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,ºBé)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,ºBé)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,oBé) 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 of 210% were extracted with 1 200 mL water and then 800 mL of water in the following steps. First digestion extract temperature is 100℃, 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 ( Na2 S2 O5 ) 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.
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