Method for making polycarboxylic salt as detergent aids

Abstract

Preparation method of polycarboxylate as detergent builder and polycarboxylate. The phosphorus-free washing powder currently promoted uses 4A zeolite, which is a white insoluble powder, and its deposition in water will also cause environmental degradation. In the method of the invention, the cornmeal is mixed with water, added with a catalyst before forming a colloid, keeping the aerobic state, reacting at 60-150 for 30-420 minutes, detecting complexing ability, and performing dehydration treatment. The polycarboxylate is a carboxyl-containing polysaccharide formed by hydrolysis and oxidation of cornstarch under the action of a catalyst, wherein -CH on the starch ring 2 OH is oxidized to -COOH. The catalyst is a mixture of one or several of zinc oxide, aluminum oxide, calcium oxide, magnesium oxide metal oxides and non-metallic oxides of silicon dioxide in any proportion, and the weight and number ratio of the added amount is about 100%. :catalyst=100:0.01-1. This product is used as a substitute for phosphorus-containing additives in detergents. The effect is higher than that of phosphorus-containing additives, and the price is lower than that of phosphorus-containing additives.

Description

technical field [0001] The present invention relates to a polycarboxylate as a washing aid and a method for preparing the polycarboxylate. Background technique [0002] my country has a large population and is a big consumer of washing powder. Most of the current laundry detergents use sodium tripolyphosphate as a detergent aid. After the discharge, the algae in the water will multiply excessively, and a large area of ​​red tide will occur, seriously polluting the environment. The 4A zeolite used in the currently promoted non-phosphorus laundry detergent is a white insoluble powder, and its deposition in water will also cause environmental degradation. And washing article is difficult for rinsing, and the water consumption of rinsing is very large. According to the Delphi cumulative integral prediction technology used by the British environmental protection authority, the impact of phosphate on the environment is 107 points, while that of 4A zeolite is 110. It can be seen ...

AI Technical Summary

Problems solved by technology

Most of the current laundry detergents use sodium tripolyphosphate as a washing aid. After discharge, the algae in the water will multiply excessively, and a large area of ​​red tide will occur, which seriously pollutes the environment.

The 4A zeolite used in the current promotion of phosphorus-free washing powder is a white insoluble powder, and its deposition in water will also cause environmental degradation

Moreover, the washing items are not easy to rinse, and the water consumption for rinsing is very large

According to the Delphi cumulative integral prediction technology used by the British environmental protection authority, the impact of phosphate on the environment is 107 points, while that of 4A zeolite is 110. It can be seen that the pollution of 4A zeolite is more serious than that of sodium tripolyphosphate, and it is not an ideal. substitution