Akzo Nobel Chemicals International B.v.

Nouryon Chemicals International B.v.

Shanghai Ici Research & Development & Management Co. Ltd.

Akzo Nobel N.v.

Olaf Klobes

Volker Burkhardt

Manfred Menzel

Auke Gerardus Talma

Hendrik Jan Vos

Rudolf Anthonius Maria Venderbosch

Hendrika Petronella Maria Verlaan-Hooft

Christian Probst

Ralf Tatas

Jing He

Antonius Van Pelt

Matthias Folchnandt

Ulises Picardi

Leandro Prats

Rodrigo M Giménez

Heinz Aldenhoven

Daniela Lungu

Günter Sonnenburg

Jan Tobis

Rodrigo M Gimenez

Eike Nicolas Kantzer

Dieter Wolfgang Lange

The disclosure is directed to a sulfidizing agent obtainable by mixing MSand ZSH in a weight ratio of from about 90:10 to about 10:90, wherein M is chosen from Li, Na, K, Rb, Cs, NH, Mgand Ca, y is about 1 or about 2, x is from about 1.1 to about 5, and Z is independently chosen from Li, Na, K, Rb, Csand NH, and a process for using the sulfidizing agent in the recovery of one or more metal ores and/or polymetallic minerals from gangue.

MySx/ZSH mixture as sulfidizing agent

An aliphatic epoxy-terminated polysulfide polymer has the formula R″—CHOH—CH2-S—R—(Sy-R)t-S—CH2-CHOH—R″ and is formed by a process, where each R is independently chosen from branched alkanediyl or branched arenediyl groups and groups with the structure —(CH2)a-O—(CH2)b-O—(CH2)c- and about 0 to about 20% of the number of R-groups are branched alkanediyl or branched arenediyl groups and about 80 to about 100% of the number of R-groups have the structure —(CH2)a-O—(CH2)b-O—(CH2)c-, where t is from about 1 to about 60, y is an average value of from about 1.0 to about 2.5, b is an integer value of from about 1 to about 8, and a and c are independently integers from about 1 to about 10, and where each R″ is independently a particular radical where, m, n, o, p, q and r independently have a value of from about 1 to about 10.

Aliphatic epoxy-terminated polysulfide polymer

Process for the production of a liquid mercapto-terminated polythioethersulfide comprising the step of reacting, at a temperature in the range 0-100&#xb0; C. and in the presence of a catalyst:

Process for the preparation of a polythioethersulfide

Process for the preparation of a polysulfide comprising the step of reacting in the absence of a dihaloalkane a bis(2-dihaloalkyl)formal in the presence of (i) a pre-polymer (I) according to structure (I)X&#x2014;(R2&#x2014;O)&#x2014;CH2&#x2014;O&#x2014;(R1&#x2014;O)&#x2014;CH2&#x2014;(O&#x2014;R2)&#x2014;X&#x2003;&#x2003;(I),wherein R1 and R2 can be the same or different and are selected from alkane chains containing 2-10 carbon atoms, X is a halogen atom, and n, m, and p are integers that can be the same or different and have a value in the range 1-6, with either (i) sodium polysulfide or (ii) a combination of sodium hydrosulfide and sulfur.

Low-salt process for the preparation of a polysulfide

Process for the production of a mercapto-terminated liquid polymer with the formula HS&#x2014;R&#x2014;(Sy &#x2014;R)t &#x2014;SH, wherein each R is independently selected from branched alkanediyl or branched arenediyi groups and groups with the structure &#x2014;(CH2)p&#x2014;O&#x2014;(CH2)q&#x2014;O&#x2014;(CH2)r- and wherein 0-20% of the number of R-groups in the polymer are branched alkanediyl or branched arenediyl groups and 80-100% of the number of R-groups in the polymer have the structure &#x2014;(CH2)p&#x2014;O&#x2014;(CH2)r&#x2014;, wherein t has a value in the range 1-60, y is an average value in the range 1.0-1.5, q is an integer the range 1 to 8, and p and r are integers the range 1-10. The resulting polymer has an improved ability of recovering its original shape after release from deforming compression forces and improved tendency to recover during the application of those forces.

Process for the preparation of a mercapto-terminated liquid polymer comprising the steps of: a) reacting (para)formaldehyde with a halo-alcohol to form a reaction mixture comprising bis(2-dihaloalkyl)formal and b) reacting the reaction mixture of step a) with either (i) sodium polysulfide or (ii) a combination of sodium hydrosulfide and sulfur, wherein the process is performed in the presence of a branching agent selected from the group consisting of di-aldehydes and their corresponding actetals and hemi-acetals.

Process for the preparation of a mercapto-terminated liquid polymer

Pre-polymer according to structure (I) X&#x2014;(R&#x2014;O)&#x2014;CH&#x2014;O&#x2014;(R&#x2014;O)&#x2014;CH&#x2014;(O&#x2014;R)&#x2014;X (I) wherein Rand Rcan be the same or different and are selected from alkane chains containing 2-10 carbon atoms, X is a halogen atom, and n, m, and p are integers that can be the same of different and have a value in the range 1-6. The use of this pre-polymer in the preparation of a liquid polysulfide polymer allows better control over the sulfur and oxygen content and the polarity of the resulting polymer.

Process for the preparation of a polysulfide

The invention related to a process for the preparation of a bismercaptodiether by reacting a polysulfide with a monothiol in the presence of a base and to a process for the depolymerization of a polysulfide by reacting said polysulfide with a monothiol in the presence of a base. These processes enable the preparation of bismercaptodiethers without inorganic salt formation.

Process for deploymerizing polysulfides and the preparation of bis-mercapto-diethers

Process for the preparation of polysulfide of formula (I) HS&#x2014;(CH)&#x2014;O&#x2014;(CH)&#x2014;O&#x2014;(CH)&#x2014;[S&#x2014;S&#x2014;CH)O&#x2014;(CH)&#x2014;O&#x2014;(CH2)]&#x2014;SH (I) wherein m is an integer in the range 1 to 4, n and p are integers in the range 1-10, and q is an integer in the range 1-60, by oxidizing a bismercaptodiether compound of formula (II) HS&#x2014;(CH)&#x2014;O&#x2014;(CH)&#x2014;O&#x2014;(CH)&#x2014;SH (II) with elemental sulfur in the presence of a base and a protic solvent. This process has a high selectivity towards linear disulfides.

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Greiz, Germany

Olaf Klobes