳化剂和多糖类物质,边搅拌边加热时的搅拌速度为200~300r/min。
进一步的,对干燥后的粉体进行40~100目筛分。
进一步的,对干燥后的粉体进行100目筛分。
本发明的有益效果:本发明通过乳化剂和多糖类物质对难溶性矿物质进行表面修饰,改进后的此类矿物质流动性更好,产率提高至96.0%,吸油值也得到改善,从原先的120上升至160左右,在强化大米的挤压生产过程不会出现堵塞状况。
具体实施方式
下面结合具体实施例对本发明的技术方案作详细说明。
实施例1
在1000L磷酸钙乳液(固含量13.0%)中投入0.75kg硬脂酰乳酸钠、0.75kg玉米淀粉,边搅拌边加热,达到温度70℃,反应2小时,乳液不分层无沉淀。对乳液进行喷雾干燥,设置进风温度200℃,出风温度110℃,对粉体进行100目筛分。
本实施例中产品的产率95.8%,吸油值161。
实施例2
在1500L磷酸氢钙乳液(固含量12.1%)中投入4.5kg单甘脂、1.5kg麦芽糊精,边搅拌边加热,达到温度75℃,反应2.5小时,乳液不分层无沉淀。对乳液进行喷雾干燥,设置进风温度210℃,出风温度120℃,对粉体进行100目筛分。
本实施例中产品的产率96.1%,吸油值157。
实施例3
在1200L碳酸钙乳液(固含量8.1%)中投入4.8kg蔗糖脂肪酯、4.8kg纤维素,边搅拌边加热,达到温度78℃,反应2.5小时,乳液不分层无沉淀。对乳液进行喷雾干燥,设置进风温度210℃,出风温度115℃,对粉体进行100目筛分。
本实施例中产品的产率95.2%,吸油值156。
实施例4
在1000L氧化锌乳液(固含量24.5%)中投入9.0kg蔗糖脂肪酯、1.8kg麦芽糊精,边搅拌边加热,达到温度80℃,反应2.5小时,乳液不分层无沉淀。对乳液进行喷雾干燥,设置进风温度210℃,出风温度120℃,对粉体进行60目筛分。
本实施例中产品的产率95.9%,吸油值153。
实施例5
在1200L焦磷酸铁乳液(固含量15.8%)中投入3.0kg硬脂酰乳酸钠、2.0kg玉米淀粉,边搅拌边加热,达到温度70℃,反应2小时,乳液不分层无沉淀。对乳液进行喷雾干燥,设置进风温度200℃,出风温度110℃,对粉体进行100目筛分。
本实施例中产品的产率96.3%,吸油值161。
实施例6
在1500L碳酸镁乳液(固含量35.7%)中投入8.5kg单甘脂、10.0kg麦芽糊精,边搅拌边加热,达到温度75℃,反应2.5小时,乳液不分层无沉淀。对乳液进行喷雾干燥,设置进风温度210℃,出风温度120℃,对粉体进行100目筛分。
本实施例中产品的产率95.0%,吸油值152。
Claims (1)
1.一种专用于挤压强化大米的难溶性矿物质的生产方法,其特征在于:该方法为对普通的难溶性矿物质进行表面修饰,所述的难溶性矿物质为氧化锌或碳酸锌或氧化镁或碳酸镁,即在固体含量5~40%难溶性矿物质乳液中投入一定量的硬脂酰乳酸钠或单甘脂作为乳化剂和玉米淀粉或麦芽糊精或纤维素或大米淀粉中的任意一种作为多糖类物质,边搅拌边加热,搅拌速度为200~300r/min,加热至70~80℃后反应2~3小时,乳液不分层无沉淀,所述乳液中难溶性矿物质、乳化剂和多糖类化合物的质量百分比为90~99%:0.5~5.0%:0.5~5.0%;然后对乳液进行喷雾干燥,设置进风温度200~220℃,出风温度110~120℃,对干燥后的粉体进行40~100目筛分,得到目标产品。
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