Chopped stems of Prosopis juliflora, an invasive xerophyte, were digested in a laboratory digester following alkaline sulfite pulping process to generate spent liquor whereby lignin underwent sulfonation to produce sodium lignosulfonate (SLS). SLS was concentrated from the spent liquor by ultrafiltration. Raw wood was featured by high lignin (23.5%), low extractives (1.0%), low wax (0.41), and low ash (2.25%) content thus making it an ideal feedstock to produce lignosulfonates with appreciable physico-chemical property and relatively high mechanical strength. Attempts were made to provide basic information on SLS structure and structural changes that might occur during pulping of P. juliflora under the present experimental conditions. Spectral and X-ray diffraction studies on as-produced SLS revealed substantial depolymerization and structural modification of lignin during sulfite pulping. The derived SLS had higher crystallinity index than the feedstock wood. Effect of average size of raw wood chip and dose of sodium sulfite in the overall yield of pulp and SLS along with the kappa number of the pulp were also analyzed. Findings from this study would serve to cultivate a better understanding of the potential of P. juliflora as a feedstock, so far unexplored, to produce SLS − a value-added product with numerous commercial applications. The use of this particular plant species in paper and pulp industry could also be considered as an effective means of integrated agro management in rural areas.

在碱性亚硫酸盐制浆过程之后，在实验室蒸煮器中消化入侵的旱生植物Prosopis juliflora切碎的茎，产生废液，然后木质素进行磺化反应生成木质素磺酸钠（SLS）。通过超滤从废液中浓缩SLS。原始木材的特点是木质素含量高（23.5％），提取物含量低（1.0％），蜡含量低（0.41）和灰分含量低（2.25％），因此使其成为生产具有可观理化性质且相对而言木质素磺酸盐的理想原料机械强度高。有人企图提供SLS结构和结构变化的制浆过程中可能发生的基本信息P. juliflora在目前的实验条件下。对生成的SLS的光谱和X射线衍射研究表明，亚硫酸盐制浆过程中木质素发生了明显的解聚和结构改性。衍生的SLS具有比原料木更高的结晶度指数。还分析了原木片的平均尺寸和亚硫酸钠用量对纸浆和SLS的总产量以及纸浆的卡伯值的影响。这项研究的发现将有助于加深对胡杨假单胞菌作为原料的潜力的了解，迄今为止尚未开发出这种物质，可以生产具有大量商业应用价值的增值产品SLS。在造纸和纸浆工业中使用这种特殊的植物物种，也可以被视为农村地区综合农业管理的有效手段。