silica in defoamer
232219968
Preparation of Silicone Emulsion Defoamer with Easy Separation of Magnetic Hydrophobic Nanoparticles
Abstract To prepare lyophobic magnetic nanoparticles (LMNs) with core/shell structure to be applied in silicone emulsion defoamer, magnetic nanoparticles covered with silica (MNS) were prepared in a one step process from FeCl3 6H2O, FeCl2 4H2O and tetraethyl orthosilicate and then modified with poly (methylhydrosiloxane) X ray powder diffraction (XRD) scanning electron microscope (SEM) Fourier transform infrared spectroscope (FTIR) thermogravimetric analysis (TGA) and contact angle tests were performed to characterize the nano particles, and the droplets of the defoamer emulsion were observed with a microscope. The foam breaking and foam inhibition properties of the defoamer and the magnetic separation of the particles were observed and recorded by a camera. It was found that the silicone emulsion defoamer exhibited good foam breaking and foam inhibition properties for foaming systems with anionic, cationic and non ionic surfactants, respectively. The solid particles in the defoamer could be easily separated from the defoamed systems by a magnet.
Shengdi Zhang Honglin Chen
55251547
BODESEL BASED EMULSION DEFOAMER AND METHOD FOR MAKING THE SAME TECHNICAL FIELD
(57) ABSTRACT (73) Assignee: ECOLAB USA INC. St. Paul, MN Disclosed are an oil in water emulsion defoamer and a (US) method for preparing the defoamer. The defoamer may have a dispersed oil phase with a droplet size of 4 to 8 um, and a (21) Appl. No. 14/786,501 viscosity of 100 to 1000 cp and is widely used for defoaming 1 1. in paper coating and wet end in a paper mill. A method for (22) PCT Filed: Apr. 23, 2014 preparing an oil in water emulsion defoamer is also pro vided. The method may include adding an emulsifying agent (86) PCT No. PCT/US2O14/O35091 to biodiesel, and mixing, then gradually adding hydrophobic S371 (c)(1) fumed silica, to obtain a first mixture. The method may also (2) Date: Oct. 22, 2015 include gradually adding water and a non ionic Surfactant, and stirring until uniform to obtain a second mixture. The (30) Foreign Application Priority Data method may also include gradually adding the first mixture to
97747539
Hydrophilic precipitated silica for defoamer formulations
The present invention relates to the use thereof in the best silane for application as anti foaming agents having the all group density, the high pH precipitated silica, a method for their preparation, and in particular anti foaming agent formulations. Precipitated silica, pH, the silanol group density, anti foaming agents, anti foaming formulations, BET, may Sears, tapping density, ignition loss, loss on drying
mario roebbuseu anya rukaseu kareul maieo rolranteu bereugeuman rene alrereudisse helga obeulraden panceu keurisyutian
102887601
Hydrophobic precipitated silica for defoamer
The present invention relates to precipitated silicas with a high pH value and for applications as defoamers optimized silanol group density, a process for their preparation and their use, especially in Entschaumungsformulierungen.
Christian Panz Rene Allerdisse Helga Obladen Mario Dr Loebbus Anja Lukas Roland Bergmann Karl Meier
102928113
Precipitated silica for defoamer
Christian Panz Rene Allerdisse Helga Obladen Mario Dr Loebbus Anja Lukas Roland Bergmann Karl Meier
117135350
Grace buys dental silica businesses
W.R. Grace has signed a definitive agreement to acquire dental silica businesses from Evonik Industries. The European Commission required Evonik to sell the businesses as a condition for approving the firm's just completed $630 million purchase of J.M. Huber Corp.'s specialty silica operations. Set to close on Sept. 5, Grace's deal brings a license to produce and sell Evonik's Sident dental precipitated silica and Huber's defoamer and anticaking agents. Grace says the transaction will strengthen its sales to toothpaste makers.
Marc S Reisch
217361753
A kind of paper grade (stock) defoamer and preparation method thereof
The present invention discloses a kind of paper grade (stock) defoamer and preparation method thereof, and by weight percentage, paper grade (stock) defoamer includes:Modified dimethyl siloxane 10 45%;Modified polyoxyethylene ether 10 25%;Silica 15 30%;Emulsifying agent 2 10%;Nonionic surfactant 1 3%;Thickener 2 12%.30 50 minutes prepared paper grade (stock) defoamers are stirred after above mentioned substance is added.The present invention prepare foam killing agent in paper making with special silicon polyethers as material of main part, equipped with the special defoamer of a kind of new paper pulp that efficient, good dispersion auxiliary agent is composited.Distinguishing feature is the resistance to highly basic of high temperature resistant, and rapid froth breaking, lasting suds froth breaking under high temperature basic conditions.
104556224
An efficient and environmentally friendly method for preparing defoamer
The present invention relates to an efficient and environmentally friendly method for preparing a defoaming agent, comprising the following components: 20% to 30% polydimethylsiloxane, 5% to 20% hydroxy terminated polydimethylsiloxane oxyalkyl, 5% to 8% of a polyether modified polydimethylsiloxane, 3% to 8% silica, 10% to 20% iso tridecyl alcohol emulsifying agent, 0.5% to 1% carboxymethylcellulose sodium, 0.5% to 1% sodium benzoate, 30% to 45% deionized water, the above percentages are percent by mass. The present invention has a low cost, high stability, anti foaming speed, long lasting suds suppressors, no environmental pollution advantages.
139594316
Organosilicone defoamer and preparation method thereof
The invention discloses an organosilicone defoamer and a preparation method of the organosilicone deformer. The defoamer is prepared from the following raw materials in percentage by weight: 10 40% of simethicone (201) 10 25% of high boiling silicone oil, 1 5% of a thickener, 40 60% of water, 5 25% of an emulgator, and 1 5% of fumed silica, wherein all of the raw materials account for 100% The preparation process comprises the following steps: (a) weighing the simethicone (201) and the fumed silica in different weight ratios and adding into a reaction kettle, raising the temperature to about 150 DEG C, and stirring for 5 8 hours to prepare a silicon cream; (b) adding the high boiling silicone oil and the emulgator into the prepared silicon cream, heating to about 40 DEG C, stirring for 30 minutes, then adding the thickener and the deionized water, continuing to stir for 2 4 hours, cooling, discharging, and packaging. The organosilicone defoamer provided by the invention provides a reasonable way to treat byproduct high boiling residues of the organosilicone, improves the stability and the dispersity of the emulsion, guarantees the storage time, and greatly improves the defoaming capability, and the using temperature range of the materials is relatively wide.
139482375
Having excellent stability and defoaming properties of silicone defoamer
The present invention discloses a high in stability, good defoaming ability novel method for preparing a silicone defoamer. Which is made from 10% to 20% silicon paste 3% to 5% of emulsifier, 0.6% to 1% of a thickener, 2% to 5% of diethylene glycol methyl ether and water emulsion. The paste is a methyl silicone oil and silicone hydrophobic fumed silica mixed together, and the emulsifier is a fatty alcohol peregal complex was added with diethylene glycol methyl ether particles can more uniformly within the emulsion more delicate, latex particle size distribution is more reasonable, is not susceptible to delamination, it enhanced the stability of the emulsion and ensure its long time storage without deterioration, while the silicon paste synergistically together to improve the defoaming performance. In the present invention, the produced oil and gas fields defoaming waste water treatment process, especially a foam drainage gas wells can exhibit excellent suds suppressing properties defoaming and antifoaming emulsion stability is better than the general length of up to one year when stored.