马占相思栲胶浓胶波美度与浓度换算关系及浸提、磺化工艺研究  

Extraction and Sulfonation Technology of Acacia mangium Tannin Extracts,and the Correlation Between Baume Degree of Tannin Extracts and Concentration

作　　者：黄仁整 邹猛 梁发星 

机构地区：[1]广西武鸣栲胶厂,广西南宁530001

出　　处：《生物质化学工程》2014年第3期48-52,共5页Biomass Chemical Engineering

摘　　要：研究了马占相思栲胶主要生产工序的工艺参数。结果得出:马占相思栲胶浓胶在20℃时的波美度(y,°Bé)与浓度(x,kg/L)的关系式为:y=1.2+40x。不同温度(T,℃)下,实测波美度(y')换算为20℃时的波美度(y,°Bé)与温度的关系式为:y=y'+(T-20)/15;浸提工艺:马占相思树皮400 g,吸水率210%,头步加水1200 mL,以后每步加水800 mL,浸提首罐温度100℃,尾罐温度128℃,浸提时间12 h,添加焦亚硫酸钠量助浸为气干原料质量的1.8%,栲胶得率为81.9%,单宁得率为90.6%。磺化工艺:在85℃下,添加焦亚硫酸钠(Na2S2O5)量为栲胶绝干质量的6%,反应时间为2 h,磺化后得栲胶产品的单宁含量为67.8%,不溶物为3.2%,pH值为4.5,总色度为9.6。其他工艺同杨梅栲胶生产工艺。Acacia mangium tannin extract is a new tannin variety developed in recent years.The process parameters of A.mangium tannin extract are studied in this paper.The results show thas the relation of the baume degree（ y,° Bé） and concentration（ kg /L） at 20 ℃ is： y = 1.2 ＋ 40x.And the relation of the baume degree（ y） and concentration at different temperature（ y’） is： y = y’ ＋（ T- 20） /15.Extraction process was that 400 g of A.mangium barks with water absorption rate of210% were extracted with 1 200 mL water and then 800 mL of water in the following steps.First digestion extract temperature is100 ℃,and last digestion extract temperature is 128 ℃.The extract time is 12 h,sodium pyrosulfite which is 1.8% of gas dried materials weight is added.The yield of tannin extract is 81.9%,and the sield of tannins is 90.6%.Sulfonation process is that sodium pyrosulfite（ Na2S2O5） which is 6% of extract solution oven dried weight is added,and the reaction is carried on at 85 ℃for 2 h.The tannin content of sulphonated tannin extract is 67.8%,insoluble content is 3.2%,pH value is 4.5,and Lovibond color is 9.6.Other processes are the same as Waxberry tannin extracts production.

关 键 词：马占相思 栲胶 工艺 

分 类 号：TQ943.2[化学工程]