Prepn process of sea water desalting agent for desalting sea water

Abstract

The present invention relates to preparation process of sea water desalting agent, and belongs to the field of sea water desalting technology. The sea water desalting agent is prepared through soaking process including the following steps: 1. preparing acid zeolite through soaking zeolite in acid solution or ammonium salt solution for ion exchange at 25-80 deg.c, washing, filtering and stoving; 2. preparing silver-carrying acid zeolite through soaking the acid zeolite in silver ion solution for ion exchange at 60-120 deg.c in heliophobic condition, washing, filtering and stoving; and 3. mixing the silver-carrying acid zeolite, silver oxide and barium hydroxide in heliophobic condition to obtain the sea water desalting agent. The process is simple and suitable for industrial production, and has facile material. Adopting unique vacuumizing method can result in silver carrying amount up to 22 %.

Description

technical field [0001] The invention belongs to the technical field of seawater desalination, and in particular relates to a preparation method of a seawater desalination agent for seawater desalination. Background technique [0002] Sea water is bitter and cannot be drunk directly. Seawater salinity is mainly sodium chloride, accounting for about 78%, and the remaining 22% is magnesium chloride, magnesium sulfate, potassium chloride, etc. The salinity of human blood is 0.9%, while the salinity of seawater is as high as 4 times. If you drink seawater directly, the body will have too much salt, and the excess salt will be excreted by the kidneys in the form of urine, which may lead to dehydration and death. Therefore, seawater desalination agents must be carried in lifeboats or skydiving equipment to desalinate seawater to replenish water. [0003] At present, the existing seawater desalination agent is used as a chemical agent for desalinating s...

AI Technical Summary

Problems solved by technology

For the problem that the pH value of the desalination agent obtained by this preparation method increases after seawater desalination, it was proposed in U.S. Patent No. 2,322,689 to neutralize excess hydroxide ions with citric acid to generate soluble sodium citrate, but pharmacological tests suggests that this has the potential to cause alkalosis and physiological dehydration

In U.S. Patent US 2,363,020, uric acid is used to reduce the pH value of the effluent to generate insoluble sodium urate, but it is found that this will increase the difficulty of filtering the effluent and affect the taste of the water

At present, people control the amount of silver oxide and barium hydroxide and add strong acid cation exchange resin to make the pH value of the effluent in the range of 8.9 to 10.5, but the volume of the agent is increased and the use efficiency is reduced.