Rhodia Operations

Solvay (china) Co., Ltd.

Rhodia (china) Co. Ltd.

Floryan De Campo

Gary Woodward

Zhaoqing Liu

Bruno Langlois

Allwyn Colaco

Chris Jones

Junli Li

Tingting Zhang

Yang Zhang

Jean-Christophe Castaing

Lawrence Alan Hough

Laurent Guy

Annelyse Murillo

Ruela Talingting Pabalan

Fabien Bellenger

Claude D Mercier

Philippe Jost

Sébastien Righini

Camille Jourde

David James Wilson

Claude Mercier

A method for coating a metallic or inorganic substrate is described, such as metal or glass supports, with an organic layer comprising conjugated diene phosphinate or phosphonate compounds.

Method of coating an inorganic substrate with a stable organic layer

This invention relates to new monomers prepared from phosphorus-containing diene monomers and (meth)acrylonitrile via Ritter reactions, and the preparation method thereof. The polymer of these monomers can be utilized in various applications such as water treatment, rheology modifier, surface modification, etc. The monomers have the following structure (II), Wherein R, R, R, R, R, Rand Rrepresent, independently, hydrogen, alkyl, aryl, alkaryl, aralkyl, cycloalkyl, heterocycloalkyl, or alkenyl groups; Rand Rrepresents RO, and Rrespectively wherein Rand Rrepresents hydrogen, alkyl, aryl, alkaryl, aralkyl, cycloalkyl, alkenyl groups, or metals selected from the group consisting of Na, Li, Ca; Rrepresents H, or CH. 

N-substituted acrylamides, preparation method and use thereof

A process for preparing a 5-halophenol, ortho-substituted by an electron-donating group, is described. Also described, is a process for preparing a sulphonic ester of an ortho-substituted phenol, which is the synthesis intermediate for the ortho-substituted 5-halophenol. The process for preparing a phenol ortho-substituted by an electron-donating group and protected in the form of a sulphonic ester can include reacting a phenol ortho-substituted by an electron-donating group with a sulphonylating agent in the presence of a Lewis acid. The process for preparing a 5-halophenol ortho-substituted by an electron-donating group can include a first step of preparing a phenol ortho-substituted by an electron-donating group and protected in the form of a sulphonic ester, as described above; a second step of halogenating the protected phenol intermediate obtained in the preceding step, in the position para to the electron-donating group; and a third step of deprotecting the sulphonic ester function to hydroxyl.

Process for preparing an ortho-substituted 5-halophenol and a synthesis intermediate thereof

A process for stabilizing hypophosphite salt is provided, which comprises the following steps: a) washing the hypophosphite salt at least one time under a controlled pH value of 4-11, preferably 5-8, as the said hypophosphite salt in an aqueous solution and/or in a solid state; and b) drying the said hypophosphite salt under reduced pressure to remove the volatiles. The process can prevent or minimize the formation of a dangerous quantity of phosphine from hypophosphite salts, more particularly in the flame retardant of the application. The flame retardant polymer composition is also provided, which comprises a polymer and the hypophosphite salt stabilized by the above process.

Process for stabilizing hypophosphite

It is provided a method for preparing conjugated diene phosphonate compounds with high reactivity, which can be used to prepare a variety of phosphonate-bearing conjugated dienes. Some of those dienes will become reactive monomers to make polymers and co-polymers. The said method comprises the step of reacting &#x3b1;, &#x3b2;- or &#x3b2;, &#x3b3;-unsaturated ketones or aldehydes with phosphorus acid or its derivates optionally in a mixture of acetic anhydride and/or acetic acid, to obtain a conjugated diene phosphonate compound having the formula (III) 

Method for preparing conjugated diene phosphonate compounds

The current invention relates to a process for stabilizing a hypophosphite salt, comprising the step of heating the hypophosphite salt at a temperature of between 150 and 370&#xb0; C. during a sufficient period of time to prevent the formation of a dangerous quantity of phosphine in their application as FR in polymers and a flame retardant polymer composition comprising a polymer and 0.1 to 30 weight percent based on the total weight of the composition of the hypophosphite salt thermally stabilized by the above process.

Process for stabilizing hypophosphite salts

This invention relates to conjugated diene phosphinate compounds for making halogen free phosphinate-containing flame retardants, inimer and metal extractants, method for preparing said compounds from unsaturated ketones or aldehydes, and the 5 use thereof. The compounds of the present invention having the following formula (III), wherein R, R, R, R, Rand Rrepresent, independently, hydrogen, alkyl, aryl, alkaryl, aralkyl, cycloalkyl, heterocycloalkyl, or alkenyl groups; Rrepresents hydrogen, alkyl, aryl, alkaryl, aralkyl, cycloalkyl, alkenyl groups, or metals selected from the group consisting of Na, Li, Ca. 

Conjugated diene phosphinate compounds, preparation method and use thereof

Disclosed are methods of determining the effectiveness of an asphaltene deposition inhibitor in oilfield applications. Such methods typically comprising the steps of introducing an oil well fluid into a microfluidic/millifluidic system; introducing a mixture of an asphaltene deposition inhibitor and carrier into the microfluidic/millifluidic system; introducing a precipitating agent, typically comprising heptane, into the microfluidic/millifluidic system; and optionally introducing toluene into the microfluidic/millifluidic system; then observing the presence or absence of asphaltene aggregation within the microfluidic/millifluidic system.

Systems and methods for evaluating asphaltene deposition inhibitors

An aqueous composition for treating hydrocarbon wells contains (a) a scale inhibitor and (b) a viscoelastic surfactant, and further contains from 0 to less than 1% by weight of acid selected from the group consisting of hydrochloric acid, sulfuric acid, phosphoric acid, formic acid, acetic acid, citric acid, maleic acid, hydrofluoric acid, and mixtures thereof.

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Shanghai, China

Floryan De Campo