Method for preparing ammonium dihydrogen phosphate and preparing special fertilizer for ginger as byproduct

Abstract

The invention relates to the technical field of chemical industry, and especially relates to a method for preparing ammonium dihydrogen phosphate and preparing a special fertilizer for ginger as a byproduct. The temperature and other coefficients of the preparation of ammonium dihydrogen phosphate from phosphoric acid through a wet process are changed, so the purity of the ammonium dihydrogen phosphate product is improved, and the N, P and K compounded fertilizer is produced. The method improves the purity of ammonium dihydrogen phosphate, and the produced special fertilizer for ginger has high absorptivity, can meet the nutrition needs of ginger in all stages of the growth period of ginger, greatly increases the output of ginger, and is an efficient compound fertilizer.

Description

technical field The invention relates to the technical field of chemical industry, in particular to a production method for preparing ammonium dihydrogen phosphate by-product ginger special fertilizer. Background technique Ginger, plant of Zingiberaceae Zingiberaceae, also known as "Zingiber officinale"; rhizome with yellow-green flowers and pungent fragrance. Fresh or dried rhizomes can be used as condiments. Ginger is processed as one of the medicinal materials of traditional Chinese medicine. Ginger has the effect of dispelling cold and sweating, so ginger tea can treat colds. It is also one of the commonly used condiments in daily cooking. Ginger, green onion and garlic are called "three major seasonings". The fertilizer used for planting ginger is generally nitrogen, phosphorus and potassium mixed fertilizer, such as the invention patent of CN10331928A, a kind of special fertilizer for ginger and its preparation method, which includes base fertilizer, mid-term fert...

AI Technical Summary

Problems solved by technology

In the process of producing ammonium dihydrogen phosphate, the purity of ammonium dihydrogen phosphate is not high, and the filtrate also contains a large amount of unprecipitated carbonamide, H 2 PO 4 - 、HPO 4 2- 、PO 4 3- and other substances, the researchers of the present invention have studied the composition content of traditional ginger special fertilizer and the absorption situation of ginger from a large number of prior art documents and many years of exploration and research, and have effectively explored the production of phosphoric acid diphosphate from wet-process phosphoric acid. The special fertilizer for ginger is produced from the filtrate of ammonium hydrogen phosphate, which solves the problems of low purity of ammonium dihydrogen phosphate produced by wet process phosphoric acid and unusable active ingredients in the filtrate. At the same time, the special fertilizer has good absorption rate and controllable release effect. Domestic fertilizer production, no report

Images