Next Article in Journal
The Potential of Wetlands in Achieving the Sustainable Development Goals of the 2030 Agenda
Previous Article in Journal
Water Security Assessment of China’s One Belt and One Road Region
Article Menu
Issue 3 (March) cover image

Export Article

Open AccessArticle

Harmless Treatment of Phenylhydrazine Hydrochloride Production Effluent: From Lab Scale to Pilot Scale

School of Chemistry and Chemical Engineering, Qufu Normal University, Qufu 273165, China
*
Author to whom correspondence should be addressed.
Water 2019, 11(3), 608; https://doi.org/10.3390/w11030608
Received: 28 February 2019 / Revised: 21 March 2019 / Accepted: 22 March 2019 / Published: 24 March 2019
(This article belongs to the Section Water and Wastewater Treatment)
  |  
PDF [827 KB, uploaded 24 March 2019]
  |  

Abstract

More economical and effective technology is being developedin the wastewater treatment process to deal with the products of phenylhydrazine hydrochloride (PHH). Fixed ammonium in the effluent is converted to free ammonia by utilizing the neutralization reaction, and the sulfate is removed in the form of gypsum. Meanwhile, the toxic PHH is recycled according to the extraction and re-extraction technology. The raffinate phase is reused through boiling off ammonia vapor. The recovery rates of PHH reach 93.3% in the laboratory and 92.9% at the pilot scale, respectively. Compared with our previous work, the cost of the new technology is ~1/10 of the original, and the profit increases ~3.5-fold. Consequently, it has great potential to be applied to industrial production. View Full-Text
Keywords: phenylhydrazine hydrochloride; neutralization; extraction and re-extraction; evaporating ammonia; xylene phenylhydrazine hydrochloride; neutralization; extraction and re-extraction; evaporating ammonia; xylene
Figures

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
SciFeed

Share & Cite This Article

MDPI and ACS Style

Zhou, D.; Liu, X.; Chen, C. Harmless Treatment of Phenylhydrazine Hydrochloride Production Effluent: From Lab Scale to Pilot Scale. Water 2019, 11, 608.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Water EISSN 2073-4441 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top