June 3, 2024 Longchang Chemical

Guanidine carbonate CAS 593-85-1

Other Name: Aminomethanamidine carbonate; bis(amino(imino)methanaminium) carbonate; Guanidne carbonate; Guanidine Carbonate; Guanidin Carbonate Salt

Item Specifications Results
Purity 99%Min 99.45%
Moisture 0.2Max 0.16%
Ash content 0.4Max 0.34%
Solution( 20% aq) transparent Conforms
PH value (4%) 11.4±0.4 11.43
Conclusion The results conforms with Enterprise standards

 

1. In industrial production, guanidine carbonate can be used as an antioxidant, resin stabiliser, pH adjuster for amino resins, etc., and has a wide range of applications in cosmetics and polymer resin production.
2. As an antioxidant, guanidine carbonate can prolong the service life of polymers, rubbers and greases, and prevent them from oxidation and deterioration under high temperature and ultraviolet radiation.
3. As a resin stabiliser, guanidine carbonate can protect polymer resin from light, heat, oxygen and other environmental factors to extend its service life.

 

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Research on the synthesis method of high purity guanidine carbonate

Guanidine carbonate is a kind of organic fine chemical product with a wide range of applications, mainly used in the synthesis of flame retardants, flocculants, foaming agents, sulfonamides, etc. It is also used as a synergist for synthetic detergents and a raw material for high-grade cosmetics. Guanidine carbonate is also used as a synergist in synthetic detergents and a raw material for high-grade cosmetics. The synthesis of guanidine carbonate has been widely reported in the literature[1-3]. The domestic production of guanidine carbonate mainly adopts the method of melting dicyandiamide and ammonium chloride to form guanidine hydrochloride, then generating free guanidine under the action of alkali, and then guanidine and carbon dioxide react to form guanidine carbonate. This route is easy to produce impurities such as melamine and its dimer and trimer when melting at high temperature, and there are Cl- and Na+ in the system, so it is difficult to get rid of them completely when purifying, and even for the guanidine carbonate with purity >99%, its ash content is still as high as 0.2%, so it is not easy to get high purity guanidine carbonate. In this paper, guanidine carbonate is synthesised from ammoniacal nitrile by reacting with carbon dioxide and ammonia in one step, which is also called ash-free guanidine carbonate, and then purified to obtain high-purity guanidine carbonate, and the reaction equation is as follows.
2NH2CN+CO2+2NH3+H20→[NH2C(:NH)NH2]2H2CO3

Preliminary study of ionic liquids for solvent extraction of uranyl ions

A preliminary study was carried out on the extraction of uranyl ions from nitric acid medium using imidazolium ionic liquids 1-octyl-3-methylimidazolium hexafluorophosphate ([C8mim][PF6]), 1-butyl-3-methylimidazolium hexafluorophosphate ([C4mim][PF6]), and the quaternary amine ionic liquids tri-octylmethylammonium chloride ([N8881][Cl]) as the diluents and TBP as the extractant. The results showed that the extraction partition ratios of uranium increased with the increase of the initial nitric acid concentration in the aqueous phase, and the quaternary amine ionic liquids were slightly better than the imidazole ionic liquids, but all of them were poorer than that of the control diluent, isooctane. The conditions of the reaction were investigated using guanidine carbonate as the reelectant. Guanidine carbonate was able to quantitatively re-extract uranyl ions from these three ionic liquids under the experimental conditions, which solved the problems of re-extraction in the extraction of uranyl ions with ionic liquids and the recycling of ionic liquids.

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