- Synthesis method of dibutyltin dilaurate
-
The invention discloses a synthesis method of dibutyltin dilaurate. The method comprises steps as follows: 1, a solid mixture of lauric acid and dibutyltin oxide is stirred at the temperature of 20-30 DEG C to be converted into a liquid mixture; 2, the liquid mixture is heated to 60-70 DEG C and then subjected to a reflux reaction for 2-3 h; 3, the liquid mixture subjected to the reflux reaction is cooled to 10-30 DEG C, left to stand for layering and then collected, an organic phase is obtained, anhydrous magnesium sulfate is added to the organic phase for water removal, the mixture is filtered, and obtained filtrate is dibutyltin dilaurate. The solid mixture of lauric acid and dibutyltin oxide is converted into the liquid mixture, then the liquid mixture is subjected to the reflux reaction, cooled, separated and dried, and dibutyltin dilaurate is obtained. The process is simple, requirements for equipment are lower, the method takes short time and is convenient, efficient and environment-friendly, and the obtained dibutyltin dilaurate has no solvent or catalyst residues.
- -
-
Paragraph 0020; 0021; 0022; 0023; 0024; 0025; 0026-0040
(2017/10/07)
-
- Production process of dibutyltin dilaurate
-
The invention relates to a production process of dibutyltin dilaurate. Dibutyltin dilaurate is an important raw material of chemical industry. The production process of dibutyltin dilaurate includes: using a vacuum system, adding lauric acid, dibutyltin chloride and a solvent n-heptane into a reaction kettle, pumping a well prepared sodium hydroxide solution into an elevated tank, and performing dropwise adding into the reaction kettle (introducing chilled water into a jacket, and controlling the kettle temperature below 50DEG C), according to an environmental impact statement for a 10000-ton-yearly output organic tin series product project of Lianshui hongding chemical Co., Ltd., at the end of reaction, transferring the product into a centrifugal kettle, separating the water phase, adding the water phase into solid ionic membrane caustic soda for repeated application to generate sodium chloride solid in the water phase, and subjecting the water phase to centrifugation to separate sodium chloride solid, letting the lower oil phase enter a distillation kettle to undergo distillation, distilling the solvent (n-heptane) at 100DEG C for reuse (with the condensing efficiency of n-heptane being 99%), then conducting drying in a drying kettle (at 100-120DEG C), and performing filtering by a filter so as to obtain dibutyltin dilaurate.
- -
-
Paragraph 0001
(2017/07/19)
-
- PROCESS FOR PRODUCTION OF ALKYL TIN ALKOXIDE COMPOUND, AND PROCESS FOR PRODUCTION OF CARBONATE ESTER USING THE COMPOUND
-
The present invention provides a process for producing : a compound represented by XOR2; a dialkyl tin dialkoxide compound having one tin atom, two Sn-R1 bonds and two Sn-OR2 bonds; and/or a tetraalkyl dialkoxy distannoxane compound having one Sn-O-Sn bond, in which each tin atom of the tetraalkyl dialkoxy distannoxane compound has two Sn-R1 bonds and one Sn-OR2 bond, the process comprising reacting in the absence of a catalyst at least one alkyl tin compound selected from the group consisting of i) and ii) below: i) a dialkyl tin compound having one tin atom, two Sn-R1 (wherein R1 represents an alkyl group) bonds, and two Sn-OX bonds (wherein OX is a group in which HOX that is a conjugate acid of OX is a Bronsted acid having a pKa of from 0 to 6.8); and ii) a tetraalkyl distannoxane compound having one Sn-O-Sn bond, in which each tin atom of the tetraalkyl distannoxane compound has two Sn-R1 bonds and one Sn-OX bond (wherein OX is a group in which HOX that is a conjugate acid of OX is a Bronsted acid having a pKa of from 0 to 6.8); and a carbonic acid ester represented by R2OCOOR2 (wherein R2 represents a linear or branched, saturated or unsaturated hydrocarbon group, a hydrocarbon group having a saturated or unsaturated cyclic hydrocarbon substituent, or a Y-CH2- group (wherein Y represents an alkyl polyalkylene group, an aromatic group or a cyclic saturated or unsaturated alkylene ether group)), and/or an alcohol represented by R2OH (wherein R2 is the same as defined above).
- -
-
Page/Page column 66
(2010/09/17)
-
- New latent organotin catalysts: Preparation and mechanism of the thermal decomposition of bis(2-(acyloxy)alkyl)diorganotins
-
New organotin compounds, bis(2-(acyloxy)alkyl)diorganotins, can be thermally decomposed into diorganotin dicarboxylates. The substituent effects on the reaction parameters are studied, and a possible mechanism for the decomposition is proposed. These tetr
- Jousseaume, Bernard,Gouron, Véronique,Maillard, Bernard,Pereyre, Michel,Francès, Jean-Marc
-
p. 1330 - 1331
(2008/10/08)
-