محبوبترین نویسندگان :
نویسندگان مقالات پربازدید :
مجله مهندسی شیمی
جزئیات رویداد
همایش ، رویداد ، ژورنال
اینستاگرام تی پی بین
حوزه های تحت پوشش رویداد

  • degradation of brominated epoxy resin and metal recovery from waste printed circuit boards through batch sub/supercritical water treatments

    نویسندگان :
    کلمات کلیدی :
    جزئیات بیشتر مقاله
    • تاریخ ارائه: 1392/01/01
    • تاریخ انتشار در تی پی بین: 1392/01/01
    • تعداد بازدید: 690
    • تعداد پرسش و پاسخ ها: 0
    • شماره تماس دبیرخانه رویداد: -
     waste printed circuit boards (wpcbs) contain high amount of brominated flame retardants and heavy metals which may bring a series of environmental and health problems. in the present study, an effective and benign process using sub- and supercritical water (sub/scw) to simultaneously degrade brominated epoxy resin and recover metals from wpcbs was developed. experiments were performed in a batch-type reactor with temperatures ranging from 200 to 400 °c, water adding amounts from 10 to 40 ml and holding times from 30 to 240 min. the results showed that brominated epoxy resins (bers) could be quickly and efficiently decomposed under sub/scw condition. the debromination rate was 97.8% by controlling the temperature, water adding amount and holding time at 400 °c, 40 ml and 120 min, respectively. most of the bromine was changed into hbr and around 97.7% was enriched in water. meanwhile, bromine-free oil was obtained of which the main compositions were phenol (58.5%) and 4-(1-methylethyl)-phenol (21.7%). after the sub/scw treatments, the glass fibers and copper foils in the residue can be easily liberated and recovered respectively. the copper recovery rate reached 98.11% in the purities of 96.74% (grain size >2.0 mm) and 92.74% (0.147–2.0 mm). this study provides an efficient and green approach for wpcbs recycling.

سوال خود را در مورد این مقاله مطرح نمایید :

با انتخاب دکمه ثبت پرسش، موافقت خود را با قوانین انتشار محتوا در وبسایت تی پی بین اعلام می کنم
مقالات جدیدترین رویدادها
مقالات جدیدترین ژورنال ها