Chemical modification of straw powder and method for preparing cat litter

Abstract

The invention relates to the field of processing and utilization of agricultural and sideline products and the technical field of preparation of pet feeding supplies. It involves a chemical modification of straw powder followed by The method for preparing cat litter: first crush and sieve the air-dried straw, take the part with a particle size between 75-200 microns as fine straw powder, and take the part with a particle size between 0.2-1 mm as coarse straw powder ;Wet the fine straw powder with aqueous sodium hydroxide solution, and treat it at a constant temperature of 75-95°C for 50-90 minutes, so that the material changes from a loose slag state to an adherent state; add chloroacetic acid and epichlorohydrin, React for 1-3 hours, then mix with coarse straw powder, extrude into shape, and finally use microwave drying and screening to obtain cat litter with high water absorption rate; the mass ratio of ingredients is: based on 100 parts of fine straw powder, 50 parts of water -90 parts, 4-8 parts of sodium hydroxide, 5-9 parts of chloroacetic acid, 0.3-1.0 parts of epichlorohydrin, 60-150 parts of coarse straw powder.

Description

technical field [0001] The invention relates to the technical field of processing, modification and utilization of agricultural by-products and the technical field of preparation of consumables required for raising pets. Background technique [0002] Cat litter is a litter used to bury pet feces and urine. It should have good water absorption performance and is a must-have item for families with pets. At present, according to the chemical properties and raw materials, it is divided into organic cat litter and inorganic cat litter. Inorganic cat litter takes inorganic minerals such as clay as the main raw material, such as the methods proposed in patent applications 200410044417.4, 200510040074.9, 201210181553.2, 201210254065.X and 201310243685.8, which cannot be recycled after use and cause environmental pollution. Organic cat litter uses plant by-products such as paper scraps, straw, bean dregs, and wood chips as the main raw materials; the application document of applicat...

AI Technical Summary

Problems solved by technology

Inorganic cat litter uses inorganic minerals such as clay as the main raw material, such as the methods proposed in patent applications 200410044417.4, 200510040074.9, 201210181553.2, 201210254065.X and 201310243685.8, etc., which cannot be recycled after use and cause pollution to the environment

Organic cat litter uses plant by-products such as paper scraps, straw, bean dregs, and wood chips as the main raw materials; the application document of application number 201110227976.9 proposes a natural plant cat litter, which is made of sawdust powder, bamboo powder, straw powder, cotton stalk powder, and corncobs. , wheat drum, bean curd residue, rice flour, paper scraps, leaves, straw, peanut shells, or a combination of several of them as the base material, guar gum, xanthan gum, carboxymethyl cellulose, carboxymethyl starch, etc. Water-soluble polymers are used as agglomeration binders; application documents with application numbers 201210212682.3 and 201210212685.7 propose to compound cat litter with bean dregs, plant adhesives, and surfactants; application documents with application number 201310232981.8 disclose a straw The preparation method of high-quality cat litter for pets is that the straw is fully crushed and ground, passed through a 100-mesh sieve, dried at 120°C-180°C for 3-5 hours to obtain straw powder, and mixed with a binder and a color developer. Cat litter; cat litter prepared by these methods has a very low water absorption rate, and generally only absorbs 2-4 grams of water per gram of product