PROCESS FOR RECOVERING CITRIC ACID.

申请公布号：MX9701863(A)

申请号：MX19970001863

申请日期：1995.09.12

申请公布日期：1998.05.31

申请人：

AECI LIMITED;USTECH INC.

发明人：FRANCIS H. VERHOFF;SANET GROND;FADL HENDRICKS;LAKSHMINARAYANAN PATTABIRAMAN;RAMAN

分类号：C07C51/42;C07C59/265;(IPC1-7):C07C59/265;C07C51/43;C07C51/47

主分类号：C07C51/42

摘要：<p>A process for treating a liquid comprising subjecting a liquid containing, in solution, citric acid as well as a less desirable component having a similar molecular weight to citric acid, to nanofiltration in a filtration step. From the filtration step, a permeate in which the ratio of the concentration of the citric acid to that of the less desirable component is greater than the ratio of the concentration of the citric acid to that of the less desirable component in the solution, is obtained.</p>

Touch screen input method and device

Multi-contact character input method and system

Liquid crystal display device and method of driving same

Internal antenna supporting wideband impedance matching

Antenna system

Integrated 3-dimensional electromagnetic element arrays

Recording circuit and a method of controlling the same

User-managed parking system

Device for providing information on positioning of a moveable coupling of a marine fluid loading system

Fuse and breaker alarm device and method using a finite state machine

Integrated document holder and RFID tag

Tire pressure monitoring apparatus and method

Impact alert system and method

Apparatus and method for electronic access control

Multi unit controller

Touch panel

Transformer and display device using the same

Recycled butyl ionomers and recycling processes

Polymer precursor, high transparency polyimide precursor, polymer compound, resin composition and article using thereof

Maleimide copolymer, process for the production thereof, and heat resistant resin compositions containing same