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在8天的工厂试验中,向连二亚硫酸钠(Y)中加入四羟甲基硫酸磷(THPS)(吨浆用量1.0kg)对云杉SGW浆进行漂白,结果浆的平均ISO白度多提高了2.0～2.3百分点,且这个过程未对漂白车间和纸机产生任何损害。这一额外白度的增加,在接下来1年使用“THPS+Y”漂白工艺的商业实际生产中继续得到验证,这也使得工厂在较难控制的夏季生产浆料时,白度也能达到要求,而且还减少了生产LWC纸时昂贵的增白剂用量。这一工艺使得工-厂总预算成本每年节约了25万美元。
In an 8-day factory trial, spruce SGW pulp was bleached with sodium tetramethylphosphorothionate (THPS) (1.0 kg per ton of pulp) to the sodium dithionite (Y) resulting in an increase in the average ISO whiteness of the pulp 2.0 to 2.3 percentage points, and this process did not produce any damage to the bleach plant and the paper machine. This additional increase in whiteness continues to be demonstrated in commercial real production using the bleaching process “THPS + Y” for the next year, which also allows the factory to produce pulp in less controlled summer Meet the requirements, and also reduce the amount of expensive whitener used in the production of LWC paper. This process allows workers - factory total budget cost savings of 250,000 US dollars each year.