公开(公告)号：US09145371B2

公开(公告)日：2015-09-29

申请号：US14301576

申请日：2014-06-11

Applicant: RHODIA OPERATIONS

Inventor： Laurianne Timbart ,  Nemesio Martinez-Castro ,  James Woods ,  Howard Prokop ,  Rastko Vukov

IPC: C07D233/32

CPC classification number: C07D233/32

Abstract: Transesterification processes for producing a compound of formula (I) wherein R1 is H or a methyl group, A and B are each, independently, a linear or branched C2-C5 alkylene group, comprising reacting: an acrylate or methacrylate of formula (II) wherein R1 is H or a methyl group and R2 is a C1-C4 alkyl group, with a compound of formula (III) wherein the reaction is performed: (i) in the presence of calcium oxide and calcium hydroxide, and (ii) wherein the molar ratio of the compounds of formula (II) to formula (III) is less than 4:1 or 3:1 respectively.

Abstract translation: 制备其中R 1为H或甲基的式（I）化合物的酯交换方法，A和B各自独立地为直链或支链C 2 -C 5亚烷基，包括使式（II）的丙烯酸酯或甲基丙烯酸酯反应： 其中R1是H或甲基，R2是C1-C4烷基，其中进行反应的式（III）化合物：（i）在氧化钙和氢氧化钙的存在下，和（ii）其中 式（II）化合物与式（III）的摩尔比分别小于4:1或3:1。

公开(公告)号：US10239960B2

公开(公告)日：2019-03-26

申请号：US15179103

申请日：2016-06-10

Applicant: RHODIA OPERATIONS

Inventor： Laurianne Timbart ,  Gilda Lizarraga ,  Gary Woodward ,  Subramanian Kesavan ,  David James Wilson

IPC: C08B37/00 ,  C09K8/035 ,  C09K8/40 ,  C09K8/52 ,  C09K8/62 ,  C09K8/74 ,  E21B43/26 ,  C09K8/68 ,  C09K8/90 ,  C08L5/00 ,  C09K8/60

Abstract: Products and processes that are related to phosphonated polysaccharide compositions, including phosphonated polysaccharide gels, having a substituent degree of substitution with a lower limit of 0.02 and an upper limit of 3, and having a weight average molecular weight with an upper limit of 5,000,000 g/mole, as well as to oil field application or fracturing fluid compositions comprising such phosphonated polysaccharide compositions.