公开(公告)号：US09604895B2

公开(公告)日：2017-03-28

申请号：US14912372

申请日：2014-09-05

Applicant: PLAXICA LIMITED

Inventor： Stephen Donegan ,  Philip James Goodier ,  Edward Leslie Marshall ,  Urvish Rameshchandra Pandya ,  Ajitkumar Mukundrai Patel

IPC: C07C59/08 ,  C07C51/02 ,  C01B7/03 ,  C07C67/08 ,  C07C51/295 ,  C07C51/41 ,  C01D1/04 ,  C01D3/04 ,  A61K35/744 ,  A01N63/02

CPC classification number: C07C51/02 ,  A01N63/02 ,  A61K35/744 ,  C01B7/03 ,  C01D1/04 ,  C01D3/04 ,  C07C51/295 ,  C07C51/41 ,  C07C59/08 ,  C07C67/08 ,  C07C69/68

Abstract: A process for producing lactic acid is provided. The process comprises (a) reacting a stream rich in saccharide with sodium hydroxide in the presence of water to produce a reaction mixture comprising sodium lactate; (b) reacting at least a portion of the sodium lactate with HCl to produce lactic acid and sodium chloride; (c) converting at least a portion of the sodium chloride to chlorine and sodium hydroxide; and (d) recycling at least a portion of the sodium hydroxide produced in step (c) to step (a). Also provided are processes for the production of alkyl lactate, oligomeric lactic acid, lactide, alkyl lactyllactate, poly-lactic acid, propylene glycol and acrylic acid.

公开(公告)号：US10174131B2

公开(公告)日：2019-01-08

申请号：US15302376

申请日：2015-04-09

Applicant: PLAXICA LIMITED

Inventor： Urvish Rameshchandra Pandya

IPC: C07C67/08 ,  C08B37/00 ,  C07C51/00 ,  C13K13/00

Abstract: A process for the production of hemicellulose derived monosaccharides comprising: (a) contacting an aqueous hemicellulosic stream with a C3-8 alkyl alcohol at elevated temperature and acidic pH to produce a reaction mixture comprising at C3-8 alkyl ester and a hemicellulose-derived monosaccharide; and (b) separating the reaction mixture obtained from step (a) into an aqueous phase comprising said hemicellulose-derived monosaccharide and an organic phase comprising said C3-08 alkyl ester. The product of step (b) may be further processed using an optional step: (c) reacting said hemicellulose-derived monosaccharide obtained from step (b) with a metal hydroxide or a quaternary ammonium hydroxide to produce a metal lactate or quaternary ammonium lactate.

公开(公告)号：US20160185704A1

公开(公告)日：2016-06-30

申请号：US14912372

申请日：2014-09-05

Applicant: PLAXICA LIMITED

Inventor： Stephen Donegan ,  Philip James Goodier ,  Edward Leslie Marshall ,  Urvish Rameshchandra Pandya ,  Ajitkumar Mukundrai Patel

IPC: C07C51/02 ,  C07C51/41 ,  C07C67/08

CPC classification number: C07C51/02 ,  A01N63/02 ,  A61K35/744 ,  C01B7/03 ,  C01D1/04 ,  C01D3/04 ,  C07C51/295 ,  C07C51/41 ,  C07C59/08 ,  C07C67/08 ,  C07C69/68

Abstract: A process for producing lactic acid is provided. The process comprises (a) reacting a stream rich in saccharide with sodium hydroxide in the presence of water to produce a reaction mixture comprising sodium lactate; (b) reacting at least a portion of the sodium lactate with HCl to produce lactic acid and sodium chloride; (c) converting at least a portion of the sodium chloride to chlorine and sodium hydroxide; and (d) recycling at least a portion of the sodium hydroxide produced in step (c) to step (a). Also provided are processes for the production of alkyl lactate, oligomeric lactic acid, lactide, alkyl lactyllactate, poly-lactic acid, propylene glycol and acrylic acid.

Abstract translation: 提供了一种生产乳酸的方法。 该方法包括（a）在水的存在下使富含糖的物流与氢氧化钠反应，以产生包含乳酸钠的反应混合物; （b）使至少一部分乳酸钠与HCl反应生成乳酸和氯化钠; （c）将至少一部分氯化钠转化成氯和氢氧化钠; 和（d）将步骤（c）中产生的至少一部分氢氧化钠再循环到步骤（a）。 还提供了用于制备乳酸烷基酯，低聚乳酸，丙交酯，乳糖基乳酸烷基酯，聚乳酸，丙二醇和丙烯酸的方法。