马来酸

Agent TJ-201 is an organic phosphonocarboxylic acid containing maleic group, p hosphonic group, and ethoxyl group etc.

TJ-201是一种含马来酸基、磷酸亚基、氧乙烯基等的膦基聚羧酸。

ABSTRACT Agent TJ-201 is an organic phosphonocarboxylic acid containing maleic group, p hosphonic group, and ethoxyl group etc.

摘 要 TJ-201是一种含马来酸基、磷酸亚基、氧乙烯基等的膦基聚羧酸。

There are many methods to produce funmaric acid, such as starch paraffin fermentation and maleic acid isomerization.

富马酸的生产方法有很多种，主要有淀粉石蜡发酵和马来酸异构化。

Some food products are fortified with calcium lactate, calcium gluconate, calcium malate or calcium citrate-maleate .

一些食品也添加了乳酸钙，葡萄糖酸钙，钙，苹果酸或柠檬酸钙，马来酸。

Objective: To establish a method for the determination of maleic acid in fumaric acid by ion exchange chromatography.

目的：建立离子交换色谱法检测食品添加剂富马酸中杂质马来酸。

This article presents a laboratory synthetic method of the thermal polymerization of maleic acid and ammonia.

以马来酸为原料，合成了聚天冬氨酸，并用核磁共振、凝胶色谱等方法对其结构进行了分析，测定了重均分子量。

Conslusion: The method was simple, rapid, sensitive and accurate. It's suitable for determination of maleic acid in fumaric acid as food additives.

该法简便、快速、灵敏、准确，可用于食品添加剂富马酸中马来酸的检测。

The present invention adopts the technical proposal of adopting ZSM-5 mesoporous molecular sieve raw powder with a silicon-aluminum mol ratio SiO2Al2O3 of 20 to 1000 and a weight percentage of 20 to 100 percent as well as at least one caking agent selected from SiO2, clay and Al2O3 to extrude, tablet or spray into shape; then treating for 1 to 8 hours by 0.1 to 3 mol/l of at least one ammonium liquor from ammonium nitrate, ammonium chloride or ammonium sulphate or 0.1 to 8.5 mol/l of at least one acid liquor from muriatic acid, nitric acid, vitriol or acetic acid under a temperature of 20 to 90 DEG C; then using steam to treat for 2 to 15 hours under the temperature condition of 400 to 700 DEG C; using a liquor of 0.1 to 3mol/l selected from at least one of oxalic acid, citric acid or maleic acid under a temperature condition of 20 to 90 DEG C to dip for 2 to 5 hours to obtain the modified molecular sieve catalyst, thus better solving the problems.

本发明通过采用硅铝比SiO2/Al2O3为20～1000重量百分比计20～100％的ZSM-5介孔分子筛原粉与余量的选自SiO2、粘土或Al2O3中至少一种粘结剂挤条、压片或喷球成型；再经过0.1～3摩尔/升选自硝酸铵、氯化铵或硫酸铵中的至少一种铵溶液或0.1～8.5摩尔/升选自盐酸、硝酸、硫酸或乙酸中的至少一种酸溶液在温度20～90℃下处理1～8小时；然后在温度为400～700℃条件下水蒸汽处理2～15小时；再用0.1～3摩尔/升选自草酸、柠檬酸或马来酸中至少一种在温度为20～90℃条件下浸渍2～5小时得所需改性分子筛催化剂的技术方案较好地解决了该问题，可用于甲醇转化制丙烯的工业生产中。

On the basis of the former results, Miscibility of unseparated reaction solution with varied resins were investigated by means of co-solvent method and the glossiness of the film method. The miscibility of 344# acrylic resin with the mixture was better than others, when the ratio of the mixture to 344# acrylic resin was one to ten, the miscibility attained best, and the glossiness of the film was 100 percent.The effect of miscibility and molecular weight on delaminating rate were investigated by the co-solvent method.

在聚马来酸醉溶解性能、相容性测定的基础上，通过共溶剂法、溶液涂膜法和溶解度参数法，考察了反应液不分离直接和不同树脂复配的情况。344#短油度醇酸树脂和接枝物的相容性较好，在接枝物：短油度醇酸树脂=1：10时，相容性达到最好，涂膜光泽值达到100%。

Diethyl maleate was synthesized from maleic anhydride and ethyl alcohol in the presence of ammonium ferric sulfate dodecahydrate.

在十二水合硫酸铁铵存在下，由马来酸酐与乙醇合成了马来酸二乙酯，研究了反应的影响因素和催化剂的重复使用性能。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。