摘要:
Provided are a high-quality curcumin product, a production method therefor and an application thereof. The high-quality curcumin product has low solvent residue, good fluidity, and a high bulk density. The method for producing the product comprises the following steps: using a turmeric extract as a raw material, adding a certain proportion of a crystallization agent, dissolving at high temperature, then continuing heating or refluxing, cooling and crystallization, and then centrifuging or filtering to obtain crude curcumin, and further drying to obtain high-quality curcumin. The high-quality curcumin can be used as an additive for food, medicine, feed, cosmetics, etc.
摘要:
The present invention provides a method for dehydration of a water containing source of formaldehyde having an excellent dehydration performance, and a method for producing (meth)acrylic acid alkyl ester using a dehydrated source of formaldehyde. The present invention provides a method for dehydration of a water containing source of formaldehyde wherein water is separated from the water containing source of formaldehyde containing formaldehyde and water using a zeolite membrane wherein the water containing source of formaldehyde comprises a separation enhancer having a relative static permittivity of between 2.5 and 20 and wherein the water containing source of formaldehyde further contains methanol. The invention extends to a method for producing (meth)acrylic acid alkyl ester by reaction with carboxylic acid ester using a dehydrated source of formaldehyde obtained by a dehydration wherein water is separated from the water containing source of formaldehyde containing formaldehyde and water using a zeolite membrane.
摘要:
A process for producing acrolein, comprising: a glycerin dehydration step of conducting dehydration reaction of glycerin to obtain an acrolein-containing gas; a partial-condensation step of cooling the acrolein-containing gas to condense a part of acrolein, water and a high-boiling substance contained in the acrolein-containing gas, thereby obtaining a purified gas and a condensate; and a separation step of separating the purified gas from the condensate; wherein a polymerization inhibitor is added to the acrolein-containing gas or the condensate in the partial-condensation step.
摘要:
In an embodiment, a method of recovering acetone comprises separating a bisphenol A stream into a bisphenol A product stream and an extraction stream comprising unreacted acetone; recovering the unreacted acetone in a recovery section of the bisphenol A production facility and forming a bisphenol A plant acetone recovery stream comprising methanol and a recovered acetone; introducing the bisphenol A plant acetone recovery stream to a phenol purification plant; and purifying the bisphenol A plant acetone recovery stream in the phenol purification plant to form an acetone product stream. The acetone product stream can comprise a reduced amount of methanol as compared to the bisphenol A plant acetone recovery stream.