36 results about "Carboxymethyl guar gum" patented technology

A seed or seedling is coated with underivatized guar, cationic hydroxypropyl guar, polyacrylamide, poly(methacrylic acid), poly(acrylic acid), polyacrylate, polyethylene glycol), polyethyleneoxide, poly(vinyl alcohol), polyglycerol, polytetrahydrofuran, polyamide, hydroxypropyl guar, carboxymethyl guar, carboxymethylhydroxypropyl guar, underivatized starch, cationic starch, corn starch, wheat starch, rice starch, potato starch, tapioca, waxy maize, sorghum, waxy sorghum, sago, dextrin, chitin, chitosan, xanthan gum, carageenan gum, gum karaya, gum arabic, pectin, cellulose, hydroxycellulose, hydroxyalkyl cellulose, hydroxyethyl cellulose, carboxymethylhydroxyethyl cellulose, or hydroxypropyl cellulose, the coated seed or seedling having a shelf-life at room temperature in ambient conditions in an unsealed container to at least two months.

Crosslinking of a crosslinkable viscosifying agent and a crosslinking agent may be delayed in a well treatment fluid by incorporated within the fluid a glutamic-N,N-diacetic acid salt, such as a glutamic-N,N-diacetic acid sodium salt like tetrasodium glutamate diacetate. The crosslinking agent may be a zirconium containing crosslinking agent like zirconium (IV) acetyl acetonate. The viscosifying agent may be guar or a guar derivative such as carboxyalkyl guars and hydroxyalkylated guars like carboxymethyl guar, hydroxypropyl guar, hydroxyethyl guar, hydroxybutyl guar and carboxymethylhydroxypropyl guar.

The invention discloses a preparation method of high-substituted-ratio carboxyl methyl guar printing gum, which belongs to the technical field of modified guar. The preparation method comprises the steps of performing the procedures of atomizing alkalization, atomizing oxidization, etherification, cooling neutralization, drying, crushing screening and packaging on raw guar powders to obtain the high-substituted-ratio carboxyl methyl guar printing gum. According to the preparation method, the uniformity of a grafting group is ensured by virtue of high-efficiency atomizing and spraying; the high substituted ratio of a final product is ensured by virtue of semi-dry etherification, so that the difficulties of poor uniformity and low substituted ratio of the conventional carboxyl methyl vegetable glue are solved; and simultaneously, compared with the conventional wet processing, the preparation method is more environment-friendly and more economical. The product, namely the high-substituted-ratio carboxyl methyl guar printing gum, disclosed by the invention can partly or wholly replace sodium alga acid to be applied to printing of activated dyes and the printing process of other anionic dyes, and is equivalent to the sodium alga acid in the aspect of application effects of water solubility, color fastness, color yield, vividness, handfeeling and the like, thus serving as a good substitute of the sodium alga acid.

The invention discloses a carboxymethyl guar gum cross-linking agent and a preparation method and application thereof. The technical scheme is characterized in that the carboxymethyl guar gum cross-linking agent comprises the following raw materials in percentage by weight: 8-12% of crystalline aluminum chloride, 20%-22% of additives and the balance of water, wherein the additives are at least two of formaldehyde, glyoxal, ethanediol, propanetriol and glacial acetic acid. The invention also discloses the preparation method of the carboxymethyl guar gum cross-linking agent and the application of the carboxymethyl guar gum cross-linking agent in a carboxymethyl guar gum fracturing fluid system. The carboxymethyl guar gum cross-linking agent prepared through the method disclosed by the invention has the advantages of wide applicability, good cross-linking property and low integrated cost; after added with the carboxymethyl guar gum cross-linking agent, the carboxymethyl guar gum fracturing fluid system becomes weakly acidic and has a pH value of 3-4, and has the functions of effectively inhibiting the expansion migration caused by the electronegativity of a clay surface, thus playing a role in stabilizing clay.